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1 : : // Copyright (c) 2009-2010 Satoshi Nakamoto
2 : : // Copyright (c) 2009-present The Bitcoin Core developers
3 : : // Distributed under the MIT software license, see the accompanying
4 : : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
5 : :
6 : : #include <bitcoin-build-config.h> // IWYU pragma: keep
7 : :
8 : : #include <validation.h>
9 : :
10 : : #include <arith_uint256.h>
11 : : #include <chain.h>
12 : : #include <checkqueue.h>
13 : : #include <clientversion.h>
14 : : #include <consensus/amount.h>
15 : : #include <consensus/consensus.h>
16 : : #include <consensus/merkle.h>
17 : : #include <consensus/tx_check.h>
18 : : #include <consensus/tx_verify.h>
19 : : #include <consensus/validation.h>
20 : : #include <cuckoocache.h>
21 : : #include <flatfile.h>
22 : : #include <hash.h>
23 : : #include <kernel/chainparams.h>
24 : : #include <kernel/coinstats.h>
25 : : #include <kernel/disconnected_transactions.h>
26 : : #include <kernel/mempool_entry.h>
27 : : #include <kernel/messagestartchars.h>
28 : : #include <kernel/notifications_interface.h>
29 : : #include <kernel/types.h>
30 : : #include <kernel/warning.h>
31 : : #include <logging/timer.h>
32 : : #include <node/blockstorage.h>
33 : : #include <node/utxo_snapshot.h>
34 : : #include <policy/ephemeral_policy.h>
35 : : #include <policy/policy.h>
36 : : #include <policy/rbf.h>
37 : : #include <policy/settings.h>
38 : : #include <policy/truc_policy.h>
39 : : #include <pow.h>
40 : : #include <primitives/block.h>
41 : : #include <primitives/transaction.h>
42 : : #include <random.h>
43 : : #include <script/script.h>
44 : : #include <script/sigcache.h>
45 : : #include <signet.h>
46 : : #include <tinyformat.h>
47 : : #include <txdb.h>
48 : : #include <txmempool.h>
49 : : #include <uint256.h>
50 : : #include <undo.h>
51 : : #include <util/byte_units.h>
52 : : #include <util/check.h>
53 : : #include <util/fs.h>
54 : : #include <util/fs_helpers.h>
55 : : #include <util/hasher.h>
56 : : #include <util/log.h>
57 : : #include <util/moneystr.h>
58 : : #include <util/rbf.h>
59 : : #include <util/result.h>
60 : : #include <util/signalinterrupt.h>
61 : : #include <util/strencodings.h>
62 : : #include <util/string.h>
63 : : #include <util/time.h>
64 : : #include <util/trace.h>
65 : : #include <util/translation.h>
66 : : #include <validationinterface.h>
67 : :
68 : : #include <algorithm>
69 : : #include <cassert>
70 : : #include <chrono>
71 : : #include <deque>
72 : : #include <numeric>
73 : : #include <optional>
74 : : #include <ranges>
75 : : #include <span>
76 : : #include <string>
77 : : #include <tuple>
78 : : #include <utility>
79 : :
80 : : using kernel::CCoinsStats;
81 : : using kernel::ChainstateRole;
82 : : using kernel::CoinStatsHashType;
83 : : using kernel::ComputeUTXOStats;
84 : : using kernel::Notifications;
85 : :
86 : : using fsbridge::FopenFn;
87 : : using node::BlockManager;
88 : : using node::BlockMap;
89 : : using node::CBlockIndexHeightOnlyComparator;
90 : : using node::CBlockIndexWorkComparator;
91 : : using node::SnapshotMetadata;
92 : :
93 : : /** Time window to wait between writing blocks/block index and chainstate to disk.
94 : : * Randomize writing time inside the window to prevent a situation where the
95 : : * network over time settles into a few cohorts of synchronized writers.
96 : : */
97 : : static constexpr auto DATABASE_WRITE_INTERVAL_MIN{50min};
98 : : static constexpr auto DATABASE_WRITE_INTERVAL_MAX{70min};
99 : : /** Maximum age of our tip for us to be considered current for fee estimation */
100 : : static constexpr std::chrono::hours MAX_FEE_ESTIMATION_TIP_AGE{3};
101 : : const std::vector<std::string> CHECKLEVEL_DOC {
102 : : "level 0 reads the blocks from disk",
103 : : "level 1 verifies block validity",
104 : : "level 2 verifies undo data",
105 : : "level 3 checks disconnection of tip blocks",
106 : : "level 4 tries to reconnect the blocks",
107 : : "each level includes the checks of the previous levels",
108 : : };
109 : : /** The number of blocks to keep below the deepest prune lock.
110 : : * There is nothing special about this number. It is higher than what we
111 : : * expect to see in regular mainnet reorgs, but not so high that it would
112 : : * noticeably interfere with the pruning mechanism.
113 : : * */
114 : : static constexpr int PRUNE_LOCK_BUFFER{10};
115 : :
116 : : // Return whether the completed full flush should compact chainstate
117 : 117886 : static bool ShouldCompactChainstate(bool in_ibd)
118 : : {
119 : 117886 : static constexpr uint32_t flush_ratio{320}; // Roughly every 2 weeks with hourly flushes
120 [ + + + + ]: 135925 : return !in_ibd && FastRandomContext().randrange(flush_ratio) == 0;
121 : : }
122 : :
123 : : TRACEPOINT_SEMAPHORE(validation, block_connected);
124 : : TRACEPOINT_SEMAPHORE(utxocache, flush);
125 : : TRACEPOINT_SEMAPHORE(mempool, replaced);
126 : : TRACEPOINT_SEMAPHORE(mempool, rejected);
127 : :
128 : 944 : const CBlockIndex* Chainstate::FindForkInGlobalIndex(const CBlockLocator& locator) const
129 : : {
130 : 944 : AssertLockHeld(cs_main);
131 : :
132 : : // Find the latest block common to locator and chain - we expect that
133 : : // locator.vHave is sorted descending by height.
134 [ + + ]: 3095 : for (const uint256& hash : locator.vHave) {
135 : 2151 : const CBlockIndex* pindex{m_blockman.LookupBlockIndex(hash)};
136 [ - + ]: 2151 : if (pindex) {
137 [ # # ]: 0 : if (m_chain.Contains(*pindex)) {
138 : : return pindex;
139 : : }
140 [ # # # # : 0 : if (pindex->GetAncestor(m_chain.Height()) == m_chain.Tip()) {
# # ]
141 : 944 : return m_chain.Tip();
142 : : }
143 : : }
144 : : }
145 [ - + ]: 944 : return m_chain.Genesis();
146 : : }
147 : :
148 : : bool CheckInputScripts(const CTransaction& tx, TxValidationState& state,
149 : : const CCoinsViewCache& inputs, script_verify_flags flags, bool cacheSigStore,
150 : : bool cacheFullScriptStore, PrecomputedTransactionData& txdata,
151 : : ValidationCache& validation_cache,
152 : : std::vector<CScriptCheck>* pvChecks = nullptr)
153 : : EXCLUSIVE_LOCKS_REQUIRED(cs_main);
154 : :
155 : 2283202 : bool CheckFinalTxAtTip(const CBlockIndex& active_chain_tip, const CTransaction& tx)
156 : : {
157 : 2283202 : AssertLockHeld(cs_main);
158 : :
159 : : // CheckFinalTxAtTip() uses active_chain_tip.Height()+1 to evaluate
160 : : // nLockTime because when IsFinalTx() is called within
161 : : // AcceptBlock(), the height of the block *being*
162 : : // evaluated is what is used. Thus if we want to know if a
163 : : // transaction can be part of the *next* block, we need to call
164 : : // IsFinalTx() with one more than active_chain_tip.Height().
165 : 2283202 : const int nBlockHeight = active_chain_tip.nHeight + 1;
166 : :
167 : : // BIP113 requires that time-locked transactions have nLockTime set to
168 : : // less than the median time of the previous block they're contained in.
169 : : // When the next block is created its previous block will be the current
170 : : // chain tip, so we use that to calculate the median time passed to
171 : : // IsFinalTx().
172 : 2283202 : const int64_t nBlockTime{active_chain_tip.GetMedianTimePast()};
173 : :
174 : 2283202 : return IsFinalTx(tx, nBlockHeight, nBlockTime);
175 : : }
176 : :
177 : : namespace {
178 : : /**
179 : : * A helper which calculates heights of inputs of a given transaction.
180 : : *
181 : : * @param[in] tip The current chain tip. If an input belongs to a mempool
182 : : * transaction, we assume it will be confirmed in the next block.
183 : : * @param[in] coins Any CCoinsView that provides access to the relevant coins.
184 : : * @param[in] tx The transaction being evaluated.
185 : : *
186 : : * @returns A vector of input heights or nullopt, in case of an error.
187 : : */
188 : 1405549 : std::optional<std::vector<int>> CalculatePrevHeights(
189 : : const CBlockIndex& tip,
190 : : const CCoinsView& coins,
191 : : const CTransaction& tx)
192 : : {
193 : 1405549 : std::vector<int> prev_heights;
194 [ - + + - ]: 1405549 : prev_heights.resize(tx.vin.size());
195 [ - + + + ]: 6634147 : for (size_t i = 0; i < tx.vin.size(); ++i) {
196 [ + - + - ]: 5228598 : if (auto coin{coins.GetCoin(tx.vin[i].prevout)}) {
197 [ + + ]: 10457196 : prev_heights[i] = coin->nHeight == MEMPOOL_HEIGHT
198 [ + + ]: 5228598 : ? tip.nHeight + 1 // Assume all mempool transaction confirm in the next block.
199 : 2884519 : : coin->nHeight;
200 : : } else {
201 [ # # # # ]: 0 : LogInfo("ERROR: %s: Missing input %d in transaction \'%s\'\n", __func__, i, tx.GetHash().GetHex());
202 : 0 : return std::nullopt;
203 : 5228598 : }
204 : : }
205 : 1405549 : return prev_heights;
206 : 1405549 : }
207 : : } // namespace
208 : :
209 : 1405549 : std::optional<LockPoints> CalculateLockPointsAtTip(
210 : : CBlockIndex* tip,
211 : : const CCoinsView& coins_view,
212 : : const CTransaction& tx)
213 : : {
214 [ - + ]: 1405549 : assert(tip);
215 : :
216 : 1405549 : auto prev_heights{CalculatePrevHeights(*tip, coins_view, tx)};
217 [ - + ]: 1405549 : if (!prev_heights.has_value()) return std::nullopt;
218 : :
219 : 1405549 : CBlockIndex next_tip;
220 : 1405549 : next_tip.pprev = tip;
221 : : // When SequenceLocks() is called within ConnectBlock(), the height
222 : : // of the block *being* evaluated is what is used.
223 : : // Thus if we want to know if a transaction can be part of the
224 : : // *next* block, we need to use one more than active_chainstate.m_chain.Height()
225 : 1405549 : next_tip.nHeight = tip->nHeight + 1;
226 [ + - + - ]: 1405549 : const auto [min_height, min_time] = CalculateSequenceLocks(tx, STANDARD_LOCKTIME_VERIFY_FLAGS, prev_heights.value(), next_tip);
227 : :
228 : : // Also store the hash of the block with the highest height of
229 : : // all the blocks which have sequence locked prevouts.
230 : : // This hash needs to still be on the chain
231 : : // for these LockPoint calculations to be valid
232 : : // Note: It is impossible to correctly calculate a maxInputBlock
233 : : // if any of the sequence locked inputs depend on unconfirmed txs,
234 : : // except in the special case where the relative lock time/height
235 : : // is 0, which is equivalent to no sequence lock. Since we assume
236 : : // input height of tip+1 for mempool txs and test the resulting
237 : : // min_height and min_time from CalculateSequenceLocks against tip+1.
238 : 1405549 : int max_input_height{0};
239 [ + - + + ]: 6634147 : for (const int height : prev_heights.value()) {
240 : : // Can ignore mempool inputs since we'll fail if they had non-zero locks
241 [ + + ]: 5228598 : if (height != next_tip.nHeight) {
242 [ + + ]: 9633317 : max_input_height = std::max(max_input_height, height);
243 : : }
244 : : }
245 : :
246 : : // tip->GetAncestor(max_input_height) should never return a nullptr
247 : : // because max_input_height is always less than the tip height.
248 : : // It would, however, be a bad bug to continue execution, since a
249 : : // LockPoints object with the maxInputBlock member set to nullptr
250 : : // signifies no relative lock time.
251 [ + - - + ]: 1405549 : return LockPoints{min_height, min_time, Assert(tip->GetAncestor(max_input_height))};
252 : 1405549 : }
253 : :
254 : 1405549 : bool CheckSequenceLocksAtTip(CBlockIndex* tip,
255 : : const LockPoints& lock_points)
256 : : {
257 [ - + ]: 1405549 : assert(tip != nullptr);
258 : :
259 : 1405549 : CBlockIndex index;
260 : 1405549 : index.pprev = tip;
261 : : // CheckSequenceLocksAtTip() uses active_chainstate.m_chain.Height()+1 to evaluate
262 : : // height based locks because when SequenceLocks() is called within
263 : : // ConnectBlock(), the height of the block *being*
264 : : // evaluated is what is used.
265 : : // Thus if we want to know if a transaction can be part of the
266 : : // *next* block, we need to use one more than active_chainstate.m_chain.Height()
267 : 1405549 : index.nHeight = tip->nHeight + 1;
268 : :
269 : 1405549 : return EvaluateSequenceLocks(index, {lock_points.height, lock_points.time});
270 : : }
271 : :
272 : 525867 : static void LimitMempoolSize(CTxMemPool& pool, CCoinsViewCache& coins_cache)
273 : : EXCLUSIVE_LOCKS_REQUIRED(::cs_main, pool.cs)
274 : : {
275 : 525867 : AssertLockHeld(::cs_main);
276 : 525867 : AssertLockHeld(pool.cs);
277 : 525867 : int expired = pool.Expire(GetTime<std::chrono::seconds>() - pool.m_opts.expiry);
278 [ + + ]: 525867 : if (expired != 0) {
279 [ - + ]: 10665 : LogDebug(BCLog::MEMPOOL, "Expired %i transactions from the memory pool\n", expired);
280 : : }
281 : :
282 : 525867 : std::vector<COutPoint> vNoSpendsRemaining;
283 [ + - ]: 525867 : pool.TrimToSize(pool.m_opts.max_size_bytes, &vNoSpendsRemaining);
284 [ + + ]: 603264 : for (const COutPoint& removed : vNoSpendsRemaining)
285 [ + - ]: 77397 : coins_cache.Uncache(removed);
286 : 525867 : }
287 : :
288 : 370414 : static bool IsCurrentForFeeEstimation(Chainstate& active_chainstate) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
289 : : {
290 : 370414 : AssertLockHeld(cs_main);
291 [ + - ]: 370414 : if (active_chainstate.m_chainman.IsInitialBlockDownload()) {
292 : : return false;
293 : : }
294 [ - + + + ]: 740828 : if (active_chainstate.m_chain.Tip()->GetBlockTime() < count_seconds(GetTime<std::chrono::seconds>() - MAX_FEE_ESTIMATION_TIP_AGE))
295 : : return false;
296 [ - + - + ]: 33237 : if (active_chainstate.m_chain.Height() < active_chainstate.m_chainman.m_best_header->nHeight - 1) {
297 : 0 : return false;
298 : : }
299 : : return true;
300 : : }
301 : :
302 : 0 : void Chainstate::MaybeUpdateMempoolForReorg(
303 : : DisconnectedBlockTransactions& disconnectpool,
304 : : bool fAddToMempool)
305 : : {
306 [ # # ]: 0 : if (!m_mempool) return;
307 : :
308 : 0 : AssertLockHeld(cs_main);
309 : 0 : AssertLockHeld(m_mempool->cs);
310 : 0 : std::vector<Txid> vHashUpdate;
311 : 0 : {
312 : : // disconnectpool is ordered so that the front is the most recently-confirmed
313 : : // transaction (the last tx of the block at the tip) in the disconnected chain.
314 : : // Iterate disconnectpool in reverse, so that we add transactions
315 : : // back to the mempool starting with the earliest transaction that had
316 : : // been previously seen in a block.
317 [ # # ]: 0 : const auto queuedTx = disconnectpool.take();
318 : 0 : auto it = queuedTx.rbegin();
319 [ # # ]: 0 : while (it != queuedTx.rend()) {
320 : : // ignore validation errors in resurrected transactions
321 [ # # # # : 0 : if (!fAddToMempool || (*it)->IsCoinBase() ||
# # ]
322 [ # # # # ]: 0 : AcceptToMemoryPool(*this, *it, GetTime(),
323 [ # # ]: 0 : /*bypass_limits=*/true, /*test_accept=*/false).m_result_type !=
324 : : MempoolAcceptResult::ResultType::VALID) {
325 : : // If the transaction doesn't make it in to the mempool, remove any
326 : : // transactions that depend on it (which would now be orphans).
327 [ # # ]: 0 : m_mempool->removeRecursive(**it, MemPoolRemovalReason::REORG);
328 [ # # # # ]: 0 : } else if (m_mempool->exists((*it)->GetHash())) {
329 [ # # ]: 0 : vHashUpdate.push_back((*it)->GetHash());
330 : : }
331 : 0 : ++it;
332 : : }
333 : 0 : }
334 : :
335 : : // AcceptToMemoryPool/addNewTransaction all assume that new mempool entries have
336 : : // no in-mempool children, which is generally not true when adding
337 : : // previously-confirmed transactions back to the mempool.
338 : : // UpdateTransactionsFromBlock finds descendants of any transactions in
339 : : // the disconnectpool that were added back and cleans up the mempool state.
340 [ # # ]: 0 : m_mempool->UpdateTransactionsFromBlock(vHashUpdate);
341 : :
342 : : // Predicate to use for filtering transactions in removeForReorg.
343 : : // Checks whether the transaction is still final and, if it spends a coinbase output, mature.
344 : : // Also updates valid entries' cached LockPoints if needed.
345 : : // If false, the tx is still valid and its lockpoints are updated.
346 : : // If true, the tx would be invalid in the next block; remove this entry and all of its descendants.
347 : : // Note that TRUC rules are not applied here, so reorgs may cause violations of TRUC inheritance or
348 : : // topology restrictions.
349 : 0 : const auto filter_final_and_mature = [&](CTxMemPool::txiter it)
350 : : EXCLUSIVE_LOCKS_REQUIRED(m_mempool->cs, ::cs_main) {
351 : 0 : AssertLockHeld(m_mempool->cs);
352 : 0 : AssertLockHeld(::cs_main);
353 [ # # ]: 0 : const CTransaction& tx = it->GetTx();
354 : :
355 : : // The transaction must be final.
356 [ # # # # : 0 : if (!CheckFinalTxAtTip(*Assert(m_chain.Tip()), tx)) return true;
# # ]
357 : :
358 : 0 : const LockPoints& lp = it->GetLockPoints();
359 : : // CheckSequenceLocksAtTip checks if the transaction will be final in the next block to be
360 : : // created on top of the new chain.
361 [ # # ]: 0 : if (TestLockPointValidity(m_chain, lp)) {
362 [ # # # # ]: 0 : if (!CheckSequenceLocksAtTip(m_chain.Tip(), lp)) {
363 : : return true;
364 : : }
365 : : } else {
366 : 0 : const CCoinsViewMemPool view_mempool{&CoinsTip(), *m_mempool};
367 [ # # # # ]: 0 : const std::optional<LockPoints> new_lock_points{CalculateLockPointsAtTip(m_chain.Tip(), view_mempool, tx)};
368 [ # # # # : 0 : if (new_lock_points.has_value() && CheckSequenceLocksAtTip(m_chain.Tip(), *new_lock_points)) {
# # # # ]
369 : : // Now update the mempool entry lockpoints as well.
370 : 0 : it->UpdateLockPoints(*new_lock_points);
371 : : } else {
372 : 0 : return true;
373 : : }
374 : 0 : }
375 : :
376 : : // If the transaction spends any coinbase outputs, it must be mature.
377 [ # # ]: 0 : if (it->GetSpendsCoinbase()) {
378 [ # # ]: 0 : for (const CTxIn& txin : tx.vin) {
379 [ # # ]: 0 : if (m_mempool->exists(txin.prevout.hash)) continue;
380 : 0 : const Coin& coin{CoinsTip().AccessCoin(txin.prevout)};
381 [ # # ]: 0 : assert(!coin.IsSpent());
382 [ # # ]: 0 : const auto mempool_spend_height{m_chain.Tip()->nHeight + 1};
383 [ # # # # ]: 0 : if (coin.IsCoinBase() && mempool_spend_height - coin.nHeight < COINBASE_MATURITY) {
384 : : return true;
385 : : }
386 : : }
387 : : }
388 : : // Transaction is still valid and cached LockPoints are updated.
389 : : return false;
390 : 0 : };
391 : :
392 : : // We also need to remove any now-immature transactions
393 [ # # ]: 0 : m_mempool->removeForReorg(m_chain, filter_final_and_mature);
394 : : // Re-limit mempool size, in case we added any transactions
395 [ # # # # ]: 0 : LimitMempoolSize(*m_mempool, this->CoinsTip());
396 : 0 : }
397 : :
398 : : /**
399 : : * Checks to avoid mempool polluting consensus critical paths since cached
400 : : * signature and script validity results will be reused if we validate this
401 : : * transaction again during block validation.
402 : : * */
403 : 387296 : static bool CheckInputsFromMempoolAndCache(const CTransaction& tx, TxValidationState& state,
404 : : const CCoinsViewCache& view, const CTxMemPool& pool,
405 : : script_verify_flags flags, PrecomputedTransactionData& txdata, CCoinsViewCache& coins_tip,
406 : : ValidationCache& validation_cache)
407 : : EXCLUSIVE_LOCKS_REQUIRED(cs_main, pool.cs)
408 : : {
409 : 387296 : AssertLockHeld(cs_main);
410 : 387296 : AssertLockHeld(pool.cs);
411 : :
412 [ - + ]: 387296 : assert(!tx.IsCoinBase());
413 [ + + ]: 1058821 : for (const CTxIn& txin : tx.vin) {
414 : 671525 : const Coin& coin = view.AccessCoin(txin.prevout);
415 : :
416 : : // This coin was checked in PreChecks and MemPoolAccept
417 : : // has been holding cs_main since then.
418 [ - + ]: 671525 : Assume(!coin.IsSpent());
419 [ + - ]: 671525 : if (coin.IsSpent()) return false;
420 : :
421 : : // If the Coin is available, there are 2 possibilities:
422 : : // it is available in our current ChainstateActive UTXO set,
423 : : // or it's a UTXO provided by a transaction in our mempool.
424 : : // Ensure the scriptPubKeys in Coins from CoinsView are correct.
425 : 671525 : const CTransactionRef& txFrom = pool.get(txin.prevout.hash);
426 [ + + ]: 671525 : if (txFrom) {
427 [ - + ]: 239454 : assert(txFrom->GetHash() == txin.prevout.hash);
428 [ - + - + ]: 239454 : assert(txFrom->vout.size() > txin.prevout.n);
429 [ - + ]: 239454 : assert(txFrom->vout[txin.prevout.n] == coin.out);
430 : : } else {
431 [ + - ]: 432071 : const Coin& coinFromUTXOSet = coins_tip.AccessCoin(txin.prevout);
432 [ - + ]: 432071 : assert(!coinFromUTXOSet.IsSpent());
433 [ - + ]: 432071 : assert(coinFromUTXOSet.out == coin.out);
434 : : }
435 : 671525 : }
436 : :
437 : : // Call CheckInputScripts() to cache signature and script validity against current tip consensus rules.
438 : 387296 : return CheckInputScripts(tx, state, view, flags, /* cacheSigStore= */ true, /* cacheFullScriptStore= */ true, txdata, validation_cache);
439 : : }
440 : :
441 : : namespace {
442 : :
443 : : class MemPoolAccept
444 : : {
445 : : public:
446 : 2556237 : explicit MemPoolAccept(CTxMemPool& mempool, Chainstate& active_chainstate) :
447 : 2556237 : m_pool(mempool),
448 : 2556237 : m_view(&CoinsViewEmpty::Get()),
449 [ + - + - ]: 2556237 : m_viewmempool(&active_chainstate.CoinsTip(), m_pool),
450 : 2556237 : m_active_chainstate(active_chainstate)
451 : : {
452 : 2556237 : }
453 : :
454 : : // We put the arguments we're handed into a struct, so we can pass them
455 : : // around easier.
456 : : struct ATMPArgs {
457 : : const CChainParams& m_chainparams;
458 : : const int64_t m_accept_time;
459 : : const bool m_bypass_limits;
460 : : /*
461 : : * Return any outpoints which were not previously present in the coins
462 : : * cache, but were added as a result of validating the tx for mempool
463 : : * acceptance. This allows the caller to optionally remove the cache
464 : : * additions if the associated transaction ends up being rejected by
465 : : * the mempool.
466 : : */
467 : : std::vector<COutPoint>& m_coins_to_uncache;
468 : : /** When true, the transaction or package will not be submitted to the mempool. */
469 : : const bool m_test_accept;
470 : : /** Whether we allow transactions to replace mempool transactions. If false,
471 : : * any transaction spending the same inputs as a transaction in the mempool is considered
472 : : * a conflict. */
473 : : const bool m_allow_replacement;
474 : : /** When true, allow sibling eviction. This only occurs in single transaction package settings. */
475 : : const bool m_allow_sibling_eviction;
476 : : /** Used to skip the LimitMempoolSize() call within AcceptSingleTransaction(). This should be used when multiple
477 : : * AcceptSubPackage calls are expected and the mempool will be trimmed at the end of AcceptPackage(). */
478 : : const bool m_package_submission;
479 : : /** When true, use package feerates instead of individual transaction feerates for fee-based
480 : : * policies such as mempool min fee and min relay fee.
481 : : */
482 : : const bool m_package_feerates;
483 : : /** Used for local submission of transactions to catch "absurd" fees
484 : : * due to fee miscalculation by wallets. std:nullopt implies unset, allowing any feerates.
485 : : * Any individual transaction failing this check causes immediate failure.
486 : : */
487 : : const std::optional<CFeeRate> m_client_maxfeerate;
488 : :
489 : : /** Parameters for single transaction mempool validation. */
490 : 1772638 : static ATMPArgs SingleAccept(const CChainParams& chainparams, int64_t accept_time,
491 : : bool bypass_limits, std::vector<COutPoint>& coins_to_uncache,
492 : : bool test_accept) {
493 : 1772638 : return ATMPArgs{/*chainparams=*/ chainparams,
494 : : /*accept_time=*/ accept_time,
495 : : /*bypass_limits=*/ bypass_limits,
496 : : /*coins_to_uncache=*/ coins_to_uncache,
497 : : /*test_accept=*/ test_accept,
498 : : /*allow_replacement=*/ true,
499 : : /*allow_sibling_eviction=*/ true,
500 : : /*package_submission=*/ false,
501 : : /*package_feerates=*/ false,
502 : : /*client_maxfeerate=*/ {}, // checked by caller
503 : 1772638 : };
504 : : }
505 : :
506 : : /** Parameters for test package mempool validation through testmempoolaccept. */
507 : 246271 : static ATMPArgs PackageTestAccept(const CChainParams& chainparams, int64_t accept_time,
508 : : std::vector<COutPoint>& coins_to_uncache) {
509 : 246271 : return ATMPArgs{/*chainparams=*/ chainparams,
510 : : /*accept_time=*/ accept_time,
511 : : /*bypass_limits=*/ false,
512 : : /*coins_to_uncache=*/ coins_to_uncache,
513 : : /*test_accept=*/ true,
514 : : /*allow_replacement=*/ false,
515 : : /*allow_sibling_eviction=*/ false,
516 : : /*package_submission=*/ false, // not submitting to mempool
517 : : /*package_feerates=*/ false,
518 : : /*client_maxfeerate=*/ {}, // checked by caller
519 : 246271 : };
520 : : }
521 : :
522 : : /** Parameters for child-with-parents package validation. */
523 : 537328 : static ATMPArgs PackageChildWithParents(const CChainParams& chainparams, int64_t accept_time,
524 : : std::vector<COutPoint>& coins_to_uncache, const std::optional<CFeeRate>& client_maxfeerate) {
525 : 537328 : return ATMPArgs{/*chainparams=*/ chainparams,
526 : : /*accept_time=*/ accept_time,
527 : : /*bypass_limits=*/ false,
528 : : /*coins_to_uncache=*/ coins_to_uncache,
529 : : /*test_accept=*/ false,
530 : : /*allow_replacement=*/ true,
531 : : /*allow_sibling_eviction=*/ false,
532 : : /*package_submission=*/ true,
533 : : /*package_feerates=*/ true,
534 : : /*client_maxfeerate=*/ client_maxfeerate,
535 : 537328 : };
536 : : }
537 : :
538 : : /** Parameters for a single transaction within a package. */
539 : 803127 : static ATMPArgs SingleInPackageAccept(const ATMPArgs& package_args) {
540 : 803127 : return ATMPArgs{/*chainparams=*/ package_args.m_chainparams,
541 : 803127 : /*accept_time=*/ package_args.m_accept_time,
542 : : /*bypass_limits=*/ false,
543 : : /*coins_to_uncache=*/ package_args.m_coins_to_uncache,
544 : 803127 : /*test_accept=*/ package_args.m_test_accept,
545 : : /*allow_replacement=*/ true,
546 : : /*allow_sibling_eviction=*/ true,
547 : : /*package_submission=*/ true, // trim at the end of AcceptPackage()
548 : : /*package_feerates=*/ false, // only 1 transaction
549 : : /*client_maxfeerate=*/ package_args.m_client_maxfeerate,
550 : 803127 : };
551 : : }
552 : :
553 : : private:
554 : : // Private ctor to avoid exposing details to clients and allowing the possibility of
555 : : // mixing up the order of the arguments. Use static functions above instead.
556 : 3359364 : ATMPArgs(const CChainParams& chainparams,
557 : : int64_t accept_time,
558 : : bool bypass_limits,
559 : : std::vector<COutPoint>& coins_to_uncache,
560 : : bool test_accept,
561 : : bool allow_replacement,
562 : : bool allow_sibling_eviction,
563 : : bool package_submission,
564 : : bool package_feerates,
565 : : std::optional<CFeeRate> client_maxfeerate)
566 : 3359364 : : m_chainparams{chainparams},
567 : 3359364 : m_accept_time{accept_time},
568 : 3359364 : m_bypass_limits{bypass_limits},
569 : 3359364 : m_coins_to_uncache{coins_to_uncache},
570 : 3359364 : m_test_accept{test_accept},
571 : 3359364 : m_allow_replacement{allow_replacement},
572 : 3359364 : m_allow_sibling_eviction{allow_sibling_eviction},
573 : 3359364 : m_package_submission{package_submission},
574 : 3359364 : m_package_feerates{package_feerates},
575 : 3359364 : m_client_maxfeerate{client_maxfeerate}
576 : : {
577 : : // If we are using package feerates, we must be doing package submission.
578 : : // It also means sibling eviction is not permitted.
579 [ + + ]: 3359364 : if (m_package_feerates) {
580 [ - + ]: 537328 : Assume(m_package_submission);
581 [ - + ]: 537328 : Assume(!m_allow_sibling_eviction);
582 : : }
583 [ + + - + ]: 3359364 : if (m_allow_sibling_eviction) Assume(m_allow_replacement);
584 : 3359364 : }
585 : : };
586 : :
587 : : /** Clean up all non-chainstate coins from m_view and m_viewmempool. */
588 : : void CleanupTemporaryCoins() EXCLUSIVE_LOCKS_REQUIRED(cs_main, m_pool.cs);
589 : :
590 : : // Single transaction acceptance
591 : 1772638 : MempoolAcceptResult AcceptSingleTransactionAndCleanup(const CTransactionRef& ptx, ATMPArgs& args) EXCLUSIVE_LOCKS_REQUIRED(cs_main) {
592 : 1772638 : LOCK(m_pool.cs);
593 [ + - ]: 1772638 : MempoolAcceptResult result = AcceptSingleTransactionInternal(ptx, args);
594 [ + - ]: 1772638 : ClearSubPackageState();
595 [ + - ]: 1772638 : return result;
596 : 1772638 : }
597 : : MempoolAcceptResult AcceptSingleTransactionInternal(const CTransactionRef& ptx, ATMPArgs& args) EXCLUSIVE_LOCKS_REQUIRED(cs_main, m_pool.cs);
598 : :
599 : : /**
600 : : * Multiple transaction acceptance. Transactions may or may not be interdependent, but must not
601 : : * conflict with each other, and the transactions cannot already be in the mempool. Parents must
602 : : * come before children if any dependencies exist.
603 : : */
604 : 246271 : PackageMempoolAcceptResult AcceptMultipleTransactionsAndCleanup(const std::vector<CTransactionRef>& txns, ATMPArgs& args) EXCLUSIVE_LOCKS_REQUIRED(cs_main) {
605 : 246271 : LOCK(m_pool.cs);
606 [ + - ]: 246271 : PackageMempoolAcceptResult result = AcceptMultipleTransactionsInternal(txns, args);
607 [ + - ]: 246271 : ClearSubPackageState();
608 [ + - ]: 246271 : return result;
609 : 246271 : }
610 : : PackageMempoolAcceptResult AcceptMultipleTransactionsInternal(const std::vector<CTransactionRef>& txns, ATMPArgs& args) EXCLUSIVE_LOCKS_REQUIRED(cs_main, m_pool.cs);
611 : :
612 : : /**
613 : : * Submission of a subpackage.
614 : : * If subpackage size == 1, calls AcceptSingleTransaction() with adjusted ATMPArgs to
615 : : * enable sibling eviction and creates a PackageMempoolAcceptResult
616 : : * wrapping the result.
617 : : *
618 : : * If subpackage size > 1, calls AcceptMultipleTransactions() with the provided ATMPArgs.
619 : : *
620 : : * Also cleans up all non-chainstate coins from m_view at the end.
621 : : */
622 : : PackageMempoolAcceptResult AcceptSubPackage(const std::vector<CTransactionRef>& subpackage, ATMPArgs& args)
623 : : EXCLUSIVE_LOCKS_REQUIRED(cs_main, m_pool.cs);
624 : :
625 : : /**
626 : : * Package (more specific than just multiple transactions) acceptance. Package must be a child
627 : : * with all of its unconfirmed parents, and topologically sorted.
628 : : */
629 : : PackageMempoolAcceptResult AcceptPackage(const Package& package, ATMPArgs& args) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
630 : :
631 : : private:
632 : : // All the intermediate state that gets passed between the various levels
633 : : // of checking a given transaction.
634 : : struct Workspace {
635 : 3037641 : explicit Workspace(const CTransactionRef& ptx) : m_ptx(ptx), m_hash(ptx->GetHash()) {}
636 : : /** Txids of mempool transactions that this transaction directly conflicts with or may
637 : : * replace via sibling eviction. */
638 : : std::set<Txid> m_conflicts;
639 : : /** Iterators to mempool entries that this transaction directly conflicts with or may
640 : : * replace via sibling eviction. */
641 : : CTxMemPool::setEntries m_iters_conflicting;
642 : : /** All mempool parents of this transaction. */
643 : : std::vector<CTxMemPoolEntry::CTxMemPoolEntryRef> m_parents;
644 : : /* Handle to the tx in the changeset */
645 : : CTxMemPool::ChangeSet::TxHandle m_tx_handle;
646 : : /** Whether RBF-related data structures (m_conflicts, m_iters_conflicting,
647 : : * m_replaced_transactions) include a sibling in addition to txns with conflicting inputs. */
648 : : bool m_sibling_eviction{false};
649 : :
650 : : /** Virtual size of the transaction as used by the mempool, calculated using serialized size
651 : : * of the transaction and sigops. */
652 : : int64_t m_vsize;
653 : : /** Fees paid by this transaction: total input amounts subtracted by total output amounts. */
654 : : CAmount m_base_fees;
655 : : /** Base fees + any fee delta set by the user with prioritisetransaction. */
656 : : CAmount m_modified_fees;
657 : :
658 : : /** If we're doing package validation (i.e. m_package_feerates=true), the "effective"
659 : : * package feerate of this transaction is the total fees divided by the total size of
660 : : * transactions (which may include its ancestors and/or descendants). */
661 : : CFeeRate m_package_feerate{0};
662 : :
663 : : const CTransactionRef& m_ptx;
664 : : /** Txid. */
665 : : const Txid& m_hash;
666 : : TxValidationState m_state;
667 : : /** A temporary cache containing serialized transaction data for signature verification.
668 : : * Reused across PolicyScriptChecks and ConsensusScriptChecks. */
669 : : PrecomputedTransactionData m_precomputed_txdata;
670 : : };
671 : :
672 : : // Run the policy checks on a given transaction, excluding any script checks.
673 : : // Looks up inputs, calculates feerate, considers replacement, evaluates
674 : : // package limits, etc. As this function can be invoked for "free" by a peer,
675 : : // only tests that are fast should be done here (to avoid CPU DoS).
676 : : bool PreChecks(ATMPArgs& args, Workspace& ws) EXCLUSIVE_LOCKS_REQUIRED(cs_main, m_pool.cs);
677 : :
678 : : // Run checks for mempool replace-by-fee, only used in AcceptSingleTransaction.
679 : : bool ReplacementChecks(Workspace& ws) EXCLUSIVE_LOCKS_REQUIRED(cs_main, m_pool.cs);
680 : :
681 : : bool PackageRBFChecks(const std::vector<CTransactionRef>& txns,
682 : : std::vector<Workspace>& workspaces,
683 : : int64_t total_vsize,
684 : : PackageValidationState& package_state) EXCLUSIVE_LOCKS_REQUIRED(cs_main, m_pool.cs);
685 : :
686 : : // Run the script checks using our policy flags. As this can be slow, we should
687 : : // only invoke this on transactions that have otherwise passed policy checks.
688 : : bool PolicyScriptChecks(const ATMPArgs& args, Workspace& ws) EXCLUSIVE_LOCKS_REQUIRED(cs_main, m_pool.cs);
689 : :
690 : : // Re-run the script checks, using consensus flags, and try to cache the
691 : : // result in the scriptcache. This should be done after
692 : : // PolicyScriptChecks(). This requires that all inputs either be in our
693 : : // utxo set or in the mempool.
694 : : bool ConsensusScriptChecks(const ATMPArgs& args, Workspace& ws) EXCLUSIVE_LOCKS_REQUIRED(cs_main, m_pool.cs);
695 : :
696 : : // Try to add the transaction to the mempool, removing any conflicts first.
697 : : void FinalizeSubpackage(const ATMPArgs& args) EXCLUSIVE_LOCKS_REQUIRED(cs_main, m_pool.cs);
698 : :
699 : : // Submit all transactions to the mempool and call ConsensusScriptChecks to add to the script
700 : : // cache - should only be called after successful validation of all transactions in the package.
701 : : // Does not call LimitMempoolSize(), so mempool max_size_bytes may be temporarily exceeded.
702 : : bool SubmitPackage(const ATMPArgs& args, std::vector<Workspace>& workspaces, PackageValidationState& package_state,
703 : : std::map<Wtxid, MempoolAcceptResult>& results)
704 : : EXCLUSIVE_LOCKS_REQUIRED(cs_main, m_pool.cs);
705 : :
706 : : // Compare a package's feerate against minimum allowed.
707 : 841912 : bool CheckFeeRate(size_t package_size, CAmount package_fee, TxValidationState& state) EXCLUSIVE_LOCKS_REQUIRED(::cs_main, m_pool.cs)
708 : : {
709 : 841912 : AssertLockHeld(::cs_main);
710 : 841912 : AssertLockHeld(m_pool.cs);
711 : 841912 : CAmount mempoolRejectFee = m_pool.GetMinFee().GetFee(package_size);
712 [ + + + + ]: 841912 : if (mempoolRejectFee > 0 && package_fee < mempoolRejectFee) {
713 [ + - + - ]: 35931 : return state.Invalid(TxValidationResult::TX_RECONSIDERABLE, "mempool min fee not met", strprintf("%d < %d", package_fee, mempoolRejectFee));
714 : : }
715 : :
716 [ + + ]: 805981 : if (package_fee < m_pool.m_opts.min_relay_feerate.GetFee(package_size)) {
717 [ + - + - ]: 73375 : return state.Invalid(TxValidationResult::TX_RECONSIDERABLE, "min relay fee not met",
718 : 146750 : strprintf("%d < %d", package_fee, m_pool.m_opts.min_relay_feerate.GetFee(package_size)));
719 : : }
720 : : return true;
721 : : }
722 : :
723 : 919472 : ValidationCache& GetValidationCache()
724 : : {
725 : 919472 : return m_active_chainstate.m_chainman.m_validation_cache;
726 : : }
727 : :
728 : : private:
729 : : CTxMemPool& m_pool;
730 : :
731 : : /** Holds a cached view of available coins from the UTXO set, mempool, and artificial temporary coins (to enable package validation).
732 : : * The view doesn't track whether a coin previously existed but has now been spent. We detect conflicts in other ways:
733 : : * - conflicts within a transaction are checked in CheckTransaction (bad-txns-inputs-duplicate)
734 : : * - conflicts within a package are checked in IsWellFormedPackage (conflict-in-package)
735 : : * - conflicts with an existing mempool transaction are found in CTxMemPool::GetConflictTx and replacements are allowed
736 : : * The temporary coins should persist between individual transaction checks so that package validation is possible,
737 : : * but must be cleaned up when we finish validating a subpackage, whether accepted or rejected. The cache must also
738 : : * be cleared when mempool contents change (when a changeset is applied or when the mempool trims itself) because it
739 : : * can return cached coins that no longer exist in the backend. Use CleanupTemporaryCoins() anytime you are finished
740 : : * with a SubPackageState or call LimitMempoolSize().
741 : : */
742 : : CCoinsViewCache m_view;
743 : :
744 : : // These are the two possible backends for m_view.
745 : : /** When m_view is connected to m_viewmempool as its backend, it can pull coins from the mempool and from the UTXO
746 : : * set. This is also where temporary coins are stored. */
747 : : CCoinsViewMemPool m_viewmempool;
748 : :
749 : : Chainstate& m_active_chainstate;
750 : :
751 : : // Fields below are per *sub*package state and must be reset prior to subsequent
752 : : // AcceptSingleTransaction and AcceptMultipleTransactions invocations
753 : 5900321 : struct SubPackageState {
754 : : /** Aggregated modified fees of all transactions, used to calculate package feerate. */
755 : : CAmount m_total_modified_fees{0};
756 : : /** Aggregated virtual size of all transactions, used to calculate package feerate. */
757 : : int64_t m_total_vsize{0};
758 : :
759 : : // RBF-related members
760 : : /** Whether the transaction(s) would replace any mempool transactions and/or evict any siblings.
761 : : * If so, RBF rules apply. */
762 : : bool m_rbf{false};
763 : : /** Mempool transactions that were replaced. */
764 : : std::list<CTransactionRef> m_replaced_transactions;
765 : : /* Changeset representing adding transactions and removing their conflicts. */
766 : : std::unique_ptr<CTxMemPool::ChangeSet> m_changeset;
767 : :
768 : : /** Total modified fees of mempool transactions being replaced. */
769 : : CAmount m_conflicting_fees{0};
770 : : /** Total size (in virtual bytes) of mempool transactions being replaced. */
771 : : size_t m_conflicting_size{0};
772 : : };
773 : :
774 : : struct SubPackageState m_subpackage;
775 : :
776 : : /** Re-set sub-package state to not leak between evaluations */
777 : 3344084 : void ClearSubPackageState() EXCLUSIVE_LOCKS_REQUIRED(cs_main, m_pool.cs)
778 : : {
779 : 3344084 : m_subpackage = SubPackageState{};
780 : :
781 : : // And clean coins while at it
782 : 3344084 : CleanupTemporaryCoins();
783 : 3344084 : }
784 : : };
785 : :
786 : 3026613 : bool MemPoolAccept::PreChecks(ATMPArgs& args, Workspace& ws)
787 : : {
788 : 3026613 : AssertLockHeld(cs_main);
789 : 3026613 : AssertLockHeld(m_pool.cs);
790 : 3026613 : const CTransactionRef& ptx = ws.m_ptx;
791 : 3026613 : const CTransaction& tx = *ws.m_ptx;
792 : 3026613 : const Txid& hash = ws.m_hash;
793 : :
794 : : // Copy/alias what we need out of args
795 : 3026613 : const int64_t nAcceptTime = args.m_accept_time;
796 : 3026613 : const bool bypass_limits = args.m_bypass_limits;
797 : 3026613 : std::vector<COutPoint>& coins_to_uncache = args.m_coins_to_uncache;
798 : :
799 : : // Alias what we need out of ws
800 : 3026613 : TxValidationState& state = ws.m_state;
801 : :
802 [ + + ]: 3026613 : if (!CheckTransaction(tx, state)) {
803 : : return false; // state filled in by CheckTransaction
804 : : }
805 : :
806 : : // Coinbase is only valid in a block, not as a loose transaction
807 [ + + ]: 2379217 : if (tx.IsCoinBase())
808 [ + - + - ]: 10367 : return state.Invalid(TxValidationResult::TX_CONSENSUS, "coinbase");
809 : :
810 : : // Rather not work on nonstandard transactions (unless -testnet/-regtest)
811 [ + + ]: 2368850 : std::string reason;
812 [ + + + - : 2368850 : if (m_pool.m_opts.require_standard && !IsStandardTx(tx, m_pool.m_opts.max_datacarrier_bytes, m_pool.m_opts.permit_bare_multisig, m_pool.m_opts.dust_relay_feerate, reason)) {
+ + ]
813 [ + - + - ]: 78898 : return state.Invalid(TxValidationResult::TX_NOT_STANDARD, reason);
814 : : }
815 : :
816 : : // Transactions smaller than 65 non-witness bytes are not relayed to mitigate CVE-2017-12842.
817 [ + + ]: 2289952 : if (::GetSerializeSize(TX_NO_WITNESS(tx)) < MIN_STANDARD_TX_NONWITNESS_SIZE)
818 [ + - + - : 6750 : return state.Invalid(TxValidationResult::TX_NOT_STANDARD, "tx-size-small");
+ - ]
819 : :
820 : : // Only accept nLockTime-using transactions that can be mined in the next
821 : : // block; we don't want our mempool filled up with transactions that can't
822 : : // be mined yet.
823 [ - + - + : 4566404 : if (!CheckFinalTxAtTip(*Assert(m_active_chainstate.m_chain.Tip()), tx)) {
+ - + + ]
824 [ + - + - : 112555 : return state.Invalid(TxValidationResult::TX_PREMATURE_SPEND, "non-final");
+ - ]
825 : : }
826 : :
827 [ + - + + ]: 2170647 : if (m_pool.exists(tx.GetWitnessHash())) {
828 : : // Exact transaction already exists in the mempool.
829 [ + - + - : 97938 : return state.Invalid(TxValidationResult::TX_CONFLICT, "txn-already-in-mempool");
+ - ]
830 [ + - + + ]: 2072709 : } else if (m_pool.exists(tx.GetHash())) {
831 : : // Transaction with the same non-witness data but different witness (same txid, different
832 : : // wtxid) already exists in the mempool.
833 [ + - + - : 1054 : return state.Invalid(TxValidationResult::TX_CONFLICT, "txn-same-nonwitness-data-in-mempool");
+ - ]
834 : : }
835 : :
836 : : // Check for conflicts with in-memory transactions
837 [ + + ]: 12083663 : for (const CTxIn &txin : tx.vin)
838 : : {
839 [ + - ]: 10134892 : const CTransaction* ptxConflicting = m_pool.GetConflictTx(txin.prevout);
840 [ + + ]: 10134892 : if (ptxConflicting) {
841 [ + + ]: 1228735 : if (!args.m_allow_replacement) {
842 : : // Transaction conflicts with a mempool tx, but we're not allowing replacements in this context.
843 [ + - + - : 122884 : return state.Invalid(TxValidationResult::TX_MEMPOOL_POLICY, "bip125-replacement-disallowed");
+ - ]
844 : : }
845 [ + - ]: 1105851 : ws.m_conflicts.insert(ptxConflicting->GetHash());
846 : : }
847 : : }
848 : :
849 [ + - ]: 1948771 : m_view.SetBackend(m_viewmempool);
850 : :
851 [ + - ]: 1948771 : const CCoinsViewCache& coins_cache = m_active_chainstate.CoinsTip();
852 : : // do all inputs exist?
853 [ + + ]: 7380470 : for (const CTxIn& txin : tx.vin) {
854 [ + - + + ]: 5974921 : if (!coins_cache.HaveCoinInCache(txin.prevout)) {
855 [ + - ]: 3120192 : coins_to_uncache.push_back(txin.prevout);
856 : : }
857 : :
858 : : // Note: this call may add txin.prevout to the coins cache
859 : : // (coins_cache.cacheCoins) by way of FetchCoin(). It should be removed
860 : : // later (via coins_to_uncache) if this tx turns out to be invalid.
861 [ + - + + ]: 5974921 : if (!m_view.HaveCoin(txin.prevout)) {
862 : : // Are inputs missing because we already have the tx?
863 [ - + + + ]: 3381486 : for (size_t out = 0; out < tx.vout.size(); out++) {
864 : : // Optimistically just do efficient check of cache for outputs
865 [ + - - + ]: 2838264 : if (coins_cache.HaveCoinInCache(COutPoint(hash, out))) {
866 [ # # # # : 0 : return state.Invalid(TxValidationResult::TX_CONFLICT, "txn-already-known");
# # ]
867 : : }
868 : : }
869 : : // Otherwise assume this might be an orphan tx for which we just haven't seen parents yet
870 [ + - + - : 543222 : return state.Invalid(TxValidationResult::TX_MISSING_INPUTS, "bad-txns-inputs-missingorspent");
+ - ]
871 : : }
872 : : }
873 : :
874 : : // This is const, but calls into `CCoinsViewCache::GetBestBlock()` to refresh
875 : : // the cached best block through `m_viewmempool` after caching inputs.
876 [ + - ]: 1405549 : (void)m_view.GetBestBlock();
877 : :
878 : : // All required inputs are cached now, so switch m_view to the empty backend.
879 : : // This keeps already-fetched cache entries for later checks and prevents new
880 : : // backend lookups (which would avoid coins_to_uncache tracking).
881 [ + - + - ]: 1405549 : m_view.SetBackend(CoinsViewEmpty::Get());
882 : :
883 [ + - + - : 2811098 : assert(m_active_chainstate.m_blockman.LookupBlockIndex(m_view.GetBestBlock()) == m_active_chainstate.m_chain.Tip());
- + - + ]
884 : :
885 : : // Only accept BIP68 sequence locked transactions that can be mined in the next
886 : : // block; we don't want our mempool filled up with transactions that can't
887 : : // be mined yet.
888 : : // Pass in m_view which has all of the relevant inputs cached. Note that, since m_view's
889 : : // backend was removed, it no longer pulls coins from the mempool.
890 [ + - ]: 1405549 : const std::optional<LockPoints> lock_points{CalculateLockPointsAtTip(m_active_chainstate.m_chain.Tip(), m_view, tx)};
891 [ + - - + : 2811098 : if (!lock_points.has_value() || !CheckSequenceLocksAtTip(m_active_chainstate.m_chain.Tip(), *lock_points)) {
+ - + + ]
892 [ + - + - : 67617 : return state.Invalid(TxValidationResult::TX_PREMATURE_SPEND, "non-BIP68-final");
+ - ]
893 : : }
894 : :
895 : : // The mempool holds txs for the next block, so pass height+1 to CheckTxInputs
896 [ - + + - : 1337932 : if (!Consensus::CheckTxInputs(tx, state, m_view, m_active_chainstate.m_chain.Height() + 1, ws.m_base_fees)) {
+ + ]
897 : : return false; // state filled in by CheckTxInputs
898 : : }
899 : :
900 [ + + ]: 1321593 : if (m_pool.m_opts.require_standard) {
901 [ + - ]: 1957576 : state = ValidateInputsStandardness(tx, m_view);
902 [ + + ]: 978788 : if (state.IsInvalid()) {
903 : : return false;
904 : : }
905 : : }
906 : :
907 : : // Check for non-standard witnesses.
908 [ + + + + : 1321248 : if (tx.HasWitness() && m_pool.m_opts.require_standard && !IsWitnessStandard(tx, m_view)) {
+ - + + ]
909 [ + - + - : 7453 : return state.Invalid(TxValidationResult::TX_WITNESS_MUTATED, "bad-witness-nonstandard");
+ - ]
910 : : }
911 : :
912 [ + - ]: 1313795 : int64_t nSigOpsCost = GetTransactionSigOpCost(tx, m_view, STANDARD_SCRIPT_VERIFY_FLAGS);
913 : :
914 : : // Keep track of transactions that spend a coinbase, which we re-scan
915 : : // during reorgs to ensure COINBASE_MATURITY is still met.
916 : 1313795 : bool fSpendsCoinbase = false;
917 [ + + ]: 2361645 : for (const CTxIn &txin : tx.vin) {
918 [ + - ]: 1889611 : const Coin &coin = m_view.AccessCoin(txin.prevout);
919 [ + + ]: 1889611 : if (coin.IsCoinBase()) {
920 : : fSpendsCoinbase = true;
921 : : break;
922 : : }
923 : : }
924 : :
925 : : // Set entry_sequence to 0 when bypass_limits is used; this allows txs from a block
926 : : // reorg to be marked earlier than any child txs that were already in the mempool.
927 [ + + ]: 1313795 : const uint64_t entry_sequence = bypass_limits ? 0 : m_pool.GetSequence();
928 [ + + ]: 1313795 : if (!m_subpackage.m_changeset) {
929 [ + - ]: 1205810 : m_subpackage.m_changeset = m_pool.GetChangeSet();
930 : : }
931 [ + - - + : 1313795 : ws.m_tx_handle = m_subpackage.m_changeset->StageAddition(ptx, ws.m_base_fees, nAcceptTime, m_active_chainstate.m_chain.Height(), entry_sequence, fSpendsCoinbase, nSigOpsCost, lock_points.value());
+ - ]
932 : :
933 : : // ws.m_modified_fees includes any fee deltas from PrioritiseTransaction
934 [ + - ]: 1313795 : ws.m_modified_fees = ws.m_tx_handle->GetModifiedFee();
935 : :
936 [ + - ]: 1313795 : ws.m_vsize = ws.m_tx_handle->GetTxSize();
937 : :
938 : : // Enforces 0-fee for dust transactions, no incentive to be mined alone
939 [ + + ]: 1313795 : if (m_pool.m_opts.require_standard) {
940 [ + - + + ]: 970990 : if (!PreCheckEphemeralTx(*ptx, m_pool.m_opts.dust_relay_feerate, ws.m_base_fees, ws.m_modified_fees, state)) {
941 : : return false; // state filled in by PreCheckEphemeralTx
942 : : }
943 : : }
944 : :
945 [ + + ]: 1130478 : if (nSigOpsCost > MAX_STANDARD_TX_SIGOPS_COST)
946 [ + - + - ]: 92 : return state.Invalid(TxValidationResult::TX_NOT_STANDARD, "bad-txns-too-many-sigops",
947 [ + - ]: 184 : strprintf("%d", nSigOpsCost));
948 : :
949 : : // No individual transactions are allowed below the mempool min feerate except from disconnected
950 : : // blocks and transactions in a package. Package transactions will be checked using package
951 : : // feerate later.
952 [ + + + + : 1130386 : if (!bypass_limits && !args.m_package_feerates && !CheckFeeRate(ws.m_vsize, ws.m_modified_fees, state)) return false;
+ - + + ]
953 : :
954 [ + - ]: 1024336 : ws.m_iters_conflicting = m_pool.GetIterSet(ws.m_conflicts);
955 : :
956 [ + - ]: 1024336 : ws.m_parents = m_pool.GetParents(*ws.m_tx_handle);
957 : :
958 [ + + ]: 1024336 : if (!args.m_bypass_limits) {
959 : : // Perform the TRUC checks, using the in-mempool parents.
960 [ + - + + ]: 848909 : if (const auto err{SingleTRUCChecks(m_pool, ws.m_ptx, ws.m_parents, ws.m_conflicts, ws.m_vsize)}) {
961 : : // Single transaction contexts only.
962 [ + + + + ]: 26309 : if (args.m_allow_sibling_eviction && err->second != nullptr) {
963 : : // We should only be considering where replacement is considered valid as well.
964 [ - + ]: 3039 : Assume(args.m_allow_replacement);
965 : : // Potential sibling eviction. Add the sibling to our list of mempool conflicts to be
966 : : // included in RBF checks.
967 [ + - ]: 3039 : ws.m_conflicts.insert(err->second->GetHash());
968 : : // Adding the sibling to m_iters_conflicting here means that it doesn't count towards
969 : : // RBF Carve Out above. This is correct, since removing to-be-replaced transactions from
970 : : // the descendant count is done separately in SingleTRUCChecks for TRUC transactions.
971 [ + - + - ]: 6078 : ws.m_iters_conflicting.insert(m_pool.GetIter(err->second->GetHash()).value());
972 : 3039 : ws.m_sibling_eviction = true;
973 : : // The sibling will be treated as part of the to-be-replaced set in ReplacementChecks.
974 : : // Note that we are not checking whether it opts in to replaceability via BIP125 or TRUC
975 : : // (which is normally done in PreChecks). However, the only way a TRUC transaction can
976 : : // have a non-TRUC and non-BIP125 descendant is due to a reorg.
977 : : } else {
978 [ + - + - ]: 23270 : return state.Invalid(TxValidationResult::TX_MEMPOOL_POLICY, "TRUC-violation", err->first);
979 : : }
980 : 848909 : }
981 : : }
982 : :
983 : : // We want to detect conflicts in any tx in a package to trigger package RBF logic
984 : 1001066 : m_subpackage.m_rbf |= !ws.m_conflicts.empty();
985 : 1001066 : return true;
986 : 2368850 : }
987 : :
988 : 344116 : bool MemPoolAccept::ReplacementChecks(Workspace& ws)
989 : : {
990 : 344116 : AssertLockHeld(cs_main);
991 : 344116 : AssertLockHeld(m_pool.cs);
992 : :
993 : 344116 : const CTransaction& tx = *ws.m_ptx;
994 : 344116 : const Txid& hash = ws.m_hash;
995 : 344116 : TxValidationState& state = ws.m_state;
996 : :
997 : 344116 : CFeeRate newFeeRate(ws.m_modified_fees, ws.m_vsize);
998 : :
999 [ + - ]: 344116 : CTxMemPool::setEntries all_conflicts;
1000 : :
1001 : : // Calculate all conflicting entries and enforce Rule #5.
1002 [ + - - + ]: 344116 : if (const auto err_string{GetEntriesForConflicts(tx, m_pool, ws.m_iters_conflicting, all_conflicts)}) {
1003 [ # # # # ]: 0 : return state.Invalid(TxValidationResult::TX_MEMPOOL_POLICY,
1004 [ # # # # ]: 0 : strprintf("too many potential replacements%s", ws.m_sibling_eviction ? " (including sibling eviction)" : ""), *err_string);
1005 : 0 : }
1006 : :
1007 : : // Check if it's economically rational to mine this transaction rather than the ones it
1008 : : // replaces and pays for its own relay fees. Enforce Rules #3 and #4.
1009 [ + + ]: 1167206 : for (CTxMemPool::txiter it : all_conflicts) {
1010 [ + - ]: 823090 : m_subpackage.m_conflicting_fees += it->GetModifiedFee();
1011 [ + - ]: 823090 : m_subpackage.m_conflicting_size += it->GetTxSize();
1012 : : }
1013 : :
1014 : 688232 : if (const auto err_string{PaysForRBF(m_subpackage.m_conflicting_fees, ws.m_modified_fees, ws.m_vsize,
1015 [ + - + + ]: 344116 : m_pool.m_opts.incremental_relay_feerate, hash)}) {
1016 : : // Result may change in a package context
1017 [ + + + - ]: 521046 : return state.Invalid(TxValidationResult::TX_RECONSIDERABLE,
1018 [ + + + - ]: 779584 : strprintf("insufficient fee%s", ws.m_sibling_eviction ? " (including sibling eviction)" : ""), *err_string);
1019 : 260523 : }
1020 : :
1021 : : // Add all the to-be-removed transactions to the changeset.
1022 [ + + ]: 262656 : for (auto it : all_conflicts) {
1023 [ + - ]: 179063 : m_subpackage.m_changeset->StageRemoval(it);
1024 : : }
1025 : :
1026 : : // Run cluster size limit checks and fail if we exceed them.
1027 [ + - + + ]: 83593 : if (!m_subpackage.m_changeset->CheckMemPoolPolicyLimits()) {
1028 [ + - + - : 1725 : return state.Invalid(TxValidationResult::TX_MEMPOOL_POLICY, "too-large-cluster", "");
+ - ]
1029 : : }
1030 : :
1031 [ + - + + ]: 81868 : if (const auto err_string{ImprovesFeerateDiagram(*m_subpackage.m_changeset)}) {
1032 : : // We checked above for the cluster size limits being respected, so a
1033 : : // failure here can only be due to an insufficient fee.
1034 [ - + ]: 23845 : Assume(err_string->first == DiagramCheckError::FAILURE);
1035 [ + - + - ]: 23845 : return state.Invalid(TxValidationResult::TX_RECONSIDERABLE, "replacement-failed", err_string->second);
1036 : 23845 : }
1037 : :
1038 : 58023 : return true;
1039 : 344116 : }
1040 : :
1041 : 48332 : bool MemPoolAccept::PackageRBFChecks(const std::vector<CTransactionRef>& txns,
1042 : : std::vector<Workspace>& workspaces,
1043 : : const int64_t total_vsize,
1044 : : PackageValidationState& package_state)
1045 : : {
1046 : 48332 : AssertLockHeld(cs_main);
1047 : 48332 : AssertLockHeld(m_pool.cs);
1048 : :
1049 [ - + ]: 156441 : assert(std::all_of(txns.cbegin(), txns.cend(), [this](const auto& tx)
1050 : : { return !m_pool.exists(tx->GetHash());}));
1051 : :
1052 [ - + - + : 48332 : assert(txns.size() == workspaces.size());
- + ]
1053 : :
1054 : : // We're in package RBF context; replacement proposal must be size 2
1055 [ + + + - ]: 48332 : if (workspaces.size() != 2 || !Assume(IsChildWithParents(txns))) {
1056 [ + - + - ]: 10238 : return package_state.Invalid(PackageValidationResult::PCKG_POLICY, "package RBF failed: package must be 1-parent-1-child");
1057 : : }
1058 : :
1059 : : // If the package has in-mempool parents, we won't consider a package RBF
1060 : : // since it would result in a cluster larger than 2.
1061 : : // N.B. To relax this constraint we will need to revisit how CCoinsViewMemPool::PackageAddTransaction
1062 : : // is being used inside AcceptMultipleTransactions to track available inputs while processing a package.
1063 : : // Specifically we would need to check that the ancestors of the new
1064 : : // transactions don't intersect with the set of transactions to be removed
1065 : : // due to RBF, which is not checked at all in the package acceptance
1066 : : // context.
1067 [ + + ]: 68093 : for (const auto& ws : workspaces) {
1068 [ + + ]: 56399 : if (!ws.m_parents.empty()) {
1069 [ + - + - ]: 26400 : return package_state.Invalid(PackageValidationResult::PCKG_POLICY, "package RBF failed: new transaction cannot have mempool ancestors");
1070 : : }
1071 : : }
1072 : :
1073 : : // Aggregate all conflicts into one set.
1074 : 11694 : CTxMemPool::setEntries direct_conflict_iters;
1075 [ + + ]: 35082 : for (Workspace& ws : workspaces) {
1076 : : // Aggregate all conflicts into one set.
1077 : 23388 : direct_conflict_iters.merge(ws.m_iters_conflicting);
1078 : : }
1079 : :
1080 [ + - ]: 11694 : const auto& parent_ws = workspaces[0];
1081 : 11694 : const auto& child_ws = workspaces[1];
1082 : :
1083 : : // Don't consider replacements that would cause us to remove a large number of mempool entries.
1084 : : // This limit is not increased in a package RBF. Use the aggregate number of transactions.
1085 [ + - ]: 11694 : CTxMemPool::setEntries all_conflicts;
1086 : 23388 : if (const auto err_string{GetEntriesForConflicts(*child_ws.m_ptx, m_pool, direct_conflict_iters,
1087 [ + - - + ]: 11694 : all_conflicts)}) {
1088 [ # # # # ]: 0 : return package_state.Invalid(PackageValidationResult::PCKG_POLICY,
1089 [ # # ]: 0 : "package RBF failed: too many potential replacements", *err_string);
1090 : 0 : }
1091 : :
1092 [ + + ]: 36990 : for (CTxMemPool::txiter it : all_conflicts) {
1093 [ + - ]: 25296 : m_subpackage.m_changeset->StageRemoval(it);
1094 [ + - ]: 25296 : m_subpackage.m_conflicting_fees += it->GetModifiedFee();
1095 [ + - ]: 25296 : m_subpackage.m_conflicting_size += it->GetTxSize();
1096 : : }
1097 : :
1098 : : // Use the child as the transaction for attributing errors to.
1099 [ + - ]: 11694 : const Txid& child_hash = child_ws.m_ptx->GetHash();
1100 : 23388 : if (const auto err_string{PaysForRBF(/*original_fees=*/m_subpackage.m_conflicting_fees,
1101 : : /*replacement_fees=*/m_subpackage.m_total_modified_fees,
1102 : 11694 : /*replacement_vsize=*/m_subpackage.m_total_vsize,
1103 [ + - + + ]: 11694 : m_pool.m_opts.incremental_relay_feerate, child_hash)}) {
1104 [ + - + - ]: 8661 : return package_state.Invalid(PackageValidationResult::PCKG_POLICY,
1105 [ + - ]: 17322 : "package RBF failed: insufficient anti-DoS fees", *err_string);
1106 : 8661 : }
1107 : :
1108 : : // Ensure this two transaction package is a "chunk" on its own; we don't want the child
1109 : : // to be only paying anti-DoS fees
1110 [ + - ]: 3033 : const CFeeRate parent_feerate(parent_ws.m_modified_fees, parent_ws.m_vsize);
1111 [ + - ]: 3033 : const CFeeRate package_feerate(m_subpackage.m_total_modified_fees, m_subpackage.m_total_vsize);
1112 [ + + ]: 3033 : if (package_feerate <= parent_feerate) {
1113 [ + - ]: 1246 : return package_state.Invalid(PackageValidationResult::PCKG_POLICY,
1114 [ + - ]: 2492 : "package RBF failed: package feerate is less than or equal to parent feerate",
1115 [ + - + - : 2492 : strprintf("package feerate %s <= parent feerate is %s", package_feerate.ToString(), parent_feerate.ToString()));
+ - ]
1116 : : }
1117 : :
1118 : : // Run cluster size limit checks and fail if we exceed them.
1119 [ + - - + ]: 1787 : if (!m_subpackage.m_changeset->CheckMemPoolPolicyLimits()) {
1120 [ # # # # : 0 : return package_state.Invalid(PackageValidationResult::PCKG_POLICY, "too-large-cluster", "");
# # ]
1121 : : }
1122 : :
1123 : : // Check if it's economically rational to mine this package rather than the ones it replaces.
1124 [ + - + + ]: 1787 : if (const auto err_tup{ImprovesFeerateDiagram(*m_subpackage.m_changeset)}) {
1125 [ - + ]: 839 : Assume(err_tup->first == DiagramCheckError::FAILURE);
1126 [ + - ]: 839 : return package_state.Invalid(PackageValidationResult::PCKG_POLICY,
1127 [ + - + - ]: 2517 : "package RBF failed: " + err_tup.value().second, "");
1128 : 839 : }
1129 : :
1130 [ + - - + : 948 : LogDebug(BCLog::TXPACKAGES, "package RBF checks passed: parent %s (wtxid=%s), child %s (wtxid=%s), package hash (%s)\n",
- - - - -
- - - - -
- - - - ]
1131 : : txns.front()->GetHash().ToString(), txns.front()->GetWitnessHash().ToString(),
1132 : : txns.back()->GetHash().ToString(), txns.back()->GetWitnessHash().ToString(),
1133 : : GetPackageHash(txns).ToString());
1134 : :
1135 : :
1136 : : return true;
1137 : 11694 : }
1138 : :
1139 : 532176 : bool MemPoolAccept::PolicyScriptChecks(const ATMPArgs& args, Workspace& ws)
1140 : : {
1141 : 532176 : AssertLockHeld(cs_main);
1142 : 532176 : AssertLockHeld(m_pool.cs);
1143 : 532176 : const CTransaction& tx = *ws.m_ptx;
1144 : 532176 : TxValidationState& state = ws.m_state;
1145 : :
1146 : 532176 : constexpr script_verify_flags scriptVerifyFlags = STANDARD_SCRIPT_VERIFY_FLAGS;
1147 : :
1148 : : // Check input scripts and signatures.
1149 : : // This is done last to help prevent CPU exhaustion denial-of-service attacks.
1150 [ + + ]: 532176 : if (!CheckInputScripts(tx, state, m_view, scriptVerifyFlags, true, false, ws.m_precomputed_txdata, GetValidationCache())) {
1151 : : // Detect a failure due to a missing witness so that p2p code can handle rejection caching appropriately.
1152 [ + + + + ]: 89085 : if (!tx.HasWitness() && SpendsNonAnchorWitnessProg(tx, m_view)) {
1153 : 44282 : state.Invalid(TxValidationResult::TX_WITNESS_STRIPPED,
1154 [ - + - + : 88564 : state.GetRejectReason(), state.GetDebugMessage());
+ - ]
1155 : : }
1156 : 89085 : return false; // state filled in by CheckInputScripts
1157 : : }
1158 : :
1159 : : return true;
1160 : : }
1161 : :
1162 : 387296 : bool MemPoolAccept::ConsensusScriptChecks(const ATMPArgs& args, Workspace& ws)
1163 : : {
1164 : 387296 : AssertLockHeld(cs_main);
1165 : 387296 : AssertLockHeld(m_pool.cs);
1166 [ - + ]: 387296 : const CTransaction& tx = *ws.m_ptx;
1167 : 387296 : const Txid& hash = ws.m_hash;
1168 : 387296 : TxValidationState& state = ws.m_state;
1169 : :
1170 : : // Check again against the current block tip's script verification
1171 : : // flags to cache our script execution flags. This is, of course,
1172 : : // useless if the next block has different script flags from the
1173 : : // previous one, but because the cache tracks script flags for us it
1174 : : // will auto-invalidate and we'll just have a few blocks of extra
1175 : : // misses on soft-fork activation.
1176 : : //
1177 : : // This is also useful in case of bugs in the standard flags that cause
1178 : : // transactions to pass as valid when they're actually invalid. For
1179 : : // instance the STRICTENC flag was incorrectly allowing certain
1180 : : // CHECKSIG NOT scripts to pass, even though they were invalid.
1181 : : //
1182 : : // There is a similar check in CreateNewBlock() to prevent creating
1183 : : // invalid blocks (using TestBlockValidity), however allowing such
1184 : : // transactions into the mempool can be exploited as a DoS attack.
1185 [ - + ]: 774592 : script_verify_flags currentBlockScriptVerifyFlags{GetBlockScriptFlags(*m_active_chainstate.m_chain.Tip(), m_active_chainstate.m_chainman)};
1186 [ - + ]: 774592 : if (!CheckInputsFromMempoolAndCache(tx, state, m_view, m_pool, currentBlockScriptVerifyFlags,
1187 : 387296 : ws.m_precomputed_txdata, m_active_chainstate.CoinsTip(), GetValidationCache())) {
1188 [ # # # # ]: 0 : LogError("BUG! PLEASE REPORT THIS! CheckInputScripts failed against latest-block but not STANDARD flags %s, %s", hash.ToString(), state.ToString());
1189 : 0 : return Assume(false);
1190 : : }
1191 : :
1192 : : return true;
1193 : : }
1194 : :
1195 : 372813 : void MemPoolAccept::FinalizeSubpackage(const ATMPArgs& args)
1196 : : {
1197 : 372813 : AssertLockHeld(cs_main);
1198 : 372813 : AssertLockHeld(m_pool.cs);
1199 : :
1200 [ + + - + ]: 372813 : if (!m_subpackage.m_changeset->GetRemovals().empty()) Assume(args.m_allow_replacement);
1201 : : // Remove conflicting transactions from the mempool
1202 [ + + ]: 421978 : for (CTxMemPool::txiter it : m_subpackage.m_changeset->GetRemovals())
1203 : : {
1204 : 49165 : std::string log_string = strprintf("replacing mempool tx %s (wtxid=%s, fees=%s, vsize=%s). ",
1205 [ + - ]: 98330 : it->GetTx().GetHash().ToString(),
1206 [ + - ]: 49165 : it->GetTx().GetWitnessHash().ToString(),
1207 : 49165 : it->GetFee(),
1208 [ + - ]: 98330 : it->GetTxSize());
1209 [ - + ]: 49165 : FeeFrac feerate{m_subpackage.m_total_modified_fees, int32_t(m_subpackage.m_total_vsize)};
1210 : 49165 : uint256 tx_or_package_hash{};
1211 [ - + ]: 49165 : const bool replaced_with_tx{m_subpackage.m_changeset->GetTxCount() == 1};
1212 [ + + ]: 49165 : if (replaced_with_tx) {
1213 [ + - ]: 47153 : const CTransaction& tx = m_subpackage.m_changeset->GetAddedTxn(0);
1214 : 47153 : tx_or_package_hash = tx.GetHash().ToUint256();
1215 : 47153 : log_string += strprintf("New tx %s (wtxid=%s, fees=%s, vsize=%s)",
1216 [ + - ]: 94306 : tx.GetHash().ToString(),
1217 [ + - + - ]: 94306 : tx.GetWitnessHash().ToString(),
1218 : : feerate.fee,
1219 : 47153 : feerate.size);
1220 : : } else {
1221 [ + - + - ]: 2012 : tx_or_package_hash = GetPackageHash(m_subpackage.m_changeset->GetAddedTxns());
1222 [ + - ]: 4024 : log_string += strprintf("New package %s with %lu txs, fees=%s, vsize=%s",
1223 : 2012 : tx_or_package_hash.ToString(),
1224 [ - + + - ]: 2012 : m_subpackage.m_changeset->GetTxCount(),
1225 : : feerate.fee,
1226 : 2012 : feerate.size);
1227 : :
1228 : : }
1229 [ + - - + : 49165 : LogDebug(BCLog::MEMPOOL, "%s\n", log_string);
- - ]
1230 : : TRACEPOINT(mempool, replaced,
1231 : : it->GetTx().GetHash().data(),
1232 : : it->GetTxSize(),
1233 : : it->GetFee(),
1234 : : std::chrono::duration_cast<std::chrono::duration<std::uint64_t>>(it->GetTime()).count(),
1235 : : tx_or_package_hash.data(),
1236 : : feerate.size,
1237 : : feerate.fee,
1238 : : replaced_with_tx
1239 : 49165 : );
1240 [ + - + - ]: 147495 : m_subpackage.m_replaced_transactions.push_back(it->GetSharedTx());
1241 : 49165 : }
1242 : 372813 : m_subpackage.m_changeset->Apply();
1243 [ + - ]: 372813 : m_subpackage.m_changeset.reset();
1244 : 372813 : }
1245 : :
1246 : 3010 : bool MemPoolAccept::SubmitPackage(const ATMPArgs& args, std::vector<Workspace>& workspaces,
1247 : : PackageValidationState& package_state,
1248 : : std::map<Wtxid, MempoolAcceptResult>& results)
1249 : : {
1250 : 3010 : AssertLockHeld(cs_main);
1251 : 3010 : AssertLockHeld(m_pool.cs);
1252 : : // Sanity check: none of the transactions should be in the mempool, and none of the transactions
1253 : : // should have a same-txid-different-witness equivalent in the mempool.
1254 [ - + ]: 11058 : assert(std::all_of(workspaces.cbegin(), workspaces.cend(), [this](const auto& ws) { return !m_pool.exists(ws.m_ptx->GetHash()); }));
1255 : :
1256 : 3010 : bool all_submitted = true;
1257 : 3010 : FinalizeSubpackage(args);
1258 : : // ConsensusScriptChecks adds to the script cache and is therefore consensus-critical;
1259 : : // CheckInputsFromMempoolAndCache asserts that transactions only spend coins available from the
1260 : : // mempool or UTXO set. Submit each transaction to the mempool immediately after calling
1261 : : // ConsensusScriptChecks to make the outputs available for subsequent transactions.
1262 [ + + ]: 11058 : for (Workspace& ws : workspaces) {
1263 [ - + ]: 8048 : if (!ConsensusScriptChecks(args, ws)) {
1264 [ # # # # ]: 0 : results.emplace(ws.m_ptx->GetWitnessHash(), MempoolAcceptResult::Failure(ws.m_state));
1265 : : // Since PolicyScriptChecks() passed, this should never fail.
1266 : 0 : Assume(false);
1267 : 0 : all_submitted = false;
1268 [ # # ]: 0 : package_state.Invalid(PackageValidationResult::PCKG_MEMPOOL_ERROR,
1269 : 0 : strprintf("BUG! PolicyScriptChecks succeeded but ConsensusScriptChecks failed: %s",
1270 [ # # # # ]: 0 : ws.m_ptx->GetHash().ToString()));
1271 : : }
1272 : : // Remove first failing tx and all subsequent in package
1273 [ - + ]: 8048 : if (!all_submitted) {
1274 [ # # ]: 0 : if (!m_subpackage.m_changeset) m_subpackage.m_changeset = m_pool.GetChangeSet();
1275 [ # # ]: 0 : m_subpackage.m_changeset->StageRemoval(m_pool.GetIter(ws.m_ptx->GetHash()).value());
1276 : : }
1277 : : }
1278 [ - + ]: 3010 : if (!all_submitted) {
1279 [ # # ]: 0 : Assume(m_subpackage.m_changeset);
1280 : : // This code should be unreachable; it's here as belt-and-suspenders
1281 : : // to try to ensure we have no consensus-invalid transactions in the
1282 : : // mempool.
1283 : 0 : m_subpackage.m_changeset->Apply();
1284 [ # # ]: 0 : m_subpackage.m_changeset.reset();
1285 : 0 : return false;
1286 : : }
1287 : :
1288 : 3010 : std::vector<Wtxid> all_package_wtxids;
1289 [ - + + - ]: 3010 : all_package_wtxids.reserve(workspaces.size());
1290 [ + - ]: 3010 : std::transform(workspaces.cbegin(), workspaces.cend(), std::back_inserter(all_package_wtxids),
1291 : 8048 : [](const auto& ws) { return ws.m_ptx->GetWitnessHash(); });
1292 : :
1293 [ + + ]: 3010 : if (!m_subpackage.m_replaced_transactions.empty()) {
1294 [ + - - + : 938 : LogDebug(BCLog::MEMPOOL, "replaced %u mempool transactions with %u new one(s) for %s additional fees, %d delta bytes\n",
- - - - ]
1295 : : m_subpackage.m_replaced_transactions.size(), workspaces.size(),
1296 : : m_subpackage.m_total_modified_fees - m_subpackage.m_conflicting_fees,
1297 : : m_subpackage.m_total_vsize - static_cast<int>(m_subpackage.m_conflicting_size));
1298 : : }
1299 : :
1300 : : // Add successful results. The returned results may change later if LimitMempoolSize() evicts them.
1301 [ + + ]: 11058 : for (Workspace& ws : workspaces) {
1302 [ + - ]: 8048 : auto iter = m_pool.GetIter(ws.m_ptx->GetHash());
1303 [ - + ]: 8048 : Assume(iter.has_value());
1304 [ + - ]: 8048 : const auto effective_feerate = args.m_package_feerates ? ws.m_package_feerate :
1305 [ - - ]: 8048 : CFeeRate{ws.m_modified_fees, static_cast<int32_t>(ws.m_vsize)};
1306 [ + - ]: 8048 : const auto effective_feerate_wtxids = args.m_package_feerates ? all_package_wtxids :
1307 [ + - - - ]: 8048 : std::vector<Wtxid>{ws.m_ptx->GetWitnessHash()};
1308 : 16096 : results.emplace(ws.m_ptx->GetWitnessHash(),
1309 [ + - + - ]: 8048 : MempoolAcceptResult::Success(std::move(m_subpackage.m_replaced_transactions), ws.m_vsize,
1310 : : ws.m_base_fees, effective_feerate, effective_feerate_wtxids));
1311 [ - + ]: 8048 : if (!m_pool.m_opts.signals) continue;
1312 [ + - ]: 8048 : const CTransaction& tx = *ws.m_ptx;
1313 [ + - ]: 8048 : const auto tx_info = NewMempoolTransactionInfo(ws.m_ptx, ws.m_base_fees,
1314 [ + - ]: 8048 : ws.m_vsize, (*iter)->GetHeight(),
1315 : 8048 : args.m_bypass_limits, args.m_package_submission,
1316 : 8048 : IsCurrentForFeeEstimation(m_active_chainstate),
1317 [ + - + - ]: 16096 : m_pool.HasNoInputsOf(tx));
1318 [ + - ]: 8048 : m_pool.m_opts.signals->TransactionAddedToMempool(tx_info, m_pool.GetAndIncrementSequence());
1319 : 8048 : }
1320 : 3010 : return all_submitted;
1321 : 3010 : }
1322 : :
1323 : 2575765 : MempoolAcceptResult MemPoolAccept::AcceptSingleTransactionInternal(const CTransactionRef& ptx, ATMPArgs& args)
1324 : : {
1325 : 2575765 : AssertLockHeld(cs_main);
1326 : 2575765 : AssertLockHeld(m_pool.cs);
1327 : :
1328 : 2575765 : Workspace ws(ptx);
1329 [ + - ]: 2575765 : const std::vector<Wtxid> single_wtxid{ws.m_ptx->GetWitnessHash()};
1330 : :
1331 [ + - + + ]: 2575765 : if (!PreChecks(args, ws)) {
1332 [ + + ]: 1800600 : if (ws.m_state.GetResult() == TxValidationResult::TX_RECONSIDERABLE) {
1333 : : // Failed for fee reasons. Provide the effective feerate and which tx was included.
1334 [ + - + - ]: 296463 : return MempoolAcceptResult::FeeFailure(ws.m_state, CFeeRate(ws.m_modified_fees, ws.m_vsize), single_wtxid);
1335 : : }
1336 [ + - + - ]: 3403558 : return MempoolAcceptResult::Failure(ws.m_state);
1337 : : }
1338 : :
1339 [ + + + - : 775165 : if (m_subpackage.m_rbf && !ReplacementChecks(ws)) {
+ + ]
1340 [ + + ]: 286093 : if (ws.m_state.GetResult() == TxValidationResult::TX_RECONSIDERABLE) {
1341 : : // Failed for incentives-based fee reasons. Provide the effective feerate and which tx was included.
1342 [ + - + - ]: 853104 : return MempoolAcceptResult::FeeFailure(ws.m_state, CFeeRate(ws.m_modified_fees, ws.m_vsize), single_wtxid);
1343 : : }
1344 [ + - + - ]: 3450 : return MempoolAcceptResult::Failure(ws.m_state);
1345 : : }
1346 : :
1347 : : // Check if the transaction would exceed the cluster size limit.
1348 [ + - + + ]: 489072 : if (!m_subpackage.m_changeset->CheckMemPoolPolicyLimits()) {
1349 [ + - + - : 11922 : ws.m_state.Invalid(TxValidationResult::TX_MEMPOOL_POLICY, "too-large-cluster", "");
+ - ]
1350 [ + - + - ]: 11922 : return MempoolAcceptResult::Failure(ws.m_state);
1351 : : }
1352 : :
1353 : : // Now that we've verified the cluster limit is respected, we can perform
1354 : : // calculations involving the full ancestors of the tx.
1355 [ + + ]: 483111 : if (ws.m_conflicts.size()) {
1356 [ + - ]: 58023 : auto ancestors = m_subpackage.m_changeset->CalculateMemPoolAncestors(ws.m_tx_handle);
1357 : :
1358 : : // A transaction that spends outputs that would be replaced by it is invalid. Now
1359 : : // that we have the set of all ancestors we can detect this
1360 : : // pathological case by making sure ws.m_conflicts and this tx's ancestors don't
1361 : : // intersect.
1362 [ + - + + ]: 58023 : if (const auto err_string{EntriesAndTxidsDisjoint(ancestors, ws.m_conflicts, ptx->GetHash())}) {
1363 : : // We classify this as a consensus error because a transaction depending on something it
1364 : : // conflicts with would be inconsistent.
1365 [ + - + - ]: 6579 : ws.m_state.Invalid(TxValidationResult::TX_CONSENSUS, "bad-txns-spends-conflicting-tx", *err_string);
1366 [ + - + - ]: 13158 : return MempoolAcceptResult::Failure(ws.m_state);
1367 : 58023 : }
1368 : 58023 : }
1369 : :
1370 : 476532 : m_subpackage.m_total_vsize = ws.m_vsize;
1371 : 476532 : m_subpackage.m_total_modified_fees = ws.m_modified_fees;
1372 : :
1373 : : // Individual modified feerate exceeded caller-defined max; abort
1374 [ + + + - : 476532 : if (args.m_client_maxfeerate && CFeeRate(ws.m_modified_fees, ws.m_vsize) > args.m_client_maxfeerate.value()) {
+ + ]
1375 [ + - + - : 14708 : ws.m_state.Invalid(TxValidationResult::TX_MEMPOOL_POLICY, "max feerate exceeded", "");
+ - ]
1376 [ + - + - ]: 14708 : return MempoolAcceptResult::Failure(ws.m_state);
1377 : : }
1378 : :
1379 [ + + + + ]: 469178 : if (!args.m_bypass_limits && m_pool.m_opts.require_standard) {
1380 [ + - ]: 204499 : Wtxid dummy_wtxid;
1381 [ + - + + : 408998 : if (!CheckEphemeralSpends(/*package=*/{ptx}, m_pool.m_opts.dust_relay_feerate, m_pool, ws.m_state, dummy_wtxid)) {
+ - + + -
- - - ]
1382 [ + - + - ]: 5104 : return MempoolAcceptResult::Failure(ws.m_state);
1383 : : }
1384 : : }
1385 : :
1386 : : // Perform the inexpensive checks first and avoid hashing and signature verification unless
1387 : : // those checks pass, to mitigate CPU exhaustion denial-of-service attacks.
1388 [ + - + + : 554004 : if (!PolicyScriptChecks(args, ws)) return MempoolAcceptResult::Failure(ws.m_state);
+ - + - ]
1389 : :
1390 [ + - - + : 379248 : if (!ConsensusScriptChecks(args, ws)) return MempoolAcceptResult::Failure(ws.m_state);
- - - - ]
1391 : :
1392 [ + - ]: 379248 : const CFeeRate effective_feerate{ws.m_modified_fees, static_cast<int32_t>(ws.m_vsize)};
1393 : : // Tx was accepted, but not added
1394 [ + + ]: 379248 : if (args.m_test_accept) {
1395 : 9445 : return MempoolAcceptResult::Success(std::move(m_subpackage.m_replaced_transactions), ws.m_vsize,
1396 [ + - ]: 9445 : ws.m_base_fees, effective_feerate, single_wtxid);
1397 : : }
1398 : :
1399 [ + - ]: 369803 : FinalizeSubpackage(args);
1400 : :
1401 : : // Limit the mempool, if appropriate.
1402 [ + + + + ]: 369803 : if (!args.m_package_submission && !args.m_bypass_limits) {
1403 [ + - + - ]: 97194 : LimitMempoolSize(m_pool, m_active_chainstate.CoinsTip());
1404 : : // If mempool contents change, then the m_view cache is dirty. Given this isn't a package
1405 : : // submission, we won't be using the cache anymore, but clear it anyway for clarity.
1406 [ + - ]: 97194 : CleanupTemporaryCoins();
1407 : :
1408 [ + - + + ]: 97194 : if (!m_pool.exists(ws.m_hash)) {
1409 : : // The tx no longer meets our (new) mempool minimum feerate but could be reconsidered in a package.
1410 [ + - + - : 14874 : ws.m_state.Invalid(TxValidationResult::TX_RECONSIDERABLE, "mempool full");
+ - ]
1411 [ + - + - : 22311 : return MempoolAcceptResult::FeeFailure(ws.m_state, CFeeRate(ws.m_modified_fees, ws.m_vsize), {ws.m_ptx->GetWitnessHash()});
+ - ]
1412 : : }
1413 : : }
1414 : :
1415 [ + - ]: 362366 : if (m_pool.m_opts.signals) {
1416 [ + - ]: 362366 : const CTransaction& tx = *ws.m_ptx;
1417 [ + - ]: 362366 : auto iter = m_pool.GetIter(tx.GetHash());
1418 [ - + ]: 362366 : Assume(iter.has_value());
1419 : 362366 : const auto tx_info = NewMempoolTransactionInfo(ws.m_ptx, ws.m_base_fees,
1420 [ + - ]: 362366 : ws.m_vsize, (*iter)->GetHeight(),
1421 : 362366 : args.m_bypass_limits, args.m_package_submission,
1422 : 362366 : IsCurrentForFeeEstimation(m_active_chainstate),
1423 [ + - + - ]: 724732 : m_pool.HasNoInputsOf(tx));
1424 [ + - ]: 362366 : m_pool.m_opts.signals->TransactionAddedToMempool(tx_info, m_pool.GetAndIncrementSequence());
1425 : 362366 : }
1426 : :
1427 [ + + ]: 362366 : if (!m_subpackage.m_replaced_transactions.empty()) {
1428 [ + - - + : 35680 : LogDebug(BCLog::MEMPOOL, "replaced %u mempool transactions with 1 new transaction for %s additional fees, %d delta bytes\n",
- - ]
1429 : : m_subpackage.m_replaced_transactions.size(),
1430 : : ws.m_modified_fees - m_subpackage.m_conflicting_fees,
1431 : : ws.m_vsize - static_cast<int>(m_subpackage.m_conflicting_size));
1432 : : }
1433 : :
1434 : 362366 : return MempoolAcceptResult::Success(std::move(m_subpackage.m_replaced_transactions), ws.m_vsize, ws.m_base_fees,
1435 [ + - ]: 2575765 : effective_feerate, single_wtxid);
1436 [ + - + - ]: 2984763 : }
1437 : :
1438 : 339646 : PackageMempoolAcceptResult MemPoolAccept::AcceptMultipleTransactionsInternal(const std::vector<CTransactionRef>& txns, ATMPArgs& args)
1439 : : {
1440 : 339646 : AssertLockHeld(cs_main);
1441 : 339646 : AssertLockHeld(m_pool.cs);
1442 : :
1443 : : // These context-free package limits can be done before taking the mempool lock.
1444 [ + - ]: 339646 : PackageValidationState package_state;
1445 [ + - + + : 339858 : if (!IsWellFormedPackage(txns, package_state)) return PackageMempoolAcceptResult(package_state, {});
+ - + - ]
1446 : :
1447 : 339540 : std::vector<Workspace> workspaces{};
1448 [ - + + - ]: 339540 : workspaces.reserve(txns.size());
1449 [ + - ]: 339540 : std::transform(txns.cbegin(), txns.cend(), std::back_inserter(workspaces),
1450 : 461876 : [](const auto& tx) { return Workspace(tx); });
1451 : 339540 : std::map<Wtxid, MempoolAcceptResult> results;
1452 : :
1453 : : // Do all PreChecks first and fail fast to avoid running expensive script checks when unnecessary.
1454 [ + + ]: 565109 : for (Workspace& ws : workspaces) {
1455 [ + - + + ]: 450848 : if (!PreChecks(args, ws)) {
1456 [ + - + - : 449894 : package_state.Invalid(PackageValidationResult::PCKG_TX, "transaction failed");
+ - ]
1457 : : // Exit early to avoid doing pointless work. Update the failed tx result; the rest are unfinished.
1458 [ + - + - : 224947 : results.emplace(ws.m_ptx->GetWitnessHash(), MempoolAcceptResult::Failure(ws.m_state));
+ - ]
1459 [ + - + - ]: 674841 : return PackageMempoolAcceptResult(package_state, std::move(results));
1460 : : }
1461 : :
1462 : : // Individual modified feerate exceeded caller-defined max; abort
1463 : : // N.B. this doesn't take into account CPFPs. Chunk-aware validation may be more robust.
1464 [ + + + - : 225901 : if (args.m_client_maxfeerate && CFeeRate(ws.m_modified_fees, ws.m_vsize) > args.m_client_maxfeerate.value()) {
+ + ]
1465 : : // Need to set failure here both individually and at package level
1466 [ + - + - : 664 : ws.m_state.Invalid(TxValidationResult::TX_MEMPOOL_POLICY, "max feerate exceeded", "");
+ - ]
1467 [ + - + - : 664 : package_state.Invalid(PackageValidationResult::PCKG_TX, "transaction failed");
+ - ]
1468 : : // Exit early to avoid doing pointless work. Update the failed tx result; the rest are unfinished.
1469 [ + - + - : 332 : results.emplace(ws.m_ptx->GetWitnessHash(), MempoolAcceptResult::Failure(ws.m_state));
+ - ]
1470 [ + - + - ]: 996 : return PackageMempoolAcceptResult(package_state, std::move(results));
1471 : : }
1472 : :
1473 : : // Make the coins created by this transaction available for subsequent transactions in the
1474 : : // package to spend. If there are no conflicts within the package, no transaction can spend a coin
1475 : : // needed by another transaction in the package. We also need to make sure that no package
1476 : : // tx replaces (or replaces the ancestor of) the parent of another package tx. As long as we
1477 : : // check these two things, we don't need to track the coins spent.
1478 : : // If a package tx conflicts with a mempool tx, PackageRBFChecks() ensures later that any package RBF attempt
1479 : : // has *no* in-mempool ancestors, so we don't have to worry about subsequent transactions in
1480 : : // same package spending the same in-mempool outpoints. This needs to be revisited for general
1481 : : // package RBF.
1482 [ + - ]: 225569 : m_viewmempool.PackageAddTransaction(ws.m_ptx);
1483 : : }
1484 : :
1485 : : // At this point we have all in-mempool parents, and we know every transaction's vsize.
1486 : : // Run the TRUC checks on the package.
1487 [ + + ]: 297802 : for (Workspace& ws : workspaces) {
1488 [ + - + + ]: 184749 : if (auto err{PackageTRUCChecks(m_pool, ws.m_ptx, ws.m_vsize, txns, ws.m_parents)}) {
1489 [ + - + - ]: 1208 : package_state.Invalid(PackageValidationResult::PCKG_POLICY, "TRUC-violation", err.value());
1490 [ + - + - ]: 3624 : return PackageMempoolAcceptResult(package_state, {});
1491 : 184749 : }
1492 : : }
1493 : :
1494 : : // Transactions must meet two minimum feerates: the mempool minimum fee and min relay fee.
1495 : : // For transactions consisting of exactly one child and its parents, it suffices to use the
1496 : : // package feerate (total modified fees / total virtual size) to check this requirement.
1497 : : // Note that this is an aggregate feerate; this function has not checked that there are transactions
1498 : : // too low feerate to pay for themselves, or that the child transactions are higher feerate than
1499 : : // their parents. Using aggregate feerate may allow "parents pay for child" behavior and permit
1500 : : // a child that is below mempool minimum feerate. To avoid these behaviors, callers of
1501 : : // AcceptMultipleTransactions need to restrict txns topology (e.g. to ancestor sets) and check
1502 : : // the feerates of individuals and subsets.
1503 : 113053 : m_subpackage.m_total_vsize = std::accumulate(workspaces.cbegin(), workspaces.cend(), int64_t{0},
1504 : 182646 : [](int64_t sum, auto& ws) { return sum + ws.m_vsize; });
1505 : 113053 : m_subpackage.m_total_modified_fees = std::accumulate(workspaces.cbegin(), workspaces.cend(), CAmount{0},
1506 : 182646 : [](CAmount sum, auto& ws) { return sum + ws.m_modified_fees; });
1507 [ + - ]: 113053 : const CFeeRate package_feerate(m_subpackage.m_total_modified_fees, m_subpackage.m_total_vsize);
1508 : 113053 : std::vector<Wtxid> all_package_wtxids;
1509 [ - + + - ]: 113053 : all_package_wtxids.reserve(workspaces.size());
1510 [ + - ]: 113053 : std::transform(workspaces.cbegin(), workspaces.cend(), std::back_inserter(all_package_wtxids),
1511 : 182646 : [](const auto& ws) { return ws.m_ptx->GetWitnessHash(); });
1512 [ + + ]: 113053 : TxValidationState placeholder_state;
1513 [ + + + + ]: 166713 : if (args.m_package_feerates &&
1514 [ + - ]: 53660 : !CheckFeeRate(m_subpackage.m_total_vsize, m_subpackage.m_total_modified_fees, placeholder_state)) {
1515 [ + - + - : 6512 : package_state.Invalid(PackageValidationResult::PCKG_TX, "transaction failed");
+ - ]
1516 [ + - ]: 3256 : return PackageMempoolAcceptResult(package_state, {{workspaces.back().m_ptx->GetWitnessHash(),
1517 [ + - + - : 22792 : MempoolAcceptResult::FeeFailure(placeholder_state, CFeeRate(m_subpackage.m_total_modified_fees, m_subpackage.m_total_vsize), all_package_wtxids)}});
+ - + + -
- ]
1518 : : }
1519 : :
1520 : : // Apply package mempool RBF checks.
1521 [ + + + - : 109797 : if (m_subpackage.m_rbf && !PackageRBFChecks(txns, workspaces, m_subpackage.m_total_vsize, package_state)) {
+ + ]
1522 [ + - + - ]: 142152 : return PackageMempoolAcceptResult(package_state, std::move(results));
1523 : : }
1524 : :
1525 : : // Check if the transactions would exceed the cluster size limit.
1526 [ + - + + ]: 62413 : if (!m_subpackage.m_changeset->CheckMemPoolPolicyLimits()) {
1527 [ + - + - : 3472 : package_state.Invalid(PackageValidationResult::PCKG_POLICY, "too-large-cluster", "");
+ - ]
1528 [ + - + - ]: 5208 : return PackageMempoolAcceptResult(package_state, std::move(results));
1529 : : }
1530 : :
1531 : : // Now that we've bounded the resulting possible ancestry count, check package for dust spends
1532 [ + + ]: 60677 : if (m_pool.m_opts.require_standard) {
1533 [ + - ]: 40318 : TxValidationState child_state;
1534 [ + - ]: 40318 : Wtxid child_wtxid;
1535 [ + - + + ]: 40318 : if (!CheckEphemeralSpends(txns, m_pool.m_opts.dust_relay_feerate, m_pool, child_state, child_wtxid)) {
1536 [ + - + - : 330 : package_state.Invalid(PackageValidationResult::PCKG_TX, "unspent-dust");
+ - ]
1537 [ + - + - : 165 : results.emplace(child_wtxid, MempoolAcceptResult::Failure(child_state));
+ - ]
1538 [ + - + - ]: 495 : return PackageMempoolAcceptResult(package_state, std::move(results));
1539 : : }
1540 : 40318 : }
1541 : :
1542 [ + + ]: 124355 : for (Workspace& ws : workspaces) {
1543 : 65550 : ws.m_package_feerate = package_feerate;
1544 [ + - + + ]: 65550 : if (!PolicyScriptChecks(args, ws)) {
1545 : : // Exit early to avoid doing pointless work. Update the failed tx result; the rest are unfinished.
1546 [ + - + - : 3414 : package_state.Invalid(PackageValidationResult::PCKG_TX, "transaction failed");
+ - ]
1547 [ + - + - : 1707 : results.emplace(ws.m_ptx->GetWitnessHash(), MempoolAcceptResult::Failure(ws.m_state));
+ - ]
1548 [ + - + - ]: 5121 : return PackageMempoolAcceptResult(package_state, std::move(results));
1549 : : }
1550 [ + + ]: 63843 : if (args.m_test_accept) {
1551 [ - + ]: 55795 : const auto effective_feerate = args.m_package_feerates ? ws.m_package_feerate :
1552 [ + - ]: 55795 : CFeeRate{ws.m_modified_fees, static_cast<int32_t>(ws.m_vsize)};
1553 [ - + ]: 55795 : const auto effective_feerate_wtxids = args.m_package_feerates ? all_package_wtxids :
1554 [ - - + - ]: 55795 : std::vector<Wtxid>{ws.m_ptx->GetWitnessHash()};
1555 : 111590 : results.emplace(ws.m_ptx->GetWitnessHash(),
1556 [ + - + - ]: 55795 : MempoolAcceptResult::Success(std::move(m_subpackage.m_replaced_transactions),
1557 : : ws.m_vsize, ws.m_base_fees, effective_feerate,
1558 : : effective_feerate_wtxids));
1559 : 55795 : }
1560 : : }
1561 : :
1562 [ + + + - : 170395 : if (args.m_test_accept) return PackageMempoolAcceptResult(package_state, std::move(results));
+ - ]
1563 : :
1564 [ + - - + ]: 3010 : if (!SubmitPackage(args, workspaces, package_state, results)) {
1565 : : // PackageValidationState filled in by SubmitPackage().
1566 [ # # # # ]: 0 : return PackageMempoolAcceptResult(package_state, std::move(results));
1567 : : }
1568 : :
1569 [ + - + - ]: 9030 : return PackageMempoolAcceptResult(package_state, std::move(results));
1570 [ + - ]: 795495 : }
1571 : :
1572 : 3441278 : void MemPoolAccept::CleanupTemporaryCoins()
1573 : : {
1574 : : // There are 3 kinds of coins in m_view:
1575 : : // (1) Temporary coins from the transactions in subpackage, constructed by m_viewmempool.
1576 : : // (2) Mempool coins from transactions in the mempool, constructed by m_viewmempool.
1577 : : // (3) Confirmed coins fetched from our current UTXO set.
1578 : : //
1579 : : // (1) Temporary coins need to be removed, regardless of whether the transaction was submitted.
1580 : : // If the transaction was submitted to the mempool, m_viewmempool will be able to fetch them from
1581 : : // there. If it wasn't submitted to mempool, it is incorrect to keep them - future calls may try
1582 : : // to spend those coins that don't actually exist.
1583 : : // (2) Mempool coins also need to be removed. If the mempool contents have changed as a result
1584 : : // of submitting or replacing transactions, coins previously fetched from mempool may now be
1585 : : // spent or nonexistent. Those coins need to be deleted from m_view.
1586 : : // (3) Confirmed coins don't need to be removed. The chainstate has not changed (we are
1587 : : // holding cs_main and no blocks have been processed) so the confirmed tx cannot disappear like
1588 : : // a mempool tx can. The coin may now be spent after we submitted a tx to mempool, but
1589 : : // we have already checked that the package does not have 2 transactions spending the same coin
1590 : : // and we check whether a mempool transaction spends conflicting coins (CTxMemPool::GetConflictTx).
1591 : : // Keeping them in m_view is an optimization to not re-fetch confirmed coins if we later look up
1592 : : // inputs for this transaction again.
1593 [ + + ]: 7331014 : for (const auto& outpoint : m_viewmempool.GetNonBaseCoins()) {
1594 : : // In addition to resetting m_viewmempool, we also need to manually delete these coins from
1595 : : // m_view because it caches copies of the coins it fetched from m_viewmempool previously.
1596 : 3889736 : m_view.Uncache(outpoint);
1597 : : }
1598 : : // This deletes the temporary and mempool coins.
1599 : 3441278 : m_viewmempool.Reset();
1600 : 3441278 : }
1601 : :
1602 : 896502 : PackageMempoolAcceptResult MemPoolAccept::AcceptSubPackage(const std::vector<CTransactionRef>& subpackage, ATMPArgs& args)
1603 : : {
1604 : 896502 : AssertLockHeld(::cs_main);
1605 : 896502 : AssertLockHeld(m_pool.cs);
1606 : 1793004 : auto result = [&]() EXCLUSIVE_LOCKS_REQUIRED(::cs_main, m_pool.cs) {
1607 [ - + + + ]: 896502 : if (subpackage.size() > 1) {
1608 : 93375 : return AcceptMultipleTransactionsInternal(subpackage, args);
1609 : : }
1610 : 803127 : const auto& tx = subpackage.front();
1611 : 803127 : ATMPArgs single_args = ATMPArgs::SingleInPackageAccept(args);
1612 : 803127 : const auto single_res = AcceptSingleTransactionInternal(tx, single_args);
1613 [ + + ]: 803127 : PackageValidationState package_state_wrapped;
1614 [ + + ]: 803127 : if (single_res.m_result_type != MempoolAcceptResult::ResultType::VALID) {
1615 [ + - + - : 1314180 : package_state_wrapped.Invalid(PackageValidationResult::PCKG_TX, "transaction failed");
+ - ]
1616 : : }
1617 [ + - + + : 3212508 : return PackageMempoolAcceptResult(package_state_wrapped, {{tx->GetWitnessHash(), single_res}});
- - ]
1618 [ + - + - ]: 3305883 : }();
1619 : :
1620 : : // Clean up m_view and m_viewmempool so that other subpackage evaluations don't have access to
1621 : : // coins they shouldn't. Keep some coins in order to minimize re-fetching coins from the UTXO set.
1622 : : // Clean up package feerate and rbf calculations
1623 [ + - ]: 896502 : ClearSubPackageState();
1624 : :
1625 : 896502 : return result;
1626 : 0 : }
1627 : :
1628 : 537328 : PackageMempoolAcceptResult MemPoolAccept::AcceptPackage(const Package& package, ATMPArgs& args)
1629 : : {
1630 [ - + ]: 537328 : Assert(!package.empty());
1631 : 537328 : AssertLockHeld(cs_main);
1632 : : // Used if returning a PackageMempoolAcceptResult directly from this function.
1633 [ + - ]: 537328 : PackageValidationState package_state_quit_early;
1634 : :
1635 : : // There are two topologies we are able to handle through this function:
1636 : : // (1) A single transaction
1637 : : // (2) A child-with-parents package.
1638 : : // Check that the package is well-formed. If it isn't, we won't try to validate any of the
1639 : : // transactions and thus won't return any MempoolAcceptResults, just a package-wide error.
1640 : :
1641 : : // Context-free package checks.
1642 [ + - + + ]: 537328 : if (!IsWellFormedPackage(package, package_state_quit_early)) {
1643 [ + - + - ]: 287229 : return PackageMempoolAcceptResult(package_state_quit_early, {});
1644 : : }
1645 : :
1646 [ - + + + : 441585 : if (package.size() > 1 && !IsChildWithParents(package)) {
+ - + + ]
1647 : : // All transactions in the package must be a parent of the last transaction. This is just an
1648 : : // opportunity for us to fail fast on a context-free check without taking the mempool lock.
1649 [ + - + - : 25824 : package_state_quit_early.Invalid(PackageValidationResult::PCKG_POLICY, "package-not-child-with-parents");
+ - ]
1650 [ + - + - ]: 38736 : return PackageMempoolAcceptResult(package_state_quit_early, {});
1651 : : }
1652 : :
1653 [ + - ]: 428673 : LOCK(m_pool.cs);
1654 : : // Stores results from which we will create the returned PackageMempoolAcceptResult.
1655 : : // A result may be changed if a mempool transaction is evicted later due to LimitMempoolSize().
1656 : 428673 : std::map<Wtxid, MempoolAcceptResult> results_final;
1657 : : // Results from individual validation which will be returned if no other result is available for
1658 : : // this transaction. "Nonfinal" because if a transaction fails by itself but succeeds later
1659 : : // (i.e. when evaluated with a fee-bumping child), the result in this map may be discarded.
1660 : 428673 : std::map<Wtxid, MempoolAcceptResult> individual_results_nonfinal;
1661 : : // Tracks whether we think package submission could result in successful entry to the mempool
1662 : 428673 : bool quit_early{false};
1663 : 428673 : std::vector<CTransactionRef> txns_package_eval;
1664 [ + + ]: 1257204 : for (const auto& tx : package) {
1665 [ + - ]: 828531 : const auto& wtxid = tx->GetWitnessHash();
1666 [ + - ]: 828531 : const auto& txid = tx->GetHash();
1667 : : // There are 3 possibilities: already in mempool, same-txid-diff-wtxid already in mempool,
1668 : : // or not in mempool. An already confirmed tx is treated as one not in mempool, because all
1669 : : // we know is that the inputs aren't available.
1670 [ + - + + ]: 828531 : if (m_pool.exists(wtxid)) {
1671 : : // Exact transaction already exists in the mempool.
1672 : : // Node operators are free to set their mempool policies however they please, nodes may receive
1673 : : // transactions in different orders, and malicious counterparties may try to take advantage of
1674 : : // policy differences to pin or delay propagation of transactions. As such, it's possible for
1675 : : // some package transaction(s) to already be in the mempool, and we don't want to reject the
1676 : : // entire package in that case (as that could be a censorship vector). De-duplicate the
1677 : : // transactions that are already in the mempool, and only call AcceptMultipleTransactions() with
1678 : : // the new transactions. This ensures we don't double-count transaction counts and sizes when
1679 : : // checking ancestor/descendant limits, or double-count transaction fees for fee-related policy.
1680 [ + - - + ]: 26543 : const auto& entry{*Assert(m_pool.GetEntry(txid))};
1681 [ + - + - ]: 26543 : results_final.emplace(wtxid, MempoolAcceptResult::MempoolTx(entry.GetTxSize(), entry.GetFee()));
1682 [ + - + + ]: 801988 : } else if (m_pool.exists(txid)) {
1683 : : // Transaction with the same non-witness data but different witness (same txid,
1684 : : // different wtxid) already exists in the mempool.
1685 : : //
1686 : : // We don't allow replacement transactions right now, so just swap the package
1687 : : // transaction for the mempool one. Note that we are ignoring the validity of the
1688 : : // package transaction passed in.
1689 : : // TODO: allow witness replacement in packages.
1690 [ + - - + ]: 640 : const auto& entry{*Assert(m_pool.GetEntry(txid))};
1691 : : // Provide the wtxid of the mempool tx so that the caller can look it up in the mempool.
1692 [ + - ]: 640 : results_final.emplace(wtxid, MempoolAcceptResult::MempoolTxDifferentWitness(entry.GetTx().GetWitnessHash()));
1693 : : } else {
1694 : : // Transaction does not already exist in the mempool.
1695 : : // Try submitting the transaction on its own.
1696 [ + - + + : 1602696 : const auto single_package_res = AcceptSubPackage({tx}, args);
+ - - - -
- ]
1697 [ + - ]: 801348 : const auto& single_res = single_package_res.m_tx_results.at(wtxid);
1698 [ + + ]: 801348 : if (single_res.m_result_type == MempoolAcceptResult::ResultType::VALID) {
1699 : : // The transaction succeeded on its own and is now in the mempool. Don't include it
1700 : : // in package validation, because its fees should only be "used" once.
1701 [ + - - + ]: 146037 : assert(m_pool.exists(wtxid));
1702 [ + - ]: 146037 : results_final.emplace(wtxid, single_res);
1703 [ - + + + : 655311 : } else if (package.size() == 1 || // If there is only one transaction, no need to retry it "as a package"
+ + ]
1704 [ + + ]: 513537 : (single_res.m_state.GetResult() != TxValidationResult::TX_RECONSIDERABLE &&
1705 [ + + ]: 358147 : single_res.m_state.GetResult() != TxValidationResult::TX_MISSING_INPUTS)) {
1706 : : // Package validation policy only differs from individual policy in its evaluation
1707 : : // of feerate. For example, if a transaction fails here due to violation of a
1708 : : // consensus rule, the result will not change when it is submitted as part of a
1709 : : // package. To minimize the amount of repeated work, unless the transaction fails
1710 : : // due to feerate or missing inputs (its parent is a previous transaction in the
1711 : : // package that failed due to feerate), don't run package validation. Note that this
1712 : : // decision might not make sense if different types of packages are allowed in the
1713 : : // future. Continue individually validating the rest of the transactions, because
1714 : : // some of them may still be valid.
1715 : 305930 : quit_early = true;
1716 [ + - + - : 611860 : package_state_quit_early.Invalid(PackageValidationResult::PCKG_TX, "transaction failed");
+ - ]
1717 [ + - ]: 305930 : individual_results_nonfinal.emplace(wtxid, single_res);
1718 : : } else {
1719 [ + - ]: 349381 : individual_results_nonfinal.emplace(wtxid, single_res);
1720 [ + - ]: 349381 : txns_package_eval.push_back(tx);
1721 : : }
1722 : 801348 : }
1723 : : }
1724 : :
1725 [ + + + + : 1190865 : auto multi_submission_result = quit_early || txns_package_eval.empty() ? PackageMempoolAcceptResult(package_state_quit_early, {}) :
+ - + + -
- ]
1726 [ + - + - : 762192 : AcceptSubPackage(txns_package_eval, args);
+ - ]
1727 : 428673 : PackageValidationState& package_state_final = multi_submission_result.m_state;
1728 : :
1729 : : // This is invoked by AcceptSubPackage() already, so this is just here for
1730 : : // clarity (since it's not permitted to invoke LimitMempoolSize() while a
1731 : : // changeset is outstanding).
1732 [ + - ]: 428673 : ClearSubPackageState();
1733 : :
1734 : : // Make sure we haven't exceeded max mempool size.
1735 : : // Package transactions that were submitted to mempool or already in mempool may be evicted.
1736 : : // If mempool contents change, then the m_view cache is dirty. It has already been cleared above.
1737 [ + - + - ]: 428673 : LimitMempoolSize(m_pool, m_active_chainstate.CoinsTip());
1738 : :
1739 [ + + ]: 1257204 : for (const auto& tx : package) {
1740 : 828531 : const auto& wtxid = tx->GetWitnessHash();
1741 [ + + ]: 828531 : if (multi_submission_result.m_tx_results.contains(wtxid)) {
1742 : : // We shouldn't have re-submitted if the tx result was already in results_final.
1743 [ - + ]: 51600 : Assume(!results_final.contains(wtxid));
1744 : : // If it was submitted, check to see if the tx is still in the mempool. It could have
1745 : : // been evicted due to LimitMempoolSize() above.
1746 [ + - ]: 51600 : const auto& txresult = multi_submission_result.m_tx_results.at(wtxid);
1747 [ + + + - : 51600 : if (txresult.m_result_type == MempoolAcceptResult::ResultType::VALID && !m_pool.exists(wtxid)) {
+ + ]
1748 [ + - + - : 10882 : package_state_final.Invalid(PackageValidationResult::PCKG_TX, "transaction failed");
+ - ]
1749 [ + - ]: 5441 : TxValidationState mempool_full_state;
1750 [ + - + - : 10882 : mempool_full_state.Invalid(TxValidationResult::TX_MEMPOOL_POLICY, "mempool full");
+ - ]
1751 [ + - + - : 10882 : results_final.emplace(wtxid, MempoolAcceptResult::Failure(mempool_full_state));
+ - ]
1752 : 5441 : } else {
1753 [ + - ]: 46159 : results_final.emplace(wtxid, txresult);
1754 : : }
1755 [ + + ]: 776931 : } else if (const auto it{results_final.find(wtxid)}; it != results_final.end()) {
1756 : : // Already-in-mempool transaction. Check to see if it's still there, as it could have
1757 : : // been evicted when LimitMempoolSize() was called.
1758 [ - + ]: 173220 : Assume(it->second.m_result_type != MempoolAcceptResult::ResultType::INVALID);
1759 [ - + ]: 173220 : Assume(!individual_results_nonfinal.contains(wtxid));
1760 : : // Query by txid to include the same-txid-different-witness ones.
1761 [ + - + + ]: 173220 : if (!m_pool.exists(tx->GetHash())) {
1762 [ + - + - : 8562 : package_state_final.Invalid(PackageValidationResult::PCKG_TX, "transaction failed");
+ - ]
1763 [ + - ]: 4281 : TxValidationState mempool_full_state;
1764 [ + - + - : 8562 : mempool_full_state.Invalid(TxValidationResult::TX_MEMPOOL_POLICY, "mempool full");
+ - ]
1765 : : // Replace the previous result.
1766 : 4281 : results_final.erase(wtxid);
1767 [ + - + - : 8562 : results_final.emplace(wtxid, MempoolAcceptResult::Failure(mempool_full_state));
+ - ]
1768 : 4281 : }
1769 [ + - ]: 603711 : } else if (const auto it{individual_results_nonfinal.find(wtxid)}; it != individual_results_nonfinal.end()) {
1770 [ - + ]: 603711 : Assume(it->second.m_result_type == MempoolAcceptResult::ResultType::INVALID);
1771 : : // Interesting result from previous processing.
1772 [ + - ]: 603711 : results_final.emplace(wtxid, it->second);
1773 : : }
1774 : : }
1775 [ - + - + ]: 428673 : Assume(results_final.size() == package.size());
1776 [ + - + - ]: 857346 : return PackageMempoolAcceptResult(package_state_final, std::move(results_final));
1777 [ + - + - : 2997370 : }
+ - ]
1778 : :
1779 : : } // anon namespace
1780 : :
1781 : 1772638 : MempoolAcceptResult AcceptToMemoryPool(Chainstate& active_chainstate, const CTransactionRef& tx,
1782 : : int64_t accept_time, bool bypass_limits, bool test_accept)
1783 : : {
1784 : 1772638 : AssertLockHeld(::cs_main);
1785 [ - + ]: 1772638 : const CChainParams& chainparams{active_chainstate.m_chainman.GetParams()};
1786 [ - + ]: 1772638 : assert(active_chainstate.GetMempool() != nullptr);
1787 : 1772638 : CTxMemPool& pool{*active_chainstate.GetMempool()};
1788 : :
1789 : 1772638 : std::vector<COutPoint> coins_to_uncache;
1790 : :
1791 [ + - ]: 1772638 : auto args = MemPoolAccept::ATMPArgs::SingleAccept(chainparams, accept_time, bypass_limits, coins_to_uncache, test_accept);
1792 [ + - + - ]: 1772638 : MempoolAcceptResult result = MemPoolAccept(pool, active_chainstate).AcceptSingleTransactionAndCleanup(tx, args);
1793 : :
1794 [ + + ]: 1772638 : if (result.m_result_type != MempoolAcceptResult::ResultType::VALID) {
1795 : : // Remove coins that were not present in the coins cache before calling
1796 : : // AcceptSingleTransaction(); this is to prevent memory DoS in case we receive a large
1797 : : // number of invalid transactions that attempt to overrun the in-memory coins cache
1798 : : // (`CCoinsViewCache::cacheCoins`).
1799 : :
1800 [ + + ]: 3224017 : for (const COutPoint& hashTx : coins_to_uncache)
1801 [ + - + - ]: 1677153 : active_chainstate.CoinsTip().Uncache(hashTx);
1802 : : TRACEPOINT(mempool, rejected,
1803 : : tx->GetHash().data(),
1804 : : result.m_state.GetRejectReason().c_str()
1805 : : );
1806 : : }
1807 : : // After we've (potentially) uncached entries, ensure our coins cache is still within its size limits
1808 [ + - ]: 1772638 : BlockValidationState state_dummy;
1809 [ + - ]: 1772638 : active_chainstate.FlushStateToDisk(state_dummy, FlushStateMode::PERIODIC);
1810 : 1772638 : return result;
1811 : 1772638 : }
1812 : :
1813 : 783599 : PackageMempoolAcceptResult ProcessNewPackage(Chainstate& active_chainstate, CTxMemPool& pool,
1814 : : const Package& package, bool test_accept, const std::optional<CFeeRate>& client_maxfeerate)
1815 : : {
1816 : 783599 : AssertLockHeld(cs_main);
1817 [ - + ]: 783599 : assert(!package.empty());
1818 [ + - - + ]: 2524008 : assert(std::all_of(package.cbegin(), package.cend(), [](const auto& tx){return tx != nullptr;}));
1819 : :
1820 : 783599 : std::vector<COutPoint> coins_to_uncache;
1821 [ + - ]: 783599 : const CChainParams& chainparams = active_chainstate.m_chainman.GetParams();
1822 : 1567198 : auto result = [&]() EXCLUSIVE_LOCKS_REQUIRED(cs_main) {
1823 : 783599 : AssertLockHeld(cs_main);
1824 [ + + ]: 783599 : if (test_accept) {
1825 : 246271 : auto args = MemPoolAccept::ATMPArgs::PackageTestAccept(chainparams, GetTime(), coins_to_uncache);
1826 [ + - ]: 246271 : return MemPoolAccept(pool, active_chainstate).AcceptMultipleTransactionsAndCleanup(package, args);
1827 : : } else {
1828 : 537328 : auto args = MemPoolAccept::ATMPArgs::PackageChildWithParents(chainparams, GetTime(), coins_to_uncache, client_maxfeerate);
1829 [ + - ]: 537328 : return MemPoolAccept(pool, active_chainstate).AcceptPackage(package, args);
1830 : : }
1831 [ + - ]: 783599 : }();
1832 : :
1833 : : // Uncache coins pertaining to transactions that were not submitted to the mempool.
1834 [ + + + + ]: 783599 : if (test_accept || result.m_state.IsInvalid()) {
1835 [ + + ]: 1976433 : for (const COutPoint& hashTx : coins_to_uncache) {
1836 [ + - + - ]: 1253866 : active_chainstate.CoinsTip().Uncache(hashTx);
1837 : : }
1838 : : }
1839 : : // Ensure the coins cache is still within limits.
1840 [ + - ]: 783599 : BlockValidationState state_dummy;
1841 [ + - ]: 783599 : active_chainstate.FlushStateToDisk(state_dummy, FlushStateMode::PERIODIC);
1842 : 783599 : return result;
1843 : 783599 : }
1844 : :
1845 : 1143949 : CAmount GetBlockSubsidy(int nHeight, const Consensus::Params& consensusParams)
1846 : : {
1847 : 1143949 : int halvings = nHeight / consensusParams.nSubsidyHalvingInterval;
1848 : : // Force block reward to zero when right shift is undefined.
1849 [ + - ]: 1143949 : if (halvings >= 64)
1850 : : return 0;
1851 : :
1852 : 1143949 : CAmount nSubsidy = 50 * COIN;
1853 : : // Subsidy is cut in half every 210,000 blocks which will occur approximately every 4 years.
1854 : 1143949 : nSubsidy >>= halvings;
1855 : 1143949 : return nSubsidy;
1856 : : }
1857 : :
1858 : 5613 : CoinsViews::CoinsViews(DBParams db_params, CoinsViewOptions options)
1859 [ + - ]: 5613 : : m_dbview{std::move(db_params), std::move(options)},
1860 [ + - ]: 5613 : m_catcherview(&m_dbview) {}
1861 : :
1862 : 5613 : void CoinsViews::InitCache()
1863 : : {
1864 : 5613 : AssertLockHeld(::cs_main);
1865 : 5613 : m_cacheview = std::make_unique<CCoinsViewCache>(&m_catcherview);
1866 : 5613 : m_connect_block_view = std::make_unique<CoinsViewOverlay>(&*m_cacheview);
1867 : 5613 : }
1868 : :
1869 : 5613 : Chainstate::Chainstate(
1870 : : CTxMemPool* mempool,
1871 : : BlockManager& blockman,
1872 : : ChainstateManager& chainman,
1873 : 5613 : std::optional<uint256> from_snapshot_blockhash)
1874 [ + + ]: 5613 : : m_mempool(mempool),
1875 : 5613 : m_blockman(blockman),
1876 [ + + ]: 5613 : m_chainman(chainman),
1877 [ + + ]: 5613 : m_assumeutxo(from_snapshot_blockhash ? Assumeutxo::UNVALIDATED : Assumeutxo::VALIDATED),
1878 [ + + ]: 5613 : m_from_snapshot_blockhash(from_snapshot_blockhash) {}
1879 : :
1880 : 5613 : fs::path Chainstate::StoragePath() const
1881 : : {
1882 [ + - ]: 11226 : fs::path path{m_chainman.m_options.datadir / "chainstate"};
1883 [ + + ]: 5613 : if (m_from_snapshot_blockhash) {
1884 [ + - ]: 2402 : path += node::SNAPSHOT_CHAINSTATE_SUFFIX;
1885 : : }
1886 : 5613 : return path;
1887 : 0 : }
1888 : :
1889 : 1307217 : const CBlockIndex* Chainstate::SnapshotBase() const
1890 : : {
1891 [ + + ]: 1307217 : if (!m_from_snapshot_blockhash) return nullptr;
1892 [ + + - + ]: 22512 : if (!m_cached_snapshot_base) m_cached_snapshot_base = Assert(m_chainman.m_blockman.LookupBlockIndex(*m_from_snapshot_blockhash));
1893 : 22512 : return m_cached_snapshot_base;
1894 : : }
1895 : :
1896 : 2620870 : const CBlockIndex* Chainstate::TargetBlock() const
1897 : : {
1898 [ - + ]: 2620870 : if (!m_target_blockhash) return nullptr;
1899 [ # # # # ]: 0 : if (!m_cached_target_block) m_cached_target_block = Assert(m_chainman.m_blockman.LookupBlockIndex(*m_target_blockhash));
1900 : 0 : return m_cached_target_block;
1901 : : }
1902 : :
1903 : 0 : void Chainstate::SetTargetBlock(CBlockIndex* block)
1904 : : {
1905 [ # # ]: 0 : if (block) {
1906 [ # # ]: 0 : m_target_blockhash = block->GetBlockHash();
1907 : : } else {
1908 [ # # ]: 0 : m_target_blockhash.reset();
1909 : : }
1910 : 0 : m_cached_target_block = block;
1911 : 0 : }
1912 : :
1913 : 0 : void Chainstate::SetTargetBlockHash(uint256 block_hash)
1914 : : {
1915 [ # # ]: 0 : m_target_blockhash = block_hash;
1916 : 0 : m_cached_target_block = nullptr;
1917 : 0 : }
1918 : :
1919 : 5613 : void Chainstate::InitCoinsDB(
1920 : : size_t cache_size_bytes,
1921 : : bool in_memory,
1922 : : bool should_wipe)
1923 : : {
1924 : 5613 : m_coins_views = std::make_unique<CoinsViews>(
1925 : 16839 : DBParams{
1926 : : .path = StoragePath(),
1927 : : .cache_bytes = cache_size_bytes,
1928 : : .memory_only = in_memory,
1929 : : .wipe_data = should_wipe,
1930 : : .obfuscate = true,
1931 [ + - ]: 5613 : .options = m_chainman.m_options.coins_db},
1932 : 11226 : m_chainman.m_options.coins_view);
1933 : :
1934 : 5613 : m_coinsdb_cache_size_bytes = cache_size_bytes;
1935 : 5613 : }
1936 : :
1937 : 5613 : void Chainstate::InitCoinsCache(size_t cache_size_bytes)
1938 : : {
1939 : 5613 : AssertLockHeld(::cs_main);
1940 [ - + ]: 5613 : assert(m_coins_views != nullptr);
1941 : 5613 : m_coinstip_cache_size_bytes = cache_size_bytes;
1942 : 5613 : m_coins_views->InitCache();
1943 : 5613 : }
1944 : :
1945 : : // Lock-free: depends on `m_cached_is_ibd`, which is latched by `UpdateIBDStatus()`.
1946 : 5852247 : bool ChainstateManager::IsInitialBlockDownload() const noexcept
1947 : : {
1948 : 5852247 : return m_cached_is_ibd.load(std::memory_order_relaxed);
1949 : : }
1950 : :
1951 : 359432 : void Chainstate::CheckForkWarningConditions()
1952 : : {
1953 : 359432 : AssertLockHeld(cs_main);
1954 : :
1955 [ + - ]: 359432 : if (this->GetRole().historical) {
1956 : : return;
1957 : : }
1958 : :
1959 [ + + - + : 518052 : if (m_chainman.m_best_invalid && m_chainman.m_best_invalid->nChainWork > m_chain.Tip()->nChainWork + (GetBlockProof(*m_chain.Tip()) * 6)) {
- + + + ]
1960 : 1685 : LogWarning("Found invalid chain more than 6 blocks longer than our best chain. This could be due to database corruption or consensus incompatibility with peers.");
1961 [ + - ]: 1685 : m_chainman.GetNotifications().warningSet(
1962 : : kernel::Warning::LARGE_WORK_INVALID_CHAIN,
1963 : 3370 : _("Warning: Found invalid chain more than 6 blocks longer than our best chain. This could be due to database corruption or consensus incompatibility with peers."));
1964 : : } else {
1965 : 357747 : m_chainman.GetNotifications().warningUnset(kernel::Warning::LARGE_WORK_INVALID_CHAIN);
1966 : : }
1967 : : }
1968 : :
1969 : : // Called both upon regular invalid block discovery *and* InvalidateBlock
1970 : 23900 : void Chainstate::InvalidChainFound(CBlockIndex* pindexNew)
1971 : : {
1972 : 23900 : AssertLockHeld(cs_main);
1973 [ + + + + ]: 23900 : if (!m_chainman.m_best_invalid || pindexNew->nChainWork > m_chainman.m_best_invalid->nChainWork) {
1974 : 5229 : m_chainman.m_best_invalid = pindexNew;
1975 : : }
1976 : 23900 : SetBlockFailureFlags(pindexNew);
1977 [ + - + + ]: 23900 : if (m_chainman.m_best_header != nullptr && m_chainman.m_best_header->GetAncestor(pindexNew->nHeight) == pindexNew) {
1978 : 9463 : m_chainman.RecalculateBestHeader();
1979 : : }
1980 : :
1981 [ + - + - : 23900 : LogInfo("%s: invalid block=%s height=%d log2_work=%f date=%s", __func__,
+ - ]
1982 : : pindexNew->GetBlockHash().ToString(), pindexNew->nHeight,
1983 : : log(pindexNew->nChainWork.getdouble())/log(2.0), FormatISO8601DateTime(pindexNew->GetBlockTime()));
1984 [ - + ]: 23900 : CBlockIndex *tip = m_chain.Tip();
1985 [ - + ]: 23900 : assert (tip);
1986 [ + - - + : 23900 : LogInfo("%s: current best=%s height=%d log2_work=%f date=%s", __func__,
+ - + - ]
1987 : : tip->GetBlockHash().ToString(), m_chain.Height(), log(tip->nChainWork.getdouble())/log(2.0),
1988 : : FormatISO8601DateTime(tip->GetBlockTime()));
1989 : 23900 : CheckForkWarningConditions();
1990 : 23900 : }
1991 : :
1992 : : // Same as InvalidChainFound, above, except not called directly from InvalidateBlock,
1993 : : // which does its own setBlockIndexCandidates management.
1994 : 30356 : void Chainstate::InvalidBlockFound(CBlockIndex* pindex, const BlockValidationState& state)
1995 : : {
1996 : 30356 : AssertLockHeld(cs_main);
1997 [ + + ]: 30356 : if (state.GetResult() != BlockValidationResult::BLOCK_MUTATED) {
1998 : 13846 : pindex->nStatus |= BLOCK_FAILED_VALID;
1999 : 13846 : m_blockman.m_dirty_blockindex.insert(pindex);
2000 : 13846 : setBlockIndexCandidates.erase(pindex);
2001 : 13846 : InvalidChainFound(pindex);
2002 : : }
2003 : 30356 : }
2004 : :
2005 : 743972 : void UpdateCoins(const CTransaction& tx, CCoinsViewCache& inputs, CTxUndo &txundo, int nHeight)
2006 : : {
2007 : : // mark inputs spent
2008 [ + + ]: 743972 : if (!tx.IsCoinBase()) {
2009 [ - + ]: 49190 : txundo.vprevout.reserve(tx.vin.size());
2010 [ + + ]: 122830 : for (const CTxIn &txin : tx.vin) {
2011 : 73640 : txundo.vprevout.emplace_back();
2012 : 73640 : bool is_spent = inputs.SpendCoin(txin.prevout, &txundo.vprevout.back());
2013 [ - + ]: 73640 : assert(is_spent);
2014 : : }
2015 : : }
2016 : : // add outputs
2017 : 743972 : AddCoins(inputs, tx, nHeight);
2018 : 743972 : }
2019 : :
2020 : 1120141 : std::optional<std::pair<ScriptError, std::string>> CScriptCheck::operator()() {
2021 [ + - ]: 1120141 : const CScript &scriptSig = ptxTo->vin[nIn].scriptSig;
2022 : 1120141 : const CScriptWitness *witness = &ptxTo->vin[nIn].scriptWitness;
2023 : 1120141 : ScriptError error{SCRIPT_ERR_UNKNOWN_ERROR};
2024 [ + - + + ]: 1120141 : if (VerifyScript(scriptSig, m_tx_out.scriptPubKey, witness, m_flags, CachingTransactionSignatureChecker(ptxTo, nIn, m_tx_out.nValue, cacheStore, *m_signature_cache, *txdata), &error)) {
2025 : 1031056 : return std::nullopt;
2026 : : } else {
2027 [ + - + - : 178170 : auto debug_str = strprintf("input %i of %s (wtxid %s), spending %s:%i", nIn, ptxTo->GetHash().ToString(), ptxTo->GetWitnessHash().ToString(), ptxTo->vin[nIn].prevout.hash.ToString(), ptxTo->vin[nIn].prevout.n);
+ - ]
2028 : 89085 : return std::make_pair(error, std::move(debug_str));
2029 : 89085 : }
2030 : : }
2031 : :
2032 : 3211 : ValidationCache::ValidationCache(const size_t script_execution_cache_bytes, const size_t signature_cache_bytes)
2033 [ + - ]: 3211 : : m_signature_cache{signature_cache_bytes}
2034 : : {
2035 : : // Setup the salted hasher
2036 : 3211 : uint256 nonce = GetRandHash();
2037 : : // We want the nonce to be 64 bytes long to force the hasher to process
2038 : : // this chunk, which makes later hash computations more efficient. We
2039 : : // just write our 32-byte entropy twice to fill the 64 bytes.
2040 [ + - ]: 3211 : m_script_execution_cache_hasher.Write(nonce.begin(), 32);
2041 [ + - ]: 3211 : m_script_execution_cache_hasher.Write(nonce.begin(), 32);
2042 : :
2043 [ + - + - ]: 3211 : const auto [num_elems, approx_size_bytes] = m_script_execution_cache.setup_bytes(script_execution_cache_bytes);
2044 [ + - ]: 3211 : LogInfo("Using %zu MiB out of %zu MiB requested for script execution cache, able to store %zu elements",
2045 : : approx_size_bytes >> 20, script_execution_cache_bytes >> 20, num_elems);
2046 : 3211 : }
2047 : :
2048 : : /**
2049 : : * Check whether all of this transaction's input scripts succeed.
2050 : : *
2051 : : * This involves ECDSA signature checks so can be computationally intensive. This function should
2052 : : * only be called after the cheap sanity checks in CheckTxInputs passed.
2053 : : *
2054 : : * If pvChecks is not nullptr, script checks are pushed onto it instead of being performed inline. Any
2055 : : * script checks which are not necessary (eg due to script execution cache hits) are, obviously,
2056 : : * not pushed onto pvChecks/run.
2057 : : *
2058 : : * Setting cacheSigStore/cacheFullScriptStore to false will remove elements from the corresponding cache
2059 : : * which are matched. This is useful for checking blocks where we will likely never need the cache
2060 : : * entry again.
2061 : : *
2062 : : * Note that we may set state.reason to NOT_STANDARD for extra soft-fork flags in flags, block-checking
2063 : : * callers should probably reset it to CONSENSUS in such cases.
2064 : : *
2065 : : * Non-static (and redeclared) in src/test/txvalidationcache_tests.cpp
2066 : : */
2067 : 968662 : bool CheckInputScripts(const CTransaction& tx, TxValidationState& state,
2068 : : const CCoinsViewCache& inputs, script_verify_flags flags, bool cacheSigStore,
2069 : : bool cacheFullScriptStore, PrecomputedTransactionData& txdata,
2070 : : ValidationCache& validation_cache,
2071 : : std::vector<CScriptCheck>* pvChecks)
2072 : : {
2073 [ + - ]: 968662 : if (tx.IsCoinBase()) return true;
2074 : :
2075 [ - + ]: 968662 : if (pvChecks) {
2076 [ # # ]: 0 : pvChecks->reserve(tx.vin.size());
2077 : : }
2078 : :
2079 : : // First check if script executions have been cached with the same
2080 : : // flags. Note that this assumes that the inputs provided are
2081 : : // correct (ie that the transaction hash which is in tx's prevouts
2082 : : // properly commits to the scriptPubKey in the inputs view of that
2083 : : // transaction).
2084 : 968662 : uint256 hashCacheEntry;
2085 : 968662 : CSHA256 hasher = validation_cache.ScriptExecutionCacheHasher();
2086 : 968662 : hasher.Write(UCharCast(tx.GetWitnessHash().begin()), 32).Write((unsigned char*)&flags, sizeof(flags)).Finalize(hashCacheEntry.begin());
2087 : 968662 : AssertLockHeld(cs_main); //TODO: Remove this requirement by making CuckooCache not require external locks
2088 [ + + ]: 968662 : if (validation_cache.m_script_execution_cache.contains(hashCacheEntry, !cacheFullScriptStore)) {
2089 : : return true;
2090 : : }
2091 : :
2092 [ + + ]: 625984 : if (!txdata.m_spent_outputs_ready) {
2093 : 532710 : std::vector<CTxOut> spent_outputs;
2094 [ - + + - ]: 532710 : spent_outputs.reserve(tx.vin.size());
2095 : :
2096 [ + + ]: 1477150 : for (const auto& txin : tx.vin) {
2097 : 944440 : const COutPoint& prevout = txin.prevout;
2098 [ + - ]: 944440 : const Coin& coin = inputs.AccessCoin(prevout);
2099 [ - + ]: 944440 : assert(!coin.IsSpent());
2100 [ + - ]: 944440 : spent_outputs.emplace_back(coin.out);
2101 : : }
2102 [ + - ]: 532710 : txdata.Init(tx, std::move(spent_outputs));
2103 : 532710 : }
2104 [ - + - + : 625984 : assert(txdata.m_spent_outputs.size() == tx.vin.size());
- + ]
2105 : :
2106 [ - + + + ]: 1657040 : for (unsigned int i = 0; i < tx.vin.size(); i++) {
2107 : :
2108 : : // We very carefully only pass in things to CScriptCheck which
2109 : : // are clearly committed to by tx' witness hash. This provides
2110 : : // a sanity check that our caching is not introducing consensus
2111 : : // failures through additional data in, eg, the coins being
2112 : : // spent being checked as a part of CScriptCheck.
2113 : :
2114 : : // Verify signature
2115 : 1120141 : CScriptCheck check(txdata.m_spent_outputs[i], tx, validation_cache.m_signature_cache, i, flags, cacheSigStore, &txdata);
2116 [ - + ]: 1120141 : if (pvChecks) {
2117 [ # # ]: 0 : pvChecks->emplace_back(std::move(check));
2118 [ + - + + ]: 1120141 : } else if (auto result = check(); result.has_value()) {
2119 : : // Tx failures never trigger disconnections/bans.
2120 : : // This is so that network splits aren't triggered
2121 : : // either due to non-consensus relay policies (such as
2122 : : // non-standard DER encodings or non-null dummy
2123 : : // arguments) or due to new consensus rules introduced in
2124 : : // soft forks.
2125 [ + - ]: 89085 : if (flags & STANDARD_NOT_MANDATORY_VERIFY_FLAGS) {
2126 [ + - + - : 89085 : return state.Invalid(TxValidationResult::TX_NOT_STANDARD, strprintf("mempool-script-verify-flag-failed (%s)", ScriptErrorString(result->first)), result->second);
+ - ]
2127 : : } else {
2128 [ # # # # : 0 : return state.Invalid(TxValidationResult::TX_CONSENSUS, strprintf("block-script-verify-flag-failed (%s)", ScriptErrorString(result->first)), result->second);
# # ]
2129 : : }
2130 : 1120141 : }
2131 : 1120141 : }
2132 : :
2133 [ + + ]: 536899 : if (cacheFullScriptStore && !pvChecks) {
2134 : : // We executed all of the provided scripts, and were told to
2135 : : // cache the result. Do so now.
2136 : 93274 : validation_cache.m_script_execution_cache.insert(hashCacheEntry);
2137 : : }
2138 : :
2139 : : return true;
2140 : : }
2141 : :
2142 : 0 : bool FatalError(Notifications& notifications, BlockValidationState& state, const bilingual_str& message)
2143 : : {
2144 : 0 : notifications.fatalError(message);
2145 [ # # ]: 0 : return state.Error(message.original);
2146 : : }
2147 : :
2148 : : /**
2149 : : * Restore the UTXO in a Coin at a given COutPoint
2150 : : * @param undo The Coin to be restored.
2151 : : * @param view The coins view to which to apply the changes.
2152 : : * @param out The out point that corresponds to the tx input.
2153 : : * @return A DisconnectResult as an int
2154 : : */
2155 : 0 : int ApplyTxInUndo(Coin&& undo, CCoinsViewCache& view, const COutPoint& out)
2156 : : {
2157 : 0 : bool fClean = true;
2158 : :
2159 [ # # ]: 0 : if (view.HaveCoin(out)) fClean = false; // overwriting transaction output
2160 : :
2161 [ # # ]: 0 : if (undo.nHeight == 0) {
2162 : : // Missing undo metadata (height and coinbase). Older versions included this
2163 : : // information only in undo records for the last spend of a transactions'
2164 : : // outputs. This implies that it must be present for some other output of the same tx.
2165 : 0 : const Coin& alternate = AccessByTxid(view, out.hash);
2166 [ # # ]: 0 : if (!alternate.IsSpent()) {
2167 : 0 : undo.nHeight = alternate.nHeight;
2168 : 0 : undo.fCoinBase = alternate.fCoinBase;
2169 : : } else {
2170 : : return DISCONNECT_FAILED; // adding output for transaction without known metadata
2171 : : }
2172 : : }
2173 : : // If the coin already exists as an unspent coin in the cache, then the
2174 : : // possible_overwrite parameter to AddCoin must be set to true. We have
2175 : : // already checked whether an unspent coin exists above using HaveCoin, so
2176 : : // we don't need to guess. When fClean is false, an unspent coin already
2177 : : // existed and it is an overwrite.
2178 : 0 : view.AddCoin(out, std::move(undo), !fClean);
2179 : :
2180 [ # # ]: 0 : return fClean ? DISCONNECT_OK : DISCONNECT_UNCLEAN;
2181 : : }
2182 : :
2183 : : /** Undo the effects of this block (with given index) on the UTXO set represented by coins.
2184 : : * When FAILED is returned, view is left in an indeterminate state. */
2185 : 0 : DisconnectResult Chainstate::DisconnectBlock(const CBlock& block, const CBlockIndex* pindex, CCoinsViewCache& view)
2186 : : {
2187 : 0 : AssertLockHeld(::cs_main);
2188 : 0 : bool fClean = true;
2189 : :
2190 : 0 : CBlockUndo blockUndo;
2191 [ # # # # ]: 0 : if (!m_blockman.ReadBlockUndo(blockUndo, *pindex)) {
2192 [ # # ]: 0 : LogError("DisconnectBlock(): failure reading undo data\n");
2193 : : return DISCONNECT_FAILED;
2194 : : }
2195 : :
2196 [ # # # # : 0 : if (blockUndo.vtxundo.size() + 1 != block.vtx.size()) {
# # ]
2197 [ # # ]: 0 : LogError("DisconnectBlock(): block and undo data inconsistent\n");
2198 : : return DISCONNECT_FAILED;
2199 : : }
2200 : :
2201 : : // Ignore blocks that contain transactions which are 'overwritten' by later transactions,
2202 : : // unless those are already completely spent.
2203 : : // See https://github.com/bitcoin/bitcoin/issues/22596 for additional information.
2204 : : // Note: the blocks specified here are different than the ones used in ConnectBlock because DisconnectBlock
2205 : : // unwinds the blocks in reverse. As a result, the inconsistency is not discovered until the earlier
2206 : : // blocks with the duplicate coinbase transactions are disconnected.
2207 [ # # # # ]: 0 : bool fEnforceBIP30 = !((pindex->nHeight==91722 && pindex->GetBlockHash() == uint256{"00000000000271a2dc26e7667f8419f2e15416dc6955e5a6c6cdf3f2574dd08e"}) ||
2208 [ # # # # ]: 0 : (pindex->nHeight==91812 && pindex->GetBlockHash() == uint256{"00000000000af0aed4792b1acee3d966af36cf5def14935db8de83d6f9306f2f"}));
2209 : :
2210 : : // undo transactions in reverse order
2211 [ # # # # ]: 0 : for (int i = block.vtx.size() - 1; i >= 0; i--) {
2212 : 0 : const CTransaction &tx = *(block.vtx[i]);
2213 : 0 : Txid hash = tx.GetHash();
2214 : 0 : bool is_coinbase = tx.IsCoinBase();
2215 : 0 : bool is_bip30_exception = (is_coinbase && !fEnforceBIP30);
2216 : :
2217 : : // Check that all outputs are available and match the outputs in the block itself
2218 : : // exactly.
2219 [ # # # # ]: 0 : for (size_t o = 0; o < tx.vout.size(); o++) {
2220 [ # # ]: 0 : if (!tx.vout[o].scriptPubKey.IsUnspendable()) {
2221 : 0 : COutPoint out(hash, o);
2222 : 0 : Coin coin;
2223 [ # # ]: 0 : bool is_spent = view.SpendCoin(out, &coin);
2224 [ # # # # : 0 : if (!is_spent || tx.vout[o] != coin.out || pindex->nHeight != coin.nHeight || is_coinbase != coin.IsCoinBase()) {
# # # # ]
2225 [ # # ]: 0 : if (!is_bip30_exception) {
2226 : 0 : fClean = false; // transaction output mismatch
2227 : : }
2228 : : }
2229 : 0 : }
2230 : : }
2231 : :
2232 : : // restore inputs
2233 [ # # ]: 0 : if (i > 0) { // not coinbases
2234 [ # # ]: 0 : CTxUndo &txundo = blockUndo.vtxundo[i-1];
2235 [ # # # # : 0 : if (txundo.vprevout.size() != tx.vin.size()) {
# # ]
2236 [ # # ]: 0 : LogError("DisconnectBlock(): transaction and undo data inconsistent\n");
2237 : : return DISCONNECT_FAILED;
2238 : : }
2239 [ # # ]: 0 : for (unsigned int j = tx.vin.size(); j > 0;) {
2240 : 0 : --j;
2241 [ # # ]: 0 : const COutPoint& out = tx.vin[j].prevout;
2242 [ # # ]: 0 : int res = ApplyTxInUndo(std::move(txundo.vprevout[j]), view, out);
2243 [ # # ]: 0 : if (res == DISCONNECT_FAILED) return DISCONNECT_FAILED;
2244 : 0 : fClean = fClean && res != DISCONNECT_UNCLEAN;
2245 : : }
2246 : : // At this point, all of txundo.vprevout should have been moved out.
2247 : : }
2248 : : }
2249 : :
2250 : : // move best block pointer to prevout block
2251 [ # # ]: 0 : view.SetBestBlock(pindex->pprev->GetBlockHash());
2252 : :
2253 [ # # ]: 0 : return fClean ? DISCONNECT_OK : DISCONNECT_UNCLEAN;
2254 : 0 : }
2255 : :
2256 : 1082279 : script_verify_flags GetBlockScriptFlags(const CBlockIndex& block_index, const ChainstateManager& chainman)
2257 : : {
2258 [ - + ]: 1082279 : const Consensus::Params& consensusparams = chainman.GetConsensus();
2259 : :
2260 : : // BIP16 didn't become active until Apr 1 2012 (on mainnet, and
2261 : : // retroactively applied to testnet)
2262 : : // However, only one historical block violated the P2SH rules (on both
2263 : : // mainnet and testnet).
2264 : : // Similarly, only one historical block violated the TAPROOT rules on
2265 : : // mainnet.
2266 : : // For simplicity, always leave P2SH+WITNESS+TAPROOT on except for the two
2267 : : // violating blocks.
2268 : 1082279 : script_verify_flags flags{SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_TAPROOT};
2269 [ - + ]: 1082279 : const auto it{consensusparams.script_flag_exceptions.find(*Assert(block_index.phashBlock))};
2270 [ - + ]: 1082279 : if (it != consensusparams.script_flag_exceptions.end()) {
2271 : 0 : flags = it->second;
2272 : : }
2273 : :
2274 : : // Enforce the DERSIG (BIP66) rule
2275 [ + + ]: 1082279 : if (DeploymentActiveAt(block_index, chainman, Consensus::DEPLOYMENT_DERSIG)) {
2276 : 1082275 : flags |= SCRIPT_VERIFY_DERSIG;
2277 : : }
2278 : :
2279 : : // Enforce CHECKLOCKTIMEVERIFY (BIP65)
2280 [ + + ]: 1082279 : if (DeploymentActiveAt(block_index, chainman, Consensus::DEPLOYMENT_CLTV)) {
2281 : 1082275 : flags |= SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY;
2282 : : }
2283 : :
2284 : : // Enforce CHECKSEQUENCEVERIFY (BIP112)
2285 [ + + ]: 1082279 : if (DeploymentActiveAt(block_index, chainman, Consensus::DEPLOYMENT_CSV)) {
2286 : 1082275 : flags |= SCRIPT_VERIFY_CHECKSEQUENCEVERIFY;
2287 : : }
2288 : :
2289 : : // Enforce BIP147 NULLDUMMY (activated simultaneously with segwit)
2290 [ + - ]: 1082279 : if (DeploymentActiveAt(block_index, chainman, Consensus::DEPLOYMENT_SEGWIT)) {
2291 : 1082279 : flags |= SCRIPT_VERIFY_NULLDUMMY;
2292 : : }
2293 : :
2294 : 1082279 : return flags;
2295 : : }
2296 : :
2297 : :
2298 : : /** Apply the effects of this block (with given index) on the UTXO set represented by coins.
2299 : : * Validity checks that depend on the UTXO set are also done; ConnectBlock()
2300 : : * can fail if those validity checks fail (among other reasons). */
2301 : 698190 : bool Chainstate::ConnectBlock(const CBlock& block, BlockValidationState& state, CBlockIndex* pindex,
2302 : : CCoinsViewCache& view, bool fJustCheck)
2303 : : {
2304 : 698190 : AssertLockHeld(cs_main);
2305 [ - + ]: 698190 : assert(pindex);
2306 : :
2307 : 698190 : uint256 block_hash{block.GetHash()};
2308 [ - + ]: 698190 : assert(*pindex->phashBlock == block_hash);
2309 : :
2310 : 698190 : const auto time_start{SteadyClock::now()};
2311 : 698190 : const CChainParams& params{m_chainman.GetParams()};
2312 : :
2313 : : // Check it again in case a previous version let a bad block in
2314 : : // NOTE: We don't currently (re-)invoke ContextualCheckBlock() or
2315 : : // ContextualCheckBlockHeader() here. This means that if we add a new
2316 : : // consensus rule that is enforced in one of those two functions, then we
2317 : : // may have let in a block that violates the rule prior to updating the
2318 : : // software, and we would NOT be enforcing the rule here. Fully solving
2319 : : // upgrade from one software version to the next after a consensus rule
2320 : : // change is potentially tricky and issue-specific (see NeedsRedownload()
2321 : : // for one approach that was used for BIP 141 deployment).
2322 : : // Also, currently the rule against blocks more than 2 hours in the future
2323 : : // is enforced in ContextualCheckBlockHeader(); we wouldn't want to
2324 : : // re-enforce that rule here (at least until we make it impossible for
2325 : : // the clock to go backward).
2326 [ - + ]: 698190 : if (!CheckBlock(block, state, params.GetConsensus(), !fJustCheck, !fJustCheck)) {
2327 [ # # ]: 0 : if (state.GetResult() == BlockValidationResult::BLOCK_MUTATED) {
2328 : : // We don't write down blocks to disk if they may have been
2329 : : // corrupted, so this should be impossible unless we're having hardware
2330 : : // problems.
2331 [ # # ]: 0 : return FatalError(m_chainman.GetNotifications(), state, _("Corrupt block found indicating potential hardware failure."));
2332 : : }
2333 [ # # ]: 0 : LogError("%s: Consensus::CheckBlock: %s\n", __func__, state.ToString());
2334 : 0 : return false;
2335 : : }
2336 : :
2337 : : // verify that the view's current state corresponds to the previous block
2338 [ + + ]: 698190 : uint256 hashPrevBlock = pindex->pprev == nullptr ? uint256() : pindex->pprev->GetBlockHash();
2339 [ - + ]: 698190 : assert(hashPrevBlock == view.GetBestBlock());
2340 : :
2341 : 698190 : m_chainman.num_blocks_total++;
2342 : :
2343 : : // Special case for the genesis block, skipping connection of its transactions
2344 : : // (its coinbase is unspendable)
2345 [ + + ]: 698190 : if (block_hash == params.GetConsensus().hashGenesisBlock) {
2346 [ + - ]: 3211 : if (!fJustCheck)
2347 : 3211 : view.SetBestBlock(pindex->GetBlockHash());
2348 : 3211 : return true;
2349 : : }
2350 : :
2351 : 694979 : const char* script_check_reason;
2352 [ + - ]: 1389958 : if (m_chainman.AssumedValidBlock().IsNull()) {
2353 : 694979 : script_check_reason = "assumevalid=0 (always verify)";
2354 : : } else {
2355 : 0 : constexpr int64_t TWO_WEEKS_IN_SECONDS{60 * 60 * 24 * 7 * 2};
2356 : : // We've been configured with the hash of a block which has been externally verified to have a valid history.
2357 : : // A suitable default value is included with the software and updated from time to time. Because validity
2358 : : // relative to a piece of software is an objective fact these defaults can be easily reviewed.
2359 : : // This setting doesn't force the selection of any particular chain but makes validating some faster by
2360 : : // effectively caching the result of part of the verification.
2361 [ # # ]: 0 : BlockMap::const_iterator it{m_blockman.m_block_index.find(m_chainman.AssumedValidBlock())};
2362 [ # # ]: 0 : if (it == m_blockman.m_block_index.end()) {
2363 : 0 : script_check_reason = "assumevalid hash not in headers";
2364 [ # # ]: 0 : } else if (it->second.GetAncestor(pindex->nHeight) != pindex) {
2365 [ # # ]: 0 : script_check_reason = (pindex->nHeight > it->second.nHeight) ? "block height above assumevalid height" : "block not in assumevalid chain";
2366 [ # # ]: 0 : } else if (m_chainman.m_best_header->GetAncestor(pindex->nHeight) != pindex) {
2367 : 0 : script_check_reason = "block not in best header chain";
2368 [ # # ]: 0 : } else if (m_chainman.m_best_header->nChainWork < m_chainman.MinimumChainWork()) {
2369 : 0 : script_check_reason = "best header chainwork below minimumchainwork";
2370 [ # # ]: 0 : } else if (GetBlockProofEquivalentTime(*m_chainman.m_best_header, *pindex, *m_chainman.m_best_header, params.GetConsensus()) <= TWO_WEEKS_IN_SECONDS) {
2371 : 0 : script_check_reason = "block too recent relative to best header";
2372 : : } else {
2373 : : // This block is a member of the assumed verified chain and an ancestor of the best header.
2374 : : // Script verification is skipped when connecting blocks under the
2375 : : // assumevalid block. Assuming the assumevalid block is valid this
2376 : : // is safe because block merkle hashes are still computed and checked,
2377 : : // Of course, if an assumed valid block is invalid due to false scriptSigs
2378 : : // this optimization would allow an invalid chain to be accepted.
2379 : : // The equivalent time check discourages hash power from extorting the network via DOS attack
2380 : : // into accepting an invalid block through telling users they must manually set assumevalid.
2381 : : // Requiring a software change or burying the invalid block, regardless of the setting, makes
2382 : : // it hard to hide the implication of the demand. This also avoids having release candidates
2383 : : // that are hardly doing any signature verification at all in testing without having to
2384 : : // artificially set the default assumed verified block further back.
2385 : : // The test against the minimum chain work prevents the skipping when denied access to any chain at
2386 : : // least as good as the expected chain.
2387 : 0 : script_check_reason = nullptr;
2388 : : }
2389 : : }
2390 : :
2391 : 694979 : const auto time_1{SteadyClock::now()};
2392 : 694979 : m_chainman.time_check += time_1 - time_start;
2393 [ + + ]: 694979 : LogDebug(BCLog::BENCH, " - Sanity checks: %.2fms [%.2fs (%.2fms/blk)]\n",
2394 : : Ticks<MillisecondsDouble>(time_1 - time_start),
2395 : : Ticks<SecondsDouble>(m_chainman.time_check),
2396 : : Ticks<MillisecondsDouble>(m_chainman.time_check) / m_chainman.num_blocks_total);
2397 : :
2398 : : // Do not allow blocks that contain transactions which 'overwrite' older transactions,
2399 : : // unless those are already completely spent.
2400 : : // If such overwrites are allowed, coinbases and transactions depending upon those
2401 : : // can be duplicated to remove the ability to spend the first instance -- even after
2402 : : // being sent to another address.
2403 : : // See BIP30, CVE-2012-1909, and https://r6.ca/blog/20120206T005236Z.html for more information.
2404 : : // This rule was originally applied to all blocks with a timestamp after March 15, 2012, 0:00 UTC.
2405 : : // Now that the whole chain is irreversibly beyond that time it is applied to all blocks except the
2406 : : // two in the chain that violate it. This prevents exploiting the issue against nodes during their
2407 : : // initial block download.
2408 : 694979 : bool fEnforceBIP30 = !IsBIP30Repeat(*pindex);
2409 : :
2410 : : // Once BIP34 activated it was not possible to create new duplicate coinbases and thus other than starting
2411 : : // with the 2 existing duplicate coinbase pairs, not possible to create overwriting txs. But by the
2412 : : // time BIP34 activated, in each of the existing pairs the duplicate coinbase had overwritten the first
2413 : : // before the first had been spent. Since those coinbases are sufficiently buried it's no longer possible to create further
2414 : : // duplicate transactions descending from the known pairs either.
2415 : : // If we're on the known chain at height greater than where BIP34 activated, we can save the db accesses needed for the BIP30 check.
2416 : :
2417 : : // BIP34 requires that a block at height X (block X) has its coinbase
2418 : : // scriptSig start with a CScriptNum of X (indicated height X). The above
2419 : : // logic of no longer requiring BIP30 once BIP34 activates is flawed in the
2420 : : // case that there is a block X before the BIP34 height of 227,931 which has
2421 : : // an indicated height Y where Y is greater than X. The coinbase for block
2422 : : // X would also be a valid coinbase for block Y, which could be a BIP30
2423 : : // violation. An exhaustive search of all mainnet coinbases before the
2424 : : // BIP34 height which have an indicated height greater than the block height
2425 : : // reveals many occurrences. The 3 lowest indicated heights found are
2426 : : // 209,921, 490,897, and 1,983,702 and thus coinbases for blocks at these 3
2427 : : // heights would be the first opportunity for BIP30 to be violated.
2428 : :
2429 : : // The search reveals a great many blocks which have an indicated height
2430 : : // greater than 1,983,702, so we simply remove the optimization to skip
2431 : : // BIP30 checking for blocks at height 1,983,702 or higher. Before we reach
2432 : : // that block in another 25 years or so, we should take advantage of a
2433 : : // future consensus change to do a new and improved version of BIP34 that
2434 : : // will actually prevent ever creating any duplicate coinbases in the
2435 : : // future.
2436 : 694979 : static constexpr int BIP34_IMPLIES_BIP30_LIMIT = 1983702;
2437 : :
2438 : : // There is no potential to create a duplicate coinbase at block 209,921
2439 : : // because this is still before the BIP34 height and so explicit BIP30
2440 : : // checking is still active.
2441 : :
2442 : : // The final case is block 176,684 which has an indicated height of
2443 : : // 490,897. Unfortunately, this issue was not discovered until about 2 weeks
2444 : : // before block 490,897 so there was not much opportunity to address this
2445 : : // case other than to carefully analyze it and determine it would not be a
2446 : : // problem. Block 490,897 was, in fact, mined with a different coinbase than
2447 : : // block 176,684, but it is important to note that even if it hadn't been or
2448 : : // is remined on an alternate fork with a duplicate coinbase, we would still
2449 : : // not run into a BIP30 violation. This is because the coinbase for 176,684
2450 : : // is spent in block 185,956 in transaction
2451 : : // d4f7fbbf92f4a3014a230b2dc70b8058d02eb36ac06b4a0736d9d60eaa9e8781. This
2452 : : // spending transaction can't be duplicated because it also spends coinbase
2453 : : // 0328dd85c331237f18e781d692c92de57649529bd5edf1d01036daea32ffde29. This
2454 : : // coinbase has an indicated height of over 4.2 billion, and wouldn't be
2455 : : // duplicatable until that height, and it's currently impossible to create a
2456 : : // chain that long. Nevertheless we may wish to consider a future soft fork
2457 : : // which retroactively prevents block 490,897 from creating a duplicate
2458 : : // coinbase. The two historical BIP30 violations often provide a confusing
2459 : : // edge case when manipulating the UTXO and it would be simpler not to have
2460 : : // another edge case to deal with.
2461 : :
2462 : : // testnet3 has no blocks before the BIP34 height with indicated heights
2463 : : // post BIP34 before approximately height 486,000,000. After block
2464 : : // 1,983,702 testnet3 starts doing unnecessary BIP30 checking again.
2465 [ - + ]: 694979 : assert(pindex->pprev);
2466 : 694979 : CBlockIndex* pindexBIP34height = pindex->pprev->GetAncestor(params.GetConsensus().BIP34Height);
2467 : : //Only continue to enforce if we're below BIP34 activation height or the block hash at that height doesn't correspond.
2468 [ + - + + : 694979 : fEnforceBIP30 = fEnforceBIP30 && (!pindexBIP34height || !(pindexBIP34height->GetBlockHash() == params.GetConsensus().BIP34Hash));
- + ]
2469 : :
2470 : : // TODO: Remove BIP30 checking from block height 1,983,702 on, once we have a
2471 : : // consensus change that ensures coinbases at those heights cannot
2472 : : // duplicate earlier coinbases.
2473 [ # # ]: 0 : if (fEnforceBIP30 || pindex->nHeight >= BIP34_IMPLIES_BIP30_LIMIT) {
2474 [ + + ]: 1452569 : for (const auto& tx : block.vtx) {
2475 [ - + + + ]: 2440588 : for (size_t o = 0; o < tx->vout.size(); o++) {
2476 [ + + ]: 1682998 : if (view.HaveCoin(COutPoint(tx->GetHash(), o))) {
2477 [ + - + - ]: 396 : state.Invalid(BlockValidationResult::BLOCK_CONSENSUS, "bad-txns-BIP30",
2478 : 396 : "tried to overwrite transaction");
2479 : : }
2480 : : }
2481 : : }
2482 : : }
2483 : :
2484 : : // Enforce BIP68 (sequence locks)
2485 : 694979 : int nLockTimeFlags = 0;
2486 [ + - ]: 694979 : if (DeploymentActiveAt(*pindex, m_chainman, Consensus::DEPLOYMENT_CSV)) {
2487 : 694979 : nLockTimeFlags |= LOCKTIME_VERIFY_SEQUENCE;
2488 : : }
2489 : :
2490 : : // Get the script flags for this block
2491 : 694979 : script_verify_flags flags{GetBlockScriptFlags(*pindex, m_chainman)};
2492 : :
2493 : 694979 : const auto time_2{SteadyClock::now()};
2494 : 694979 : m_chainman.time_forks += time_2 - time_1;
2495 [ + + ]: 694979 : LogDebug(BCLog::BENCH, " - Fork checks: %.2fms [%.2fs (%.2fms/blk)]\n",
2496 : : Ticks<MillisecondsDouble>(time_2 - time_1),
2497 : : Ticks<SecondsDouble>(m_chainman.time_forks),
2498 : : Ticks<MillisecondsDouble>(m_chainman.time_forks) / m_chainman.num_blocks_total);
2499 : :
2500 : 694979 : const bool fScriptChecks{!!script_check_reason};
2501 : 694979 : const kernel::ChainstateRole role{GetRole()};
2502 [ + + + - : 694979 : if (script_check_reason != m_last_script_check_reason_logged && role.validated && !role.historical) {
+ - ]
2503 [ + - ]: 2552 : if (fScriptChecks) {
2504 [ + - ]: 2552 : LogInfo("Enabling script verification at block #%d (%s): %s.",
2505 : : pindex->nHeight, block_hash.ToString(), script_check_reason);
2506 : : } else {
2507 [ # # ]: 0 : LogInfo("Disabling script verification at block #%d (%s).",
2508 : : pindex->nHeight, block_hash.ToString());
2509 : : }
2510 : 2552 : m_last_script_check_reason_logged = script_check_reason;
2511 : : }
2512 : :
2513 : 694979 : CBlockUndo blockundo;
2514 : :
2515 : : // Precomputed transaction data pointers must not be invalidated
2516 : : // until after `control` has run the script checks (potentially
2517 : : // in multiple threads). Preallocate the vector size so a new allocation
2518 : : // doesn't invalidate pointers into the vector, and keep txsdata in scope
2519 : : // for as long as `control`.
2520 [ - + + - ]: 694979 : std::vector<PrecomputedTransactionData> txsdata(block.vtx.size());
2521 : 694979 : std::optional<CCheckQueueControl<CScriptCheck>> control;
2522 [ - + - - : 694979 : if (auto& queue = m_chainman.GetCheckQueue(); queue.HasThreads() && fScriptChecks) control.emplace(queue);
- - ]
2523 : :
2524 : 694979 : std::vector<int> prevheights;
2525 : 694979 : CAmount nFees = 0;
2526 : 694979 : int nInputs = 0;
2527 : 694979 : int64_t nSigOpsCost = 0;
2528 [ - + + - ]: 694979 : blockundo.vtxundo.reserve(block.vtx.size() - 1);
2529 [ - + + + ]: 1438951 : for (unsigned int i = 0; i < block.vtx.size(); i++)
2530 : : {
2531 [ + + ]: 753124 : if (!state.IsValid()) break;
2532 [ - + ]: 752927 : const CTransaction &tx = *(block.vtx[i]);
2533 : :
2534 [ - + ]: 752927 : nInputs += tx.vin.size();
2535 : :
2536 [ + + ]: 752927 : if (!tx.IsCoinBase())
2537 : : {
2538 : 58145 : CAmount txfee = 0;
2539 [ + - ]: 58145 : TxValidationState tx_state;
2540 [ + - + + ]: 58145 : if (!Consensus::CheckTxInputs(tx, tx_state, view, pindex->nHeight, txfee)) {
2541 : : // Any transaction validation failure in ConnectBlock is a block consensus failure
2542 : 17906 : state.Invalid(BlockValidationResult::BLOCK_CONSENSUS,
2543 [ + - ]: 17906 : tx_state.GetRejectReason(),
2544 [ + - - + : 35812 : tx_state.GetDebugMessage() + " in transaction " + tx.GetHash().ToString());
+ - + - ]
2545 : 8953 : break;
2546 : : }
2547 : 49192 : nFees += txfee;
2548 [ - + ]: 49192 : if (!MoneyRange(nFees)) {
2549 [ # # # # ]: 0 : state.Invalid(BlockValidationResult::BLOCK_CONSENSUS, "bad-txns-accumulated-fee-outofrange",
2550 [ # # ]: 0 : "accumulated fee in the block out of range");
2551 : 0 : break;
2552 : : }
2553 : :
2554 : : // Check that transaction is BIP68 final
2555 : : // BIP68 lock checks (as opposed to nLockTime checks) must
2556 : : // be in ConnectBlock because they require the UTXO set
2557 [ - + + - ]: 49192 : prevheights.resize(tx.vin.size());
2558 [ - + + + ]: 122834 : for (size_t j = 0; j < tx.vin.size(); j++) {
2559 [ + - ]: 73642 : prevheights[j] = view.AccessCoin(tx.vin[j].prevout).nHeight;
2560 : : }
2561 : :
2562 [ + - + + ]: 49192 : if (!SequenceLocks(tx, nLockTimeFlags, prevheights, *pindex)) {
2563 [ + - + - ]: 4 : state.Invalid(BlockValidationResult::BLOCK_CONSENSUS, "bad-txns-nonfinal",
2564 [ + - + - ]: 4 : "contains a non-BIP68-final transaction " + tx.GetHash().ToString());
2565 : 2 : break;
2566 : : }
2567 : 58145 : }
2568 : :
2569 : : // GetTransactionSigOpCost counts 3 types of sigops:
2570 : : // * legacy (always)
2571 : : // * p2sh (when P2SH enabled in flags and excludes coinbase)
2572 : : // * witness (when witness enabled in flags and excludes coinbase)
2573 [ + - ]: 743972 : nSigOpsCost += GetTransactionSigOpCost(tx, view, flags);
2574 [ - + ]: 743972 : if (nSigOpsCost > MAX_BLOCK_SIGOPS_COST) {
2575 [ # # # # : 0 : state.Invalid(BlockValidationResult::BLOCK_CONSENSUS, "bad-blk-sigops", "too many sigops");
# # ]
2576 : 0 : break;
2577 : : }
2578 : :
2579 [ + + + - ]: 743972 : if (!tx.IsCoinBase() && fScriptChecks)
2580 : : {
2581 : 49190 : bool fCacheResults = fJustCheck; /* Don't cache results if we're actually connecting blocks (still consult the cache, though) */
2582 : 49190 : bool tx_ok;
2583 [ - + ]: 49190 : TxValidationState tx_state;
2584 : : // If CheckInputScripts is called with a pointer to a checks vector, the resulting checks are appended to it. In that case
2585 : : // they need to be added to control which runs them asynchronously. Otherwise, CheckInputScripts runs the checks before returning.
2586 [ - + ]: 49190 : if (control) {
2587 : 0 : std::vector<CScriptCheck> vChecks;
2588 [ # # ]: 0 : tx_ok = CheckInputScripts(tx, tx_state, view, flags, fCacheResults, fCacheResults, txsdata[i], m_chainman.m_validation_cache, &vChecks);
2589 [ # # # # ]: 0 : if (tx_ok) control->Add(std::move(vChecks));
2590 : 0 : } else {
2591 [ + - ]: 49190 : tx_ok = CheckInputScripts(tx, tx_state, view, flags, fCacheResults, fCacheResults, txsdata[i], m_chainman.m_validation_cache);
2592 : : }
2593 [ - + ]: 49190 : if (!tx_ok) {
2594 : : // Any transaction validation failure in ConnectBlock is a block consensus failure
2595 [ # # ]: 0 : state.Invalid(BlockValidationResult::BLOCK_CONSENSUS,
2596 [ # # # # ]: 0 : tx_state.GetRejectReason(), tx_state.GetDebugMessage());
2597 : 0 : break;
2598 : : }
2599 : 49190 : }
2600 : :
2601 : 743972 : CTxUndo undoDummy;
2602 [ + + ]: 743972 : if (i > 0) {
2603 [ + - ]: 49190 : blockundo.vtxundo.emplace_back();
2604 : : }
2605 [ + + + - ]: 743972 : UpdateCoins(tx, view, i == 0 ? undoDummy : blockundo.vtxundo.back(), pindex->nHeight);
2606 : 743972 : }
2607 : 694979 : const auto time_3{SteadyClock::now()};
2608 [ + - ]: 694979 : m_chainman.time_connect += time_3 - time_2;
2609 [ + - + + : 694979 : LogDebug(BCLog::BENCH, " - Connect %u transactions: %.2fms (%.3fms/tx, %.3fms/txin) [%.2fs (%.2fms/blk)]\n", (unsigned)block.vtx.size(),
+ + - + +
- ]
2610 : : Ticks<MillisecondsDouble>(time_3 - time_2), Ticks<MillisecondsDouble>(time_3 - time_2) / block.vtx.size(),
2611 : : nInputs <= 1 ? 0 : Ticks<MillisecondsDouble>(time_3 - time_2) / (nInputs - 1),
2612 : : Ticks<SecondsDouble>(m_chainman.time_connect),
2613 : : Ticks<MillisecondsDouble>(m_chainman.time_connect) / m_chainman.num_blocks_total);
2614 : :
2615 [ + - ]: 694979 : CAmount blockReward = nFees + GetBlockSubsidy(pindex->nHeight, params.GetConsensus());
2616 [ + - - + : 694979 : if (block.vtx[0]->GetValueOut() > blockReward && state.IsValid()) {
- - ]
2617 [ # # # # ]: 0 : state.Invalid(BlockValidationResult::BLOCK_CONSENSUS, "bad-cb-amount",
2618 [ # # # # ]: 0 : strprintf("coinbase pays too much (actual=%d vs limit=%d)", block.vtx[0]->GetValueOut(), blockReward));
2619 : : }
2620 [ - + ]: 694979 : if (control) {
2621 [ # # ]: 0 : auto parallel_result = control->Complete();
2622 [ # # # # ]: 0 : if (parallel_result.has_value() && state.IsValid()) {
2623 [ # # # # : 0 : state.Invalid(BlockValidationResult::BLOCK_CONSENSUS, strprintf("block-script-verify-flag-failed (%s)", ScriptErrorString(parallel_result->first)), parallel_result->second);
# # ]
2624 : : }
2625 : 0 : }
2626 [ + + ]: 694979 : if (!state.IsValid()) {
2627 [ + - + - ]: 9152 : LogInfo("Block validation error: %s", state.ToString());
2628 : 9152 : return false;
2629 : : }
2630 : 685827 : const auto time_4{SteadyClock::now()};
2631 [ + - ]: 685827 : m_chainman.time_verify += time_4 - time_2;
2632 [ + - + + : 685827 : LogDebug(BCLog::BENCH, " - Verify %u txins: %.2fms (%.3fms/txin) [%.2fs (%.2fms/blk)]\n", nInputs - 1,
+ + + - ]
2633 : : Ticks<MillisecondsDouble>(time_4 - time_2),
2634 : : nInputs <= 1 ? 0 : Ticks<MillisecondsDouble>(time_4 - time_2) / (nInputs - 1),
2635 : : Ticks<SecondsDouble>(m_chainman.time_verify),
2636 : : Ticks<MillisecondsDouble>(m_chainman.time_verify) / m_chainman.num_blocks_total);
2637 : :
2638 [ + + ]: 685827 : if (fJustCheck) {
2639 : : return true;
2640 : : }
2641 : :
2642 [ + - + - ]: 323169 : if (!m_blockman.WriteBlockUndo(blockundo, state, *pindex)) {
2643 : : return false;
2644 : : }
2645 : :
2646 : 323169 : const auto time_5{SteadyClock::now()};
2647 [ + - ]: 323169 : m_chainman.time_undo += time_5 - time_4;
2648 [ + - + + : 323169 : LogDebug(BCLog::BENCH, " - Write undo data: %.2fms [%.2fs (%.2fms/blk)]\n",
+ - ]
2649 : : Ticks<MillisecondsDouble>(time_5 - time_4),
2650 : : Ticks<SecondsDouble>(m_chainman.time_undo),
2651 : : Ticks<MillisecondsDouble>(m_chainman.time_undo) / m_chainman.num_blocks_total);
2652 : :
2653 [ + - + - ]: 323169 : if (!pindex->IsValid(BLOCK_VALID_SCRIPTS)) {
2654 : 323169 : pindex->RaiseValidity(BLOCK_VALID_SCRIPTS);
2655 [ + - ]: 323169 : m_blockman.m_dirty_blockindex.insert(pindex);
2656 : : }
2657 : :
2658 : : // add this block to the view's block chain
2659 [ + - ]: 323169 : view.SetBestBlock(pindex->GetBlockHash());
2660 : :
2661 : 323169 : const auto time_6{SteadyClock::now()};
2662 [ + - ]: 323169 : m_chainman.time_index += time_6 - time_5;
2663 [ + - + + : 694979 : LogDebug(BCLog::BENCH, " - Index writing: %.2fms [%.2fs (%.2fms/blk)]\n",
+ - ]
2664 : : Ticks<MillisecondsDouble>(time_6 - time_5),
2665 : : Ticks<SecondsDouble>(m_chainman.time_index),
2666 : : Ticks<MillisecondsDouble>(m_chainman.time_index) / m_chainman.num_blocks_total);
2667 : :
2668 : : TRACEPOINT(validation, block_connected,
2669 : : block_hash.data(),
2670 : : pindex->nHeight,
2671 : : block.vtx.size(),
2672 : : nInputs,
2673 : : nSigOpsCost,
2674 : : Ticks<std::chrono::nanoseconds>(time_5 - time_start)
2675 : : );
2676 : :
2677 : : return true;
2678 : 694979 : }
2679 : :
2680 : 3670769 : CoinsCacheSizeState Chainstate::GetCoinsCacheSizeState()
2681 : : {
2682 : 3670769 : AssertLockHeld(::cs_main);
2683 : 3670769 : return this->GetCoinsCacheSizeState(
2684 : : m_coinstip_cache_size_bytes,
2685 [ + + ]: 3670769 : m_mempool ? m_mempool->m_opts.max_size_bytes : 0);
2686 : : }
2687 : :
2688 : 3670769 : CoinsCacheSizeState Chainstate::GetCoinsCacheSizeState(
2689 : : size_t max_coins_cache_size_bytes,
2690 : : size_t max_mempool_size_bytes)
2691 : : {
2692 : 3670769 : AssertLockHeld(::cs_main);
2693 [ + + ]: 3670769 : const int64_t nMempoolUsage = m_mempool ? m_mempool->DynamicMemoryUsage() : 0;
2694 : 3670769 : int64_t cacheSize = CoinsTip().DynamicMemoryUsage();
2695 : 3670769 : int64_t nTotalSpace =
2696 [ + + ]: 3670769 : max_coins_cache_size_bytes + std::max<int64_t>(int64_t(max_mempool_size_bytes) - nMempoolUsage, 0);
2697 : :
2698 [ - + ]: 3670769 : if (cacheSize > nTotalSpace) {
2699 : 0 : LogInfo("Cache size (%s) exceeds total space (%s)\n", cacheSize, nTotalSpace);
2700 : 0 : return CoinsCacheSizeState::CRITICAL;
2701 [ + + - + ]: 3670821 : } else if (cacheSize > LargeCoinsCacheThreshold(nTotalSpace)) {
2702 : 0 : return CoinsCacheSizeState::LARGE;
2703 : : }
2704 : : return CoinsCacheSizeState::OK;
2705 : : }
2706 : :
2707 : 3670769 : bool Chainstate::FlushStateToDisk(
2708 : : BlockValidationState &state,
2709 : : FlushStateMode mode,
2710 : : int nManualPruneHeight)
2711 : : {
2712 : 3670769 : LOCK(cs_main);
2713 [ + - ]: 3670769 : assert(this->CanFlushToDisk());
2714 [ + - ]: 3670769 : std::set<int> setFilesToPrune;
2715 : 3670769 : bool full_flush_completed = false;
2716 : :
2717 [ + - + - ]: 3670769 : [[maybe_unused]] const size_t coins_count{CoinsTip().GetCacheSize()};
2718 [ + - + - ]: 3670769 : [[maybe_unused]] const size_t coins_mem_usage{CoinsTip().DynamicMemoryUsage()};
2719 : :
2720 : 3670769 : try {
2721 : 3670769 : {
2722 : 3670769 : bool fFlushForPrune = false;
2723 : :
2724 [ + - ]: 3670769 : CoinsCacheSizeState cache_state = GetCoinsCacheSizeState();
2725 [ - + - - : 3670769 : if (m_blockman.IsPruneMode() && (m_blockman.m_check_for_pruning || nManualPruneHeight > 0) && m_chainman.m_blockman.m_blockfiles_indexed) {
- - - - ]
2726 : : // make sure we don't prune above any of the prune locks bestblocks
2727 : : // pruning is height-based
2728 [ # # ]: 0 : int last_prune{m_chain.Height()}; // last height we can prune
2729 : 0 : std::optional<std::string> limiting_lock; // prune lock that actually was the limiting factor, only used for logging
2730 : :
2731 [ # # # # ]: 0 : for (const auto& prune_lock : m_blockman.m_prune_locks) {
2732 [ # # ]: 0 : if (prune_lock.second.height_first == std::numeric_limits<int>::max()) continue;
2733 : : // Remove the buffer and one additional block here to get actual height that is outside of the buffer
2734 : 0 : const int lock_height{prune_lock.second.height_first - PRUNE_LOCK_BUFFER - 1};
2735 [ # # # # ]: 0 : last_prune = std::max(1, std::min(last_prune, lock_height));
2736 [ # # ]: 0 : if (last_prune == lock_height) {
2737 [ # # ]: 0 : limiting_lock = prune_lock.first;
2738 : : }
2739 : : }
2740 : :
2741 [ # # ]: 0 : if (limiting_lock) {
2742 [ # # # # : 0 : LogDebug(BCLog::PRUNE, "%s limited pruning to height %d\n", limiting_lock.value(), last_prune);
# # # # ]
2743 : : }
2744 : :
2745 [ # # ]: 0 : if (nManualPruneHeight > 0) {
2746 [ # # # # : 0 : LOG_TIME_MILLIS_WITH_CATEGORY("find files to prune (manual)", BCLog::BENCH);
# # ]
2747 : :
2748 [ # # ]: 0 : m_blockman.FindFilesToPruneManual(
2749 : : setFilesToPrune,
2750 [ # # ]: 0 : std::min(last_prune, nManualPruneHeight),
2751 : : *this);
2752 : 0 : } else {
2753 [ # # # # : 0 : LOG_TIME_MILLIS_WITH_CATEGORY("find files to prune", BCLog::BENCH);
# # ]
2754 : :
2755 [ # # ]: 0 : m_blockman.FindFilesToPrune(setFilesToPrune, last_prune, *this, m_chainman);
2756 : 0 : m_blockman.m_check_for_pruning = false;
2757 : 0 : }
2758 [ # # ]: 0 : if (!setFilesToPrune.empty()) {
2759 : 0 : fFlushForPrune = true;
2760 [ # # ]: 0 : if (!m_blockman.m_have_pruned) {
2761 [ # # # # ]: 0 : m_blockman.m_block_tree_db->WriteFlag("prunedblockfiles", true);
2762 : 0 : m_blockman.m_have_pruned = true;
2763 : : }
2764 : : }
2765 : 0 : }
2766 : 3670769 : const auto nNow{NodeClock::now()};
2767 : : // The cache is large and we're within 10% and 10 MiB of the limit, but we have time now (not in the middle of a block processing).
2768 : 3670769 : bool fCacheLarge = mode == FlushStateMode::PERIODIC && cache_state >= CoinsCacheSizeState::LARGE;
2769 : : // The cache is over the limit, we have to write now.
2770 : 3670769 : bool fCacheCritical = mode == FlushStateMode::IF_NEEDED && cache_state >= CoinsCacheSizeState::CRITICAL;
2771 : : // It's been a while since we wrote the block index and chain state to disk. Do this frequently, so we don't need to redownload or reindex after a crash.
2772 [ + + + + ]: 3670769 : bool fPeriodicWrite = mode == FlushStateMode::PERIODIC && nNow >= m_next_write;
2773 [ + + + - ]: 3670769 : const auto empty_cache{(mode == FlushStateMode::FORCE_FLUSH) || fCacheLarge || fCacheCritical};
2774 : : // Combine all conditions that result in a write to disk.
2775 [ + + + + ]: 3670769 : bool should_write = (mode == FlushStateMode::FORCE_SYNC) || empty_cache || fPeriodicWrite || fFlushForPrune;
2776 : : // Write blocks, block index and best chain related state to disk.
2777 : 3552883 : if (should_write) {
2778 [ + - + + : 117886 : LogDebug(BCLog::COINDB, "Writing chainstate to disk: flush mode=%s, prune=%d, large=%d, critical=%d, periodic=%d",
+ - ]
2779 : : FlushStateModeNames[size_t(mode)], fFlushForPrune, fCacheLarge, fCacheCritical, fPeriodicWrite);
2780 : :
2781 : : // Ensure we can write block index
2782 [ + - - + ]: 117886 : if (!CheckDiskSpace(m_blockman.m_opts.blocks_dir)) {
2783 [ # # # # ]: 0 : return FatalError(m_chainman.GetNotifications(), state, _("Disk space is too low!"));
2784 : : }
2785 : 117886 : {
2786 [ + - + - : 235772 : LOG_TIME_MILLIS_WITH_CATEGORY("write block and undo data to disk", BCLog::BENCH);
+ - ]
2787 : :
2788 : : // First make sure all block and undo data is flushed to disk.
2789 : : // TODO: Handle return error, or add detailed comment why it is
2790 : : // safe to not return an error upon failure.
2791 [ - + + - : 117886 : if (!m_blockman.FlushChainstateBlockFile(m_chain.Height())) {
- + ]
2792 [ # # ]: 0 : LogWarning("%s: Failed to flush block file.\n", __func__);
2793 : : }
2794 : 117886 : }
2795 : :
2796 : : // Then update all block file information (which may refer to block and undo files).
2797 : 117886 : {
2798 [ + - + - : 235772 : LOG_TIME_MILLIS_WITH_CATEGORY("write block index to disk", BCLog::BENCH);
+ - ]
2799 : :
2800 [ + - ]: 117886 : m_blockman.WriteBlockIndexDB();
2801 : 117886 : }
2802 : : // Finally remove any pruned files
2803 [ - + ]: 117886 : if (fFlushForPrune) {
2804 [ # # # # : 0 : LOG_TIME_MILLIS_WITH_CATEGORY("unlink pruned files", BCLog::BENCH);
# # ]
2805 : :
2806 [ # # ]: 0 : m_blockman.UnlinkPrunedFiles(setFilesToPrune);
2807 : 0 : }
2808 : :
2809 [ + - + - : 235772 : if (!CoinsTip().GetBestBlock().IsNull()) {
+ - ]
2810 : : // Typical Coin structures on disk are around 48 bytes in size.
2811 : : // Pushing a new one to the database can cause it to be written
2812 : : // twice (once in the log, and once in the tables). This is already
2813 : : // an overestimation, as most will delete an existing entry or
2814 : : // overwrite one. Still, use a conservative safety factor of 2.
2815 [ + - + - : 117886 : if (!CheckDiskSpace(m_chainman.m_options.datadir, 48 * 2 * 2 * CoinsTip().GetDirtyCount())) {
- + ]
2816 [ # # # # ]: 0 : return FatalError(m_chainman.GetNotifications(), state, _("Disk space is too low!"));
2817 : : }
2818 : : // Flush the chainstate (which may refer to block index entries).
2819 [ + + + - : 117886 : empty_cache ? CoinsTip().Flush() : CoinsTip().Sync();
+ - + - +
- ]
2820 : : full_flush_completed = true;
2821 : : TRACEPOINT(utxocache, flush,
2822 : : int64_t{Ticks<std::chrono::microseconds>(NodeClock::now() - nNow)},
2823 : : (uint32_t)mode,
2824 : : (uint64_t)coins_count,
2825 : : (uint64_t)coins_mem_usage,
2826 : : (bool)fFlushForPrune);
2827 : : }
2828 : : }
2829 : :
2830 [ + + ]: 3552883 : if (should_write || m_next_write == NodeClock::time_point::max()) {
2831 : 121097 : constexpr auto range{DATABASE_WRITE_INTERVAL_MAX - DATABASE_WRITE_INTERVAL_MIN};
2832 : 121097 : m_next_write = FastRandomContext().rand_uniform_delay(NodeClock::now() + DATABASE_WRITE_INTERVAL_MIN, range);
2833 : : }
2834 : : }
2835 [ + + ]: 3670769 : if (full_flush_completed) {
2836 [ + + ]: 117886 : if (m_chainman.m_options.signals) {
2837 : : // Update best block in wallet (so we can detect restored wallets).
2838 [ - + + - : 346284 : m_chainman.m_options.signals->ChainStateFlushed(this->GetRole(), GetLocator(m_chain.Tip()));
+ - + - ]
2839 : : }
2840 : :
2841 [ + - + - : 117886 : if (!m_chainman.m_interrupt && ShouldCompactChainstate(m_chainman.IsInitialBlockDownload())) {
+ + ]
2842 : 55 : try {
2843 [ + - + - ]: 110 : CoinsDB().CompactFull();
2844 [ - - ]: 0 : } catch (const std::exception& e) {
2845 [ - - ]: 0 : LogWarning("Failed to start chainstate compaction (%s)", e.what());
2846 : 0 : }
2847 : : }
2848 : : }
2849 [ - - ]: 0 : } catch (const std::runtime_error& e) {
2850 [ - - - - ]: 0 : return FatalError(m_chainman.GetNotifications(), state, strprintf(_("System error while flushing: %s"), e.what()));
2851 : 0 : }
2852 : : return true;
2853 [ + - ]: 7341538 : }
2854 : :
2855 : 115315 : void Chainstate::ForceFlushStateToDisk(bool wipe_cache)
2856 : : {
2857 [ + + ]: 115315 : BlockValidationState state;
2858 [ + + + - : 183899 : if (!this->FlushStateToDisk(state, wipe_cache ? FlushStateMode::FORCE_FLUSH : FlushStateMode::FORCE_SYNC)) {
- + ]
2859 [ # # # # ]: 0 : LogWarning("Failed to force flush state (%s)", state.ToString());
2860 : : }
2861 : 115315 : }
2862 : :
2863 : 0 : void Chainstate::PruneAndFlush()
2864 : : {
2865 [ # # ]: 0 : BlockValidationState state;
2866 : 0 : m_blockman.m_check_for_pruning = true;
2867 [ # # # # ]: 0 : if (!this->FlushStateToDisk(state, FlushStateMode::NONE)) {
2868 [ # # # # ]: 0 : LogWarning("Failed to flush state (%s)", state.ToString());
2869 : : }
2870 : 0 : }
2871 : :
2872 : 326380 : static void UpdateTipLog(
2873 : : const ChainstateManager& chainman,
2874 : : const CCoinsViewCache& coins_tip,
2875 : : const CBlockIndex* tip,
2876 : : const std::string& func_name,
2877 : : const std::string& prefix,
2878 : : const std::string& warning_messages,
2879 : : const bool background_validation) EXCLUSIVE_LOCKS_REQUIRED(::cs_main)
2880 : : {
2881 : :
2882 : 326380 : AssertLockHeld(::cs_main);
2883 : :
2884 : : // Disable rate limiting as this may log frequently during IBD.
2885 [ - + + - : 326380 : LogInfo(util::log::NO_RATE_LIMIT, "%s%s: new best=%s height=%d version=0x%08x log2_work=%f tx=%lu date='%s' progress=%f cache=%.1fMiB(%utxo)%s\n",
+ - - + -
- + - + -
+ - + - +
- ]
2886 : : prefix, func_name,
2887 : : tip->GetBlockHash().ToString(), tip->nHeight, tip->nVersion,
2888 : : log(tip->nChainWork.getdouble()) / log(2.0), tip->m_chain_tx_count,
2889 : : FormatISO8601DateTime(tip->GetBlockTime()),
2890 : : background_validation ? chainman.GetBackgroundVerificationProgress(*tip) : chainman.GuessVerificationProgress(tip),
2891 : : coins_tip.DynamicMemoryUsage() / double(1_MiB),
2892 : : coins_tip.GetCacheSize(),
2893 : : !warning_messages.empty() ? strprintf(" warning='%s'", warning_messages) : "");
2894 : 326380 : }
2895 : :
2896 : 326380 : void Chainstate::UpdateTip(const CBlockIndex* pindexNew)
2897 : : {
2898 : 326380 : AssertLockHeld(::cs_main);
2899 : 326380 : const auto& coins_tip = this->CoinsTip();
2900 : :
2901 : : // The remainder of the function isn't relevant if we are not acting on
2902 : : // the active chainstate, so return if need be.
2903 [ - + ]: 326380 : if (this != &m_chainman.ActiveChainstate()) {
2904 : : // Only log every so often so that we don't bury log messages at the tip.
2905 : 0 : constexpr int BACKGROUND_LOG_INTERVAL = 2000;
2906 [ # # ]: 0 : if (pindexNew->nHeight % BACKGROUND_LOG_INTERVAL == 0) {
2907 [ # # # # : 0 : UpdateTipLog(m_chainman, coins_tip, pindexNew, __func__, "[background validation] ", "", /*background_validation=*/true);
# # ]
2908 : : }
2909 : 0 : return;
2910 : : }
2911 : :
2912 : : // New best block
2913 [ + - ]: 326380 : if (m_mempool) {
2914 : 326380 : m_mempool->AddTransactionsUpdated(1);
2915 : : }
2916 : :
2917 : 326380 : std::vector<bilingual_str> warning_messages;
2918 [ + + ]: 326380 : if (!m_chainman.IsInitialBlockDownload()) {
2919 [ + - ]: 250872 : auto bits = m_chainman.m_versionbitscache.CheckUnknownActivations(pindexNew, m_chainman.GetParams());
2920 [ - - - + ]: 250872 : for (auto [bit, active] : bits) {
2921 [ # # ]: 0 : const bilingual_str warning = strprintf(_("Unknown new rules activated (versionbit %i)"), bit);
2922 [ # # ]: 0 : if (active) {
2923 [ # # ]: 0 : m_chainman.GetNotifications().warningSet(kernel::Warning::UNKNOWN_NEW_RULES_ACTIVATED, warning);
2924 : : } else {
2925 [ # # ]: 0 : warning_messages.push_back(warning);
2926 : : }
2927 : 0 : }
2928 : 250872 : }
2929 [ + - + - : 652760 : UpdateTipLog(m_chainman, coins_tip, pindexNew, __func__, "",
+ - ]
2930 [ + - + - : 979140 : util::Join(warning_messages, Untranslated(", ")).original, /*background_validation=*/false);
+ - ]
2931 : 326380 : }
2932 : :
2933 : : /** Disconnect m_chain's tip.
2934 : : * After calling, the mempool will be in an inconsistent state, with
2935 : : * transactions from disconnected blocks being added to disconnectpool. You
2936 : : * should make the mempool consistent again by calling MaybeUpdateMempoolForReorg.
2937 : : * with cs_main held.
2938 : : *
2939 : : * If disconnectpool is nullptr, then no disconnected transactions are added to
2940 : : * disconnectpool (note that the caller is responsible for mempool consistency
2941 : : * in any case).
2942 : : */
2943 : 0 : bool Chainstate::DisconnectTip(BlockValidationState& state, DisconnectedBlockTransactions* disconnectpool)
2944 : : {
2945 : 0 : AssertLockHeld(cs_main);
2946 : 0 : if (m_mempool) AssertLockHeld(m_mempool->cs);
2947 : :
2948 [ # # ]: 0 : CBlockIndex *pindexDelete = m_chain.Tip();
2949 [ # # ]: 0 : assert(pindexDelete);
2950 [ # # ]: 0 : assert(pindexDelete->pprev);
2951 : : // Read block from disk.
2952 : 0 : std::shared_ptr<CBlock> pblock = std::make_shared<CBlock>();
2953 [ # # ]: 0 : CBlock& block = *pblock;
2954 [ # # # # ]: 0 : if (!m_blockman.ReadBlock(block, *pindexDelete)) {
2955 [ # # # # ]: 0 : LogError("DisconnectTip(): Failed to read block\n");
2956 : : return false;
2957 : : }
2958 : : // Apply the block atomically to the chain state.
2959 : 0 : const auto time_start{SteadyClock::now()};
2960 : 0 : {
2961 [ # # # # ]: 0 : CCoinsViewCache view(&CoinsTip());
2962 [ # # # # ]: 0 : assert(view.GetBestBlock() == pindexDelete->GetBlockHash());
2963 [ # # # # ]: 0 : if (DisconnectBlock(block, pindexDelete, view) != DISCONNECT_OK) {
2964 [ # # # # ]: 0 : LogError("DisconnectTip(): DisconnectBlock %s failed\n", pindexDelete->GetBlockHash().ToString());
2965 : 0 : return false;
2966 : : }
2967 [ # # ]: 0 : view.Flush(/*reallocate_cache=*/false); // local CCoinsViewCache goes out of scope
2968 : 0 : }
2969 [ # # # # : 0 : LogDebug(BCLog::BENCH, "- Disconnect block: %.2fms\n",
# # ]
2970 : : Ticks<MillisecondsDouble>(SteadyClock::now() - time_start));
2971 : :
2972 : 0 : {
2973 : : // Prune locks that began at or after the tip should be moved backward so they get a chance to reorg
2974 : 0 : const int max_height_first{pindexDelete->nHeight - 1};
2975 [ # # # # ]: 0 : for (auto& prune_lock : m_blockman.m_prune_locks) {
2976 [ # # ]: 0 : if (prune_lock.second.height_first <= max_height_first) continue;
2977 : :
2978 : 0 : prune_lock.second.height_first = max_height_first;
2979 [ # # # # : 0 : LogDebug(BCLog::PRUNE, "%s prune lock moved back to %d\n", prune_lock.first, max_height_first);
# # ]
2980 : : }
2981 : : }
2982 : :
2983 : : // Write the chain state to disk, if necessary.
2984 [ # # # # ]: 0 : if (!FlushStateToDisk(state, FlushStateMode::IF_NEEDED)) {
2985 : : return false;
2986 : : }
2987 : :
2988 [ # # # # ]: 0 : if (disconnectpool && m_mempool) {
2989 : : // Save transactions to re-add to mempool at end of reorg. If any entries are evicted for
2990 : : // exceeding memory limits, remove them and their descendants from the mempool.
2991 [ # # # # ]: 0 : for (auto&& evicted_tx : disconnectpool->AddTransactionsFromBlock(block.vtx)) {
2992 [ # # ]: 0 : m_mempool->removeRecursive(*evicted_tx, MemPoolRemovalReason::REORG);
2993 : : }
2994 : : }
2995 : :
2996 [ # # ]: 0 : m_chain.SetTip(*pindexDelete->pprev);
2997 [ # # ]: 0 : m_chainman.UpdateIBDStatus();
2998 : :
2999 [ # # ]: 0 : UpdateTip(pindexDelete->pprev);
3000 : : // Let wallets know transactions went from 1-confirmed to
3001 : : // 0-confirmed or conflicted:
3002 [ # # ]: 0 : if (m_chainman.m_options.signals) {
3003 [ # # ]: 0 : m_chainman.m_options.signals->BlockDisconnected(std::move(pblock), pindexDelete);
3004 : : }
3005 : : return true;
3006 : 0 : }
3007 : :
3008 [ - - + + ]: 327019 : struct ConnectedBlock {
3009 : : const CBlockIndex* pindex;
3010 : : std::shared_ptr<const CBlock> pblock;
3011 : : };
3012 : :
3013 : : /**
3014 : : * Connect a new block to m_chain. block_to_connect is either nullptr or a pointer to a CBlock
3015 : : * corresponding to pindexNew, to bypass loading it again from disk.
3016 : : *
3017 : : * The block is added to connected_blocks if connection succeeds.
3018 : : */
3019 : 335532 : bool Chainstate::ConnectTip(
3020 : : BlockValidationState& state,
3021 : : CBlockIndex* pindexNew,
3022 : : std::shared_ptr<const CBlock> block_to_connect,
3023 : : std::vector<ConnectedBlock>& connected_blocks,
3024 : : DisconnectedBlockTransactions& disconnectpool)
3025 : : {
3026 : 335532 : AssertLockHeld(cs_main);
3027 : 335532 : if (m_mempool) AssertLockHeld(m_mempool->cs);
3028 : :
3029 [ - + - + ]: 671064 : assert(pindexNew->pprev == m_chain.Tip());
3030 : : // Read block from disk.
3031 : 335532 : const auto time_1{SteadyClock::now()};
3032 [ + + ]: 335532 : if (!block_to_connect) {
3033 : 3237 : std::shared_ptr<CBlock> pblockNew = std::make_shared<CBlock>();
3034 [ + - - + ]: 3237 : if (!m_blockman.ReadBlock(*pblockNew, *pindexNew)) {
3035 [ # # # # : 0 : return FatalError(m_chainman.GetNotifications(), state, _("Failed to read block."));
# # ]
3036 : : }
3037 [ - + ]: 3237 : block_to_connect = std::move(pblockNew);
3038 : 3237 : } else {
3039 [ + + ]: 332295 : LogDebug(BCLog::BENCH, " - Using cached block\n");
3040 : : }
3041 : : // Apply the block atomically to the chain state.
3042 : 335532 : const auto time_2{SteadyClock::now()};
3043 : 335532 : SteadyClock::time_point time_3;
3044 : : // When adding aggregate statistics in the future, keep in mind that
3045 : : // num_blocks_total may be zero until the ConnectBlock() call below.
3046 [ + + ]: 335532 : LogDebug(BCLog::BENCH, " - Load block from disk: %.2fms\n",
3047 : : Ticks<MillisecondsDouble>(time_2 - time_1));
3048 : 335532 : {
3049 [ + - ]: 335532 : CCoinsViewCache& view{*m_coins_views->m_connect_block_view};
3050 [ + - ]: 335532 : const auto reset_guard{view.CreateResetGuard()};
3051 [ + - ]: 335532 : bool rv = ConnectBlock(*block_to_connect, state, pindexNew, view);
3052 [ + + ]: 335532 : if (m_chainman.m_options.signals) {
3053 [ + - ]: 334893 : m_chainman.m_options.signals->BlockChecked(block_to_connect, state);
3054 : : }
3055 [ + + ]: 335532 : if (!rv) {
3056 [ + - ]: 9152 : if (state.IsInvalid())
3057 [ + - ]: 9152 : InvalidBlockFound(pindexNew, state);
3058 [ + - + - : 9152 : LogError("%s: ConnectBlock %s failed, %s\n", __func__, pindexNew->GetBlockHash().ToString(), state.ToString());
+ - ]
3059 : 9152 : return false;
3060 : : }
3061 : 326380 : time_3 = SteadyClock::now();
3062 [ - + ]: 326380 : m_chainman.time_connect_total += time_3 - time_2;
3063 [ - + ]: 326380 : assert(m_chainman.num_blocks_total > 0);
3064 [ + - + + : 326380 : LogDebug(BCLog::BENCH, " - Connect total: %.2fms [%.2fs (%.2fms/blk)]\n",
+ - ]
3065 : : Ticks<MillisecondsDouble>(time_3 - time_2),
3066 : : Ticks<SecondsDouble>(m_chainman.time_connect_total),
3067 : : Ticks<MillisecondsDouble>(m_chainman.time_connect_total) / m_chainman.num_blocks_total);
3068 [ + - ]: 326380 : view.Flush(/*reallocate_cache=*/false); // No need to reallocate since it only has capacity for 1 block
3069 : 9152 : }
3070 : 326380 : const auto time_4{SteadyClock::now()};
3071 : 326380 : m_chainman.time_flush += time_4 - time_3;
3072 [ + + ]: 326380 : LogDebug(BCLog::BENCH, " - Flush: %.2fms [%.2fs (%.2fms/blk)]\n",
3073 : : Ticks<MillisecondsDouble>(time_4 - time_3),
3074 : : Ticks<SecondsDouble>(m_chainman.time_flush),
3075 : : Ticks<MillisecondsDouble>(m_chainman.time_flush) / m_chainman.num_blocks_total);
3076 : : // Write the chain state to disk, if necessary.
3077 [ + - ]: 326380 : if (!FlushStateToDisk(state, FlushStateMode::IF_NEEDED)) {
3078 : : return false;
3079 : : }
3080 : 326380 : const auto time_5{SteadyClock::now()};
3081 : 326380 : m_chainman.time_chainstate += time_5 - time_4;
3082 [ + + ]: 326380 : LogDebug(BCLog::BENCH, " - Writing chainstate: %.2fms [%.2fs (%.2fms/blk)]\n",
3083 : : Ticks<MillisecondsDouble>(time_5 - time_4),
3084 : : Ticks<SecondsDouble>(m_chainman.time_chainstate),
3085 : : Ticks<MillisecondsDouble>(m_chainman.time_chainstate) / m_chainman.num_blocks_total);
3086 : : // Remove conflicting transactions from the mempool.;
3087 [ + - ]: 326380 : if (m_mempool) {
3088 : 326380 : m_mempool->removeForBlock(block_to_connect->vtx, pindexNew->nHeight);
3089 : 326380 : disconnectpool.removeForBlock(block_to_connect->vtx);
3090 : : }
3091 : : // Update m_chain & related variables.
3092 : 326380 : m_chain.SetTip(*pindexNew);
3093 : 326380 : m_chainman.UpdateIBDStatus();
3094 : 326380 : UpdateTip(pindexNew);
3095 : :
3096 : 326380 : const auto time_6{SteadyClock::now()};
3097 : 326380 : m_chainman.time_post_connect += time_6 - time_5;
3098 : 326380 : m_chainman.time_total += time_6 - time_1;
3099 [ + + ]: 326380 : LogDebug(BCLog::BENCH, " - Connect postprocess: %.2fms [%.2fs (%.2fms/blk)]\n",
3100 : : Ticks<MillisecondsDouble>(time_6 - time_5),
3101 : : Ticks<SecondsDouble>(m_chainman.time_post_connect),
3102 : : Ticks<MillisecondsDouble>(m_chainman.time_post_connect) / m_chainman.num_blocks_total);
3103 [ + + ]: 326380 : LogDebug(BCLog::BENCH, "- Connect block: %.2fms [%.2fs (%.2fms/blk)]\n",
3104 : : Ticks<MillisecondsDouble>(time_6 - time_1),
3105 : : Ticks<SecondsDouble>(m_chainman.time_total),
3106 : : Ticks<MillisecondsDouble>(m_chainman.time_total) / m_chainman.num_blocks_total);
3107 : :
3108 : : // See if this chainstate has reached a target block and can be used to
3109 : : // validate an assumeutxo snapshot. If it can, hashing the UTXO database
3110 : : // will be slow, and cs_main could remain locked here for several minutes.
3111 : : // If the snapshot is validated, the UTXO hash will be saved to
3112 : : // this->m_target_utxohash, causing HistoricalChainstate() to return null
3113 : : // and this chainstate to no longer be used. ActivateBestChain() will also
3114 : : // stop connecting blocks to this chainstate because this->ReachedTarget()
3115 : : // will be true and this->setBlockIndexCandidates will not have additional
3116 : : // blocks.
3117 : 326380 : Chainstate& current_cs{m_chainman.CurrentChainstate()};
3118 : 326380 : m_chainman.MaybeValidateSnapshot(*this, current_cs);
3119 : :
3120 : 326380 : connected_blocks.emplace_back(pindexNew, std::move(block_to_connect));
3121 : 326380 : return true;
3122 : : }
3123 : :
3124 : : /**
3125 : : * Return the tip of the chain with the most work in it, that isn't
3126 : : * known to be invalid (it's however far from certain to be valid).
3127 : : */
3128 : 356135 : CBlockIndex* Chainstate::FindMostWorkChain()
3129 : : {
3130 : 356135 : AssertLockHeld(::cs_main);
3131 : 356568 : do {
3132 : 356568 : CBlockIndex *pindexNew = nullptr;
3133 : :
3134 : : // Find the best candidate header.
3135 : 356568 : {
3136 [ + - ]: 356568 : std::set<CBlockIndex*, CBlockIndexWorkComparator>::reverse_iterator it = setBlockIndexCandidates.rbegin();
3137 [ + - ]: 356568 : if (it == setBlockIndexCandidates.rend())
3138 : : return nullptr;
3139 : 356568 : pindexNew = *it;
3140 : : }
3141 : :
3142 : : // Check whether all blocks on the path between the currently active chain and the candidate are valid.
3143 : : // Just going until the active chain is an optimization, as we know all blocks in it are valid already.
3144 : 356568 : bool fInvalidAncestor = false;
3145 [ + + + + ]: 695913 : for (CBlockIndex *pindexTest = pindexNew; pindexTest && !m_chain.Contains(*pindexTest); pindexTest = pindexTest->pprev) {
3146 [ - - - + ]: 339778 : assert(pindexTest->HaveNumChainTxs() || pindexTest->nHeight == 0);
3147 : :
3148 : : // Pruned nodes may have entries in setBlockIndexCandidates for
3149 : : // which block files have been deleted. Remove those as candidates
3150 : : // for the most work chain if we come across them; we can't switch
3151 : : // to a chain unless we have all the non-active-chain parent blocks.
3152 : 339778 : bool fFailedChain = pindexTest->nStatus & BLOCK_FAILED_VALID;
3153 : 339778 : bool fMissingData = !(pindexTest->nStatus & BLOCK_HAVE_DATA);
3154 [ + + ]: 339778 : if (fFailedChain || fMissingData) {
3155 : : // Candidate chain is not usable (either invalid or missing data)
3156 [ + - + - : 433 : if (fFailedChain && (m_chainman.m_best_invalid == nullptr || pindexNew->nChainWork > m_chainman.m_best_invalid->nChainWork)) {
- + ]
3157 : 0 : m_chainman.m_best_invalid = pindexNew;
3158 : : }
3159 : : // Remove the entire chain from the set.
3160 [ - + ]: 433 : for (CBlockIndex *pindexFailed = pindexNew; pindexFailed != pindexTest; pindexFailed = pindexFailed->pprev) {
3161 [ # # ]: 0 : if (fMissingData && !fFailedChain) {
3162 : : // If we're missing data and not a descendant of an invalid block,
3163 : : // then add back to m_blocks_unlinked, so that if the block arrives in the future
3164 : : // we can try adding to setBlockIndexCandidates again.
3165 : 0 : m_blockman.m_blocks_unlinked.insert(
3166 : 0 : std::make_pair(pindexFailed->pprev, pindexFailed));
3167 : : }
3168 : 0 : setBlockIndexCandidates.erase(pindexFailed);
3169 : : }
3170 : 433 : setBlockIndexCandidates.erase(pindexTest);
3171 : 433 : fInvalidAncestor = true;
3172 : 433 : break;
3173 : : }
3174 : : }
3175 [ + + ]: 356568 : if (!fInvalidAncestor)
3176 : : return pindexNew;
3177 : : } while(true);
3178 : : }
3179 : :
3180 : : /** Delete all entries in setBlockIndexCandidates that are worse than the current tip. */
3181 : 328503 : void Chainstate::PruneBlockIndexCandidates() {
3182 : : // Note that we can't delete the current block itself, as we may need to return to it later in case a
3183 : : // reorganization to a better block fails.
3184 : 328503 : std::set<CBlockIndex*, CBlockIndexWorkComparator>::iterator it = setBlockIndexCandidates.begin();
3185 [ + - - + : 1305760 : while (it != setBlockIndexCandidates.end() && setBlockIndexCandidates.value_comp()(*it, m_chain.Tip())) {
+ + ]
3186 : 324377 : setBlockIndexCandidates.erase(it++);
3187 : : }
3188 : : // Either the current tip or a successor of it we're working towards is left in setBlockIndexCandidates.
3189 [ - + ]: 328503 : assert(!setBlockIndexCandidates.empty());
3190 : 328503 : }
3191 : :
3192 : : /**
3193 : : * Try to make some progress towards making index_most_work the active block.
3194 : : * pblock is either nullptr or a pointer to a CBlock corresponding to index_most_work.
3195 : : *
3196 : : * @returns true unless a system error occurred
3197 : : */
3198 : 335532 : bool Chainstate::ActivateBestChainStep(BlockValidationState& state, CBlockIndex& index_most_work, const std::shared_ptr<const CBlock>& pblock, bool& fInvalidFound, std::vector<ConnectedBlock>& connected_blocks)
3199 : : {
3200 : 335532 : AssertLockHeld(cs_main);
3201 : 335532 : if (m_mempool) AssertLockHeld(m_mempool->cs);
3202 : :
3203 [ - + ]: 335532 : const CBlockIndex* pindexOldTip = m_chain.Tip();
3204 : 335532 : const CBlockIndex* pindexFork = m_chain.FindFork(index_most_work);
3205 : :
3206 : : // Disconnect active blocks which are no longer in the best chain.
3207 : 335532 : bool fBlocksDisconnected = false;
3208 : 335532 : DisconnectedBlockTransactions disconnectpool{MAX_DISCONNECTED_TX_POOL_BYTES};
3209 [ - + + - : 1003385 : while (m_chain.Tip() && m_chain.Tip() != pindexFork) {
+ - ]
3210 [ # # # # ]: 0 : if (!DisconnectTip(state, &disconnectpool)) {
3211 : : // This is likely a fatal error, but keep the mempool consistent,
3212 : : // just in case. Only remove from the mempool in this case.
3213 [ # # ]: 0 : MaybeUpdateMempoolForReorg(disconnectpool, false);
3214 : :
3215 : : // If we're unable to disconnect a block during normal operation,
3216 : : // then that is a failure of our local system -- we should abort
3217 : : // rather than stay on a less work chain.
3218 [ # # # # ]: 0 : FatalError(m_chainman.GetNotifications(), state, _("Failed to disconnect block."));
3219 : 0 : return false;
3220 : : }
3221 : : fBlocksDisconnected = true;
3222 : : }
3223 : :
3224 : : // Build list of new blocks to connect (in descending height order).
3225 : 335532 : std::vector<CBlockIndex*> vpindexToConnect;
3226 : 335532 : bool fContinue = true;
3227 [ + + ]: 335532 : int nHeight = pindexFork ? pindexFork->nHeight : -1;
3228 [ + + + - ]: 661912 : while (fContinue && nHeight != index_most_work.nHeight) {
3229 : : // Don't iterate the entire list of potential improvements toward the best tip, as we likely only need
3230 : : // a few blocks along the way.
3231 [ - + ]: 335532 : int nTargetHeight = std::min(nHeight + 32, index_most_work.nHeight);
3232 [ - + ]: 335532 : vpindexToConnect.clear();
3233 [ + - ]: 335532 : vpindexToConnect.reserve(nTargetHeight - nHeight);
3234 [ + - ]: 335532 : CBlockIndex* pindexIter = index_most_work.GetAncestor(nTargetHeight);
3235 [ + + + + ]: 671081 : while (pindexIter && pindexIter->nHeight != nHeight) {
3236 [ + - ]: 335549 : vpindexToConnect.push_back(pindexIter);
3237 : 335549 : pindexIter = pindexIter->pprev;
3238 : : }
3239 : 335532 : nHeight = nTargetHeight;
3240 : :
3241 : : // Connect new blocks.
3242 [ + - ]: 335532 : for (CBlockIndex* pindexConnect : vpindexToConnect | std::views::reverse) {
3243 [ + + + - : 680199 : if (!ConnectTip(state, pindexConnect, pindexConnect == &index_most_work ? pblock : std::shared_ptr<const CBlock>(), connected_blocks, disconnectpool)) {
+ + + + ]
3244 [ + - ]: 9152 : if (state.IsInvalid()) {
3245 : : // The block violates a consensus rule.
3246 [ + - ]: 9152 : if (state.GetResult() != BlockValidationResult::BLOCK_MUTATED) {
3247 [ + - ]: 9152 : InvalidChainFound(vpindexToConnect.front());
3248 : : }
3249 : 9152 : state = BlockValidationState();
3250 : 9152 : fInvalidFound = true;
3251 : 9152 : fContinue = false;
3252 : 9152 : break;
3253 : : } else {
3254 : : // A system error occurred (disk space, database error, ...).
3255 : : // Make the mempool consistent with the current tip, just in case
3256 : : // any observers try to use it before shutdown.
3257 [ # # ]: 0 : MaybeUpdateMempoolForReorg(disconnectpool, false);
3258 : : return false;
3259 : : }
3260 : : } else {
3261 [ + - ]: 326380 : PruneBlockIndexCandidates();
3262 [ + + - + : 649549 : if (!pindexOldTip || m_chain.Tip()->nChainWork > pindexOldTip->nChainWork) {
+ - - + ]
3263 : : // We're in a better position than we were. Return temporarily to release the lock.
3264 : : fContinue = false;
3265 : : break;
3266 : : }
3267 : : }
3268 : : }
3269 : : }
3270 : :
3271 [ - + ]: 335532 : if (fBlocksDisconnected) {
3272 : : // If any blocks were disconnected, disconnectpool may be non empty. Add
3273 : : // any disconnected transactions back to the mempool.
3274 [ # # ]: 0 : MaybeUpdateMempoolForReorg(disconnectpool, true);
3275 : : }
3276 [ + - - + : 335532 : if (m_mempool) m_mempool->check(this->CoinsTip(), this->m_chain.Height() + 1);
+ - + - ]
3277 : :
3278 [ + - ]: 335532 : CheckForkWarningConditions();
3279 : :
3280 : : return true;
3281 : 335532 : }
3282 : :
3283 : 786498 : static SynchronizationState GetSynchronizationState(bool init, bool blockfiles_indexed)
3284 : : {
3285 [ + + ]: 786498 : if (!init) return SynchronizationState::POST_INIT;
3286 [ - + ]: 265548 : if (!blockfiles_indexed) return SynchronizationState::INIT_REINDEX;
3287 : : return SynchronizationState::INIT_DOWNLOAD;
3288 : : }
3289 : :
3290 : 326380 : void ChainstateManager::UpdateIBDStatus()
3291 : : {
3292 : 326380 : AssertLockHeld(cs_main);
3293 [ + + ]: 326380 : if (!m_cached_is_ibd.load(std::memory_order_relaxed)) return;
3294 [ + - ]: 77748 : if (m_blockman.LoadingBlocks()) return;
3295 [ + + ]: 77748 : if (!CurrentChainstate().m_chain.IsTipRecent(MinimumChainWork(), m_options.max_tip_age)) return;
3296 : 2240 : LogInfo("Leaving InitialBlockDownload (latching to false)");
3297 : 2240 : m_cached_is_ibd.store(false, std::memory_order_relaxed);
3298 : : }
3299 : :
3300 : 592449 : bool ChainstateManager::NotifyHeaderTip()
3301 : : {
3302 : 592449 : bool fNotify = false;
3303 : 592449 : bool fInitialBlockDownload = false;
3304 : 592449 : CBlockIndex* pindexHeader = nullptr;
3305 : 592449 : {
3306 : 592449 : LOCK(GetMutex());
3307 : 592449 : pindexHeader = m_best_header;
3308 : :
3309 [ + + ]: 592449 : if (pindexHeader != m_last_notified_header) {
3310 : 460118 : fNotify = true;
3311 : 460118 : fInitialBlockDownload = IsInitialBlockDownload();
3312 : 460118 : m_last_notified_header = pindexHeader;
3313 : : }
3314 : 592449 : }
3315 : : // Send block tip changed notifications without the lock held
3316 [ + + ]: 592449 : if (fNotify) {
3317 : 460118 : GetNotifications().headerTip(GetSynchronizationState(fInitialBlockDownload, m_blockman.m_blockfiles_indexed), pindexHeader->nHeight, pindexHeader->nTime, false);
3318 : : }
3319 : 592449 : return fNotify;
3320 : : }
3321 : :
3322 : 351297 : static void LimitValidationInterfaceQueue(ValidationSignals& signals) LOCKS_EXCLUDED(cs_main) {
3323 : 351297 : AssertLockNotHeld(cs_main);
3324 : :
3325 [ - + ]: 351297 : if (signals.CallbacksPending() > 10) {
3326 : 0 : signals.SyncWithValidationInterfaceQueue();
3327 : : }
3328 : 351297 : }
3329 : :
3330 : 342775 : bool Chainstate::ActivateBestChain(BlockValidationState& state, std::shared_ptr<const CBlock> pblock)
3331 : : {
3332 : 342775 : AssertLockNotHeld(m_chainstate_mutex);
3333 : :
3334 : : // Note that while we're often called here from ProcessNewBlock, this is
3335 : : // far from a guarantee. Things in the P2P/RPC will often end up calling
3336 : : // us in the middle of ProcessNewBlock - do not assume pblock is set
3337 : : // sanely for performance or correctness!
3338 : 342775 : AssertLockNotHeld(::cs_main);
3339 : :
3340 : : // ABC maintains a fair degree of expensive-to-calculate internal state
3341 : : // because this function periodically releases cs_main so that it does not lock up other threads for too long
3342 : : // during large connects - and to allow for e.g. the callback queue to drain
3343 : : // we use m_chainstate_mutex to enforce mutual exclusion so that only one caller may execute this function at a time
3344 : 342775 : LOCK(m_chainstate_mutex);
3345 : :
3346 : : // Belt-and-suspenders check that we aren't attempting to advance the
3347 : : // chainstate past the target block.
3348 [ + - - + : 685550 : if (WITH_LOCK(::cs_main, return m_target_utxohash)) {
+ - ]
3349 [ # # # # ]: 0 : LogError("%s", STR_INTERNAL_BUG("m_target_utxohash is set - this chainstate should not be in operation."));
3350 [ - - + - ]: 342775 : return Assume(false);
3351 : : }
3352 : :
3353 : : CBlockIndex *pindexMostWork = nullptr;
3354 : : CBlockIndex *pindexNewTip = nullptr;
3355 : : bool exited_ibd{false};
3356 : 351936 : do {
3357 : : // Block until the validation queue drains. This should largely
3358 : : // never happen in normal operation, however may happen during
3359 : : // reindex, causing memory blowup if we run too far ahead.
3360 : : // Note that if a validationinterface callback ends up calling
3361 : : // ActivateBestChain this may lead to a deadlock! We should
3362 : : // probably have a DEBUG_LOCKORDER test for this in the future.
3363 [ + + + - ]: 351936 : if (m_chainman.m_options.signals) LimitValidationInterfaceQueue(*m_chainman.m_options.signals);
3364 : :
3365 : 351936 : {
3366 [ + - ]: 351936 : LOCK(cs_main);
3367 : 351936 : {
3368 : : // Lock transaction pool for at least as long as it takes for connected_blocks to be consumed
3369 [ + - + - ]: 703872 : LOCK(MempoolMutex());
3370 : 351936 : const bool was_in_ibd = m_chainman.IsInitialBlockDownload();
3371 [ - + ]: 351936 : CBlockIndex* starting_tip = m_chain.Tip();
3372 : 351936 : bool blocks_connected = false;
3373 : 351936 : do {
3374 : : // We absolutely may not unlock cs_main until we've made forward progress
3375 : : // (with the exception of shutdown due to hardware issues, low disk space, etc).
3376 : 351936 : std::vector<ConnectedBlock> connected_blocks; // Destructed before cs_main is unlocked
3377 : :
3378 [ + + ]: 351936 : if (pindexMostWork == nullptr) {
3379 [ + - ]: 351927 : pindexMostWork = FindMostWorkChain();
3380 : : }
3381 : :
3382 : : // Whether we have anything to do at all.
3383 [ + - - + : 703872 : if (pindexMostWork == nullptr || pindexMostWork == m_chain.Tip()) {
+ + ]
3384 : : break;
3385 : : }
3386 : :
3387 : 335532 : bool fInvalidFound = false;
3388 : 335532 : std::shared_ptr<const CBlock> nullBlockPtr;
3389 : : // BlockConnected signals must be sent for the original role;
3390 : : // in case snapshot validation is completed during ActivateBestChainStep, the
3391 : : // result of GetRole() changes from BACKGROUND to NORMAL.
3392 [ + - ]: 335532 : const ChainstateRole chainstate_role{this->GetRole()};
3393 [ + + + - : 335558 : if (!ActivateBestChainStep(state, *pindexMostWork, pblock && pblock->GetHash() == pindexMostWork->GetBlockHash() ? pblock : nullBlockPtr, fInvalidFound, connected_blocks)) {
+ + + - -
+ ]
3394 : : // A system error occurred
3395 [ # # ]: 0 : return false;
3396 : : }
3397 : 335532 : blocks_connected = true;
3398 : :
3399 [ + + ]: 335532 : if (fInvalidFound) {
3400 : : // Wipe cache, we may need another branch now.
3401 : 9152 : pindexMostWork = nullptr;
3402 : : }
3403 [ - + ]: 335532 : pindexNewTip = m_chain.Tip();
3404 : :
3405 [ + + ]: 661912 : for (auto& [index, block] : std::move(connected_blocks)) {
3406 [ + + ]: 326380 : if (m_chainman.m_options.signals) {
3407 [ - + - + : 651482 : m_chainman.m_options.signals->BlockConnected(chainstate_role, std::move(Assert(block)), Assert(index));
+ - ]
3408 : : }
3409 : : }
3410 : :
3411 : : // Break this do-while to ensure we don't advance past the target block.
3412 [ + - + - ]: 335532 : if (ReachedTarget()) {
3413 : : break;
3414 : : }
3415 [ - + + - : 687468 : } while (!m_chain.Tip() || (starting_tip && CBlockIndexWorkComparator()(m_chain.Tip(), starting_tip)));
+ + + - -
+ - + ]
3416 [ + + ]: 351936 : if (!blocks_connected) return true;
3417 : :
3418 [ + + + - ]: 335532 : const CBlockIndex* pindexFork = starting_tip ? m_chain.FindFork(*starting_tip) : nullptr;
3419 : 335532 : bool still_in_ibd = m_chainman.IsInitialBlockDownload();
3420 : :
3421 [ + + ]: 335532 : if (was_in_ibd && !still_in_ibd) {
3422 : : // Active chainstate has exited IBD.
3423 : 2240 : exited_ibd = true;
3424 : : }
3425 : :
3426 : : // Notify external listeners about the new tip.
3427 : : // Enqueue while holding cs_main to ensure that UpdatedBlockTip is called in the order in which blocks are connected
3428 [ + - + - : 335532 : if (this == &m_chainman.ActiveChainstate() && pindexFork != pindexNewTip) {
+ + ]
3429 : : // Notify ValidationInterface subscribers
3430 [ + + ]: 326380 : if (m_chainman.m_options.signals) {
3431 [ + - ]: 325741 : m_chainman.m_options.signals->UpdatedBlockTip(pindexNewTip, pindexFork, still_in_ibd);
3432 : : }
3433 : :
3434 [ + - + - : 326380 : if (kernel::IsInterrupted(m_chainman.GetNotifications().blockTip(
+ - ]
3435 [ + - ]: 326380 : /*state=*/GetSynchronizationState(still_in_ibd, m_chainman.m_blockman.m_blockfiles_indexed),
3436 : : /*index=*/*pindexNewTip,
3437 : : /*verification_progress=*/m_chainman.GuessVerificationProgress(pindexNewTip))))
3438 : : {
3439 : : // Just breaking and returning success for now. This could
3440 : : // be changed to bubble up the kernel::Interrupted value to
3441 : : // the caller so the caller could distinguish between
3442 : : // completed and interrupted operations.
3443 : : break;
3444 : : }
3445 : : }
3446 [ + - - - ]: 16404 : } // release MempoolMutex
3447 : : // Notify external listeners about the new tip, even if pindexFork == pindexNewTip.
3448 [ + + + - : 335532 : if (m_chainman.m_options.signals && this == &m_chainman.ActiveChainstate()) {
+ - ]
3449 [ - + + - ]: 334893 : m_chainman.m_options.signals->ActiveTipChange(*Assert(pindexNewTip), m_chainman.IsInitialBlockDownload());
3450 : : }
3451 : 16404 : } // release cs_main
3452 : : // When we reach this point, we switched to a new tip (stored in pindexNewTip).
3453 : :
3454 : 335532 : bool reached_target;
3455 : 335532 : {
3456 [ + - ]: 335532 : LOCK(m_chainman.GetMutex());
3457 [ + + ]: 335532 : if (exited_ibd) {
3458 : : // If a background chainstate is in use, we may need to rebalance our
3459 : : // allocation of caches once a chainstate exits initial block download.
3460 [ + - ]: 2249 : m_chainman.MaybeRebalanceCaches();
3461 : : }
3462 : :
3463 : : // Write changes periodically to disk, after relay.
3464 [ + - - + ]: 335532 : if (!FlushStateToDisk(state, FlushStateMode::PERIODIC)) {
3465 [ # # ]: 0 : return false;
3466 : : }
3467 : :
3468 [ + - + - ]: 335532 : reached_target = ReachedTarget();
3469 : 0 : }
3470 : :
3471 [ - + ]: 335532 : if (reached_target) {
3472 : : // Chainstate has reached the target block, so exit.
3473 : : //
3474 : : // Restart indexes so indexes can resync and index new blocks after
3475 : : // the target block.
3476 : : //
3477 : : // This cannot be done while holding cs_main (within
3478 : : // MaybeValidateSnapshot) or a cs_main deadlock will occur.
3479 [ # # ]: 0 : if (m_chainman.snapshot_download_completed) {
3480 [ # # ]: 0 : m_chainman.snapshot_download_completed();
3481 : : }
3482 : : break;
3483 : : }
3484 : :
3485 : : // We check interrupt only after giving ActivateBestChainStep a chance to run once so that we
3486 : : // never interrupt before connecting the genesis block during LoadChainTip(). Previously this
3487 : : // caused an assert() failure during interrupt in such cases as the UTXO DB flushing checks
3488 : : // that the best block hash is non-null.
3489 [ + - + - ]: 335532 : if (m_chainman.m_interrupt) break;
3490 [ + + ]: 335532 : } while (pindexNewTip != pindexMostWork);
3491 : :
3492 [ + - ]: 326371 : m_chainman.CheckBlockIndex();
3493 : :
3494 : : return true;
3495 : 342775 : }
3496 : :
3497 : 2 : bool Chainstate::PreciousBlock(BlockValidationState& state, CBlockIndex* pindex)
3498 : : {
3499 : 2 : AssertLockNotHeld(m_chainstate_mutex);
3500 : 2 : AssertLockNotHeld(::cs_main);
3501 : 2 : {
3502 : 2 : LOCK(cs_main);
3503 [ - + + - : 4 : if (pindex->nChainWork < m_chain.Tip()->nChainWork) {
- + ]
3504 : : // Nothing to do, this block is not at the tip.
3505 [ # # ]: 0 : return true;
3506 : : }
3507 [ - + + - : 4 : if (m_chain.Tip()->nChainWork > m_chainman.nLastPreciousChainwork) {
+ + ]
3508 : : // The chain has been extended since the last call, reset the counter.
3509 : 1 : m_chainman.nBlockReverseSequenceId = -1;
3510 : : }
3511 [ - + ]: 2 : m_chainman.nLastPreciousChainwork = m_chain.Tip()->nChainWork;
3512 [ + - ]: 2 : setBlockIndexCandidates.erase(pindex);
3513 : 2 : pindex->nSequenceId = m_chainman.nBlockReverseSequenceId;
3514 [ + - ]: 2 : if (m_chainman.nBlockReverseSequenceId > std::numeric_limits<int32_t>::min()) {
3515 : : // We can't keep reducing the counter if somebody really wants to
3516 : : // call preciousblock 2**31-1 times on the same set of tips...
3517 : 2 : m_chainman.nBlockReverseSequenceId--;
3518 : : }
3519 [ + - + - : 4 : if (pindex->IsValid(BLOCK_VALID_TRANSACTIONS) && pindex->HaveNumChainTxs()) {
+ - + - ]
3520 [ + - ]: 2 : setBlockIndexCandidates.insert(pindex);
3521 [ + - ]: 2 : PruneBlockIndexCandidates();
3522 : : }
3523 : 0 : }
3524 : :
3525 [ + - - + ]: 2 : return ActivateBestChain(state, std::shared_ptr<const CBlock>());
3526 : : }
3527 : :
3528 : 2 : bool Chainstate::InvalidateBlock(BlockValidationState& state, CBlockIndex* const pindex)
3529 : : {
3530 : 2 : AssertLockNotHeld(m_chainstate_mutex);
3531 : 2 : AssertLockNotHeld(::cs_main);
3532 : :
3533 : : // Genesis block can't be invalidated
3534 [ - + ]: 2 : assert(pindex);
3535 [ - + ]: 2 : if (pindex->nHeight == 0) return false;
3536 : :
3537 : : // We do not allow ActivateBestChain() to run while InvalidateBlock() is
3538 : : // running, as that could cause the tip to change while we disconnect
3539 : : // blocks.
3540 : 0 : LOCK(m_chainstate_mutex);
3541 : :
3542 : : // We'll be acquiring and releasing cs_main below, to allow the validation
3543 : : // callbacks to run. However, we should keep the block index in a
3544 : : // consistent state as we disconnect blocks -- in particular we need to
3545 : : // add equal-work blocks to setBlockIndexCandidates as we disconnect.
3546 : : // To avoid walking the block index repeatedly in search of candidates,
3547 : : // build a map once so that we can look up candidate blocks by chain
3548 : : // work as we go.
3549 [ # # ]: 0 : std::multimap<const arith_uint256, CBlockIndex*> highpow_outofchain_headers;
3550 : :
3551 : 0 : {
3552 [ # # ]: 0 : LOCK(cs_main);
3553 [ # # # # : 0 : for (auto& entry : m_blockman.m_block_index) {
# # ]
3554 : 0 : CBlockIndex& candidate = entry.second;
3555 : : // We don't need to put anything in our active chain into the
3556 : : // multimap, because those candidates will be found and considered
3557 : : // as we disconnect.
3558 : : // Instead, consider only non-active-chain blocks that score
3559 : : // at least as good with CBlockIndexWorkComparator as the new tip.
3560 [ # # ]: 0 : if (!m_chain.Contains(candidate) &&
3561 [ # # # # ]: 0 : !CBlockIndexWorkComparator()(&candidate, pindex->pprev) &&
3562 [ # # ]: 0 : !(candidate.nStatus & BLOCK_FAILED_VALID)) {
3563 [ # # ]: 0 : highpow_outofchain_headers.insert({candidate.nChainWork, &candidate});
3564 : : }
3565 : : }
3566 : 0 : }
3567 : :
3568 : 0 : CBlockIndex* to_mark_failed = pindex;
3569 : 0 : bool pindex_was_in_chain = false;
3570 : 0 : int disconnected = 0;
3571 : :
3572 : : // Disconnect (descendants of) pindex, and mark them invalid.
3573 : 0 : while (true) {
3574 [ # # # # ]: 0 : if (m_chainman.m_interrupt) break;
3575 : :
3576 : : // Make sure the queue of validation callbacks doesn't grow unboundedly.
3577 [ # # # # ]: 0 : if (m_chainman.m_options.signals) LimitValidationInterfaceQueue(*m_chainman.m_options.signals);
3578 : :
3579 [ # # ]: 0 : LOCK(cs_main);
3580 : : // Lock for as long as disconnectpool is in scope to make sure MaybeUpdateMempoolForReorg is
3581 : : // called after DisconnectTip without unlocking in between
3582 [ # # # # ]: 0 : LOCK(MempoolMutex());
3583 [ # # ]: 0 : if (!m_chain.Contains(*pindex)) break;
3584 : 0 : pindex_was_in_chain = true;
3585 [ # # ]: 0 : CBlockIndex* const disconnected_tip{m_chain.Tip()};
3586 : :
3587 : : // ActivateBestChain considers blocks already in m_chain
3588 : : // unconditionally valid already, so force disconnect away from it.
3589 [ # # ]: 0 : DisconnectedBlockTransactions disconnectpool{MAX_DISCONNECTED_TX_POOL_BYTES};
3590 [ # # ]: 0 : bool ret = DisconnectTip(state, &disconnectpool);
3591 : : // DisconnectTip will add transactions to disconnectpool.
3592 : : // Adjust the mempool to be consistent with the new tip, adding
3593 : : // transactions back to the mempool if disconnecting was successful,
3594 : : // and we're not doing a very deep invalidation (in which case
3595 : : // keeping the mempool up to date is probably futile anyway).
3596 [ # # # # : 0 : MaybeUpdateMempoolForReorg(disconnectpool, /* fAddToMempool = */ (++disconnected <= 10) && ret);
# # ]
3597 [ # # ]: 0 : if (!ret) return false;
3598 [ # # ]: 0 : CBlockIndex* new_tip{m_chain.Tip()};
3599 [ # # ]: 0 : assert(disconnected_tip->pprev == new_tip);
3600 : :
3601 : : // We immediately mark the disconnected blocks as invalid.
3602 : : // This prevents a case where pruned nodes may fail to invalidateblock
3603 : : // and be left unable to start as they have no tip candidates (as there
3604 : : // are no blocks that meet the "have data and are not invalid per
3605 : : // nStatus" criteria for inclusion in setBlockIndexCandidates).
3606 : 0 : disconnected_tip->nStatus |= BLOCK_FAILED_VALID;
3607 [ # # ]: 0 : m_blockman.m_dirty_blockindex.insert(disconnected_tip);
3608 [ # # ]: 0 : setBlockIndexCandidates.erase(disconnected_tip);
3609 [ # # ]: 0 : setBlockIndexCandidates.insert(new_tip);
3610 : :
3611 : : // Mark out-of-chain descendants of the invalidated block as invalid
3612 : : // Add any equal or more work headers that are not invalidated to setBlockIndexCandidates
3613 : : // Recalculate m_best_header if it became invalid.
3614 [ # # ]: 0 : auto candidate_it = highpow_outofchain_headers.lower_bound(new_tip->nChainWork);
3615 : :
3616 [ # # ]: 0 : const bool best_header_needs_update{m_chainman.m_best_header->GetAncestor(disconnected_tip->nHeight) == disconnected_tip};
3617 [ # # ]: 0 : if (best_header_needs_update) {
3618 : : // new_tip is definitely still valid at this point, but there may be better ones
3619 : 0 : m_chainman.m_best_header = new_tip;
3620 : : }
3621 : :
3622 [ # # ]: 0 : while (candidate_it != highpow_outofchain_headers.end()) {
3623 [ # # ]: 0 : CBlockIndex* candidate{candidate_it->second};
3624 [ # # # # ]: 0 : if (candidate->GetAncestor(disconnected_tip->nHeight) == disconnected_tip) {
3625 : : // Children of failed blocks are marked as BLOCK_FAILED_VALID.
3626 : 0 : candidate->nStatus |= BLOCK_FAILED_VALID;
3627 [ # # ]: 0 : m_blockman.m_dirty_blockindex.insert(candidate);
3628 : : // If invalidated, the block is irrelevant for setBlockIndexCandidates
3629 : : // and for m_best_header and can be removed from the cache.
3630 : 0 : candidate_it = highpow_outofchain_headers.erase(candidate_it);
3631 : 0 : continue;
3632 : : }
3633 [ # # ]: 0 : if (!CBlockIndexWorkComparator()(candidate, new_tip) &&
3634 [ # # # # : 0 : candidate->IsValid(BLOCK_VALID_TRANSACTIONS) &&
# # # # ]
3635 [ # # ]: 0 : candidate->HaveNumChainTxs()) {
3636 [ # # ]: 0 : setBlockIndexCandidates.insert(candidate);
3637 : : // Do not remove candidate from the highpow_outofchain_headers cache, because it might be a descendant of the block being invalidated
3638 : : // which needs to be marked failed later.
3639 : : }
3640 [ # # # # ]: 0 : if (best_header_needs_update &&
3641 [ # # ]: 0 : m_chainman.m_best_header->nChainWork < candidate->nChainWork) {
3642 : 0 : m_chainman.m_best_header = candidate;
3643 : : }
3644 : 0 : ++candidate_it;
3645 : : }
3646 : :
3647 : : // Track the last disconnected block to call InvalidChainFound on it.
3648 : 0 : to_mark_failed = disconnected_tip;
3649 [ # # # # : 0 : }
# # # # #
# ]
3650 : :
3651 [ # # ]: 0 : m_chainman.CheckBlockIndex();
3652 : :
3653 : 0 : {
3654 [ # # ]: 0 : LOCK(cs_main);
3655 [ # # ]: 0 : if (m_chain.Contains(*to_mark_failed)) {
3656 : : // If the to-be-marked invalid block is in the active chain, something is interfering and we can't proceed.
3657 [ # # ]: 0 : return false;
3658 : : }
3659 : :
3660 : : // Mark pindex as invalid if it never was in the main chain
3661 [ # # # # ]: 0 : if (!pindex_was_in_chain && !(pindex->nStatus & BLOCK_FAILED_VALID)) {
3662 : 0 : pindex->nStatus |= BLOCK_FAILED_VALID;
3663 [ # # ]: 0 : m_blockman.m_dirty_blockindex.insert(pindex);
3664 [ # # ]: 0 : setBlockIndexCandidates.erase(pindex);
3665 : : }
3666 : :
3667 : : // If any new blocks somehow arrived while we were disconnecting
3668 : : // (above), then the pre-calculation of what should go into
3669 : : // setBlockIndexCandidates may have missed entries. This would
3670 : : // technically be an inconsistency in the block index, but if we clean
3671 : : // it up here, this should be an essentially unobservable error.
3672 : : // Loop back over all block index entries and add any missing entries
3673 : : // to setBlockIndexCandidates.
3674 [ # # # # ]: 0 : for (auto& [_, block_index] : m_blockman.m_block_index) {
3675 [ # # # # : 0 : if (block_index.IsValid(BLOCK_VALID_TRANSACTIONS) && block_index.HaveNumChainTxs() && !setBlockIndexCandidates.value_comp()(&block_index, m_chain.Tip())) {
# # # # #
# # # ]
3676 [ # # ]: 0 : setBlockIndexCandidates.insert(&block_index);
3677 : : }
3678 : : }
3679 : :
3680 [ # # ]: 0 : InvalidChainFound(to_mark_failed);
3681 : 0 : }
3682 : :
3683 : : // Only notify about a new block tip if the active chain was modified.
3684 [ # # ]: 0 : if (pindex_was_in_chain) {
3685 : : // Ignoring return value for now, this could be changed to bubble up
3686 : : // kernel::Interrupted value to the caller so the caller could
3687 : : // distinguish between completed and interrupted operations. It might
3688 : : // also make sense for the blockTip notification to have an enum
3689 : : // parameter indicating the source of the tip change so hooks can
3690 : : // distinguish user-initiated invalidateblock changes from other
3691 : : // changes.
3692 [ # # # # ]: 0 : (void)m_chainman.GetNotifications().blockTip(
3693 : 0 : /*state=*/GetSynchronizationState(m_chainman.IsInitialBlockDownload(), m_chainman.m_blockman.m_blockfiles_indexed),
3694 : 0 : /*index=*/*to_mark_failed->pprev,
3695 [ # # # # : 0 : /*verification_progress=*/WITH_LOCK(m_chainman.GetMutex(), return m_chainman.GuessVerificationProgress(to_mark_failed->pprev)));
# # ]
3696 : :
3697 : : // Fire ActiveTipChange now for the current chain tip to make sure clients are notified.
3698 : : // ActivateBestChain may call this as well, but not necessarily.
3699 [ # # ]: 0 : if (m_chainman.m_options.signals) {
3700 [ # # # # : 0 : m_chainman.m_options.signals->ActiveTipChange(*Assert(m_chain.Tip()), m_chainman.IsInitialBlockDownload());
# # ]
3701 : : }
3702 : : }
3703 : : return true;
3704 [ # # ]: 0 : }
3705 : :
3706 : 23900 : void Chainstate::SetBlockFailureFlags(CBlockIndex* invalid_block)
3707 : : {
3708 : 23900 : AssertLockHeld(cs_main);
3709 : :
3710 [ + + + + ]: 2455070 : for (auto& [_, block_index] : m_blockman.m_block_index) {
3711 [ + + + + ]: 2431170 : if (invalid_block != &block_index && block_index.GetAncestor(invalid_block->nHeight) == invalid_block) {
3712 : 9540 : block_index.nStatus |= BLOCK_FAILED_VALID;
3713 : 9540 : m_blockman.m_dirty_blockindex.insert(&block_index);
3714 : : }
3715 : : }
3716 : 23900 : }
3717 : :
3718 : 20 : void Chainstate::ResetBlockFailureFlags(CBlockIndex *pindex) {
3719 : 20 : AssertLockHeld(cs_main);
3720 : :
3721 : 20 : int nHeight = pindex->nHeight;
3722 : :
3723 : : // Remove the invalidity flag from this block and all its descendants and ancestors.
3724 [ + + - + ]: 1172 : for (auto& [_, block_index] : m_blockman.m_block_index) {
3725 [ - - - - : 1152 : if ((block_index.nStatus & BLOCK_FAILED_VALID) && (block_index.GetAncestor(nHeight) == pindex || pindex->GetAncestor(block_index.nHeight) == &block_index)) {
- + ]
3726 : 0 : block_index.nStatus &= ~BLOCK_FAILED_VALID;
3727 : 0 : m_blockman.m_dirty_blockindex.insert(&block_index);
3728 [ # # # # : 0 : if (block_index.IsValid(BLOCK_VALID_TRANSACTIONS) && block_index.HaveNumChainTxs() && setBlockIndexCandidates.value_comp()(m_chain.Tip(), &block_index)) {
# # # # #
# ]
3729 : 0 : setBlockIndexCandidates.insert(&block_index);
3730 : : }
3731 [ # # ]: 0 : if (&block_index == m_chainman.m_best_invalid) {
3732 : : // Reset invalid block marker if it was pointing to one of those.
3733 : 0 : m_chainman.m_best_invalid = nullptr;
3734 : : }
3735 : : }
3736 : : }
3737 : 20 : }
3738 : :
3739 : 345658 : void Chainstate::TryAddBlockIndexCandidate(CBlockIndex* pindex)
3740 : : {
3741 : 345658 : AssertLockHeld(cs_main);
3742 : :
3743 : : // Do not continue building a chainstate that is based on an invalid
3744 : : // snapshot. This is a belt-and-suspenders type of check because if an
3745 : : // invalid snapshot is loaded, the node will shut down to force a manual
3746 : : // intervention. But it is good to handle this case correctly regardless.
3747 [ + - ]: 345658 : if (m_assumeutxo == Assumeutxo::INVALID) {
3748 : : return;
3749 : : }
3750 : :
3751 : : // The block only is a candidate for the most-work-chain if it has the same
3752 : : // or more work than our current tip.
3753 [ - + + - : 684894 : if (m_chain.Tip() != nullptr && setBlockIndexCandidates.value_comp()(pindex, m_chain.Tip())) {
+ + ]
3754 : : return;
3755 : : }
3756 : :
3757 : 342515 : const CBlockIndex* target_block{TargetBlock()};
3758 [ + - ]: 342515 : if (!target_block) {
3759 : : // If no specific target block, add all entries that have more
3760 : : // work than the tip.
3761 : 342515 : setBlockIndexCandidates.insert(pindex);
3762 : : } else {
3763 : : // If there is a target block, only consider connecting blocks
3764 : : // towards the target block.
3765 [ # # ]: 0 : if (target_block->GetAncestor(pindex->nHeight) == pindex) {
3766 : 0 : setBlockIndexCandidates.insert(pindex);
3767 : : }
3768 : : }
3769 : : }
3770 : :
3771 : : /** Mark a block as having its data received and checked (up to BLOCK_VALID_TRANSACTIONS). */
3772 : 342917 : void ChainstateManager::ReceivedBlockTransactions(const CBlock& block, CBlockIndex* pindexNew, const FlatFilePos& pos)
3773 : : {
3774 : 342917 : AssertLockHeld(cs_main);
3775 [ - + ]: 342917 : pindexNew->nTx = block.vtx.size();
3776 : : // Typically m_chain_tx_count will be 0 at this point, but it can be nonzero if this
3777 : : // is a pruned block which is being downloaded again, or if this is an
3778 : : // assumeutxo snapshot block which has a hardcoded m_chain_tx_count value from the
3779 : : // snapshot metadata. If the pindex is not the snapshot block and the
3780 : : // m_chain_tx_count value is not zero, assert that value is actually correct.
3781 : 341734 : auto prev_tx_sum = [](CBlockIndex& block) { return block.nTx + (block.pprev ? block.pprev->m_chain_tx_count : 0); };
3782 [ - - + + : 344889 : if (!Assume(pindexNew->m_chain_tx_count == 0 || pindexNew->m_chain_tx_count == prev_tx_sum(*pindexNew) ||
+ + - + -
- - + ]
3783 : : std::ranges::any_of(m_chainstates, [&](const auto& cs) EXCLUSIVE_LOCKS_REQUIRED(cs_main) { return cs->SnapshotBase() == pindexNew; }))) {
3784 [ # # # # ]: 0 : LogWarning("Internal bug detected: block %d has unexpected m_chain_tx_count %i that should be %i (%s %s). Please report this issue here: %s\n",
3785 : : pindexNew->nHeight, pindexNew->m_chain_tx_count, prev_tx_sum(*pindexNew), CLIENT_NAME, FormatFullVersion(), CLIENT_BUGREPORT);
3786 : 0 : pindexNew->m_chain_tx_count = 0;
3787 : : }
3788 : 342917 : pindexNew->nFile = pos.nFile;
3789 : 342917 : pindexNew->nDataPos = pos.nPos;
3790 : 342917 : pindexNew->nUndoPos = 0;
3791 : 342917 : pindexNew->nStatus |= BLOCK_HAVE_DATA;
3792 [ + + ]: 342917 : if (DeploymentActiveAt(*pindexNew, *this, Consensus::DEPLOYMENT_SEGWIT)) {
3793 : 342916 : pindexNew->nStatus |= BLOCK_OPT_WITNESS;
3794 : : }
3795 : 342917 : pindexNew->RaiseValidity(BLOCK_VALID_TRANSACTIONS);
3796 : 342917 : m_blockman.m_dirty_blockindex.insert(pindexNew);
3797 : :
3798 [ + + + + ]: 342917 : if (pindexNew->pprev == nullptr || pindexNew->pprev->HaveNumChainTxs()) {
3799 : : // If pindexNew is the genesis block or all parents are BLOCK_VALID_TRANSACTIONS.
3800 : 340580 : std::deque<CBlockIndex*> queue;
3801 [ + - ]: 340580 : queue.push_back(pindexNew);
3802 : :
3803 : : // Recursively process any descendant blocks that now may be eligible to be connected.
3804 [ + + ]: 682584 : while (!queue.empty()) {
3805 : 342004 : CBlockIndex *pindex = queue.front();
3806 : 342004 : queue.pop_front();
3807 : : // Before setting m_chain_tx_count, assert that it is 0 or already set to
3808 : : // the correct value. This assert will fail after receiving the
3809 : : // assumeutxo snapshot block if assumeutxo snapshot metadata has an
3810 : : // incorrect hardcoded AssumeutxoData::m_chain_tx_count value.
3811 [ + + + + : 346951 : if (!Assume(pindex->m_chain_tx_count == 0 || pindex->m_chain_tx_count == prev_tx_sum(*pindex))) {
+ - - + ]
3812 [ # # # # : 0 : LogWarning("Internal bug detected: block %d has unexpected m_chain_tx_count %i that should be %i (%s %s). Please report this issue here: %s\n",
# # ]
3813 : : pindex->nHeight, pindex->m_chain_tx_count, prev_tx_sum(*pindex), CLIENT_NAME, FormatFullVersion(), CLIENT_BUGREPORT);
3814 : : }
3815 [ + + ]: 342004 : pindex->m_chain_tx_count = prev_tx_sum(*pindex);
3816 : 342004 : pindex->nSequenceId = nBlockSequenceId++;
3817 [ + + ]: 684008 : for (const auto& c : m_chainstates) {
3818 [ + - ]: 342004 : c->TryAddBlockIndexCandidate(pindex);
3819 : : }
3820 : 342004 : std::pair<std::multimap<CBlockIndex*, CBlockIndex*>::iterator, std::multimap<CBlockIndex*, CBlockIndex*>::iterator> range = m_blockman.m_blocks_unlinked.equal_range(pindex);
3821 [ + + ]: 343428 : while (range.first != range.second) {
3822 : 1424 : std::multimap<CBlockIndex*, CBlockIndex*>::iterator it = range.first;
3823 [ + - ]: 1424 : queue.push_back(it->second);
3824 : 1424 : range.first++;
3825 : 1424 : m_blockman.m_blocks_unlinked.erase(it);
3826 : : }
3827 : : }
3828 : 340580 : } else {
3829 [ + - + - ]: 2337 : if (pindexNew->pprev && pindexNew->pprev->IsValid(BLOCK_VALID_TREE)) {
3830 : 2337 : m_blockman.m_blocks_unlinked.insert(std::make_pair(pindexNew->pprev, pindexNew));
3831 : : }
3832 : : }
3833 : 342917 : }
3834 : :
3835 : 1665489 : static bool CheckBlockHeader(const CBlockHeader& block, BlockValidationState& state, const Consensus::Params& consensusParams, bool fCheckPOW = true)
3836 : : {
3837 : : // Check proof of work matches claimed amount
3838 [ + + + + ]: 1665489 : if (fCheckPOW && !CheckProofOfWork(block.GetHash(), block.nBits, consensusParams))
3839 [ + - + - ]: 24239 : return state.Invalid(BlockValidationResult::BLOCK_INVALID_HEADER, "high-hash", "proof of work failed");
3840 : :
3841 : : return true;
3842 : : }
3843 : :
3844 : 395708 : static bool CheckMerkleRoot(const CBlock& block, BlockValidationState& state)
3845 : : {
3846 [ + + ]: 395708 : if (block.m_checked_merkle_root) return true;
3847 : :
3848 : 387489 : bool mutated;
3849 : 387489 : uint256 merkle_root = BlockMerkleRoot(block, &mutated);
3850 [ + + ]: 387489 : if (block.hashMerkleRoot != merkle_root) {
3851 [ + - ]: 14889 : return state.Invalid(
3852 : : /*result=*/BlockValidationResult::BLOCK_MUTATED,
3853 [ + - ]: 29778 : /*reject_reason=*/"bad-txnmrklroot",
3854 : 29778 : /*debug_message=*/"hashMerkleRoot mismatch");
3855 : : }
3856 : :
3857 : : // Check for merkle tree malleability (CVE-2012-2459): repeating sequences
3858 : : // of transactions in a block without affecting the merkle root of a block,
3859 : : // while still invalidating it.
3860 [ + + ]: 372600 : if (mutated) {
3861 [ + - ]: 3521 : return state.Invalid(
3862 : : /*result=*/BlockValidationResult::BLOCK_MUTATED,
3863 [ + - ]: 7042 : /*reject_reason=*/"bad-txns-duplicate",
3864 : 7042 : /*debug_message=*/"duplicate transaction");
3865 : : }
3866 : :
3867 : 369079 : block.m_checked_merkle_root = true;
3868 : 369079 : return true;
3869 : : }
3870 : :
3871 : : /** CheckWitnessMalleation performs checks for block malleation with regard to
3872 : : * its witnesses.
3873 : : *
3874 : : * Note: If the witness commitment is expected (i.e. `expect_witness_commitment
3875 : : * = true`), then the block is required to have at least one transaction and the
3876 : : * first transaction needs to have at least one input. */
3877 : 702941 : static bool CheckWitnessMalleation(const CBlock& block, bool expect_witness_commitment, BlockValidationState& state)
3878 : : {
3879 [ + + ]: 702941 : if (expect_witness_commitment) {
3880 [ + + ]: 696292 : if (block.m_checked_witness_commitment) return true;
3881 : :
3882 : 364247 : int commitpos = GetWitnessCommitmentIndex(block);
3883 [ + + ]: 364247 : if (commitpos != NO_WITNESS_COMMITMENT) {
3884 [ + - - + ]: 363814 : assert(!block.vtx.empty() && !block.vtx[0]->vin.empty());
3885 [ - + ]: 363814 : const auto& witness_stack{block.vtx[0]->vin[0].scriptWitness.stack};
3886 : :
3887 [ - + + + : 363814 : if (witness_stack.size() != 1 || witness_stack[0].size() != 32) {
- + + + ]
3888 [ + - ]: 5 : return state.Invalid(
3889 : : /*result=*/BlockValidationResult::BLOCK_MUTATED,
3890 [ + - ]: 10 : /*reject_reason=*/"bad-witness-nonce-size",
3891 : 10 : /*debug_message=*/strprintf("%s : invalid witness reserved value size", __func__));
3892 : : }
3893 : :
3894 : : // The malleation check is ignored; as the transaction tree itself
3895 : : // already does not permit it, it is impossible to trigger in the
3896 : : // witness tree.
3897 : 363809 : uint256 hash_witness = BlockWitnessMerkleRoot(block);
3898 : :
3899 [ - + ]: 363809 : CHash256().Write(hash_witness).Write(witness_stack[0]).Finalize(hash_witness);
3900 [ - + + + ]: 727618 : if (memcmp(hash_witness.begin(), &block.vtx[0]->vout[commitpos].scriptPubKey[6], 32)) {
3901 [ + - ]: 3 : return state.Invalid(
3902 : : /*result=*/BlockValidationResult::BLOCK_MUTATED,
3903 [ + - ]: 6 : /*reject_reason=*/"bad-witness-merkle-match",
3904 : 6 : /*debug_message=*/strprintf("%s : witness merkle commitment mismatch", __func__));
3905 : : }
3906 : :
3907 : 363806 : block.m_checked_witness_commitment = true;
3908 : 363806 : return true;
3909 : : }
3910 : : }
3911 : :
3912 : : // No witness data is allowed in blocks that don't commit to witness data, as this would otherwise leave room for spam
3913 [ + + ]: 14152 : for (const auto& tx : block.vtx) {
3914 [ + + ]: 7082 : if (tx->HasWitness()) {
3915 [ + - ]: 12 : return state.Invalid(
3916 : : /*result=*/BlockValidationResult::BLOCK_MUTATED,
3917 [ + - ]: 24 : /*reject_reason=*/"unexpected-witness",
3918 : 24 : /*debug_message=*/strprintf("%s : unexpected witness data found", __func__));
3919 : : }
3920 : : }
3921 : :
3922 : : return true;
3923 : : }
3924 : :
3925 : 1779976 : bool CheckBlock(const CBlock& block, BlockValidationState& state, const Consensus::Params& consensusParams, bool fCheckPOW, bool fCheckMerkleRoot)
3926 : : {
3927 : : // These are checks that are independent of context.
3928 : :
3929 [ + + ]: 1779976 : if (block.fChecked)
3930 : : return true;
3931 : :
3932 : : // Check that the header is valid (particularly PoW). This is mostly
3933 : : // redundant with the call in AcceptBlockHeader.
3934 [ + + ]: 1115209 : if (!CheckBlockHeader(block, state, consensusParams, fCheckPOW))
3935 : : return false;
3936 : :
3937 : : // Signet only: check block solution
3938 [ - + - - : 1113891 : if (consensusParams.signet_blocks && fCheckPOW && !CheckSignetBlockSolution(block, consensusParams)) {
- - ]
3939 [ # # # # ]: 0 : return state.Invalid(BlockValidationResult::BLOCK_CONSENSUS, "bad-signet-blksig", "signet block signature validation failure");
3940 : : }
3941 : :
3942 : : // Check the merkle root.
3943 [ + + + + ]: 1113891 : if (fCheckMerkleRoot && !CheckMerkleRoot(block, state)) {
3944 : : return false;
3945 : : }
3946 : :
3947 : : // All potential-corruption validation must be done before we do any
3948 : : // transaction validation, as otherwise we may mark the header as invalid
3949 : : // because we receive the wrong transactions for it.
3950 : : // Note that witness malleability is checked in ContextualCheckBlock, so no
3951 : : // checks that use witness data may be performed here.
3952 : :
3953 : : // Size limits
3954 [ + + - + : 1095581 : if (block.vtx.empty() || block.vtx.size() * WITNESS_SCALE_FACTOR > MAX_BLOCK_WEIGHT || ::GetSerializeSize(TX_NO_WITNESS(block)) * WITNESS_SCALE_FACTOR > MAX_BLOCK_WEIGHT)
+ - + + ]
3955 [ + - + - ]: 335 : return state.Invalid(BlockValidationResult::BLOCK_CONSENSUS, "bad-blk-length", "size limits failed");
3956 : :
3957 : : // First transaction must be coinbase, the rest must not be
3958 [ + - + + ]: 1095246 : if (block.vtx.empty() || !block.vtx[0]->IsCoinBase())
3959 [ + - + - ]: 6031 : return state.Invalid(BlockValidationResult::BLOCK_CONSENSUS, "bad-cb-missing", "first tx is not coinbase");
3960 [ - + + + ]: 1435020 : for (unsigned int i = 1; i < block.vtx.size(); i++)
3961 [ + + ]: 345825 : if (block.vtx[i]->IsCoinBase())
3962 [ + - + - ]: 20 : return state.Invalid(BlockValidationResult::BLOCK_CONSENSUS, "bad-cb-multiple", "more than one coinbase");
3963 : :
3964 : : // Check transactions
3965 : : // Must check for duplicate inputs (see CVE-2018-17144)
3966 [ + + ]: 2341688 : for (const auto& tx : block.vtx) {
3967 [ + - ]: 1253707 : TxValidationState tx_state;
3968 [ + - + + ]: 1253707 : if (!CheckTransaction(*tx, tx_state)) {
3969 : : // CheckBlock() does context-free validation checks. The only
3970 : : // possible failures are consensus failures.
3971 [ - + ]: 1214 : assert(tx_state.GetResult() == TxValidationResult::TX_CONSENSUS);
3972 [ - + + - ]: 2428 : return state.Invalid(BlockValidationResult::BLOCK_CONSENSUS, tx_state.GetRejectReason(),
3973 [ + - + - ]: 2428 : strprintf("Transaction check failed (tx hash %s) %s", tx->GetHash().ToString(), tx_state.GetDebugMessage()));
3974 : : }
3975 : 1253707 : }
3976 : : // This underestimates the number of sigops, because unlike ConnectBlock it
3977 : : // does not count witness and p2sh sigops.
3978 : 1087981 : unsigned int nSigOps = 0;
3979 [ + + ]: 2327469 : for (const auto& tx : block.vtx)
3980 : : {
3981 : 1239488 : nSigOps += GetLegacySigOpCount(*tx);
3982 : : }
3983 [ + + ]: 1087981 : if (nSigOps * WITNESS_SCALE_FACTOR > MAX_BLOCK_SIGOPS_COST)
3984 [ + - + - ]: 16 : return state.Invalid(BlockValidationResult::BLOCK_CONSENSUS, "bad-blk-sigops", "out-of-bounds SigOpCount");
3985 : :
3986 [ + + ]: 1087965 : if (fCheckPOW && fCheckMerkleRoot)
3987 : 362421 : block.fChecked = true;
3988 : :
3989 : : return true;
3990 : : }
3991 : :
3992 : 483795 : void ChainstateManager::UpdateUncommittedBlockStructures(CBlock& block, const CBlockIndex* pindexPrev) const
3993 : : {
3994 : 483795 : int commitpos = GetWitnessCommitmentIndex(block);
3995 [ + + + - : 483795 : static const std::vector<unsigned char> nonce(32, 0x00);
+ - ]
3996 [ + + + - : 483795 : if (commitpos != NO_WITNESS_COMMITMENT && DeploymentActiveAfter(pindexPrev, *this, Consensus::DEPLOYMENT_SEGWIT) && !block.vtx[0]->HasWitness()) {
+ + ]
3997 : 371380 : CMutableTransaction tx(*block.vtx[0]);
3998 [ + - ]: 371380 : tx.vin[0].scriptWitness.stack.resize(1);
3999 [ + - ]: 371380 : tx.vin[0].scriptWitness.stack[0] = nonce;
4000 [ + - - + ]: 742760 : block.vtx[0] = MakeTransactionRef(std::move(tx));
4001 : 371380 : }
4002 : 483795 : }
4003 : :
4004 : 483753 : void ChainstateManager::GenerateCoinbaseCommitment(CBlock& block, const CBlockIndex* pindexPrev) const
4005 : : {
4006 : 483753 : int commitpos = GetWitnessCommitmentIndex(block);
4007 : 483753 : std::vector<unsigned char> ret(32, 0x00);
4008 [ + + ]: 483753 : if (commitpos == NO_WITNESS_COMMITMENT) {
4009 [ + - ]: 480497 : uint256 witnessroot = BlockWitnessMerkleRoot(block);
4010 [ + - + - : 480497 : CHash256().Write(witnessroot).Write(ret).Finalize(witnessroot);
- + + - +
- ]
4011 : 480497 : CTxOut out;
4012 : 480497 : out.nValue = 0;
4013 : 480497 : out.scriptPubKey.resize(MINIMUM_WITNESS_COMMITMENT);
4014 [ + - ]: 480497 : out.scriptPubKey[0] = OP_RETURN;
4015 [ + - ]: 480497 : out.scriptPubKey[1] = 0x24;
4016 [ + - ]: 480497 : out.scriptPubKey[2] = 0xaa;
4017 [ + - ]: 480497 : out.scriptPubKey[3] = 0x21;
4018 [ + - ]: 480497 : out.scriptPubKey[4] = 0xa9;
4019 [ + - ]: 480497 : out.scriptPubKey[5] = 0xed;
4020 [ + - + - ]: 960994 : memcpy(&out.scriptPubKey[6], witnessroot.begin(), 32);
4021 [ + - ]: 480497 : CMutableTransaction tx(*block.vtx[0]);
4022 [ + - ]: 480497 : tx.vout.push_back(out);
4023 [ + - - + ]: 960994 : block.vtx[0] = MakeTransactionRef(std::move(tx));
4024 : 480497 : }
4025 [ + - ]: 483753 : UpdateUncommittedBlockStructures(block, pindexPrev);
4026 : 483753 : }
4027 : :
4028 : 48440 : bool HasValidProofOfWork(std::span<const CBlockHeader> headers, const Consensus::Params& consensusParams)
4029 : : {
4030 : 48440 : return std::ranges::all_of(headers,
4031 : 219567 : [&](const auto& header) { return CheckProofOfWork(header.GetHash(), header.nBits, consensusParams); });
4032 : : }
4033 : :
4034 : 8575 : bool IsBlockMutated(const CBlock& block, bool check_witness_root)
4035 : : {
4036 [ + - ]: 8575 : BlockValidationState state;
4037 [ + - + + ]: 8575 : if (!CheckMerkleRoot(block, state)) {
4038 [ + - - + : 100 : LogDebug(BCLog::VALIDATION, "Block mutated: %s\n", state.ToString());
- - - - ]
4039 : 100 : return true;
4040 : : }
4041 : :
4042 [ + + + + ]: 8475 : if (block.vtx.empty() || !block.vtx[0]->IsCoinBase()) {
4043 : : // Consider the block mutated if any transaction is 64 bytes in size (see 3.1
4044 : : // in "Weaknesses in Bitcoin’s Merkle Root Construction":
4045 : : // https://lists.linuxfoundation.org/pipermail/bitcoin-dev/attachments/20190225/a27d8837/attachment-0001.pdf).
4046 : : //
4047 : : // Note: This is not a consensus change as this only applies to blocks that
4048 : : // don't have a coinbase transaction and would therefore already be invalid.
4049 : 637 : return std::any_of(block.vtx.begin(), block.vtx.end(),
4050 : 2310 : [](auto& tx) { return GetSerializeSize(TX_NO_WITNESS(tx)) == 64; });
4051 : : } else {
4052 : : // Theoretically it is still possible for a block with a 64 byte
4053 : : // coinbase transaction to be mutated but we neglect that possibility
4054 : : // here as it requires at least 224 bits of work.
4055 : : }
4056 : :
4057 [ + - + + ]: 7838 : if (!CheckWitnessMalleation(block, check_witness_root, state)) {
4058 [ + - - + : 20 : LogDebug(BCLog::VALIDATION, "Block mutated: %s\n", state.ToString());
- - - - ]
4059 : 20 : return true;
4060 : : }
4061 : :
4062 : : return false;
4063 : 8575 : }
4064 : :
4065 : 17013 : arith_uint256 CalculateClaimedHeadersWork(std::span<const CBlockHeader> headers)
4066 : : {
4067 : 17013 : arith_uint256 total_work{0};
4068 [ + + ]: 257627 : for (const CBlockHeader& header : headers) {
4069 : 240614 : total_work += GetBlockProof(header);
4070 : : }
4071 : 17013 : return total_work;
4072 : : }
4073 : :
4074 : : /** Context-dependent validity checks.
4075 : : * By "context", we mean only the previous block headers, but not the UTXO
4076 : : * set; UTXO-related validity checks are done in ConnectBlock().
4077 : : * NOTE: This function is not currently invoked by ConnectBlock(), so we
4078 : : * should consider upgrade issues if we change which consensus rules are
4079 : : * enforced in this function (eg by adding a new consensus rule). See comment
4080 : : * in ConnectBlock().
4081 : : * Note that -reindex-chainstate skips the validation that happens here!
4082 : : *
4083 : : * NOTE: failing to check the header's height against the last checkpoint's opened a DoS vector between
4084 : : * v0.12 and v0.15 (when no additional protection was in place) whereby an attacker could unboundedly
4085 : : * grow our in-memory block index. See https://bitcoincore.org/en/2024/07/03/disclose-header-spam.
4086 : : */
4087 : 878847 : static bool ContextualCheckBlockHeader(const CBlockHeader& block, BlockValidationState& state, const ChainstateManager& chainman, const CBlockIndex* pindexPrev) EXCLUSIVE_LOCKS_REQUIRED(::cs_main)
4088 : : {
4089 : 878847 : AssertLockHeld(::cs_main);
4090 [ - + ]: 878847 : assert(pindexPrev != nullptr);
4091 : 878847 : const int nHeight = pindexPrev->nHeight + 1;
4092 : :
4093 : : // Check proof of work
4094 : 878847 : const Consensus::Params& consensusParams = chainman.GetConsensus();
4095 [ + + ]: 878847 : if (block.nBits != GetNextWorkRequired(pindexPrev, &block, consensusParams))
4096 [ + - + - ]: 9087 : return state.Invalid(BlockValidationResult::BLOCK_INVALID_HEADER, "bad-diffbits", "incorrect proof of work");
4097 : :
4098 : : // Check timestamp against prev
4099 [ + + ]: 869760 : if (block.GetBlockTime() <= pindexPrev->GetMedianTimePast())
4100 [ + - + - ]: 5858 : return state.Invalid(BlockValidationResult::BLOCK_INVALID_HEADER, "time-too-old", "block's timestamp is too early");
4101 : :
4102 : : // Testnet4 and regtest only: Check timestamp against prev for difficulty-adjustment
4103 : : // blocks to prevent timewarp attacks (see https://github.com/bitcoin/bitcoin/pull/15482).
4104 [ - + ]: 863902 : if (consensusParams.enforce_BIP94) {
4105 : : // Check timestamp for the first block of each difficulty adjustment
4106 : : // interval, except the genesis block.
4107 [ # # ]: 0 : if (nHeight % consensusParams.DifficultyAdjustmentInterval() == 0) {
4108 [ # # ]: 0 : if (block.GetBlockTime() < pindexPrev->GetBlockTime() - MAX_TIMEWARP) {
4109 [ # # # # ]: 0 : return state.Invalid(BlockValidationResult::BLOCK_INVALID_HEADER, "time-timewarp-attack", "block's timestamp is too early on diff adjustment block");
4110 : : }
4111 : : }
4112 : : }
4113 : :
4114 : : // Check timestamp
4115 [ + + ]: 863902 : if (block.Time() > NodeClock::now() + std::chrono::seconds{MAX_FUTURE_BLOCK_TIME}) {
4116 [ + - + - ]: 19966 : return state.Invalid(BlockValidationResult::BLOCK_TIME_FUTURE, "time-too-new", "block timestamp too far in the future");
4117 : : }
4118 : :
4119 : : // Reject blocks with outdated version
4120 [ + + + + ]: 843936 : if ((block.nVersion < 2 && DeploymentActiveAfter(pindexPrev, chainman, Consensus::DEPLOYMENT_HEIGHTINCB)) ||
4121 [ + + + + : 1674579 : (block.nVersion < 3 && DeploymentActiveAfter(pindexPrev, chainman, Consensus::DEPLOYMENT_DERSIG)) ||
+ + ]
4122 [ + + ]: 3206 : (block.nVersion < 4 && DeploymentActiveAfter(pindexPrev, chainman, Consensus::DEPLOYMENT_CLTV))) {
4123 [ + - + - ]: 18781 : return state.Invalid(BlockValidationResult::BLOCK_INVALID_HEADER, strprintf("bad-version(0x%08x)", block.nVersion),
4124 : 37562 : strprintf("rejected nVersion=0x%08x block", block.nVersion));
4125 : : }
4126 : :
4127 : : return true;
4128 : : }
4129 : :
4130 : : /** NOTE: This function is not currently invoked by ConnectBlock(), so we
4131 : : * should consider upgrade issues if we change which consensus rules are
4132 : : * enforced in this function (eg by adding a new consensus rule). See comment
4133 : : * in ConnectBlock().
4134 : : * Note that -reindex-chainstate skips the validation that happens here!
4135 : : */
4136 : 695109 : static bool ContextualCheckBlock(const CBlock& block, BlockValidationState& state, const ChainstateManager& chainman, const CBlockIndex* pindexPrev)
4137 : : {
4138 [ + - ]: 695109 : const int nHeight = pindexPrev == nullptr ? 0 : pindexPrev->nHeight + 1;
4139 : :
4140 : : // Enforce BIP113 (Median Time Past).
4141 : 695109 : bool enforce_locktime_median_time_past{false};
4142 [ + - ]: 695109 : if (DeploymentActiveAfter(pindexPrev, chainman, Consensus::DEPLOYMENT_CSV)) {
4143 [ - + ]: 695109 : assert(pindexPrev != nullptr);
4144 : : enforce_locktime_median_time_past = true;
4145 : : }
4146 : :
4147 : 695109 : const int64_t nLockTimeCutoff{enforce_locktime_median_time_past ?
4148 : 695109 : pindexPrev->GetMedianTimePast() :
4149 : 0 : block.GetBlockTime()};
4150 : :
4151 : : // Check that all transactions are finalized
4152 [ + + ]: 1452864 : for (const auto& tx : block.vtx) {
4153 [ + + ]: 757761 : if (!IsFinalTx(*tx, nHeight, nLockTimeCutoff)) {
4154 [ + - + - ]: 6 : return state.Invalid(BlockValidationResult::BLOCK_CONSENSUS, "bad-txns-nonfinal", "non-final transaction");
4155 : : }
4156 : : }
4157 : :
4158 : : // Enforce rule that the coinbase starts with serialized block height
4159 [ + + ]: 695103 : if (DeploymentActiveAfter(pindexPrev, chainman, Consensus::DEPLOYMENT_HEIGHTINCB))
4160 : : {
4161 [ + - ]: 690993 : CScript expect = CScript() << nHeight;
4162 [ - + - + : 1381986 : if (block.vtx[0]->vin[0].scriptSig.size() < expect.size() ||
+ - + - ]
4163 [ + - - + ]: 1381986 : !std::equal(expect.begin(), expect.end(), block.vtx[0]->vin[0].scriptSig.begin())) {
4164 [ # # # # : 0 : return state.Invalid(BlockValidationResult::BLOCK_CONSENSUS, "bad-cb-height", "block height mismatch in coinbase");
# # ]
4165 : : }
4166 : 690993 : }
4167 : :
4168 : : // Validation for witness commitments.
4169 : : // * We compute the witness hash (which is the hash including witnesses) of all the block's transactions, except the
4170 : : // coinbase (where 0x0000....0000 is used instead).
4171 : : // * The coinbase scriptWitness is a stack of a single 32-byte vector, containing a witness reserved value (unconstrained).
4172 : : // * We build a merkle tree with all those witness hashes as leaves (similar to the hashMerkleRoot in the block header).
4173 : : // * There must be at least one output whose scriptPubKey is a single 36-byte push, the first 4 bytes of which are
4174 : : // {0xaa, 0x21, 0xa9, 0xed}, and the following 32 bytes are SHA256^2(witness root, witness reserved value). In case there are
4175 : : // multiple, the last one is used.
4176 [ + - ]: 695103 : if (!CheckWitnessMalleation(block, DeploymentActiveAfter(pindexPrev, chainman, Consensus::DEPLOYMENT_SEGWIT), state)) {
4177 : : return false;
4178 : : }
4179 : :
4180 : : // After the coinbase witness reserved value and commitment are verified,
4181 : : // we can check if the block weight passes (before we've checked the
4182 : : // coinbase witness, it would be possible for the weight to be too
4183 : : // large by filling up the coinbase witness, which doesn't change
4184 : : // the block hash, so we couldn't mark the block as permanently
4185 : : // failed).
4186 [ - + ]: 695103 : if (GetBlockWeight(block) > MAX_BLOCK_WEIGHT) {
4187 [ # # # # ]: 0 : return state.Invalid(BlockValidationResult::BLOCK_CONSENSUS, "bad-blk-weight", strprintf("%s : weight limit failed", __func__));
4188 : : }
4189 : :
4190 : : return true;
4191 : : }
4192 : :
4193 : 615509 : bool ChainstateManager::AcceptBlockHeader(const CBlockHeader& block, BlockValidationState& state, CBlockIndex** ppindex, bool min_pow_checked)
4194 : : {
4195 : 615509 : AssertLockHeld(cs_main);
4196 : :
4197 : : // Check for duplicate
4198 : 615509 : uint256 hash = block.GetHash();
4199 : 615509 : BlockMap::iterator miSelf{m_blockman.m_block_index.find(hash)};
4200 [ + - ]: 615509 : if (hash != GetConsensus().hashGenesisBlock) {
4201 [ + + ]: 615509 : if (miSelf != m_blockman.m_block_index.end()) {
4202 : : // Block header is already known.
4203 [ + - ]: 65229 : CBlockIndex* pindex = &(miSelf->second);
4204 [ + - ]: 65229 : if (ppindex)
4205 : 65229 : *ppindex = pindex;
4206 [ + + ]: 65229 : if (pindex->nStatus & BLOCK_FAILED_VALID) {
4207 [ + + + - ]: 18543 : LogDebug(BCLog::VALIDATION, "%s: block %s is marked invalid\n", __func__, hash.ToString());
4208 [ + - + - ]: 18543 : return state.Invalid(BlockValidationResult::BLOCK_CACHED_INVALID, "duplicate-invalid",
4209 [ + - ]: 37086 : strprintf("block %s was previously marked invalid", hash.ToString()));
4210 : : }
4211 : : return true;
4212 : : }
4213 : :
4214 [ + + ]: 550280 : if (!CheckBlockHeader(block, state, GetConsensus())) {
4215 [ + + + - : 22921 : LogDebug(BCLog::VALIDATION, "%s: Consensus::CheckBlockHeader: %s, %s\n", __func__, hash.ToString(), state.ToString());
+ - ]
4216 : 22921 : return false;
4217 : : }
4218 : :
4219 : : // Get prev block index
4220 : 527359 : CBlockIndex* pindexPrev = nullptr;
4221 : 527359 : BlockMap::iterator mi{m_blockman.m_block_index.find(block.hashPrevBlock)};
4222 [ + + ]: 527359 : if (mi == m_blockman.m_block_index.end()) {
4223 [ - + - - : 7178 : LogDebug(BCLog::VALIDATION, "header %s has prev block not found: %s\n", hash.ToString(), block.hashPrevBlock.ToString());
- - ]
4224 [ + - + - ]: 7178 : return state.Invalid(BlockValidationResult::BLOCK_MISSING_PREV, "prev-blk-not-found");
4225 : : }
4226 [ + + ]: 520181 : pindexPrev = &((*mi).second);
4227 [ + + ]: 520181 : if (pindexPrev->nStatus & BLOCK_FAILED_VALID) {
4228 [ - + - - : 3992 : LogDebug(BCLog::VALIDATION, "header %s has prev block invalid: %s\n", hash.ToString(), block.hashPrevBlock.ToString());
- - ]
4229 [ + - + - ]: 3992 : return state.Invalid(BlockValidationResult::BLOCK_INVALID_PREV, "bad-prevblk");
4230 : : }
4231 [ + + ]: 516189 : if (!ContextualCheckBlockHeader(block, state, *this, pindexPrev)) {
4232 [ + + + - : 53692 : LogDebug(BCLog::VALIDATION, "%s: Consensus::ContextualCheckBlockHeader: %s, %s\n", __func__, hash.ToString(), state.ToString());
+ - ]
4233 : 53692 : return false;
4234 : : }
4235 : : }
4236 [ + + ]: 462497 : if (!min_pow_checked) {
4237 [ - + - - ]: 881 : LogDebug(BCLog::VALIDATION, "%s: not adding new block header %s, missing anti-dos proof-of-work validation\n", __func__, hash.ToString());
4238 [ + - + - ]: 881 : return state.Invalid(BlockValidationResult::BLOCK_HEADER_LOW_WORK, "too-little-chainwork");
4239 : : }
4240 : 461616 : CBlockIndex* pindex{m_blockman.AddToBlockIndex(block, m_best_header)};
4241 : :
4242 [ + - ]: 461616 : if (ppindex)
4243 : 461616 : *ppindex = pindex;
4244 : :
4245 : : return true;
4246 : : }
4247 : :
4248 : : // Exposed wrapper for AcceptBlockHeader
4249 : 176710 : bool ChainstateManager::ProcessNewBlockHeaders(std::span<const CBlockHeader> headers, bool min_pow_checked, BlockValidationState& state, const CBlockIndex** ppindex)
4250 : : {
4251 : 176710 : AssertLockNotHeld(cs_main);
4252 : 176710 : {
4253 : 176710 : LOCK(cs_main);
4254 [ + + ]: 335934 : for (const CBlockHeader& header : headers) {
4255 : 176756 : CBlockIndex *pindex = nullptr; // Use a temp pindex instead of ppindex to avoid a const_cast
4256 [ + - ]: 176756 : bool accepted{AcceptBlockHeader(header, state, &pindex, min_pow_checked)};
4257 [ + - ]: 176756 : CheckBlockIndex();
4258 : :
4259 [ + + ]: 176756 : if (!accepted) {
4260 [ + - ]: 17532 : return false;
4261 : : }
4262 [ + + ]: 159224 : if (ppindex) {
4263 : 31723 : *ppindex = pindex;
4264 : : }
4265 : : }
4266 : 17532 : }
4267 [ + + ]: 159178 : if (NotifyHeaderTip()) {
4268 [ + + + + : 128810 : if (IsInitialBlockDownload() && ppindex && *ppindex) {
+ - ]
4269 : 1017 : const CBlockIndex& last_accepted{**ppindex};
4270 : 1017 : int64_t blocks_left{(NodeClock::now() - last_accepted.Time()) / GetConsensus().PowTargetSpacing()};
4271 [ + + ]: 1017 : blocks_left = std::max<int64_t>(0, blocks_left);
4272 : 1017 : const double progress{100.0 * last_accepted.nHeight / (last_accepted.nHeight + blocks_left)};
4273 : 1017 : LogInfo("Synchronizing blockheaders, height: %d (~%.2f%%)\n", last_accepted.nHeight, progress);
4274 : : }
4275 : : }
4276 : : return true;
4277 : : }
4278 : :
4279 : 5442 : void ChainstateManager::ReportHeadersPresync(int64_t height, int64_t timestamp)
4280 : : {
4281 : 5442 : AssertLockNotHeld(GetMutex());
4282 : 5442 : {
4283 : 5442 : LOCK(GetMutex());
4284 : : // Don't report headers presync progress if we already have a post-minchainwork header chain.
4285 : : // This means we lose reporting for potentially legitimate, but unlikely, deep reorgs, but
4286 : : // prevent attackers that spam low-work headers from filling our logs.
4287 [ + - + - : 5442 : if (m_best_header->nChainWork >= UintToArith256(GetConsensus().nMinimumChainWork)) return;
+ - ]
4288 : : // Rate limit headers presync updates to 4 per second, as these are not subject to DoS
4289 : : // protection.
4290 : 5442 : auto now = MockableSteadyClock::now();
4291 [ - + ]: 5442 : if (now < m_last_presync_update + std::chrono::milliseconds{250}) return;
4292 [ # # ]: 0 : m_last_presync_update = now;
4293 : 5442 : }
4294 : 0 : bool initial_download = IsInitialBlockDownload();
4295 : 0 : GetNotifications().headerTip(GetSynchronizationState(initial_download, m_blockman.m_blockfiles_indexed), height, timestamp, /*presync=*/true);
4296 [ # # ]: 0 : if (initial_download) {
4297 : 0 : int64_t blocks_left{(NodeClock::now() - NodeSeconds{std::chrono::seconds{timestamp}}) / GetConsensus().PowTargetSpacing()};
4298 [ # # ]: 0 : blocks_left = std::max<int64_t>(0, blocks_left);
4299 : 0 : const double progress{100.0 * height / (height + blocks_left)};
4300 : 0 : LogInfo("Pre-synchronizing blockheaders, height: %d (~%.2f%%)\n", height, progress);
4301 : : }
4302 : : }
4303 : :
4304 : : /** Store block on disk. If dbp is non-nullptr, the file is known to already reside on disk */
4305 : 438753 : bool ChainstateManager::AcceptBlock(const std::shared_ptr<const CBlock>& pblock, BlockValidationState& state, CBlockIndex** ppindex, bool fRequested, const FlatFilePos* dbp, bool* fNewBlock, bool min_pow_checked)
4306 : : {
4307 [ + + ]: 438753 : const CBlock& block = *pblock;
4308 : :
4309 [ + + ]: 438753 : if (fNewBlock) *fNewBlock = false;
4310 : 438753 : AssertLockHeld(cs_main);
4311 : :
4312 : 438753 : CBlockIndex *pindexDummy = nullptr;
4313 [ + + ]: 438753 : CBlockIndex *&pindex = ppindex ? *ppindex : pindexDummy;
4314 : :
4315 : 438753 : bool accepted_header{AcceptBlockHeader(block, state, &pindex, min_pow_checked)};
4316 : 438753 : CheckBlockIndex();
4317 : :
4318 [ + + ]: 438753 : if (!accepted_header)
4319 : : return false;
4320 : :
4321 : : // Check all requested blocks that we do not already have for validity and
4322 : : // save them to disk. Skip processing of unrequested blocks as an anti-DoS
4323 : : // measure, unless the blocks have more work than the active chain tip, and
4324 : : // aren't too far ahead of it, so are likely to be attached soon.
4325 : 349078 : bool fAlreadyHave = pindex->nStatus & BLOCK_HAVE_DATA;
4326 [ + - + - ]: 349078 : bool fHasMoreOrSameWork = (ActiveTip() ? pindex->nChainWork >= ActiveTip()->nChainWork : true);
4327 : : // Blocks that are too out-of-order needlessly limit the effectiveness of
4328 : : // pruning, because pruning will not delete block files that contain any
4329 : : // blocks which are too close in height to the tip. Apply this test
4330 : : // regardless of whether pruning is enabled; it should generally be safe to
4331 : : // not process unrequested blocks.
4332 : 349078 : bool fTooFarAhead{pindex->nHeight > ActiveHeight() + int(MIN_BLOCKS_TO_KEEP)};
4333 : :
4334 : : // TODO: Decouple this function from the block download logic by removing fRequested
4335 : : // This requires some new chain data structure to efficiently look up if a
4336 : : // block is in a chain leading to a candidate for best tip, despite not
4337 : : // being such a candidate itself.
4338 : : // Note that this would break the getblockfrompeer RPC
4339 : :
4340 : : // TODO: deal better with return value and error conditions for duplicate
4341 : : // and unrequested blocks.
4342 [ + - ]: 349078 : if (fAlreadyHave) return true;
4343 [ - + ]: 349078 : if (!fRequested) { // If we didn't ask for it:
4344 [ # # ]: 0 : if (pindex->nTx != 0) return true; // This is a previously-processed block that was pruned
4345 [ # # ]: 0 : if (!fHasMoreOrSameWork) return true; // Don't process less-work chains
4346 [ # # ]: 0 : if (fTooFarAhead) return true; // Block height is too high
4347 : :
4348 : : // Protect against DoS attacks from low-work chains.
4349 : : // If our tip is behind, a peer could try to send us
4350 : : // low-work blocks on a fake chain that we would never
4351 : : // request; don't process these.
4352 [ # # ]: 0 : if (pindex->nChainWork < MinimumChainWork()) return true;
4353 : : }
4354 : :
4355 : 349078 : const CChainParams& params{GetParams()};
4356 : :
4357 [ + + + + ]: 681529 : if (!CheckBlock(block, state, params.GetConsensus()) ||
4358 : 332451 : !ContextualCheckBlock(block, state, *this, pindex->pprev)) {
4359 [ + - ]: 16633 : if (Assume(state.IsInvalid())) {
4360 : 16633 : ActiveChainstate().InvalidBlockFound(pindex, state);
4361 : : }
4362 [ + - ]: 16633 : LogError("%s: %s\n", __func__, state.ToString());
4363 : 16633 : return false;
4364 : : }
4365 : :
4366 : : // Header is valid/has work, merkle tree and segwit merkle tree are good...RELAY NOW
4367 : : // (but if it does not build on our best tip, let the SendMessages loop relay it)
4368 [ + + + + : 332445 : if (!IsInitialBlockDownload() && ActiveTip() == pindex->pprev && m_options.signals) {
+ - ]
4369 : 249537 : m_options.signals->NewPoWValidBlock(pindex, pblock);
4370 : : }
4371 : :
4372 : : // Write block to history file
4373 [ + - ]: 332445 : if (fNewBlock) *fNewBlock = true;
4374 : 332445 : try {
4375 : 332445 : FlatFilePos blockPos{};
4376 [ - + ]: 332445 : if (dbp) {
4377 : 0 : blockPos = *dbp;
4378 [ # # ]: 0 : m_blockman.UpdateBlockInfo(block, pindex->nHeight, blockPos);
4379 : : } else {
4380 [ + - ]: 332445 : blockPos = m_blockman.WriteBlock(block, pindex->nHeight);
4381 [ - + ]: 332445 : if (blockPos.IsNull()) {
4382 [ # # ]: 0 : state.Error(strprintf("%s: Failed to find position to write new block to disk", __func__));
4383 : 0 : return false;
4384 : : }
4385 : : }
4386 [ + - ]: 332445 : ReceivedBlockTransactions(block, pindex, blockPos);
4387 [ - - ]: 0 : } catch (const std::runtime_error& e) {
4388 [ - - - - ]: 0 : return FatalError(GetNotifications(), state, strprintf(_("System error while saving block to disk: %s"), e.what()));
4389 : 0 : }
4390 : :
4391 : : // TODO: FlushStateToDisk() handles flushing of both block and chainstate
4392 : : // data, so we should move this to ChainstateManager so that we can be more
4393 : : // intelligent about how we flush.
4394 : : // For now, since FlushStateMode::NONE is used, all that can happen is that
4395 : : // the block files may be pruned, so we can just call this on one
4396 : : // chainstate (particularly if we haven't implemented pruning with
4397 : : // background validation yet).
4398 : 332445 : ActiveChainstate().FlushStateToDisk(state, FlushStateMode::NONE);
4399 : :
4400 : 332445 : CheckBlockIndex();
4401 : :
4402 : 332445 : return true;
4403 : : }
4404 : :
4405 : 366186 : bool ChainstateManager::ProcessNewBlock(const std::shared_ptr<const CBlock>& block, bool force_processing, bool min_pow_checked, bool* new_block)
4406 : : {
4407 : 366186 : AssertLockNotHeld(cs_main);
4408 : :
4409 : 366186 : {
4410 : 366186 : CBlockIndex *pindex = nullptr;
4411 [ + - ]: 366186 : if (new_block) *new_block = false;
4412 [ + - ]: 366186 : BlockValidationState state;
4413 : :
4414 : : // CheckBlock() does not support multi-threaded block validation because CBlock::fChecked can cause data race.
4415 : : // Therefore, the following critical section must include the CheckBlock() call as well.
4416 [ + - ]: 366186 : LOCK(cs_main);
4417 : :
4418 : : // Skipping AcceptBlock() for CheckBlock() failures means that we will never mark a block as invalid if
4419 : : // CheckBlock() fails. This is protective against consensus failure if there are any unknown forms of block
4420 : : // malleability that cause CheckBlock() to fail; see e.g. CVE-2012-2459 and
4421 : : // https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2019-February/016697.html. Because CheckBlock() is
4422 : : // not very expensive, the anti-DoS benefits of caching failure (of a definitely-invalid block) are not substantial.
4423 [ + - ]: 366186 : bool ret = CheckBlock(*block, state, GetConsensus());
4424 [ + + ]: 366186 : if (ret) {
4425 : : // Store to disk
4426 [ + - ]: 359177 : ret = AcceptBlock(block, state, &pindex, force_processing, nullptr, new_block, min_pow_checked);
4427 : : }
4428 [ + + ]: 359177 : if (!ret) {
4429 [ + + ]: 33741 : if (m_options.signals) {
4430 [ + - ]: 19949 : m_options.signals->BlockChecked(block, state);
4431 : : }
4432 [ + - + - ]: 33741 : LogError("%s: AcceptBlock FAILED (%s)\n", __func__, state.ToString());
4433 [ + - ]: 33741 : return false;
4434 : : }
4435 : 399927 : }
4436 : :
4437 : 332445 : NotifyHeaderTip();
4438 : :
4439 [ + - ]: 332445 : BlockValidationState state; // Only used to report errors, not invalidity - ignore it
4440 [ + - + - : 997335 : if (!ActiveChainstate().ActivateBestChain(state, block)) {
+ - + - -
+ ]
4441 [ # # # # ]: 0 : LogError("%s: ActivateBestChain failed (%s)\n", __func__, state.ToString());
4442 : 0 : return false;
4443 : : }
4444 : :
4445 [ + - + - ]: 664890 : Chainstate* bg_chain{WITH_LOCK(cs_main, return HistoricalChainstate())};
4446 [ - + ]: 332445 : BlockValidationState bg_state;
4447 [ - + - - : 332445 : if (bg_chain && !bg_chain->ActivateBestChain(bg_state, block)) {
- - - - -
+ ]
4448 [ # # # # ]: 0 : LogError("%s: [background] ActivateBestChain failed (%s)\n", __func__, bg_state.ToString());
4449 : 0 : return false;
4450 : : }
4451 : :
4452 : : return true;
4453 : 664890 : }
4454 : :
4455 : 20547 : MempoolAcceptResult ChainstateManager::ProcessTransaction(const CTransactionRef& tx, bool test_accept)
4456 : : {
4457 : 20547 : AssertLockHeld(cs_main);
4458 : 20547 : Chainstate& active_chainstate = ActiveChainstate();
4459 [ - + ]: 20547 : if (!active_chainstate.GetMempool()) {
4460 [ # # ]: 0 : TxValidationState state;
4461 [ # # # # : 0 : state.Invalid(TxValidationResult::TX_NO_MEMPOOL, "no-mempool");
# # ]
4462 [ # # # # ]: 0 : return MempoolAcceptResult::Failure(state);
4463 : 0 : }
4464 : 20547 : auto result = AcceptToMemoryPool(active_chainstate, tx, GetTime(), /*bypass_limits=*/ false, test_accept);
4465 [ - + + - : 20547 : active_chainstate.GetMempool()->check(active_chainstate.CoinsTip(), active_chainstate.m_chain.Height() + 1);
+ - ]
4466 [ + - ]: 20547 : return result;
4467 : 20547 : }
4468 : :
4469 : :
4470 : 362658 : BlockValidationState TestBlockValidity(
4471 : : Chainstate& chainstate,
4472 : : const CBlock& block,
4473 : : const bool check_pow,
4474 : : const bool check_merkle_root)
4475 : : {
4476 : : // Lock must be held throughout this function for two reasons:
4477 : : // 1. We don't want the tip to change during several of the validation steps
4478 : : // 2. To prevent a CheckBlock() race condition for fChecked, see ProcessNewBlock()
4479 : 362658 : AssertLockHeld(chainstate.m_chainman.GetMutex());
4480 : :
4481 [ - + ]: 362658 : BlockValidationState state;
4482 [ - + - + ]: 725316 : CBlockIndex* tip{Assert(chainstate.m_chain.Tip())};
4483 : :
4484 [ - + - + ]: 362658 : if (block.hashPrevBlock != *Assert(tip->phashBlock)) {
4485 [ # # # # : 0 : state.Invalid({}, "inconclusive-not-best-prevblk");
# # ]
4486 : 0 : return state;
4487 : : }
4488 : :
4489 : : // For signets CheckBlock() verifies the challenge iff fCheckPow is set.
4490 [ + - - + ]: 362658 : if (!CheckBlock(block, state, chainstate.m_chainman.GetConsensus(), /*fCheckPow=*/check_pow, /*fCheckMerkleRoot=*/check_merkle_root)) {
4491 : : // This should never happen, but belt-and-suspenders don't approve the
4492 : : // block if it does.
4493 [ # # # # ]: 0 : if (state.IsValid()) NONFATAL_UNREACHABLE();
4494 : : return state;
4495 : : }
4496 : :
4497 : : /**
4498 : : * At this point ProcessNewBlock would call AcceptBlock(), but we
4499 : : * don't want to store the block or its header. Run individual checks
4500 : : * instead:
4501 : : * - skip AcceptBlockHeader() because:
4502 : : * - we don't want to update the block index
4503 : : * - we do not care about duplicates
4504 : : * - we already ran CheckBlockHeader() via CheckBlock()
4505 : : * - we already checked for prev-blk-not-found
4506 : : * - we know the tip is valid, so no need to check bad-prevblk
4507 : : * - we already ran CheckBlock()
4508 : : * - do run ContextualCheckBlockHeader()
4509 : : * - do run ContextualCheckBlock()
4510 : : */
4511 : :
4512 [ + - - + ]: 362658 : if (!ContextualCheckBlockHeader(block, state, chainstate.m_chainman, tip)) {
4513 [ # # # # ]: 0 : if (state.IsValid()) NONFATAL_UNREACHABLE();
4514 : : return state;
4515 : : }
4516 : :
4517 [ + - - + ]: 362658 : if (!ContextualCheckBlock(block, state, chainstate.m_chainman, tip)) {
4518 [ # # # # ]: 0 : if (state.IsValid()) NONFATAL_UNREACHABLE();
4519 : : return state;
4520 : : }
4521 : :
4522 : : // We don't want ConnectBlock to update the actual chainstate, so create
4523 : : // a cache on top of it, along with a dummy block index.
4524 : 362658 : CBlockIndex index_dummy{block};
4525 [ + - ]: 362658 : uint256 block_hash(block.GetHash());
4526 : 362658 : index_dummy.pprev = tip;
4527 : 362658 : index_dummy.nHeight = tip->nHeight + 1;
4528 : 362658 : index_dummy.phashBlock = &block_hash;
4529 [ + - + - ]: 362658 : CCoinsViewCache view_dummy(&chainstate.CoinsTip());
4530 : :
4531 : : // Set fJustCheck to true in order to update, and not clear, validation caches.
4532 [ + - - + ]: 362658 : if(!chainstate.ConnectBlock(block, state, &index_dummy, view_dummy, /*fJustCheck=*/true)) {
4533 [ # # # # ]: 0 : if (state.IsValid()) NONFATAL_UNREACHABLE();
4534 : : return state;
4535 : : }
4536 : :
4537 : : // Ensure no check returned successfully while also setting an invalid state.
4538 [ - + - - ]: 362658 : if (!state.IsValid()) NONFATAL_UNREACHABLE();
4539 : :
4540 : : return state;
4541 : 362658 : }
4542 : :
4543 : : /* This function is called from the RPC code for pruneblockchain */
4544 : 0 : void PruneBlockFilesManual(Chainstate& active_chainstate, int nManualPruneHeight)
4545 : : {
4546 [ # # ]: 0 : BlockValidationState state;
4547 [ # # # # ]: 0 : if (!active_chainstate.FlushStateToDisk(
4548 : : state, FlushStateMode::NONE, nManualPruneHeight)) {
4549 [ # # # # ]: 0 : LogWarning("Failed to flush state after manual prune (%s)", state.ToString());
4550 : : }
4551 : 0 : }
4552 : :
4553 : 0 : bool Chainstate::LoadChainTip()
4554 : : {
4555 : 0 : AssertLockHeld(cs_main);
4556 : 0 : const CCoinsViewCache& coins_cache = CoinsTip();
4557 [ # # ]: 0 : assert(!coins_cache.GetBestBlock().IsNull()); // Never called when the coins view is empty
4558 [ # # ]: 0 : CBlockIndex* tip = m_chain.Tip();
4559 : :
4560 [ # # # # ]: 0 : if (tip && tip->GetBlockHash() == coins_cache.GetBestBlock()) {
4561 : : return true;
4562 : : }
4563 : :
4564 : : // Load pointer to end of best chain
4565 : 0 : CBlockIndex* pindex = m_blockman.LookupBlockIndex(coins_cache.GetBestBlock());
4566 [ # # ]: 0 : if (!pindex) {
4567 : : return false;
4568 : : }
4569 : 0 : m_chain.SetTip(*pindex);
4570 : 0 : m_chainman.UpdateIBDStatus();
4571 [ # # ]: 0 : tip = m_chain.Tip();
4572 : :
4573 : : // nSequenceId is one of the keys used to sort setBlockIndexCandidates. Ensure all
4574 : : // candidate sets are empty to avoid UB, as nSequenceId is about to be modified.
4575 [ # # ]: 0 : for (const auto& cs : m_chainman.m_chainstates) {
4576 [ # # ]: 0 : assert(cs->setBlockIndexCandidates.empty());
4577 : : }
4578 : :
4579 : : // Make sure our chain tip before shutting down scores better than any other candidate
4580 : : // to maintain a consistent best tip over reboots in case of a tie.
4581 : : auto target = tip;
4582 [ # # ]: 0 : while (target) {
4583 : 0 : target->nSequenceId = SEQ_ID_BEST_CHAIN_FROM_DISK;
4584 : 0 : target = target->pprev;
4585 : : }
4586 : :
4587 [ # # # # : 0 : LogInfo("Loaded best chain: hashBestChain=%s height=%d date=%s progress=%f",
# # ]
4588 : : tip->GetBlockHash().ToString(),
4589 : : m_chain.Height(),
4590 : : FormatISO8601DateTime(tip->GetBlockTime()),
4591 : : m_chainman.GuessVerificationProgress(tip));
4592 : :
4593 : : // Ensure KernelNotifications m_tip_block is set even if no new block arrives.
4594 [ # # ]: 0 : if (!this->GetRole().historical) {
4595 : : // Ignoring return value for now.
4596 : 0 : (void)m_chainman.GetNotifications().blockTip(
4597 : 0 : /*state=*/GetSynchronizationState(/*init=*/true, m_chainman.m_blockman.m_blockfiles_indexed),
4598 : : /*index=*/*pindex,
4599 : : /*verification_progress=*/m_chainman.GuessVerificationProgress(tip));
4600 : : }
4601 : :
4602 : 0 : CheckForkWarningConditions();
4603 : :
4604 : 0 : return true;
4605 : : }
4606 : :
4607 : 4 : CVerifyDB::CVerifyDB(Notifications& notifications)
4608 : 4 : : m_notifications{notifications}
4609 : : {
4610 [ + - ]: 4 : m_notifications.progress(_("Verifying blocks…"), 0, false);
4611 : 4 : }
4612 : :
4613 : 4 : CVerifyDB::~CVerifyDB()
4614 : : {
4615 : 4 : m_notifications.progress(bilingual_str{}, 100, false);
4616 : 4 : }
4617 : :
4618 : 4 : VerifyDBResult CVerifyDB::VerifyDB(
4619 : : Chainstate& chainstate,
4620 : : const Consensus::Params& consensus_params,
4621 : : CCoinsView& coinsview,
4622 : : int nCheckLevel, int nCheckDepth)
4623 : : {
4624 : 4 : AssertLockHeld(cs_main);
4625 : :
4626 [ - + + - : 8 : if (chainstate.m_chain.Tip() == nullptr || chainstate.m_chain.Tip()->pprev == nullptr) {
- + ]
4627 : : return VerifyDBResult::SUCCESS;
4628 : : }
4629 : :
4630 : : // Verify blocks in the best chain
4631 [ # # # # ]: 0 : if (nCheckDepth <= 0 || nCheckDepth > chainstate.m_chain.Height()) {
4632 : 0 : nCheckDepth = chainstate.m_chain.Height();
4633 : : }
4634 [ # # # # ]: 0 : nCheckLevel = std::max(0, std::min(4, nCheckLevel));
4635 : 0 : LogInfo("Verifying last %i blocks at level %i", nCheckDepth, nCheckLevel);
4636 : 0 : CCoinsViewCache coins(&coinsview);
4637 : 0 : CBlockIndex* pindex;
4638 : 0 : CBlockIndex* pindexFailure = nullptr;
4639 : 0 : int nGoodTransactions = 0;
4640 [ # # ]: 0 : BlockValidationState state;
4641 : 0 : int reportDone = 0;
4642 : 0 : bool skipped_no_block_data{false};
4643 : 0 : bool skipped_l3_checks{false};
4644 [ # # ]: 0 : LogInfo("Verification progress: 0%%");
4645 : :
4646 [ # # ]: 0 : const bool is_snapshot_cs{chainstate.m_from_snapshot_blockhash};
4647 : :
4648 [ # # # # : 0 : for (pindex = chainstate.m_chain.Tip(); pindex && pindex->pprev; pindex = pindex->pprev) {
# # ]
4649 [ # # # # : 0 : const int percentageDone = std::max(1, std::min(99, (int)(((double)(chainstate.m_chain.Height() - pindex->nHeight)) / (double)nCheckDepth * (nCheckLevel >= 4 ? 50 : 100))));
# # # # ]
4650 [ # # ]: 0 : if (reportDone < percentageDone / 10) {
4651 : : // report every 10% step
4652 [ # # ]: 0 : LogInfo("Verification progress: %d%%", percentageDone);
4653 : 0 : reportDone = percentageDone / 10;
4654 : : }
4655 [ # # # # ]: 0 : m_notifications.progress(_("Verifying blocks…"), percentageDone, false);
4656 [ # # # # ]: 0 : if (pindex->nHeight <= chainstate.m_chain.Height() - nCheckDepth) {
4657 : : break;
4658 : : }
4659 [ # # # # : 0 : if ((chainstate.m_blockman.IsPruneMode() || is_snapshot_cs) && !(pindex->nStatus & BLOCK_HAVE_DATA)) {
# # ]
4660 : : // If pruning or running under an assumeutxo snapshot, only go
4661 : : // back as far as we have data.
4662 [ # # ]: 0 : LogInfo("Block verification stopping at height %d (no data). This could be due to pruning or use of an assumeutxo snapshot.", pindex->nHeight);
4663 : : skipped_no_block_data = true;
4664 : : break;
4665 : : }
4666 : 0 : CBlock block;
4667 : : // check level 0: read from disk
4668 [ # # # # ]: 0 : if (!chainstate.m_blockman.ReadBlock(block, *pindex)) {
4669 [ # # # # ]: 0 : LogError("Verification error: ReadBlock failed at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
4670 : 0 : return VerifyDBResult::CORRUPTED_BLOCK_DB;
4671 : : }
4672 : : // check level 1: verify block validity
4673 [ # # # # : 0 : if (nCheckLevel >= 1 && !CheckBlock(block, state, consensus_params)) {
# # ]
4674 [ # # # # : 0 : LogError("Verification error: found bad block at %d, hash=%s (%s)",
# # ]
4675 : : pindex->nHeight, pindex->GetBlockHash().ToString(), state.ToString());
4676 : 0 : return VerifyDBResult::CORRUPTED_BLOCK_DB;
4677 : : }
4678 : : // check level 2: verify undo validity
4679 [ # # ]: 0 : if (nCheckLevel >= 2 && pindex) {
4680 : 0 : CBlockUndo undo;
4681 [ # # ]: 0 : if (!pindex->GetUndoPos().IsNull()) {
4682 [ # # # # ]: 0 : if (!chainstate.m_blockman.ReadBlockUndo(undo, *pindex)) {
4683 [ # # # # ]: 0 : LogError("Verification error: found bad undo data at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
4684 : 0 : return VerifyDBResult::CORRUPTED_BLOCK_DB;
4685 : : }
4686 : : }
4687 : 0 : }
4688 : : // check level 3: check for inconsistencies during memory-only disconnect of tip blocks
4689 [ # # # # : 0 : size_t curr_coins_usage = coins.DynamicMemoryUsage() + chainstate.CoinsTip().DynamicMemoryUsage();
# # ]
4690 : :
4691 [ # # ]: 0 : if (nCheckLevel >= 3) {
4692 [ # # ]: 0 : if (curr_coins_usage <= chainstate.m_coinstip_cache_size_bytes) {
4693 [ # # # # ]: 0 : assert(coins.GetBestBlock() == pindex->GetBlockHash());
4694 [ # # ]: 0 : DisconnectResult res = chainstate.DisconnectBlock(block, pindex, coins);
4695 [ # # ]: 0 : if (res == DISCONNECT_FAILED) {
4696 [ # # # # ]: 0 : LogError("Verification error: irrecoverable inconsistency in block data at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
4697 : 0 : return VerifyDBResult::CORRUPTED_BLOCK_DB;
4698 : : }
4699 [ # # ]: 0 : if (res == DISCONNECT_UNCLEAN) {
4700 : 0 : nGoodTransactions = 0;
4701 : 0 : pindexFailure = pindex;
4702 : : } else {
4703 [ # # ]: 0 : nGoodTransactions += block.vtx.size();
4704 : : }
4705 : : } else {
4706 : : skipped_l3_checks = true;
4707 : : }
4708 : : }
4709 [ # # # # ]: 0 : if (chainstate.m_chainman.m_interrupt) return VerifyDBResult::INTERRUPTED;
4710 : 0 : }
4711 [ # # ]: 0 : if (pindexFailure) {
4712 [ # # # # ]: 0 : LogError("Verification error: coin database inconsistencies found (last %i blocks, %i good transactions before that)", chainstate.m_chain.Height() - pindexFailure->nHeight + 1, nGoodTransactions);
4713 : : return VerifyDBResult::CORRUPTED_BLOCK_DB;
4714 : : }
4715 [ # # ]: 0 : if (skipped_l3_checks) {
4716 [ # # ]: 0 : LogWarning("Skipped verification of level >=3 (insufficient database cache size). Consider increasing -dbcache.");
4717 : : }
4718 : :
4719 : : // store block count as we move pindex at check level >= 4
4720 [ # # ]: 0 : int block_count = chainstate.m_chain.Height() - pindex->nHeight;
4721 : :
4722 : : // check level 4: try reconnecting blocks
4723 [ # # # # ]: 0 : if (nCheckLevel >= 4 && !skipped_l3_checks) {
4724 [ # # # # ]: 0 : while (pindex != chainstate.m_chain.Tip()) {
4725 [ # # # # ]: 0 : const int percentageDone = std::max(1, std::min(99, 100 - (int)(((double)(chainstate.m_chain.Height() - pindex->nHeight)) / (double)nCheckDepth * 50)));
4726 [ # # ]: 0 : if (reportDone < percentageDone / 10) {
4727 : : // report every 10% step
4728 [ # # ]: 0 : LogInfo("Verification progress: %d%%", percentageDone);
4729 : 0 : reportDone = percentageDone / 10;
4730 : : }
4731 [ # # # # ]: 0 : m_notifications.progress(_("Verifying blocks…"), percentageDone, false);
4732 : 0 : pindex = chainstate.m_chain.Next(*pindex);
4733 : 0 : CBlock block;
4734 [ # # # # ]: 0 : if (!chainstate.m_blockman.ReadBlock(block, *pindex)) {
4735 [ # # # # ]: 0 : LogError("Verification error: ReadBlock failed at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
4736 : 0 : return VerifyDBResult::CORRUPTED_BLOCK_DB;
4737 : : }
4738 [ # # # # ]: 0 : if (!chainstate.ConnectBlock(block, state, pindex, coins)) {
4739 [ # # # # : 0 : LogError("Verification error: found unconnectable block at %d, hash=%s (%s)", pindex->nHeight, pindex->GetBlockHash().ToString(), state.ToString());
# # ]
4740 : 0 : return VerifyDBResult::CORRUPTED_BLOCK_DB;
4741 : : }
4742 [ # # # # ]: 0 : if (chainstate.m_chainman.m_interrupt) return VerifyDBResult::INTERRUPTED;
4743 : 0 : }
4744 : : }
4745 : :
4746 [ # # ]: 0 : LogInfo("Verification: checked last %i blocks at level %i", block_count, nCheckLevel);
4747 [ # # # # ]: 0 : if (nCheckLevel >= 3 && !skipped_l3_checks) {
4748 [ # # ]: 0 : LogInfo("Verification: no coin database inconsistencies (%i transactions)", nGoodTransactions);
4749 : : }
4750 : :
4751 [ # # ]: 0 : if (skipped_l3_checks) {
4752 : 0 : return VerifyDBResult::SKIPPED_L3_CHECKS;
4753 : : }
4754 [ # # ]: 0 : if (skipped_no_block_data) {
4755 : 0 : return VerifyDBResult::SKIPPED_MISSING_BLOCKS;
4756 : : }
4757 : : return VerifyDBResult::SUCCESS;
4758 : 0 : }
4759 : :
4760 : : /** Apply the effects of a block on the utxo cache, ignoring that it may already have been applied. */
4761 : 0 : bool Chainstate::RollforwardBlock(const CBlockIndex* pindex, CCoinsViewCache& inputs)
4762 : : {
4763 : 0 : AssertLockHeld(cs_main);
4764 : : // TODO: merge with ConnectBlock
4765 : 0 : CBlock block;
4766 [ # # # # ]: 0 : if (!m_blockman.ReadBlock(block, *pindex)) {
4767 [ # # # # ]: 0 : LogError("ReplayBlock(): ReadBlock failed at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString());
4768 : 0 : return false;
4769 : : }
4770 : :
4771 [ # # ]: 0 : for (const CTransactionRef& tx : block.vtx) {
4772 [ # # ]: 0 : if (!tx->IsCoinBase()) {
4773 [ # # ]: 0 : for (const CTxIn &txin : tx->vin) {
4774 [ # # ]: 0 : inputs.SpendCoin(txin.prevout);
4775 : : }
4776 : : }
4777 : : // Pass check = true as every addition may be an overwrite.
4778 [ # # ]: 0 : AddCoins(inputs, *tx, pindex->nHeight, true);
4779 : : }
4780 : : return true;
4781 : 0 : }
4782 : :
4783 : 3211 : bool Chainstate::ReplayBlocks()
4784 : : {
4785 : 3211 : LOCK(cs_main);
4786 : :
4787 [ + - ]: 3211 : CCoinsView& db = this->CoinsDB();
4788 [ + - ]: 3211 : CCoinsViewCache cache(&db);
4789 : :
4790 [ + - ]: 3211 : std::vector<uint256> hashHeads = db.GetHeadBlocks();
4791 [ - + ]: 3211 : if (hashHeads.empty()) return true; // We're already in a consistent state.
4792 [ # # # # ]: 0 : if (hashHeads.size() != 2) {
4793 [ # # ]: 0 : LogError("ReplayBlocks(): unknown inconsistent state\n");
4794 : : return false;
4795 : : }
4796 : :
4797 [ # # # # ]: 0 : m_chainman.GetNotifications().progress(_("Replaying blocks…"), 0, false);
4798 [ # # ]: 0 : LogInfo("Replaying blocks");
4799 : :
4800 : 0 : const CBlockIndex* pindexOld = nullptr; // Old tip during the interrupted flush.
4801 : 0 : const CBlockIndex* pindexNew; // New tip during the interrupted flush.
4802 : 0 : const CBlockIndex* pindexFork = nullptr; // Latest block common to both the old and the new tip.
4803 : :
4804 [ # # ]: 0 : if (!m_blockman.m_block_index.contains(hashHeads[0])) {
4805 [ # # ]: 0 : LogError("ReplayBlocks(): reorganization to unknown block requested\n");
4806 : : return false;
4807 : : }
4808 [ # # ]: 0 : pindexNew = &(m_blockman.m_block_index[hashHeads[0]]);
4809 : :
4810 [ # # ]: 0 : if (!hashHeads[1].IsNull()) { // The old tip is allowed to be 0, indicating it's the first flush.
4811 [ # # ]: 0 : if (!m_blockman.m_block_index.contains(hashHeads[1])) {
4812 [ - - ]: 3211 : LogError("ReplayBlocks(): reorganization from unknown block requested\n");
4813 : : return false;
4814 : : }
4815 [ # # ]: 0 : pindexOld = &(m_blockman.m_block_index[hashHeads[1]]);
4816 [ # # ]: 0 : pindexFork = LastCommonAncestor(pindexOld, pindexNew);
4817 [ # # ]: 0 : assert(pindexFork != nullptr);
4818 : : }
4819 : :
4820 : : // Rollback along the old branch.
4821 : 0 : const int nForkHeight{pindexFork ? pindexFork->nHeight : 0};
4822 [ # # ]: 0 : if (pindexOld != pindexFork) {
4823 [ # # # # ]: 0 : LogInfo("Rolling back from %s (%i to %i)", pindexOld->GetBlockHash().ToString(), pindexOld->nHeight, nForkHeight);
4824 [ # # ]: 0 : while (pindexOld != pindexFork) {
4825 [ # # ]: 0 : if (pindexOld->nHeight > 0) { // Never disconnect the genesis block.
4826 : 0 : CBlock block;
4827 [ # # # # ]: 0 : if (!m_blockman.ReadBlock(block, *pindexOld)) {
4828 [ # # # # ]: 0 : LogError("RollbackBlock(): ReadBlock() failed at %d, hash=%s\n", pindexOld->nHeight, pindexOld->GetBlockHash().ToString());
4829 : 0 : return false;
4830 : : }
4831 [ # # ]: 0 : if (pindexOld->nHeight % 10'000 == 0) {
4832 [ # # # # ]: 0 : LogInfo("Rolling back %s (%i)", pindexOld->GetBlockHash().ToString(), pindexOld->nHeight);
4833 : : }
4834 [ # # ]: 0 : DisconnectResult res = DisconnectBlock(block, pindexOld, cache);
4835 [ # # ]: 0 : if (res == DISCONNECT_FAILED) {
4836 [ # # # # ]: 0 : LogError("RollbackBlock(): DisconnectBlock failed at %d, hash=%s\n", pindexOld->nHeight, pindexOld->GetBlockHash().ToString());
4837 : 0 : return false;
4838 : : }
4839 : : // If DISCONNECT_UNCLEAN is returned, it means a non-existing UTXO was deleted, or an existing UTXO was
4840 : : // overwritten. It corresponds to cases where the block-to-be-disconnect never had all its operations
4841 : : // applied to the UTXO set. However, as both writing a UTXO and deleting a UTXO are idempotent operations,
4842 : : // the result is still a version of the UTXO set with the effects of that block undone.
4843 : 0 : }
4844 : 0 : pindexOld = pindexOld->pprev;
4845 : : }
4846 [ # # # # ]: 0 : LogInfo("Rolled back to %s", pindexFork->GetBlockHash().ToString());
4847 : : }
4848 : :
4849 : : // Roll forward from the forking point to the new tip.
4850 [ # # ]: 0 : if (nForkHeight < pindexNew->nHeight) {
4851 [ # # # # ]: 0 : LogInfo("Rolling forward to %s (%i to %i)", pindexNew->GetBlockHash().ToString(), nForkHeight, pindexNew->nHeight);
4852 [ # # ]: 0 : for (int nHeight = nForkHeight + 1; nHeight <= pindexNew->nHeight; ++nHeight) {
4853 [ # # # # ]: 0 : const CBlockIndex& pindex{*Assert(pindexNew->GetAncestor(nHeight))};
4854 : :
4855 [ # # ]: 0 : if (nHeight % 10'000 == 0) {
4856 [ # # # # ]: 0 : LogInfo("Rolling forward %s (%i)", pindex.GetBlockHash().ToString(), nHeight);
4857 : : }
4858 [ # # # # ]: 0 : m_chainman.GetNotifications().progress(_("Replaying blocks…"), (int)((nHeight - nForkHeight) * 100.0 / (pindexNew->nHeight - nForkHeight)), false);
4859 [ # # # # ]: 0 : if (!RollforwardBlock(&pindex, cache)) return false;
4860 : : }
4861 [ # # # # ]: 0 : LogInfo("Rolled forward to %s", pindexNew->GetBlockHash().ToString());
4862 : : }
4863 : :
4864 [ # # ]: 0 : cache.SetBestBlock(pindexNew->GetBlockHash());
4865 [ # # ]: 0 : cache.Flush(/*reallocate_cache=*/false); // local CCoinsViewCache goes out of scope
4866 [ # # ]: 0 : m_chainman.GetNotifications().progress(bilingual_str{}, 100, false);
4867 : 0 : return true;
4868 [ + - ]: 6422 : }
4869 : :
4870 : 3211 : bool Chainstate::NeedsRedownload() const
4871 : : {
4872 : 3211 : AssertLockHeld(cs_main);
4873 : :
4874 : : // At and above m_params.SegwitHeight, segwit consensus rules must be validated
4875 [ - + ]: 3211 : CBlockIndex* block{m_chain.Tip()};
4876 : :
4877 [ - + - - ]: 3211 : while (block != nullptr && DeploymentActiveAt(*block, m_chainman, Consensus::DEPLOYMENT_SEGWIT)) {
4878 [ # # ]: 0 : if (!(block->nStatus & BLOCK_OPT_WITNESS)) {
4879 : : // block is insufficiently validated for a segwit client
4880 : : return true;
4881 : : }
4882 : 0 : block = block->pprev;
4883 : : }
4884 : :
4885 : : return false;
4886 : : }
4887 : :
4888 : 0 : void Chainstate::ClearBlockIndexCandidates()
4889 : : {
4890 : 0 : AssertLockHeld(::cs_main);
4891 : 0 : setBlockIndexCandidates.clear();
4892 : 0 : }
4893 : :
4894 : 3267 : void Chainstate::PopulateBlockIndexCandidates()
4895 : : {
4896 : 3267 : AssertLockHeld(::cs_main);
4897 : :
4898 [ + + ]: 17734 : for (CBlockIndex* pindex : m_blockman.GetAllBlockIndices()) {
4899 : : // With assumeutxo, the snapshot block is a candidate for the tip, but it
4900 : : // may not have BLOCK_VALID_TRANSACTIONS (e.g. if we haven't yet downloaded
4901 : : // the block), so we special-case it here.
4902 [ + - + + ]: 14467 : if (pindex == SnapshotBase() ||
4903 [ + + ]: 17734 : (pindex->IsValid(BLOCK_VALID_TRANSACTIONS) &&
4904 [ - + - - ]: 3267 : (pindex->HaveNumChainTxs() || pindex->pprev == nullptr))) {
4905 [ + - ]: 3323 : TryAddBlockIndexCandidate(pindex);
4906 : : }
4907 : : }
4908 : 3267 : }
4909 : :
4910 : 3211 : bool ChainstateManager::LoadBlockIndex()
4911 : : {
4912 : 3211 : AssertLockHeld(cs_main);
4913 : : // Load block index from databases
4914 [ + - ]: 3211 : if (m_blockman.m_blockfiles_indexed) {
4915 : 3211 : bool ret{m_blockman.LoadBlockIndexDB(CurrentChainstate().m_from_snapshot_blockhash)};
4916 [ + - ]: 3211 : if (!ret) return false;
4917 : :
4918 : 3211 : m_blockman.ScanAndUnlinkAlreadyPrunedFiles();
4919 : :
4920 : 3211 : std::vector<CBlockIndex*> vSortedByHeight{m_blockman.GetAllBlockIndices()};
4921 [ + - ]: 3211 : std::sort(vSortedByHeight.begin(), vSortedByHeight.end(),
4922 : : CBlockIndexHeightOnlyComparator());
4923 : :
4924 [ - + ]: 3211 : for (CBlockIndex* pindex : vSortedByHeight) {
4925 [ # # # # ]: 0 : if (m_interrupt) return false;
4926 [ # # # # : 0 : if (pindex->nStatus & BLOCK_FAILED_VALID && (!m_best_invalid || pindex->nChainWork > m_best_invalid->nChainWork)) {
# # # # ]
4927 : 0 : m_best_invalid = pindex;
4928 : : }
4929 [ # # # # : 0 : if (pindex->IsValid(BLOCK_VALID_TREE) && (m_best_header == nullptr || CBlockIndexWorkComparator()(m_best_header, pindex)))
# # # # #
# ]
4930 : 0 : m_best_header = pindex;
4931 : : }
4932 : 3211 : }
4933 : : return true;
4934 : : }
4935 : :
4936 : 3211 : bool Chainstate::LoadGenesisBlock()
4937 : : {
4938 : 3211 : LOCK(cs_main);
4939 : :
4940 [ + - ]: 3211 : const CChainParams& params{m_chainman.GetParams()};
4941 : :
4942 : : // Check whether we're already initialized by checking for genesis in
4943 : : // m_blockman.m_block_index. Note that we can't use m_chain here, since it is
4944 : : // set based on the coins db, not the block index db, which is the only
4945 : : // thing loaded at this point.
4946 [ + - + - ]: 3211 : if (m_blockman.m_block_index.contains(params.GenesisBlock().GetHash()))
4947 : : return true;
4948 : :
4949 : 3211 : try {
4950 [ + - ]: 3211 : const CBlock& block = params.GenesisBlock();
4951 [ + - ]: 3211 : FlatFilePos blockPos{m_blockman.WriteBlock(block, 0)};
4952 [ - + ]: 3211 : if (blockPos.IsNull()) {
4953 [ - - + - ]: 3211 : LogError("%s: writing genesis block to disk failed\n", __func__);
4954 : : return false;
4955 : : }
4956 [ + - ]: 3211 : CBlockIndex* pindex = m_blockman.AddToBlockIndex(block, m_chainman.m_best_header);
4957 [ + - ]: 3211 : m_chainman.ReceivedBlockTransactions(block, pindex, blockPos);
4958 [ - - ]: 0 : } catch (const std::runtime_error& e) {
4959 [ - - ]: 0 : LogError("%s: failed to write genesis block: %s\n", __func__, e.what());
4960 : 0 : return false;
4961 : 0 : }
4962 : :
4963 : : return true;
4964 : 3211 : }
4965 : :
4966 : 698 : void ChainstateManager::LoadExternalBlockFile(
4967 : : AutoFile& file_in,
4968 : : FlatFilePos* dbp,
4969 : : std::multimap<uint256, FlatFilePos>* blocks_with_unknown_parent)
4970 : : {
4971 : : // Either both should be specified (-reindex), or neither (-loadblock).
4972 [ - + ]: 698 : assert(!dbp == !blocks_with_unknown_parent);
4973 : :
4974 : 698 : const auto start{SteadyClock::now()};
4975 [ + - ]: 698 : const CChainParams& params{GetParams()};
4976 : :
4977 : 698 : int nLoaded = 0;
4978 : 698 : try {
4979 [ + - ]: 698 : BufferedFile blkdat{file_in, 2 * MAX_BLOCK_SERIALIZED_SIZE, MAX_BLOCK_SERIALIZED_SIZE + 8};
4980 : : // nRewind indicates where to resume scanning in case something goes wrong,
4981 : : // such as a block fails to deserialize.
4982 : 698 : uint64_t nRewind = blkdat.GetPos();
4983 [ + + ]: 2268871 : while (!blkdat.eof()) {
4984 [ + - - + ]: 2268594 : if (m_interrupt) return;
4985 : :
4986 : 2268594 : blkdat.SetPos(nRewind);
4987 : 2268594 : nRewind++; // start one byte further next time, in case of failure
4988 [ + + ]: 2268594 : blkdat.SetLimit(); // remove former limit
4989 : 2268594 : unsigned int nSize = 0;
4990 : 2268594 : try {
4991 : : // locate a header
4992 : 2268594 : MessageStartChars buf;
4993 [ + + ]: 2268594 : blkdat.FindByte(std::byte(params.MessageStart()[0]));
4994 [ + + ]: 2268221 : nRewind = blkdat.GetPos() + 1;
4995 [ + + ]: 2268221 : blkdat >> buf;
4996 [ + + ]: 2268191 : if (buf != params.MessageStart()) {
4997 : 1884231 : continue;
4998 : : }
4999 : : // read size
5000 [ + + ]: 383960 : blkdat >> nSize;
5001 [ + + ]: 383942 : if (nSize < 80 || nSize > MAX_BLOCK_SERIALIZED_SIZE)
5002 : 51343 : continue;
5003 [ - + ]: 421 : } catch (const std::exception&) {
5004 : : // no valid block header found; don't complain
5005 : : // (this happens at the end of every blk.dat file)
5006 : 421 : break;
5007 : 421 : }
5008 : 332599 : try {
5009 : : // read block header
5010 [ + + ]: 332599 : const uint64_t nBlockPos{blkdat.GetPos()};
5011 [ + + ]: 332599 : if (dbp)
5012 : 158824 : dbp->nPos = nBlockPos;
5013 [ + - ]: 332599 : blkdat.SetLimit(nBlockPos + nSize);
5014 : 332599 : CBlockHeader header;
5015 [ + + ]: 332599 : blkdat >> header;
5016 [ + - ]: 331601 : const uint256 hash{header.GetHash()};
5017 : : // Skip the rest of this block (this may read from disk into memory); position to the marker before the
5018 : : // next block, but it's still possible to rewind to the start of the current block (without a disk read).
5019 : 331601 : nRewind = nBlockPos + nSize;
5020 [ + + ]: 331601 : blkdat.SkipTo(nRewind);
5021 : :
5022 : 330391 : std::shared_ptr<CBlock> pblock{}; // needs to remain available after the cs_main lock is released to avoid duplicate reads from disk
5023 : :
5024 : 330391 : {
5025 [ + - ]: 330391 : LOCK(cs_main);
5026 : : // detect out of order blocks, and store them for later
5027 [ + - + - : 330391 : if (hash != params.GetConsensus().hashGenesisBlock && !m_blockman.LookupBlockIndex(header.hashPrevBlock)) {
+ + ]
5028 [ + - - + : 217642 : LogDebug(BCLog::REINDEX, "%s: Out of order block %s, parent %s not known\n", __func__, hash.ToString(),
- - - - -
- ]
5029 : : header.hashPrevBlock.ToString());
5030 [ + + ]: 217642 : if (dbp && blocks_with_unknown_parent) {
5031 [ + - ]: 117048 : blocks_with_unknown_parent->emplace(header.hashPrevBlock, *dbp);
5032 : : }
5033 [ + - ]: 217642 : continue;
5034 : : }
5035 : :
5036 : : // process in case the block isn't known yet
5037 [ + - ]: 112749 : const CBlockIndex* pindex = m_blockman.LookupBlockIndex(hash);
5038 [ + + + - ]: 112749 : if (!pindex || (pindex->nStatus & BLOCK_HAVE_DATA) == 0) {
5039 : : // This block can be processed immediately; rewind to its start, read and deserialize it.
5040 : 112749 : blkdat.SetPos(nBlockPos);
5041 [ + - - + ]: 225498 : pblock = std::make_shared<CBlock>();
5042 [ + + ]: 112749 : blkdat >> TX_WITH_WITNESS(*pblock);
5043 [ + - ]: 79576 : nRewind = blkdat.GetPos();
5044 : :
5045 [ + - ]: 79576 : BlockValidationState state;
5046 [ + - + - : 238728 : if (AcceptBlock(pblock, state, nullptr, true, dbp, nullptr, true)) {
+ - - + ]
5047 : 0 : nLoaded++;
5048 : : }
5049 [ + - ]: 79576 : if (state.IsError()) {
5050 : : break;
5051 : : }
5052 [ - - - - : 79576 : } else if (hash != params.GetConsensus().hashGenesisBlock && pindex->nHeight % 1000 == 0) {
- - ]
5053 [ # # # # : 0 : LogDebug(BCLog::REINDEX, "Block Import: already had block %s at height %d\n", hash.ToString(), pindex->nHeight);
# # # # ]
5054 : : }
5055 : 250815 : }
5056 : :
5057 : : // Activate the genesis block so normal node progress can continue
5058 : : // During first -reindex, this will only connect Genesis since
5059 : : // ActivateBestChain only connects blocks which are in the block tree db,
5060 : : // which only contains blocks whose parents are in it.
5061 : : // But do this only if genesis isn't activated yet, to avoid connecting many blocks
5062 : : // without assumevalid in the case of a continuation of a reindex that
5063 : : // was interrupted by the user.
5064 [ - + - - : 79576 : if (hash == params.GetConsensus().hashGenesisBlock && WITH_LOCK(::cs_main, return ActiveHeight()) == -1) {
- - - - -
- ]
5065 [ # # ]: 0 : BlockValidationState state;
5066 [ # # # # : 0 : if (!ActiveChainstate().ActivateBestChain(state, nullptr)) {
# # # # ]
5067 : : break;
5068 : : }
5069 : 0 : }
5070 : :
5071 [ - + - - : 79576 : if (m_blockman.IsPruneMode() && m_blockman.m_blockfiles_indexed && pblock) {
- - ]
5072 : : // must update the tip for pruning to work while importing with -loadblock.
5073 : : // this is a tradeoff to conserve disk space at the expense of time
5074 : : // spent updating the tip to be able to prune.
5075 : : // otherwise, ActivateBestChain won't be called by the import process
5076 : : // until after all of the block files are loaded. ActivateBestChain can be
5077 : : // called by concurrent network message processing. but, that is not
5078 : : // reliable for the purpose of pruning while importing.
5079 [ # # # # ]: 0 : if (auto result{ActivateBestChains()}; !result) {
5080 [ # # # # : 0 : LogDebug(BCLog::REINDEX, "%s\n", util::ErrorString(result).original);
# # # # ]
5081 : 0 : break;
5082 : 0 : }
5083 : : }
5084 : :
5085 [ + - ]: 79576 : NotifyHeaderTip();
5086 : :
5087 [ + + ]: 79576 : if (!blocks_with_unknown_parent) continue;
5088 : :
5089 : : // Recursively process earlier encountered successors of this block
5090 [ + - ]: 28765 : std::deque<uint256> queue;
5091 [ + - ]: 28765 : queue.push_back(hash);
5092 [ + + ]: 57530 : while (!queue.empty()) {
5093 : 28765 : uint256 head = queue.front();
5094 : 28765 : queue.pop_front();
5095 : 28765 : auto range = blocks_with_unknown_parent->equal_range(head);
5096 [ + + ]: 50015 : while (range.first != range.second) {
5097 : 21250 : std::multimap<uint256, FlatFilePos>::iterator it = range.first;
5098 [ + - ]: 21250 : std::shared_ptr<CBlock> pblockrecursive = std::make_shared<CBlock>();
5099 [ + - - + ]: 21250 : if (m_blockman.ReadBlock(*pblockrecursive, it->second, {})) {
5100 [ # # ]: 0 : const auto& block_hash{pblockrecursive->GetHash()};
5101 [ # # # # : 0 : LogDebug(BCLog::REINDEX, "%s: Processing out of order child %s of %s", __func__, block_hash.ToString(), head.ToString());
# # # # #
# ]
5102 [ # # ]: 0 : LOCK(cs_main);
5103 [ # # ]: 0 : BlockValidationState dummy;
5104 [ # # # # : 0 : if (AcceptBlock(pblockrecursive, dummy, nullptr, true, &it->second, nullptr, true)) {
# # # # ]
5105 : 0 : nLoaded++;
5106 [ # # ]: 0 : queue.push_back(block_hash);
5107 : : }
5108 [ # # ]: 0 : }
5109 : 21250 : range.first++;
5110 : 21250 : blocks_with_unknown_parent->erase(it);
5111 [ + - ]: 21250 : NotifyHeaderTip();
5112 : 21250 : }
5113 : : }
5114 [ + - - + ]: 361364 : } catch (const std::exception& e) {
5115 : : // historical bugs added extra data to the block files that does not deserialize cleanly.
5116 : : // commonly this data is between readable blocks, but it does not really matter. such data is not fatal to the import process.
5117 : : // the code that reads the block files deals with invalid data by simply ignoring it.
5118 : : // it continues to search for the next {4 byte magic message start bytes + 4 byte length + block} that does deserialize cleanly
5119 : : // and passes all of the other block validation checks dealing with POW and the merkle root, etc...
5120 : : // we merely note with this informational log message when unexpected data is encountered.
5121 : : // we could also be experiencing a storage system read error, or a read of a previous bad write. these are possible, but
5122 : : // less likely scenarios. we don't have enough information to tell a difference here.
5123 : : // the reindex process is not the place to attempt to clean and/or compact the block files. if so desired, a studious node operator
5124 : : // may use knowledge of the fact that the block files are not entirely pristine in order to prepare a set of pristine, and
5125 : : // perhaps ordered, block files for later reindexing.
5126 [ + - - + : 35381 : LogDebug(BCLog::REINDEX, "%s: unexpected data at file offset 0x%x - %s. continuing\n", __func__, (nRewind - 1), e.what());
- - ]
5127 : 35381 : }
5128 : : }
5129 [ - - ]: 698 : } catch (const std::runtime_error& e) {
5130 [ - - - - ]: 0 : GetNotifications().fatalError(strprintf(_("System error while loading external block file: %s"), e.what()));
5131 : 0 : }
5132 : 698 : LogInfo("Loaded %i blocks from external file in %dms", nLoaded, Ticks<std::chrono::milliseconds>(SteadyClock::now() - start));
5133 : : }
5134 : :
5135 : 1274651 : bool ChainstateManager::ShouldCheckBlockIndex() const
5136 : : {
5137 : : // Assert to verify Flatten() has been called.
5138 [ - + + - ]: 1274651 : if (!*Assert(m_options.check_block_index)) return false;
5139 [ - + ]: 1274651 : if (FastRandomContext().randrange(*m_options.check_block_index) >= 1) return false;
5140 : : return true;
5141 : : }
5142 : :
5143 : 1274651 : void ChainstateManager::CheckBlockIndex() const
5144 : : {
5145 [ + - ]: 1274651 : if (!ShouldCheckBlockIndex()) {
5146 : : return;
5147 : : }
5148 : :
5149 : 1274651 : LOCK(cs_main);
5150 : :
5151 : : // During a reindex, we read the genesis block and call CheckBlockIndex before ActivateBestChain,
5152 : : // so we have the genesis block in m_blockman.m_block_index but no active chain. (A few of the
5153 : : // tests when iterating the block tree require that m_chain has been initialized.)
5154 [ + - - + : 1274651 : if (ActiveChain().Height() < 0) {
- + ]
5155 [ # # ]: 0 : assert(m_blockman.m_block_index.size() <= 1);
5156 [ # # ]: 0 : return;
5157 : : }
5158 : :
5159 : : // Build forward-pointing data structure for the entire block tree.
5160 : : // For performance reasons, indexes of the best header chain are stored in a vector (within CChain).
5161 : : // All remaining blocks are stored in a multimap.
5162 : : // The best header chain can differ from the active chain: E.g. its entries may belong to blocks that
5163 : : // are not yet validated.
5164 : 1274651 : CChain best_hdr_chain;
5165 [ - + ]: 1274651 : assert(m_best_header);
5166 [ - + ]: 1274651 : assert(!(m_best_header->nStatus & BLOCK_FAILED_VALID));
5167 [ + - ]: 1274651 : best_hdr_chain.SetTip(*m_best_header);
5168 : :
5169 : 1274651 : std::multimap<const CBlockIndex*, const CBlockIndex*> forward;
5170 [ + + + + ]: 136106849 : for (auto& [_, block_index] : m_blockman.m_block_index) {
5171 : : // Only save indexes in forward that are not part of the best header chain.
5172 [ + + ]: 134832198 : if (!best_hdr_chain.Contains(block_index)) {
5173 : : // Only genesis, which must be part of the best header chain, can have a nullptr parent.
5174 [ - + ]: 23180239 : assert(block_index.pprev);
5175 [ + - ]: 23180239 : forward.emplace(block_index.pprev, &block_index);
5176 : : }
5177 : : }
5178 [ - + - + ]: 1274651 : assert(forward.size() + best_hdr_chain.Height() + 1 == m_blockman.m_block_index.size());
5179 : :
5180 [ + - ]: 1274651 : const CBlockIndex* pindex = best_hdr_chain[0];
5181 [ - + ]: 1274651 : assert(pindex);
5182 : : // Iterate over the entire block tree, using depth-first search.
5183 : : // Along the way, remember whether there are blocks on the path from genesis
5184 : : // block being explored which are the first to have certain properties.
5185 : 1274651 : size_t nNodes = 0;
5186 : 1274651 : int nHeight = 0;
5187 : 1274651 : const CBlockIndex* pindexFirstInvalid = nullptr; // Oldest ancestor of pindex which is invalid.
5188 : 1274651 : const CBlockIndex* pindexFirstMissing = nullptr; // Oldest ancestor of pindex which does not have BLOCK_HAVE_DATA, since assumeutxo snapshot if used.
5189 : 1274651 : const CBlockIndex* pindexFirstNeverProcessed = nullptr; // Oldest ancestor of pindex for which nTx == 0, since assumeutxo snapshot if used.
5190 : 1274651 : const CBlockIndex* pindexFirstNotTreeValid = nullptr; // Oldest ancestor of pindex which does not have BLOCK_VALID_TREE (regardless of being valid or not).
5191 : 1274651 : const CBlockIndex* pindexFirstNotTransactionsValid = nullptr; // Oldest ancestor of pindex which does not have BLOCK_VALID_TRANSACTIONS (regardless of being valid or not), since assumeutxo snapshot if used.
5192 : 1274651 : const CBlockIndex* pindexFirstNotChainValid = nullptr; // Oldest ancestor of pindex which does not have BLOCK_VALID_CHAIN (regardless of being valid or not), since assumeutxo snapshot if used.
5193 : 1274651 : const CBlockIndex* pindexFirstNotScriptsValid = nullptr; // Oldest ancestor of pindex which does not have BLOCK_VALID_SCRIPTS (regardless of being valid or not), since assumeutxo snapshot if used.
5194 : :
5195 : : // After checking an assumeutxo snapshot block, reset pindexFirst pointers
5196 : : // to earlier blocks that have not been downloaded or validated yet, so
5197 : : // checks for later blocks can assume the earlier blocks were validated and
5198 : : // be stricter, testing for more requirements.
5199 [ + - ]: 1274651 : const CBlockIndex* snap_base{CurrentChainstate().SnapshotBase()};
5200 : 1274651 : const CBlockIndex *snap_first_missing{}, *snap_first_notx{}, *snap_first_notv{}, *snap_first_nocv{}, *snap_first_nosv{};
5201 : 159287088 : auto snap_update_firsts = [&] {
5202 [ - + ]: 158012437 : if (pindex == snap_base) {
5203 : 0 : std::swap(snap_first_missing, pindexFirstMissing);
5204 : 0 : std::swap(snap_first_notx, pindexFirstNeverProcessed);
5205 : 0 : std::swap(snap_first_notv, pindexFirstNotTransactionsValid);
5206 : 0 : std::swap(snap_first_nocv, pindexFirstNotChainValid);
5207 : 0 : std::swap(snap_first_nosv, pindexFirstNotScriptsValid);
5208 : : }
5209 : 159287088 : };
5210 : :
5211 [ + + ]: 134848106 : while (pindex != nullptr) {
5212 : 134832198 : nNodes++;
5213 [ + + + + ]: 134832198 : if (pindexFirstInvalid == nullptr && pindex->nStatus & BLOCK_FAILED_VALID) pindexFirstInvalid = pindex;
5214 [ + + + + ]: 134832198 : if (pindexFirstMissing == nullptr && !(pindex->nStatus & BLOCK_HAVE_DATA)) {
5215 : 22040345 : pindexFirstMissing = pindex;
5216 : : }
5217 [ + + + + ]: 134832198 : if (pindexFirstNeverProcessed == nullptr && pindex->nTx == 0) pindexFirstNeverProcessed = pindex;
5218 [ + + + - : 134832198 : if (pindex->pprev != nullptr && pindexFirstNotTreeValid == nullptr && (pindex->nStatus & BLOCK_VALID_MASK) < BLOCK_VALID_TREE) pindexFirstNotTreeValid = pindex;
- + ]
5219 : :
5220 [ + + ]: 134832198 : if (pindex->pprev != nullptr) {
5221 [ + + ]: 133557547 : if (pindexFirstNotTransactionsValid == nullptr &&
5222 [ + + ]: 119895684 : (pindex->nStatus & BLOCK_VALID_MASK) < BLOCK_VALID_TRANSACTIONS) {
5223 : 22046649 : pindexFirstNotTransactionsValid = pindex;
5224 : : }
5225 : :
5226 [ + + ]: 133557547 : if (pindexFirstNotChainValid == nullptr &&
5227 [ + + ]: 119889719 : (pindex->nStatus & BLOCK_VALID_MASK) < BLOCK_VALID_CHAIN) {
5228 : 23196348 : pindexFirstNotChainValid = pindex;
5229 : : }
5230 : :
5231 [ + + ]: 133557547 : if (pindexFirstNotScriptsValid == nullptr &&
5232 [ + + ]: 119889719 : (pindex->nStatus & BLOCK_VALID_MASK) < BLOCK_VALID_SCRIPTS) {
5233 : 23196348 : pindexFirstNotScriptsValid = pindex;
5234 : : }
5235 : : }
5236 : :
5237 : : // Begin: actual consistency checks.
5238 [ + + ]: 134832198 : if (pindex->pprev == nullptr) {
5239 : : // Genesis block checks.
5240 [ - + ]: 1274651 : assert(pindex->GetBlockHash() == GetConsensus().hashGenesisBlock); // Genesis block's hash must match.
5241 [ + + ]: 2549302 : for (const auto& c : m_chainstates) {
5242 [ - + + - ]: 3823953 : if (c->m_chain.Genesis() != nullptr) {
5243 [ - + ]: 1274651 : assert(pindex == c->m_chain.Genesis()); // The chain's genesis block must be this block.
5244 : : }
5245 : : }
5246 : : }
5247 : : // nSequenceId can't be set higher than SEQ_ID_INIT_FROM_DISK{1} for blocks that aren't linked
5248 : : // (negative is used for preciousblock, SEQ_ID_BEST_CHAIN_FROM_DISK{0} for active chain when loaded from disk)
5249 [ + + - + ]: 134832198 : if (!pindex->HaveNumChainTxs()) assert(pindex->nSequenceId <= SEQ_ID_INIT_FROM_DISK);
5250 : : // VALID_TRANSACTIONS is equivalent to nTx > 0 for all nodes (whether or not pruning has occurred).
5251 : : // HAVE_DATA is only equivalent to nTx > 0 (or VALID_TRANSACTIONS) if no pruning has occurred.
5252 [ + + ]: 134832198 : if (!m_blockman.m_have_pruned) {
5253 : : // If we've never pruned, then HAVE_DATA should be equivalent to nTx > 0
5254 [ - + ]: 134812267 : assert(!(pindex->nStatus & BLOCK_HAVE_DATA) == (pindex->nTx == 0));
5255 [ - + ]: 134812267 : assert(pindexFirstMissing == pindexFirstNeverProcessed);
5256 : : } else {
5257 : : // If we have pruned, then we can only say that HAVE_DATA implies nTx > 0
5258 [ + + - + ]: 19931 : if (pindex->nStatus & BLOCK_HAVE_DATA) assert(pindex->nTx > 0);
5259 : : }
5260 [ + + - + ]: 134832198 : if (pindex->nStatus & BLOCK_HAVE_UNDO) assert(pindex->nStatus & BLOCK_HAVE_DATA);
5261 [ - + - - : 134832198 : if (snap_base && snap_base->GetAncestor(pindex->nHeight) == pindex) {
- - ]
5262 : : // Assumed-valid blocks should connect to the main chain.
5263 [ # # ]: 0 : assert((pindex->nStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_TREE);
5264 : : }
5265 : : // There should only be an nTx value if we have
5266 : : // actually seen a block's transactions.
5267 [ - + ]: 134832198 : assert(((pindex->nStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_TRANSACTIONS) == (pindex->nTx > 0)); // This is pruning-independent.
5268 : : // All parents having had data (at some point) is equivalent to all parents being VALID_TRANSACTIONS, which is equivalent to HaveNumChainTxs().
5269 : : // HaveNumChainTxs will also be set in the assumeutxo snapshot block from snapshot metadata.
5270 [ + + + - : 170540710 : assert((pindexFirstNeverProcessed == nullptr || pindex == snap_base) == pindex->HaveNumChainTxs());
- + ]
5271 [ + + + - : 170540710 : assert((pindexFirstNotTransactionsValid == nullptr || pindex == snap_base) == pindex->HaveNumChainTxs());
- + ]
5272 [ - + ]: 134832198 : assert(pindex->nHeight == nHeight); // nHeight must be consistent.
5273 [ + + + - : 134832198 : assert(pindex->pprev == nullptr || pindex->nChainWork >= pindex->pprev->nChainWork); // For every block except the genesis block, the chainwork must be larger than the parent's.
- + ]
5274 [ + + + - : 134832198 : assert(nHeight < 2 || (pindex->pskip && (pindex->pskip->nHeight < nHeight))); // The pskip pointer must point back for all but the first 2 blocks.
- + ]
5275 [ - + ]: 134832198 : assert(pindexFirstNotTreeValid == nullptr); // All m_blockman.m_block_index entries must at least be TREE valid
5276 : 134832198 : if ((pindex->nStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_TREE) assert(pindexFirstNotTreeValid == nullptr); // TREE valid implies all parents are TREE valid
5277 [ + + - + ]: 134832198 : if ((pindex->nStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_CHAIN) assert(pindexFirstNotChainValid == nullptr); // CHAIN valid implies all parents are CHAIN valid
5278 [ + + - + ]: 134832198 : if ((pindex->nStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_SCRIPTS) assert(pindexFirstNotScriptsValid == nullptr); // SCRIPTS valid implies all parents are SCRIPTS valid
5279 [ + + ]: 134832198 : if (pindexFirstInvalid == nullptr) {
5280 : : // Checks for not-invalid blocks.
5281 [ - + ]: 128420493 : assert((pindex->nStatus & BLOCK_FAILED_VALID) == 0); // The failed flag cannot be set for blocks without invalid parents.
5282 : : } else {
5283 [ - + ]: 6411705 : assert(pindex->nStatus & BLOCK_FAILED_VALID); // Invalid blocks and their descendants must be marked as invalid
5284 : : }
5285 : : // Make sure m_chain_tx_count sum is correctly computed.
5286 [ + + ]: 134832198 : if (!pindex->pprev) {
5287 : : // If no previous block, nTx and m_chain_tx_count must be the same.
5288 [ - + ]: 1274651 : assert(pindex->m_chain_tx_count == pindex->nTx);
5289 [ + + + + ]: 133557547 : } else if (pindex->pprev->m_chain_tx_count > 0 && pindex->nTx > 0) {
5290 : : // If previous m_chain_tx_count is set and number of transactions in block is known, sum must be set.
5291 [ - + ]: 97849035 : assert(pindex->m_chain_tx_count == pindex->nTx + pindex->pprev->m_chain_tx_count);
5292 : : } else {
5293 : : // Otherwise m_chain_tx_count should only be set if this is a snapshot
5294 : : // block, and must be set if it is.
5295 [ - + ]: 35708512 : assert((pindex->m_chain_tx_count != 0) == (pindex == snap_base));
5296 : : }
5297 : : // There should be no block with more work than m_best_header, unless it's known to be invalid
5298 [ + + + - : 134832198 : assert((pindex->nStatus & BLOCK_FAILED_VALID) || pindex->nChainWork <= m_best_header->nChainWork);
- + ]
5299 : :
5300 : : // Chainstate-specific checks on setBlockIndexCandidates
5301 [ + + ]: 269664396 : for (const auto& c : m_chainstates) {
5302 [ - + - + ]: 269664396 : if (c->m_chain.Tip() == nullptr) continue;
5303 : : // Two main factors determine whether pindex is a candidate in
5304 : : // setBlockIndexCandidates:
5305 : : //
5306 : : // - If pindex has less work than the chain tip, it should not be a
5307 : : // candidate, and this will be asserted below. Otherwise it is a
5308 : : // potential candidate.
5309 : : //
5310 : : // - If pindex or one of its parent blocks back to the genesis block
5311 : : // or an assumeutxo snapshot never downloaded transactions
5312 : : // (pindexFirstNeverProcessed is non-null), it should not be a
5313 : : // candidate, and this will be asserted below. The only exception
5314 : : // is if pindex itself is an assumeutxo snapshot block. Then it is
5315 : : // also a potential candidate.
5316 [ + - + + : 134832198 : if (!CBlockIndexWorkComparator()(pindex, c->m_chain.Tip()) && (pindexFirstNeverProcessed == nullptr || pindex == snap_base)) {
+ + + - ]
5317 : : // If pindex was detected as invalid (pindexFirstInvalid is
5318 : : // non-null), it is not required to be in
5319 : : // setBlockIndexCandidates.
5320 [ + + ]: 1745037 : if (pindexFirstInvalid == nullptr) {
5321 : : // If pindex and all its parents back to the genesis block
5322 : : // or an assumeutxo snapshot block downloaded transactions,
5323 : : // and the transactions were not pruned (pindexFirstMissing
5324 : : // is null), it is a potential candidate. The check
5325 : : // excludes pruned blocks, because if any blocks were
5326 : : // pruned between pindex and the current chain tip, pindex will
5327 : : // only temporarily be added to setBlockIndexCandidates,
5328 : : // before being moved to m_blocks_unlinked. This check
5329 : : // could be improved to verify that if all blocks between
5330 : : // the chain tip and pindex have data, pindex must be a
5331 : : // candidate.
5332 : : //
5333 : : // If pindex is the chain tip, it also is a potential
5334 : : // candidate.
5335 : : //
5336 : : // If the chainstate was loaded from a snapshot and pindex
5337 : : // is the base of the snapshot, pindex is also a potential
5338 : : // candidate.
5339 [ + + - + : 1608314 : if (pindexFirstMissing == nullptr || pindex == c->m_chain.Tip() || pindex == c->SnapshotBase()) {
+ + + - -
+ ]
5340 : : // If this chainstate is not a historical chainstate
5341 : : // targeting a specific block, pindex must be in
5342 : : // setBlockIndexCandidates. Otherwise, pindex only
5343 : : // needs to be added if it is an ancestor of the target
5344 : : // block.
5345 [ + - - + : 1607291 : if (!c->TargetBlock() || c->TargetBlock()->GetAncestor(pindex->nHeight) == pindex) {
- - - - -
- ]
5346 [ + - - + ]: 1607291 : assert(c->setBlockIndexCandidates.contains(pindex));
5347 : : }
5348 : : }
5349 : : // If some parent is missing, then it could be that this block was in
5350 : : // setBlockIndexCandidates but had to be removed because of the missing data.
5351 : : // In this case it must be in m_blocks_unlinked -- see test below.
5352 : : }
5353 : : } else { // If this block sorts worse than the current tip or some ancestor's block has never been seen, it cannot be in setBlockIndexCandidates.
5354 [ + - - + ]: 133087161 : assert(!c->setBlockIndexCandidates.contains(pindex));
5355 : : }
5356 : : }
5357 : : // Check whether this block is in m_blocks_unlinked.
5358 : 134832198 : auto rangeUnlinked{m_blockman.m_blocks_unlinked.equal_range(pindex->pprev)};
5359 : 134832198 : bool foundInUnlinked = false;
5360 [ + + ]: 134861864 : while (rangeUnlinked.first != rangeUnlinked.second) {
5361 [ - + ]: 41007 : assert(rangeUnlinked.first->first == pindex->pprev);
5362 [ + + ]: 41007 : if (rangeUnlinked.first->second == pindex) {
5363 : : foundInUnlinked = true;
5364 : : break;
5365 : : }
5366 : 29666 : rangeUnlinked.first++;
5367 : : }
5368 [ + + + + : 134832198 : if (pindex->pprev && (pindex->nStatus & BLOCK_HAVE_DATA) && pindexFirstNeverProcessed != nullptr && pindexFirstInvalid == nullptr) {
+ + + + ]
5369 : : // If this block has block data available, some parent was never received, and has no invalid parents, it must be in m_blocks_unlinked.
5370 [ - + ]: 11130 : assert(foundInUnlinked);
5371 : : }
5372 [ + + - + ]: 134832198 : if (!(pindex->nStatus & BLOCK_HAVE_DATA)) assert(!foundInUnlinked); // Can't be in m_blocks_unlinked if we don't HAVE_DATA
5373 [ + + - + ]: 134832198 : if (pindexFirstMissing == nullptr) assert(!foundInUnlinked); // We aren't missing data for any parent -- cannot be in m_blocks_unlinked.
5374 [ + + + + : 134832198 : if (pindex->pprev && (pindex->nStatus & BLOCK_HAVE_DATA) && pindexFirstNeverProcessed == nullptr && pindexFirstMissing != nullptr) {
+ + + + ]
5375 : : // We HAVE_DATA for this block, have received data for all parents at some point, but we're currently missing data for some parent.
5376 [ - + ]: 2177 : assert(m_blockman.m_have_pruned);
5377 : : // This block may have entered m_blocks_unlinked if:
5378 : : // - it has a descendant that at some point had more work than the
5379 : : // tip, and
5380 : : // - we tried switching to that descendant but were missing
5381 : : // data for some intermediate block between m_chain and the
5382 : : // tip.
5383 : : // So if this block is itself better than any m_chain.Tip() and it wasn't in
5384 : : // setBlockIndexCandidates, then it must be in m_blocks_unlinked.
5385 [ + + ]: 4354 : for (const auto& c : m_chainstates) {
5386 [ - + + - : 4354 : if (!CBlockIndexWorkComparator()(pindex, c->m_chain.Tip()) && !c->setBlockIndexCandidates.contains(pindex)) {
+ + + - +
+ ]
5387 [ - + ]: 886 : if (pindexFirstInvalid == nullptr) {
5388 [ # # # # : 0 : if (!c->TargetBlock() || c->TargetBlock()->GetAncestor(pindex->nHeight) == pindex) {
# # # # #
# ]
5389 [ # # ]: 0 : assert(foundInUnlinked);
5390 : : }
5391 : : }
5392 : : }
5393 : : }
5394 : : }
5395 : : // assert(pindex->GetBlockHash() == pindex->GetBlockHeader().GetHash()); // Perhaps too slow
5396 : : // End: actual consistency checks.
5397 : :
5398 : :
5399 : : // Try descending into the first subnode. Always process forks first and the best header chain after.
5400 : 134832198 : snap_update_firsts();
5401 : 134832198 : auto range{forward.equal_range(pindex)};
5402 [ + + ]: 134832198 : if (range.first != range.second) {
5403 : : // A subnode not part of the best header chain was found.
5404 : 963852 : pindex = range.first->second;
5405 : 963852 : nHeight++;
5406 : 963852 : continue;
5407 [ + + ]: 133868346 : } else if (best_hdr_chain.Contains(*pindex)) {
5408 : : // Descend further into best header chain.
5409 : 110982228 : nHeight++;
5410 [ + - ]: 110982228 : pindex = best_hdr_chain[nHeight];
5411 [ + + ]: 110982228 : if (!pindex) break; // we are finished, since the best header chain is always processed last
5412 : 109723485 : continue;
5413 : : }
5414 : : // This is a leaf node.
5415 : : // Move upwards until we reach a node of which we have not yet visited the last child.
5416 [ + - ]: 23180239 : while (pindex) {
5417 : : // We are going to either move to a parent or a sibling of pindex.
5418 : 23180239 : snap_update_firsts();
5419 : : // If pindex was the first with a certain property, unset the corresponding variable.
5420 [ + + ]: 23180239 : if (pindex == pindexFirstInvalid) pindexFirstInvalid = nullptr;
5421 [ + + ]: 23180239 : if (pindex == pindexFirstMissing) pindexFirstMissing = nullptr;
5422 [ + + ]: 23180239 : if (pindex == pindexFirstNeverProcessed) pindexFirstNeverProcessed = nullptr;
5423 [ - + ]: 23180239 : if (pindex == pindexFirstNotTreeValid) pindexFirstNotTreeValid = nullptr;
5424 [ + + ]: 23180239 : if (pindex == pindexFirstNotTransactionsValid) pindexFirstNotTransactionsValid = nullptr;
5425 [ + + ]: 23180239 : if (pindex == pindexFirstNotChainValid) pindexFirstNotChainValid = nullptr;
5426 [ + + ]: 23180239 : if (pindex == pindexFirstNotScriptsValid) pindexFirstNotScriptsValid = nullptr;
5427 : : // Find our parent.
5428 : 23180239 : CBlockIndex* pindexPar = pindex->pprev;
5429 : : // Find which child we just visited.
5430 : 23180239 : auto rangePar{forward.equal_range(pindexPar)};
5431 [ + + ]: 3144537746 : while (rangePar.first->second != pindex) {
5432 [ - + ]: 3121357507 : assert(rangePar.first != rangePar.second); // Our parent must have at least the node we're coming from as child.
5433 : 3121357507 : rangePar.first++;
5434 : : }
5435 : : // Proceed to the next one.
5436 : 23180239 : rangePar.first++;
5437 [ + + ]: 23180239 : if (rangePar.first != rangePar.second) {
5438 : : // Move to a sibling not part of the best header chain.
5439 : 22216387 : pindex = rangePar.first->second;
5440 : 22216387 : break;
5441 [ + - + + ]: 1927704 : } else if (pindexPar == best_hdr_chain[nHeight - 1]) {
5442 : : // Move to pindex's sibling on the best-chain, if it has one.
5443 [ + - ]: 669731 : pindex = best_hdr_chain[nHeight];
5444 : : // There will not be a next block if (and only if) parent block is the best header.
5445 [ - + - + ]: 1339462 : assert((pindex == nullptr) == (pindexPar == best_hdr_chain.Tip()));
5446 : : break;
5447 : : } else {
5448 : : // Move up further.
5449 : 294121 : pindex = pindexPar;
5450 : 294121 : nHeight--;
5451 : 294121 : continue;
5452 : : }
5453 : : }
5454 : : }
5455 : :
5456 : : // Check that we actually traversed the entire block index.
5457 [ - + - + ]: 1274651 : assert(nNodes == forward.size() + best_hdr_chain.Height() + 1);
5458 [ + - ]: 2549302 : }
5459 : :
5460 : 12931 : std::string Chainstate::ToString()
5461 : : {
5462 : 12931 : AssertLockHeld(::cs_main);
5463 [ - + ]: 12931 : CBlockIndex* tip = m_chain.Tip();
5464 : 9720 : return strprintf("Chainstate [%s] @ height %d (%s)",
5465 : 25862 : m_from_snapshot_blockhash ? "snapshot" : "ibd",
5466 [ + - - + : 38681 : tip ? tip->nHeight : -1, tip ? tip->GetBlockHash().ToString() : "null");
+ + + - ]
5467 : : }
5468 : :
5469 : 10320 : bool Chainstate::ResizeCoinsCaches(size_t coinstip_size, size_t coinsdb_size)
5470 : : {
5471 : 10320 : AssertLockHeld(::cs_main);
5472 [ + + ]: 10320 : if (coinstip_size == m_coinstip_cache_size_bytes &&
5473 [ - + ]: 5460 : coinsdb_size == m_coinsdb_cache_size_bytes) {
5474 : : // Cache sizes are unchanged, no need to continue.
5475 : : return true;
5476 : : }
5477 : 4860 : size_t old_coinstip_size = m_coinstip_cache_size_bytes;
5478 : 4860 : m_coinstip_cache_size_bytes = coinstip_size;
5479 : 4860 : m_coinsdb_cache_size_bytes = coinsdb_size;
5480 : 4860 : CoinsDB().ResizeCache(coinsdb_size);
5481 : :
5482 [ + - ]: 4860 : LogInfo("[%s] resized coinsdb cache to %.1f MiB",
5483 : : this->ToString(), coinsdb_size / double(1_MiB));
5484 [ + - ]: 4860 : LogInfo("[%s] resized coinstip cache to %.1f MiB",
5485 : : this->ToString(), coinstip_size / double(1_MiB));
5486 : :
5487 [ + + ]: 4860 : BlockValidationState state;
5488 : 4860 : bool ret;
5489 : :
5490 [ + + ]: 4860 : if (coinstip_size > old_coinstip_size) {
5491 : : // Likely no need to flush if cache sizes have grown.
5492 [ + - ]: 2402 : ret = FlushStateToDisk(state, FlushStateMode::IF_NEEDED);
5493 : : } else {
5494 : : // Otherwise, flush state to disk and deallocate the in-memory coins map.
5495 [ + - ]: 2458 : ret = FlushStateToDisk(state, FlushStateMode::FORCE_FLUSH);
5496 : : }
5497 : 4860 : return ret;
5498 : 4860 : }
5499 : :
5500 : 652764 : double ChainstateManager::GuessVerificationProgress(const CBlockIndex* pindex) const
5501 : : {
5502 : 652764 : AssertLockHeld(GetMutex());
5503 [ + - ]: 652764 : const ChainTxData& data{GetParams().TxData()};
5504 [ + - ]: 652764 : if (pindex == nullptr) {
5505 : : return 0.0;
5506 : : }
5507 : :
5508 [ - + ]: 652764 : if (pindex->m_chain_tx_count == 0) {
5509 [ # # ]: 0 : LogDebug(BCLog::VALIDATION, "Block %d has unset m_chain_tx_count. Unable to estimate verification progress.\n", pindex->nHeight);
5510 : 0 : return 0.0;
5511 : : }
5512 : :
5513 : 652764 : const int64_t nNow{TicksSinceEpoch<std::chrono::seconds>(NodeClock::now())};
5514 : 652764 : const auto block_time{
5515 [ - + + + ]: 1305528 : (Assume(m_best_header) && std::abs(nNow - pindex->GetBlockTime()) <= Ticks<std::chrono::seconds>(2h) &&
5516 [ + - - + : 1137179 : Assume(m_best_header->nHeight >= pindex->nHeight)) ?
+ - ]
5517 : : // When the header is known to be recent, switch to a height-based
5518 : : // approach. This ensures the returned value is quantized when
5519 : : // close to "1.0", because some users expect it to be. This also
5520 : : // avoids relying too much on the exact miner-set timestamp, which
5521 : : // may be off.
5522 : 484415 : nNow - (m_best_header->nHeight - pindex->nHeight) * GetConsensus().nPowTargetSpacing :
5523 : 168349 : pindex->GetBlockTime(),
5524 : 484415 : };
5525 : :
5526 : 652764 : double fTxTotal;
5527 : :
5528 [ + + ]: 652764 : if (pindex->m_chain_tx_count <= data.tx_count) {
5529 : 2 : fTxTotal = data.tx_count + (nNow - data.nTime) * data.dTxRate;
5530 : : } else {
5531 : 652762 : fTxTotal = pindex->m_chain_tx_count + (nNow - block_time) * data.dTxRate;
5532 : : }
5533 : :
5534 [ + - ]: 652764 : return std::min<double>(pindex->m_chain_tx_count / fTxTotal, 1.0);
5535 : : }
5536 : :
5537 : 0 : double ChainstateManager::GetBackgroundVerificationProgress(const CBlockIndex& pindex) const
5538 : : {
5539 : 0 : AssertLockHeld(GetMutex());
5540 [ # # ]: 0 : Assert(HistoricalChainstate());
5541 : 0 : auto target_block = HistoricalChainstate()->TargetBlock();
5542 : :
5543 [ # # # # ]: 0 : if (pindex.m_chain_tx_count == 0 || target_block->m_chain_tx_count == 0) {
5544 [ # # ]: 0 : LogDebug(BCLog::VALIDATION, "[background validation] Block %d has unset m_chain_tx_count. Unable to estimate verification progress.", pindex.nHeight);
5545 : 0 : return 0.0;
5546 : : }
5547 : 0 : return static_cast<double>(pindex.m_chain_tx_count) / static_cast<double>(target_block->m_chain_tx_count);
5548 : : }
5549 : :
5550 : 3211 : Chainstate& ChainstateManager::InitializeChainstate(CTxMemPool* mempool)
5551 : : {
5552 : 3211 : AssertLockHeld(::cs_main);
5553 [ - + ]: 3211 : assert(m_chainstates.empty());
5554 [ + - ]: 3211 : m_chainstates.emplace_back(std::make_unique<Chainstate>(mempool, m_blockman, *this));
5555 : 3211 : return *m_chainstates.back();
5556 : : }
5557 : :
5558 : 0 : [[nodiscard]] static bool DeleteCoinsDBFromDisk(const fs::path db_path, bool is_snapshot)
5559 : : EXCLUSIVE_LOCKS_REQUIRED(::cs_main)
5560 : : {
5561 : 0 : AssertLockHeld(::cs_main);
5562 : :
5563 [ # # ]: 0 : if (is_snapshot) {
5564 [ # # ]: 0 : fs::path base_blockhash_path = db_path / node::SNAPSHOT_BLOCKHASH_FILENAME;
5565 : :
5566 : 0 : try {
5567 [ # # ]: 0 : bool existed = fs::remove(base_blockhash_path);
5568 [ # # ]: 0 : if (!existed) {
5569 [ # # # # ]: 0 : LogWarning("[snapshot] snapshot chainstate dir being removed lacks %s file",
5570 : : fs::PathToString(node::SNAPSHOT_BLOCKHASH_FILENAME));
5571 : : }
5572 [ - - ]: 0 : } catch (const fs::filesystem_error& e) {
5573 [ - - - - : 0 : LogWarning("[snapshot] failed to remove file %s: %s\n",
- - ]
5574 : : fs::PathToString(base_blockhash_path), e.code().message());
5575 [ - - ]: 0 : }
5576 : 0 : }
5577 : :
5578 [ # # ]: 0 : std::string path_str = fs::PathToString(db_path);
5579 [ # # ]: 0 : LogInfo("Removing leveldb dir at %s\n", path_str);
5580 : :
5581 : : // We have to destruct before this call leveldb::DB in order to release the db
5582 : : // lock, otherwise `DestroyDB` will fail. See `leveldb::~DBImpl()`.
5583 [ # # ]: 0 : const bool destroyed = DestroyDB(path_str);
5584 : :
5585 [ # # ]: 0 : if (!destroyed) {
5586 [ # # ]: 0 : LogError("leveldb DestroyDB call failed on %s", path_str);
5587 : : }
5588 : :
5589 : : // Datadir should be removed from filesystem; otherwise initialization may detect
5590 : : // it on subsequent statups and get confused.
5591 : : //
5592 : : // If the base_blockhash_path removal above fails in the case of snapshot
5593 : : // chainstates, this will return false since leveldb won't remove a non-empty
5594 : : // directory.
5595 [ # # # # ]: 0 : return destroyed && !fs::exists(db_path);
5596 : 0 : }
5597 : :
5598 : 2696 : util::Result<CBlockIndex*> ChainstateManager::ActivateSnapshot(
5599 : : AutoFile& coins_file,
5600 : : const SnapshotMetadata& metadata,
5601 : : bool in_memory)
5602 : : {
5603 : 2696 : uint256 base_blockhash = metadata.m_base_blockhash;
5604 : :
5605 : 2696 : CBlockIndex* snapshot_start_block{};
5606 : :
5607 : 2696 : {
5608 : 2696 : LOCK(::cs_main);
5609 : :
5610 [ + + ]: 2696 : if (this->CurrentChainstate().m_from_snapshot_blockhash) {
5611 [ + - + - ]: 168 : return util::Error{Untranslated("Can't activate a snapshot-based chainstate more than once")};
5612 : : }
5613 [ + + ]: 2640 : if (!GetParams().AssumeutxoForBlockhash(base_blockhash).has_value()) {
5614 [ + - ]: 224 : auto available_heights = GetParams().GetAvailableSnapshotHeights();
5615 [ + - + - ]: 896 : std::string heights_formatted = util::Join(available_heights, ", ", [&](const auto& i) { return util::ToString(i); });
5616 [ + - + - ]: 448 : return util::Error{Untranslated(strprintf("assumeutxo block hash in snapshot metadata not recognized (hash: %s). The following snapshot heights are available: %s",
5617 [ + - ]: 448 : base_blockhash.ToString(),
5618 : 224 : heights_formatted))};
5619 : 224 : }
5620 : :
5621 [ + - ]: 2416 : snapshot_start_block = m_blockman.LookupBlockIndex(base_blockhash);
5622 [ + + ]: 2416 : if (!snapshot_start_block) {
5623 [ + - + - ]: 28 : return util::Error{Untranslated(strprintf("The base block header (%s) must appear in the headers chain. Make sure all headers are syncing, and call loadtxoutset again",
5624 [ + - ]: 42 : base_blockhash.ToString()))};
5625 : : }
5626 : :
5627 : 2402 : bool start_block_invalid = snapshot_start_block->nStatus & BLOCK_FAILED_VALID;
5628 [ - + ]: 2402 : if (start_block_invalid) {
5629 [ # # # # : 0 : return util::Error{Untranslated(strprintf("The base block header (%s) is part of an invalid chain", base_blockhash.ToString()))};
# # ]
5630 : : }
5631 : :
5632 [ + - + - : 2402 : if (!m_best_header || m_best_header->GetAncestor(snapshot_start_block->nHeight) != snapshot_start_block) {
- + ]
5633 [ # # # # ]: 0 : return util::Error{Untranslated("A forked headers-chain with more work than the chain with the snapshot base block header exists. Please proceed to sync without AssumeUtxo.")};
5634 : : }
5635 : :
5636 [ + - ]: 2402 : auto mempool{CurrentChainstate().GetMempool()};
5637 [ + - + - : 2402 : if (mempool && mempool->size() > 0) {
+ - ]
5638 [ # # # # ]: 0 : return util::Error{Untranslated("Can't activate a snapshot when mempool not empty")};
5639 : : }
5640 : 294 : }
5641 : :
5642 : 2402 : int64_t current_coinsdb_cache_size{0};
5643 : 2402 : int64_t current_coinstip_cache_size{0};
5644 : :
5645 : : // Cache percentages to allocate to each chainstate.
5646 : : //
5647 : : // These particular percentages don't matter so much since they will only be
5648 : : // relevant during snapshot activation; caches are rebalanced at the conclusion of
5649 : : // this function. We want to give (essentially) all available cache capacity to the
5650 : : // snapshot to aid the bulk load later in this function.
5651 : 2402 : static constexpr double IBD_CACHE_PERC = 0.01;
5652 : 2402 : static constexpr double SNAPSHOT_CACHE_PERC = 0.99;
5653 : :
5654 : 2402 : {
5655 : 2402 : LOCK(::cs_main);
5656 : : // Resize the coins caches to ensure we're not exceeding memory limits.
5657 : : //
5658 : : // Allocate the majority of the cache to the incoming snapshot chainstate, since
5659 : : // (optimistically) getting to its tip will be the top priority. We'll need to call
5660 : : // `MaybeRebalanceCaches()` once we're done with this function to ensure
5661 : : // the right allocation (including the possibility that no snapshot was activated
5662 : : // and that we should restore the active chainstate caches to their original size).
5663 : : //
5664 [ + - ]: 2402 : current_coinsdb_cache_size = this->ActiveChainstate().m_coinsdb_cache_size_bytes;
5665 [ + - ]: 2402 : current_coinstip_cache_size = this->ActiveChainstate().m_coinstip_cache_size_bytes;
5666 : :
5667 : : // Temporarily resize the active coins cache to make room for the newly-created
5668 : : // snapshot chain.
5669 [ + - ]: 2402 : this->ActiveChainstate().ResizeCoinsCaches(
5670 : 2402 : static_cast<size_t>(current_coinstip_cache_size * IBD_CACHE_PERC),
5671 [ + - ]: 2402 : static_cast<size_t>(current_coinsdb_cache_size * IBD_CACHE_PERC));
5672 : 0 : }
5673 : :
5674 [ + - ]: 7206 : auto snapshot_chainstate = WITH_LOCK(::cs_main,
5675 : : return std::make_unique<Chainstate>(
5676 : : /*mempool=*/nullptr, m_blockman, *this, base_blockhash));
5677 : :
5678 : 2402 : {
5679 [ + - ]: 2402 : LOCK(::cs_main);
5680 [ + - ]: 2402 : snapshot_chainstate->InitCoinsDB(
5681 [ + - ]: 2402 : static_cast<size_t>(current_coinsdb_cache_size * SNAPSHOT_CACHE_PERC),
5682 : : in_memory, /*should_wipe=*/false);
5683 [ + - ]: 2402 : snapshot_chainstate->InitCoinsCache(
5684 [ + - ]: 2402 : static_cast<size_t>(current_coinstip_cache_size * SNAPSHOT_CACHE_PERC));
5685 : 0 : }
5686 : :
5687 : 4748 : auto cleanup_bad_snapshot = [&](bilingual_str reason) EXCLUSIVE_LOCKS_REQUIRED(::cs_main) {
5688 : 2346 : this->MaybeRebalanceCaches();
5689 : :
5690 : : // PopulateAndValidateSnapshot can return (in error) before the leveldb datadir
5691 : : // has been created, so only attempt removal if we got that far.
5692 [ - + ]: 2346 : if (auto snapshot_datadir = node::FindAssumeutxoChainstateDir(m_options.datadir)) {
5693 : : // We have to destruct leveldb::DB in order to release the db lock, otherwise
5694 : : // DestroyDB() (in DeleteCoinsDBFromDisk()) will fail. See `leveldb::~DBImpl()`.
5695 : : // Destructing the chainstate (and so resetting the coinsviews object) does this.
5696 [ # # ]: 0 : snapshot_chainstate.reset();
5697 [ # # # # ]: 0 : bool removed = DeleteCoinsDBFromDisk(*snapshot_datadir, /*is_snapshot=*/true);
5698 [ # # ]: 0 : if (!removed) {
5699 [ # # # # ]: 0 : GetNotifications().fatalError(strprintf(_("Failed to remove snapshot chainstate dir (%s). "
5700 [ # # # # ]: 0 : "Manually remove it before restarting.\n"), fs::PathToString(*snapshot_datadir)));
5701 : : }
5702 : 2346 : }
5703 : 2346 : return util::Error{std::move(reason)};
5704 : 2402 : };
5705 : :
5706 [ + - + + ]: 2402 : if (auto res{this->PopulateAndValidateSnapshot(*snapshot_chainstate, coins_file, metadata)}; !res) {
5707 [ + - ]: 2346 : LOCK(::cs_main);
5708 [ + - + - : 11730 : return cleanup_bad_snapshot(Untranslated(strprintf("Population failed: %s", util::ErrorString(res).original)));
+ - + - +
- ]
5709 : 2346 : }
5710 : :
5711 [ + - ]: 56 : LOCK(::cs_main); // cs_main required for rest of snapshot activation.
5712 : :
5713 : : // Do a final check to ensure that the snapshot chainstate is actually a more
5714 : : // work chain than the active chainstate; a user could have loaded a snapshot
5715 : : // very late in the IBD process, and we wouldn't want to load a useless chainstate.
5716 [ - + + - : 112 : if (!CBlockIndexWorkComparator()(ActiveTip(), snapshot_chainstate->m_chain.Tip())) {
+ - - + ]
5717 [ # # # # : 0 : return cleanup_bad_snapshot(Untranslated("work does not exceed active chainstate"));
# # ]
5718 : : }
5719 : : // If not in-memory, persist the base blockhash for use during subsequent
5720 : : // initialization.
5721 [ - + ]: 56 : if (!in_memory) {
5722 [ # # # # ]: 0 : if (!node::WriteSnapshotBaseBlockhash(*snapshot_chainstate)) {
5723 [ # # # # : 0 : return cleanup_bad_snapshot(Untranslated("could not write base blockhash"));
# # ]
5724 : : }
5725 : : }
5726 : :
5727 [ + - ]: 56 : Chainstate& chainstate{AddChainstate(std::move(snapshot_chainstate))};
5728 [ + - - + : 56 : m_blockman.m_snapshot_height = Assert(chainstate.SnapshotBase())->nHeight;
+ - ]
5729 : :
5730 [ + - ]: 56 : chainstate.PopulateBlockIndexCandidates();
5731 : :
5732 [ + - + - ]: 56 : LogInfo("[snapshot] successfully activated snapshot %s", base_blockhash.ToString());
5733 [ + - + - : 56 : LogInfo("[snapshot] (%.2f MB)",
+ - ]
5734 : : chainstate.CoinsTip().DynamicMemoryUsage() / (1000 * 1000));
5735 : :
5736 [ + - ]: 56 : this->MaybeRebalanceCaches();
5737 : 56 : return snapshot_start_block;
5738 : 2402 : }
5739 : :
5740 : 1354 : static void FlushSnapshotToDisk(CCoinsViewCache& coins_cache, bool snapshot_loaded)
5741 : : {
5742 [ - + + - : 2708 : LOG_TIME_MILLIS_WITH_CATEGORY_MSG_ONCE(
+ - ]
5743 : : strprintf("%s (%.2f MB)",
5744 : : snapshot_loaded ? "saving snapshot chainstate" : "flushing coins cache",
5745 : : coins_cache.DynamicMemoryUsage() / (1000 * 1000)),
5746 : : BCLog::LogFlags::ALL);
5747 : :
5748 [ + - ]: 1354 : coins_cache.Flush();
5749 : 1354 : }
5750 : :
5751 : 0 : struct StopHashingException : public std::exception
5752 : : {
5753 : 0 : const char* what() const noexcept override
5754 : : {
5755 : 0 : return "ComputeUTXOStats interrupted.";
5756 : : }
5757 : : };
5758 : :
5759 : 61560 : static void SnapshotUTXOHashBreakpoint(const util::SignalInterrupt& interrupt)
5760 : : {
5761 [ - + ]: 61560 : if (interrupt) throw StopHashingException();
5762 : 61560 : }
5763 : :
5764 : 2402 : util::Result<void> ChainstateManager::PopulateAndValidateSnapshot(
5765 : : Chainstate& snapshot_chainstate,
5766 : : AutoFile& coins_file,
5767 : : const SnapshotMetadata& metadata)
5768 : : {
5769 : : // It's okay to release cs_main before we're done using `coins_cache` because we know
5770 : : // that nothing else will be referencing the newly created snapshot_chainstate yet.
5771 [ + - + - ]: 7206 : CCoinsViewCache& coins_cache = *WITH_LOCK(::cs_main, return &snapshot_chainstate.CoinsTip());
5772 : :
5773 : 2402 : uint256 base_blockhash = metadata.m_base_blockhash;
5774 : :
5775 [ + - + - ]: 7206 : CBlockIndex* snapshot_start_block = WITH_LOCK(::cs_main, return m_blockman.LookupBlockIndex(base_blockhash));
5776 : :
5777 [ - + ]: 2402 : if (!snapshot_start_block) {
5778 : : // Needed for ComputeUTXOStats to determine the
5779 : : // height and to avoid a crash when base_blockhash.IsNull()
5780 [ # # # # ]: 0 : return util::Error{Untranslated(strprintf("Did not find snapshot start blockheader %s",
5781 : 0 : base_blockhash.ToString()))};
5782 : : }
5783 : :
5784 : 2402 : int base_height = snapshot_start_block->nHeight;
5785 : 2402 : const auto& maybe_au_data = GetParams().AssumeutxoForHeight(base_height);
5786 : :
5787 [ - + ]: 2402 : if (!maybe_au_data) {
5788 [ # # ]: 0 : return util::Error{Untranslated(strprintf("Assumeutxo height in snapshot metadata not recognized "
5789 : 0 : "(%d) - refusing to load snapshot", base_height))};
5790 : : }
5791 : :
5792 : 2402 : const AssumeutxoData& au_data = *maybe_au_data;
5793 : :
5794 : : // This work comparison is a duplicate check with the one performed later in
5795 : : // ActivateSnapshot(), but is done so that we avoid doing the long work of staging
5796 : : // a snapshot that isn't actually usable.
5797 [ - + + - : 7206 : if (WITH_LOCK(::cs_main, return !CBlockIndexWorkComparator()(ActiveTip(), snapshot_start_block))) {
+ - + - ]
5798 [ # # ]: 0 : return util::Error{Untranslated("Work does not exceed active chainstate")};
5799 : : }
5800 : :
5801 : 2402 : const uint64_t coins_count = metadata.m_coins_count;
5802 : 2402 : uint64_t coins_left = metadata.m_coins_count;
5803 : :
5804 [ + - ]: 2402 : LogInfo("[snapshot] loading %d coins from snapshot %s", coins_left, base_blockhash.ToString());
5805 : 2402 : int64_t coins_processed{0};
5806 : :
5807 [ + + ]: 84522 : while (coins_left > 0) {
5808 : 83064 : try {
5809 [ + + ]: 83064 : Txid txid;
5810 [ + + ]: 83064 : coins_file >> txid;
5811 : 83012 : size_t coins_per_txid{0};
5812 [ + + ]: 83012 : coins_per_txid = ReadCompactSize(coins_file);
5813 : :
5814 [ + + ]: 82966 : if (coins_per_txid > coins_left) {
5815 [ + - + - ]: 258 : return util::Error{Untranslated("Mismatch in coins count in snapshot metadata and actual snapshot data")};
5816 : : }
5817 : :
5818 [ + + ]: 931532 : for (size_t i = 0; i < coins_per_txid; i++) {
5819 : 849412 : COutPoint outpoint;
5820 : 849412 : Coin coin;
5821 [ + + ]: 849412 : outpoint.n = static_cast<uint32_t>(ReadCompactSize(coins_file));
5822 : 849300 : outpoint.hash = txid;
5823 [ + + ]: 849300 : coins_file >> coin;
5824 [ + + ]: 848888 : if (coin.nHeight > base_height ||
5825 [ - + ]: 848706 : outpoint.n >= std::numeric_limits<decltype(outpoint.n)>::max() // Avoid integer wrap-around in coinstats.cpp:ApplyHash
5826 : : ) {
5827 [ + - ]: 364 : return util::Error{Untranslated(strprintf("Bad snapshot data after deserializing %d coins",
5828 [ + - ]: 364 : coins_count - coins_left))};
5829 : : }
5830 [ + + ]: 848706 : if (!MoneyRange(coin.out.nValue)) {
5831 [ + - ]: 108 : return util::Error{Untranslated(strprintf("Bad snapshot data after deserializing %d coins - bad tx out value",
5832 [ + - ]: 108 : coins_count - coins_left))};
5833 : : }
5834 [ + - ]: 848652 : coins_cache.EmplaceCoinInternalDANGER(std::move(outpoint), std::move(coin));
5835 : :
5836 : 848652 : --coins_left;
5837 : 848652 : ++coins_processed;
5838 : :
5839 [ - + ]: 848652 : if (coins_processed % 1000000 == 0) {
5840 [ # # # # ]: 0 : LogInfo("[snapshot] %d coins loaded (%.2f%%, %.2f MB)",
5841 : : coins_processed,
5842 : : static_cast<float>(coins_processed) * 100 / static_cast<float>(coins_count),
5843 : : coins_cache.DynamicMemoryUsage() / (1000 * 1000));
5844 : : }
5845 : :
5846 : : // Batch write and flush (if we need to) every so often.
5847 : : //
5848 : : // If our average Coin size is roughly 41 bytes, checking every 120,000 coins
5849 : : // means <5MB of memory imprecision.
5850 [ - + ]: 848652 : if (coins_processed % 120000 == 0) {
5851 [ # # # # ]: 0 : if (m_interrupt) {
5852 [ # # # # ]: 0 : return util::Error{Untranslated("Aborting after an interrupt was requested")};
5853 : : }
5854 : :
5855 [ # # # # : 0 : const auto snapshot_cache_state = WITH_LOCK(::cs_main,
# # ]
5856 : : return snapshot_chainstate.GetCoinsCacheSizeState());
5857 : :
5858 [ # # ]: 0 : if (snapshot_cache_state >= CoinsCacheSizeState::CRITICAL) {
5859 : : // This is a hack - we don't know what the actual best block is, but that
5860 : : // doesn't matter for the purposes of flushing the cache here. We'll set this
5861 : : // to its correct value (`base_blockhash`) below after the coins are loaded.
5862 [ # # ]: 0 : coins_cache.SetBestBlock(GetRandHash());
5863 : :
5864 : : // No need to acquire cs_main since this chainstate isn't being used yet.
5865 [ # # ]: 0 : FlushSnapshotToDisk(coins_cache, /*snapshot_loaded=*/false);
5866 : : }
5867 : : }
5868 : 849412 : }
5869 [ - + ]: 622 : } catch (const std::ios_base::failure&) {
5870 [ + - + - ]: 1244 : return util::Error{Untranslated(strprintf("Bad snapshot format or truncated snapshot after deserializing %d coins",
5871 : 622 : coins_processed))};
5872 : 622 : }
5873 : : }
5874 : :
5875 : : // Important that we set this. This and the coins_cache accesses above are
5876 : : // sort of a layer violation, but either we reach into the innards of
5877 : : // CCoinsViewCache here or we have to invert some of the Chainstate to
5878 : : // embed them in a snapshot-activation-specific CCoinsViewCache bulk load
5879 : : // method.
5880 : 1458 : coins_cache.SetBestBlock(base_blockhash);
5881 : :
5882 : 1458 : bool out_of_coins{false};
5883 : 1458 : try {
5884 : 1458 : std::byte left_over_byte;
5885 [ + + ]: 1458 : coins_file >> left_over_byte;
5886 [ - + ]: 1354 : } catch (const std::ios_base::failure&) {
5887 : : // We expect an exception since we should be out of coins.
5888 : 1354 : out_of_coins = true;
5889 : 1354 : }
5890 : 1458 : if (!out_of_coins) {
5891 [ + - ]: 208 : return util::Error{Untranslated(strprintf("Bad snapshot - coins left over after deserializing %d coins",
5892 : 104 : coins_count))};
5893 : : }
5894 : :
5895 [ + - + - ]: 1354 : LogInfo("[snapshot] loaded %d (%.2f MB) coins from snapshot %s",
5896 : : coins_count,
5897 : : coins_cache.DynamicMemoryUsage() / (1000 * 1000),
5898 : : base_blockhash.ToString());
5899 : :
5900 : : // No need to acquire cs_main since this chainstate isn't being used yet.
5901 : 1354 : FlushSnapshotToDisk(coins_cache, /*snapshot_loaded=*/true);
5902 : :
5903 [ - + ]: 1354 : assert(coins_cache.GetBestBlock() == base_blockhash);
5904 : :
5905 : : // As above, okay to immediately release cs_main here since no other context knows
5906 : : // about the snapshot_chainstate.
5907 [ + - + - ]: 4062 : CCoinsViewDB* snapshot_coinsdb = WITH_LOCK(::cs_main, return &snapshot_chainstate.CoinsDB());
5908 : :
5909 : 1354 : std::optional<CCoinsStats> maybe_stats;
5910 : :
5911 : 1354 : try {
5912 : 1354 : maybe_stats = ComputeUTXOStats(
5913 [ + - ]: 62914 : CoinStatsHashType::HASH_SERIALIZED, snapshot_coinsdb, m_blockman, [&interrupt = m_interrupt] { SnapshotUTXOHashBreakpoint(interrupt); });
5914 [ - - ]: 0 : } catch (StopHashingException const&) {
5915 [ - - - - ]: 0 : return util::Error{Untranslated("Aborting after an interrupt was requested")};
5916 : 0 : }
5917 [ - + ]: 1354 : if (!maybe_stats.has_value()) {
5918 [ - - ]: 0 : return util::Error{Untranslated("Failed to generate coins stats")};
5919 : : }
5920 : :
5921 : : // Assert that the deserialized chainstate contents match the expected assumeutxo value.
5922 [ + + ]: 1354 : if (AssumeutxoHash{maybe_stats->hashSerialized} != au_data.hash_serialized) {
5923 [ + - ]: 3894 : return util::Error{Untranslated(strprintf("Bad snapshot content hash: expected %s, got %s",
5924 [ + - + - ]: 3894 : au_data.hash_serialized.ToString(), maybe_stats->hashSerialized.ToString()))};
5925 : : }
5926 : :
5927 : 56 : snapshot_chainstate.m_chain.SetTip(*snapshot_start_block);
5928 : :
5929 : : // The remainder of this function requires modifying data protected by cs_main.
5930 : 56 : LOCK(::cs_main);
5931 : :
5932 : : // Fake various pieces of CBlockIndex state:
5933 : 56 : CBlockIndex* index = nullptr;
5934 : :
5935 : : // Don't make any modifications to the genesis block since it shouldn't be
5936 : : // necessary, and since the genesis block doesn't have normal flags like
5937 : : // BLOCK_VALID_SCRIPTS set.
5938 : 56 : constexpr int AFTER_GENESIS_START{1};
5939 : :
5940 [ - + + + ]: 11256 : for (int i = AFTER_GENESIS_START; i <= snapshot_chainstate.m_chain.Height(); ++i) {
5941 [ + - ]: 11200 : index = snapshot_chainstate.m_chain[i];
5942 : :
5943 : : // Fake BLOCK_OPT_WITNESS so that Chainstate::NeedsRedownload()
5944 : : // won't ask for -reindex on startup.
5945 [ + - ]: 11200 : if (DeploymentActiveAt(*index, *this, Consensus::DEPLOYMENT_SEGWIT)) {
5946 : 11200 : index->nStatus |= BLOCK_OPT_WITNESS;
5947 : : }
5948 : :
5949 [ + - ]: 11200 : m_blockman.m_dirty_blockindex.insert(index);
5950 : : // Changes to the block index will be flushed to disk after this call
5951 : : // returns in `ActivateSnapshot()`, when `MaybeRebalanceCaches()` is
5952 : : // called, since we've added a snapshot chainstate and therefore will
5953 : : // have to downsize the IBD chainstate, which will result in a call to
5954 : : // `FlushStateToDisk(FORCE_FLUSH)`.
5955 : : }
5956 : :
5957 [ - + ]: 56 : assert(index);
5958 [ - + ]: 56 : assert(index == snapshot_start_block);
5959 : 56 : index->m_chain_tx_count = au_data.m_chain_tx_count;
5960 : :
5961 [ + - + - ]: 56 : LogInfo("[snapshot] validated snapshot (%.2f MB)",
5962 : : coins_cache.DynamicMemoryUsage() / (1000 * 1000));
5963 [ + - ]: 56 : return {};
5964 : 56 : }
5965 : :
5966 : : // Currently, this function holds cs_main for its duration, which could be for
5967 : : // multiple minutes due to the ComputeUTXOStats call. Holding cs_main used to be
5968 : : // necessary (before d43a1f1a2fa3) to avoid advancing validated_cs farther than
5969 : : // its target block. Now it should be possible to avoid this, but simply
5970 : : // releasing cs_main here would not be possible because this function is invoked
5971 : : // by ConnectTip within ActivateBestChain.
5972 : : //
5973 : : // Eventually (TODO) it would be better to call this function outside of
5974 : : // ActivateBestChain, on a separate thread that should not require cs_main to
5975 : : // hash, because the UTXO set is only hashed after the historical chainstate
5976 : : // reaches its target block and is no longer changing.
5977 : 326380 : SnapshotCompletionResult ChainstateManager::MaybeValidateSnapshot(Chainstate& validated_cs, Chainstate& unvalidated_cs)
5978 : : {
5979 : 326380 : AssertLockHeld(cs_main);
5980 : :
5981 : : // If the snapshot does not need to be validated...
5982 [ # # ]: 0 : if (unvalidated_cs.m_assumeutxo != Assumeutxo::UNVALIDATED ||
5983 : : // Or if either chainstate is unusable...
5984 [ # # ]: 0 : !unvalidated_cs.m_from_snapshot_blockhash ||
5985 [ # # ]: 0 : validated_cs.m_assumeutxo != Assumeutxo::VALIDATED ||
5986 [ # # # # : 0 : !validated_cs.m_chain.Tip() ||
# # ]
5987 : : // Or the validated chainstate is not targeting the snapshot block...
5988 [ # # # # ]: 0 : !validated_cs.m_target_blockhash ||
5989 [ - + - - : 326380 : *validated_cs.m_target_blockhash != *unvalidated_cs.m_from_snapshot_blockhash ||
- - ]
5990 : : // Or the validated chainstate has not reached the snapshot block yet...
5991 : 0 : !validated_cs.ReachedTarget()) {
5992 : : // Then the snapshot cannot be validated and there is nothing to do.
5993 : 326380 : return SnapshotCompletionResult::SKIPPED;
5994 : : }
5995 [ # # # # ]: 0 : assert(validated_cs.TargetBlock() == validated_cs.m_chain.Tip());
5996 : :
5997 : 0 : auto handle_invalid_snapshot = [&]() EXCLUSIVE_LOCKS_REQUIRED(::cs_main) {
5998 : 0 : bilingual_str user_error = strprintf(_(
5999 : : "%s failed to validate the -assumeutxo snapshot state. "
6000 : : "This indicates a hardware problem, or a bug in the software, or a "
6001 : : "bad software modification that allowed an invalid snapshot to be "
6002 : : "loaded. As a result of this, the node will shut down and stop using any "
6003 : : "state that was built on the snapshot, resetting the chain height "
6004 : : "from %d to %d. On the next "
6005 : : "restart, the node will resume syncing from %d "
6006 : : "without using any snapshot data. "
6007 : : "Please report this incident to %s, including how you obtained the snapshot. "
6008 : : "The invalid snapshot chainstate will be left on disk in case it is "
6009 : : "helpful in diagnosing the issue that caused this error."),
6010 : 0 : CLIENT_NAME, unvalidated_cs.m_chain.Height(),
6011 : 0 : validated_cs.m_chain.Height(),
6012 [ # # # # ]: 0 : validated_cs.m_chain.Height(), CLIENT_BUGREPORT);
6013 : :
6014 [ # # ]: 0 : LogError("[snapshot] !!! %s\n", user_error.original);
6015 [ # # ]: 0 : LogError("[snapshot] deleting snapshot, reverting to validated chain, and stopping node\n");
6016 : :
6017 : : // Reset chainstate target to network tip instead of snapshot block.
6018 [ # # ]: 0 : validated_cs.SetTargetBlock(nullptr);
6019 : :
6020 : 0 : unvalidated_cs.m_assumeutxo = Assumeutxo::INVALID;
6021 : :
6022 [ # # ]: 0 : auto rename_result = unvalidated_cs.InvalidateCoinsDBOnDisk();
6023 [ # # ]: 0 : if (!rename_result) {
6024 [ # # # # : 0 : user_error += Untranslated("\n") + util::ErrorString(rename_result);
# # # # ]
6025 : : }
6026 : :
6027 [ # # ]: 0 : GetNotifications().fatalError(user_error);
6028 : 0 : };
6029 : :
6030 : 0 : CCoinsViewDB& validated_coins_db = validated_cs.CoinsDB();
6031 : 0 : validated_cs.ForceFlushStateToDisk();
6032 : :
6033 [ # # ]: 0 : const auto& maybe_au_data = m_options.chainparams.AssumeutxoForHeight(validated_cs.m_chain.Height());
6034 [ # # ]: 0 : if (!maybe_au_data) {
6035 : 0 : LogWarning("[snapshot] assumeutxo data not found for height "
6036 : : "(%d) - refusing to validate snapshot", validated_cs.m_chain.Height());
6037 : 0 : handle_invalid_snapshot();
6038 : 0 : return SnapshotCompletionResult::MISSING_CHAINPARAMS;
6039 : : }
6040 : :
6041 : 0 : const AssumeutxoData& au_data = *maybe_au_data;
6042 : 0 : std::optional<CCoinsStats> validated_cs_stats;
6043 : 0 : LogInfo("[snapshot] computing UTXO stats for background chainstate to validate "
6044 : : "snapshot - this could take a few minutes");
6045 : 0 : try {
6046 : 0 : validated_cs_stats = ComputeUTXOStats(
6047 : : CoinStatsHashType::HASH_SERIALIZED,
6048 : : &validated_coins_db,
6049 [ # # ]: 0 : m_blockman,
6050 [ # # ]: 0 : [&interrupt = m_interrupt] { SnapshotUTXOHashBreakpoint(interrupt); });
6051 [ - - ]: 0 : } catch (StopHashingException const&) {
6052 : 0 : return SnapshotCompletionResult::STATS_FAILED;
6053 : 0 : }
6054 : :
6055 : : // XXX note that this function is slow and will hold cs_main for potentially minutes.
6056 [ # # ]: 0 : if (!validated_cs_stats) {
6057 : 0 : LogWarning("[snapshot] failed to generate stats for validation coins db");
6058 : : // While this isn't a problem with the snapshot per se, this condition
6059 : : // prevents us from validating the snapshot, so we should shut down and let the
6060 : : // user handle the issue manually.
6061 : 0 : handle_invalid_snapshot();
6062 : 0 : return SnapshotCompletionResult::STATS_FAILED;
6063 : : }
6064 : :
6065 : : // Compare the validated chainstate's UTXO set hash against the hard-coded
6066 : : // assumeutxo hash we expect.
6067 : : //
6068 : : // TODO: For belt-and-suspenders, we could cache the UTXO set
6069 : : // hash for the snapshot when it's loaded in its chainstate's leveldb. We could then
6070 : : // reference that here for an additional check.
6071 [ # # ]: 0 : if (AssumeutxoHash{validated_cs_stats->hashSerialized} != au_data.hash_serialized) {
6072 [ # # # # ]: 0 : LogWarning("[snapshot] hash mismatch: actual=%s, expected=%s",
6073 : : validated_cs_stats->hashSerialized.ToString(),
6074 : : au_data.hash_serialized.ToString());
6075 : 0 : handle_invalid_snapshot();
6076 : 0 : return SnapshotCompletionResult::HASH_MISMATCH;
6077 : : }
6078 : :
6079 [ # # ]: 0 : LogInfo("[snapshot] snapshot beginning at %s has been fully validated",
6080 : : unvalidated_cs.m_from_snapshot_blockhash->ToString());
6081 : :
6082 : 0 : unvalidated_cs.m_assumeutxo = Assumeutxo::VALIDATED;
6083 [ # # ]: 0 : validated_cs.m_target_utxohash = AssumeutxoHash{validated_cs_stats->hashSerialized};
6084 : 0 : this->MaybeRebalanceCaches();
6085 : :
6086 : 0 : return SnapshotCompletionResult::SUCCESS;
6087 : : }
6088 : :
6089 : 7093029 : Chainstate& ChainstateManager::ActiveChainstate() const
6090 : : {
6091 : 7093029 : LOCK(::cs_main);
6092 [ + - ]: 7093029 : return CurrentChainstate();
6093 : 7093029 : }
6094 : :
6095 : 7862 : void ChainstateManager::MaybeRebalanceCaches()
6096 : : {
6097 : 7862 : AssertLockHeld(::cs_main);
6098 : 7862 : Chainstate& current_cs{CurrentChainstate()};
6099 : 7862 : Chainstate* historical_cs{HistoricalChainstate()};
6100 [ + + + - ]: 7862 : if (!historical_cs && !current_cs.m_from_snapshot_blockhash) {
6101 : : // Allocate everything to the IBD chainstate. This will always happen
6102 : : // when we are not using a snapshot.
6103 : 7806 : current_cs.ResizeCoinsCaches(m_total_coinstip_cache, m_total_coinsdb_cache);
6104 [ - + ]: 56 : } else if (!historical_cs) {
6105 : : // If background validation has completed and snapshot is our active chain...
6106 : 0 : LogInfo("[snapshot] allocating all cache to the snapshot chainstate");
6107 : : // Allocate everything to the snapshot chainstate.
6108 : 0 : current_cs.ResizeCoinsCaches(m_total_coinstip_cache, m_total_coinsdb_cache);
6109 : : } else {
6110 : : // If both chainstates exist, determine who needs more cache based on IBD status.
6111 : : //
6112 : : // Note: shrink caches first so that we don't inadvertently overwhelm available memory.
6113 [ + + ]: 56 : if (IsInitialBlockDownload()) {
6114 : 52 : historical_cs->ResizeCoinsCaches(
6115 : 52 : m_total_coinstip_cache * 0.05, m_total_coinsdb_cache * 0.05);
6116 : 52 : current_cs.ResizeCoinsCaches(
6117 : 52 : m_total_coinstip_cache * 0.95, m_total_coinsdb_cache * 0.95);
6118 : : } else {
6119 : 4 : current_cs.ResizeCoinsCaches(
6120 : 4 : m_total_coinstip_cache * 0.05, m_total_coinsdb_cache * 0.05);
6121 : 4 : historical_cs->ResizeCoinsCaches(
6122 : 4 : m_total_coinstip_cache * 0.95, m_total_coinsdb_cache * 0.95);
6123 : : }
6124 : : }
6125 : 7862 : }
6126 : :
6127 : 0 : void ChainstateManager::ResetChainstates()
6128 : : {
6129 : 0 : m_chainstates.clear();
6130 : 0 : }
6131 : :
6132 : : /**
6133 : : * Apply default chain params to nullopt members.
6134 : : * This helps to avoid coding errors around the accidental use of the compare
6135 : : * operators that accept nullopt, thus ignoring the intended default value.
6136 : : */
6137 : 3211 : static ChainstateManager::Options&& Flatten(ChainstateManager::Options&& opts)
6138 : : {
6139 [ - + ]: 3211 : if (!opts.check_block_index.has_value()) opts.check_block_index = opts.chainparams.DefaultConsistencyChecks();
6140 [ + - - + ]: 3211 : if (!opts.minimum_chain_work.has_value()) opts.minimum_chain_work = UintToArith256(opts.chainparams.GetConsensus().nMinimumChainWork);
6141 [ + - ]: 3211 : if (!opts.assumed_valid_block.has_value()) opts.assumed_valid_block = opts.chainparams.GetConsensus().defaultAssumeValid;
6142 : 3211 : return std::move(opts);
6143 : : }
6144 : :
6145 : 3211 : ChainstateManager::ChainstateManager(const util::SignalInterrupt& interrupt, Options options, node::BlockManager::Options blockman_options)
6146 : 3211 : : m_script_check_queue{/*batch_size=*/128, std::clamp(options.worker_threads_num, 0, MAX_SCRIPTCHECK_THREADS)},
6147 : 3211 : m_interrupt{interrupt},
6148 [ + - ]: 3211 : m_options{Flatten(std::move(options))},
6149 [ + - + - ]: 3211 : m_blockman{interrupt, std::move(blockman_options)},
6150 [ + - + - : 9633 : m_validation_cache{m_options.script_execution_cache_bytes, m_options.signature_cache_bytes}
+ - ]
6151 : : {
6152 : 3211 : }
6153 : :
6154 : 3211 : ChainstateManager::~ChainstateManager()
6155 : : {
6156 : 3211 : LOCK(::cs_main);
6157 : :
6158 [ + - ]: 3211 : m_versionbitscache.Clear();
6159 : 12844 : }
6160 : :
6161 : 3211 : Chainstate* ChainstateManager::LoadAssumeutxoChainstate()
6162 : : {
6163 [ - + ]: 3211 : assert(!CurrentChainstate().m_from_snapshot_blockhash);
6164 : 3211 : std::optional<fs::path> path = node::FindAssumeutxoChainstateDir(m_options.datadir);
6165 [ - + ]: 3211 : if (!path) {
6166 : : return nullptr;
6167 : : }
6168 [ # # # # ]: 0 : std::optional<uint256> base_blockhash = node::ReadSnapshotBaseBlockhash(*path);
6169 [ # # ]: 0 : if (!base_blockhash) {
6170 : : return nullptr;
6171 : : }
6172 [ # # # # ]: 0 : LogInfo("[snapshot] detected active snapshot chainstate (%s) - loading",
6173 : : fs::PathToString(*path));
6174 : :
6175 [ # # ]: 0 : auto snapshot_chainstate{std::make_unique<Chainstate>(nullptr, m_blockman, *this, base_blockhash)};
6176 [ # # # # ]: 0 : LogInfo("[snapshot] switching active chainstate to %s", snapshot_chainstate->ToString());
6177 [ # # ]: 0 : return &this->AddChainstate(std::move(snapshot_chainstate));
6178 : 3211 : }
6179 : :
6180 : 56 : Chainstate& ChainstateManager::AddChainstate(std::unique_ptr<Chainstate> chainstate)
6181 : : {
6182 : 56 : Chainstate& prev_chainstate{CurrentChainstate()};
6183 [ - + ]: 56 : assert(prev_chainstate.m_assumeutxo == Assumeutxo::VALIDATED);
6184 : : // Set target block for historical chainstate to snapshot block.
6185 [ - + ]: 56 : assert(!prev_chainstate.m_target_blockhash);
6186 : 56 : prev_chainstate.m_target_blockhash = chainstate->m_from_snapshot_blockhash;
6187 : 56 : m_chainstates.push_back(std::move(chainstate));
6188 : 56 : Chainstate& curr_chainstate{CurrentChainstate()};
6189 [ - + ]: 56 : assert(&curr_chainstate == m_chainstates.back().get());
6190 : :
6191 : : // Transfer possession of the mempool to the chainstate.
6192 : : // Mempool is empty at this point because we're still in IBD.
6193 [ + - - + ]: 56 : assert(!prev_chainstate.m_mempool || prev_chainstate.m_mempool->size() == 0);
6194 [ - + ]: 56 : assert(!curr_chainstate.m_mempool);
6195 : 56 : std::swap(curr_chainstate.m_mempool, prev_chainstate.m_mempool);
6196 : 56 : return curr_chainstate;
6197 : : }
6198 : :
6199 : 694979 : bool IsBIP30Repeat(const CBlockIndex& block_index)
6200 : : {
6201 [ - + - - ]: 694979 : return (block_index.nHeight==91842 && block_index.GetBlockHash() == uint256{"00000000000a4d0a398161ffc163c503763b1f4360639393e0e4c8e300e0caec"}) ||
6202 [ - + - - ]: 694979 : (block_index.nHeight==91880 && block_index.GetBlockHash() == uint256{"00000000000743f190a18c5577a3c2d2a1f610ae9601ac046a38084ccb7cd721"});
6203 : : }
6204 : :
6205 : 0 : bool IsBIP30Unspendable(const uint256& block_hash, int block_height)
6206 : : {
6207 [ # # # # : 0 : return (block_height==91722 && block_hash == uint256{"00000000000271a2dc26e7667f8419f2e15416dc6955e5a6c6cdf3f2574dd08e"}) ||
# # ]
6208 [ # # ]: 0 : (block_height==91812 && block_hash == uint256{"00000000000af0aed4792b1acee3d966af36cf5def14935db8de83d6f9306f2f"});
6209 : : }
6210 : :
6211 : 0 : util::Result<void> Chainstate::InvalidateCoinsDBOnDisk()
6212 : : {
6213 : : // Should never be called on a non-snapshot chainstate.
6214 [ # # ]: 0 : assert(m_from_snapshot_blockhash);
6215 : :
6216 : : // Coins views no longer usable.
6217 [ # # ]: 0 : m_coins_views.reset();
6218 : :
6219 : 0 : const fs::path db_path{StoragePath()};
6220 [ # # # # ]: 0 : const fs::path invalid_path{db_path + "_INVALID"};
6221 [ # # ]: 0 : const std::string db_path_str{fs::PathToString(db_path)};
6222 [ # # ]: 0 : const std::string invalid_path_str{fs::PathToString(invalid_path)};
6223 [ # # ]: 0 : LogInfo("[snapshot] renaming snapshot datadir %s to %s", db_path_str, invalid_path_str);
6224 : :
6225 : : // The invalid storage directory is simply moved and not deleted because we may
6226 : : // want to do forensics later during issue investigation. The user is instructed
6227 : : // accordingly in MaybeValidateSnapshot().
6228 : 0 : try {
6229 [ # # ]: 0 : fs::rename(db_path, invalid_path);
6230 [ - - ]: 0 : } catch (const fs::filesystem_error& e) {
6231 [ - - ]: 0 : LogError("While invalidating the coins db: Error renaming file '%s' -> '%s': %s",
6232 : : db_path_str, invalid_path_str, e.what());
6233 [ - - ]: 0 : return util::Error{strprintf(_(
6234 : : "Rename of '%s' -> '%s' failed. "
6235 : : "You should resolve this by manually moving or deleting the invalid "
6236 : : "snapshot directory %s, otherwise you will encounter the same error again "
6237 : : "on the next startup."),
6238 : 0 : db_path_str, invalid_path_str, db_path_str)};
6239 [ - - ]: 0 : }
6240 : 0 : return {};
6241 : 0 : }
6242 : :
6243 : 0 : bool ChainstateManager::DeleteChainstate(Chainstate& chainstate)
6244 : : {
6245 : 0 : AssertLockHeld(::cs_main);
6246 [ # # ]: 0 : assert(!chainstate.m_coins_views);
6247 : 0 : const fs::path db_path{chainstate.StoragePath()};
6248 [ # # # # : 0 : if (!DeleteCoinsDBFromDisk(db_path, /*is_snapshot=*/bool{chainstate.m_from_snapshot_blockhash})) {
# # ]
6249 [ # # # # ]: 0 : LogError("Deletion of %s failed. Please remove it manually to continue reindexing.",
6250 : : fs::PathToString(db_path));
6251 : 0 : return false;
6252 : : }
6253 [ # # ]: 0 : std::unique_ptr<Chainstate> prev_chainstate{Assert(RemoveChainstate(chainstate))};
6254 : 0 : Chainstate& curr_chainstate{CurrentChainstate()};
6255 [ # # # # ]: 0 : assert(prev_chainstate->m_mempool->size() == 0);
6256 [ # # ]: 0 : assert(!curr_chainstate.m_mempool);
6257 : 0 : std::swap(curr_chainstate.m_mempool, prev_chainstate->m_mempool);
6258 : 0 : return true;
6259 : 0 : }
6260 : :
6261 : 1505371 : ChainstateRole Chainstate::GetRole() const
6262 : : {
6263 : 1505371 : return ChainstateRole{.validated = m_assumeutxo == Assumeutxo::VALIDATED, .historical = bool{m_target_blockhash}};
6264 : : }
6265 : :
6266 : 9483 : void ChainstateManager::RecalculateBestHeader()
6267 : : {
6268 : 9483 : AssertLockHeld(cs_main);
6269 [ - + ]: 9483 : m_best_header = ActiveChain().Tip();
6270 [ + + + + ]: 479954 : for (auto& entry : m_blockman.m_block_index) {
6271 [ + + + + ]: 470471 : if (!(entry.second.nStatus & BLOCK_FAILED_VALID) && m_best_header->nChainWork < entry.second.nChainWork) {
6272 : 617 : m_best_header = &entry.second;
6273 : : }
6274 : : }
6275 : 9483 : }
6276 : :
6277 : 0 : std::optional<int> ChainstateManager::BlocksAheadOfTip() const
6278 : : {
6279 : 0 : LOCK(::cs_main);
6280 : 0 : const CBlockIndex* best_header{m_best_header};
6281 [ # # # # ]: 0 : const CBlockIndex* tip{ActiveChain().Tip()};
6282 : : // Only consider headers that extend the active tip; ignore competing branches.
6283 [ # # # # : 0 : if (best_header && tip && best_header->nChainWork > tip->nChainWork &&
# # # # ]
6284 [ # # ]: 0 : best_header->GetAncestor(tip->nHeight) == tip) {
6285 : 0 : return best_header->nHeight - tip->nHeight;
6286 : : }
6287 : 0 : return std::nullopt;
6288 : 0 : }
6289 : :
6290 : 0 : bool ChainstateManager::ValidatedSnapshotCleanup(Chainstate& validated_cs, Chainstate& unvalidated_cs)
6291 : : {
6292 : 0 : AssertLockHeld(::cs_main);
6293 [ # # ]: 0 : if (unvalidated_cs.m_assumeutxo != Assumeutxo::VALIDATED) {
6294 : : // No need to clean up.
6295 : : return false;
6296 : : }
6297 : :
6298 : 0 : const fs::path validated_path{validated_cs.StoragePath()};
6299 [ # # ]: 0 : const fs::path assumed_valid_path{unvalidated_cs.StoragePath()};
6300 [ # # # # ]: 0 : const fs::path delete_path{validated_path + "_todelete"};
6301 : :
6302 : : // Since we're going to be moving around the underlying leveldb filesystem content
6303 : : // for each chainstate, make sure that the chainstates (and their constituent
6304 : : // CoinsViews members) have been destructed first.
6305 : : //
6306 : : // The caller of this method will be responsible for reinitializing chainstates
6307 : : // if they want to continue operation.
6308 [ # # ]: 0 : this->ResetChainstates();
6309 [ # # # # ]: 0 : assert(this->m_chainstates.size() == 0);
6310 : :
6311 [ # # # # ]: 0 : LogInfo("[snapshot] deleting background chainstate directory (now unnecessary) (%s)",
6312 : : fs::PathToString(validated_path));
6313 : :
6314 : 0 : auto rename_failed_abort = [this](
6315 : : fs::path p_old,
6316 : : fs::path p_new,
6317 : : const fs::filesystem_error& err) {
6318 [ # # # # : 0 : LogError("[snapshot] Error renaming path (%s) -> (%s): %s\n",
# # ]
6319 : : fs::PathToString(p_old), fs::PathToString(p_new), err.what());
6320 [ # # # # ]: 0 : GetNotifications().fatalError(strprintf(_(
6321 : : "Rename of '%s' -> '%s' failed. "
6322 : : "Cannot clean up the background chainstate leveldb directory."),
6323 [ # # # # ]: 0 : fs::PathToString(p_old), fs::PathToString(p_new)));
6324 : 0 : };
6325 : :
6326 : 0 : try {
6327 [ # # ]: 0 : fs::rename(validated_path, delete_path);
6328 [ - - ]: 0 : } catch (const fs::filesystem_error& e) {
6329 [ - - - - : 0 : rename_failed_abort(validated_path, delete_path, e);
- - ]
6330 : 0 : throw;
6331 : 0 : }
6332 : :
6333 [ # # # # : 0 : LogInfo("[snapshot] moving snapshot chainstate (%s) to "
# # ]
6334 : : "default chainstate directory (%s)",
6335 : : fs::PathToString(assumed_valid_path), fs::PathToString(validated_path));
6336 : :
6337 : 0 : try {
6338 [ # # ]: 0 : fs::rename(assumed_valid_path, validated_path);
6339 [ - - ]: 0 : } catch (const fs::filesystem_error& e) {
6340 [ - - - - : 0 : rename_failed_abort(assumed_valid_path, validated_path, e);
- - ]
6341 : 0 : throw;
6342 : 0 : }
6343 : :
6344 [ # # # # : 0 : if (!DeleteCoinsDBFromDisk(delete_path, /*is_snapshot=*/false)) {
# # ]
6345 : : // No need to FatalError because once the unneeded bg chainstate data is
6346 : : // moved, it will not interfere with subsequent initialization.
6347 [ # # # # ]: 0 : LogWarning("Deletion of %s failed. Please remove it manually, as the "
6348 : : "directory is now unnecessary.",
6349 : : fs::PathToString(delete_path));
6350 : : } else {
6351 [ # # # # ]: 0 : LogInfo("[snapshot] deleted background chainstate directory (%s)",
6352 : : fs::PathToString(validated_path));
6353 : : }
6354 : 0 : return true;
6355 : 0 : }
6356 : :
6357 : 0 : std::pair<int, int> Chainstate::GetPruneRange(int last_height_can_prune) const
6358 : : {
6359 [ # # # # ]: 0 : if (m_chain.Height() <= 0) {
6360 : 0 : return {0, 0};
6361 : : }
6362 : 0 : int prune_start{0};
6363 : :
6364 [ # # # # ]: 0 : if (m_from_snapshot_blockhash && m_assumeutxo != Assumeutxo::VALIDATED) {
6365 : : // Only prune blocks _after_ the snapshot if this is a snapshot chain
6366 : : // that has not been fully validated yet. The earlier blocks need to be
6367 : : // kept to validate the snapshot
6368 [ # # ]: 0 : prune_start = Assert(SnapshotBase())->nHeight + 1;
6369 : : }
6370 : :
6371 : 0 : int max_prune = std::max<int>(
6372 [ # # # # ]: 0 : 0, m_chain.Height() - static_cast<int>(MIN_BLOCKS_TO_KEEP));
6373 : :
6374 : : // last block to prune is the lesser of (caller-specified height, MIN_BLOCKS_TO_KEEP from the tip)
6375 : : //
6376 : : // While you might be tempted to prune the background chainstate more
6377 : : // aggressively (i.e. fewer MIN_BLOCKS_TO_KEEP), this won't work with index
6378 : : // building - specifically blockfilterindex requires undo data, and if
6379 : : // we don't maintain this trailing window, we hit indexing failures.
6380 [ # # ]: 0 : int prune_end = std::min(last_height_can_prune, max_prune);
6381 : :
6382 : 0 : return {prune_start, prune_end};
6383 : : }
6384 : :
6385 : 178956 : std::optional<std::pair<const CBlockIndex*, const CBlockIndex*>> ChainstateManager::GetHistoricalBlockRange() const
6386 : : {
6387 : 178956 : const Chainstate* chainstate{HistoricalChainstate()};
6388 [ + - ]: 178956 : if (!chainstate) return {};
6389 [ # # ]: 0 : return std::make_pair(chainstate->m_chain.Tip(), chainstate->TargetBlock());
6390 : : }
6391 : :
6392 : 0 : util::Result<void> ChainstateManager::ActivateBestChains()
6393 : : {
6394 : : // We can't hold cs_main during ActivateBestChain even though we're accessing
6395 : : // the chainman unique_ptrs since ABC requires us not to be holding cs_main, so retrieve
6396 : : // the relevant pointers before the ABC call.
6397 : 0 : AssertLockNotHeld(cs_main);
6398 : 0 : std::vector<Chainstate*> chainstates;
6399 : 0 : {
6400 [ # # ]: 0 : LOCK(GetMutex());
6401 [ # # # # ]: 0 : chainstates.reserve(m_chainstates.size());
6402 [ # # ]: 0 : for (const auto& chainstate : m_chainstates) {
6403 [ # # # # : 0 : if (chainstate && chainstate->m_assumeutxo != Assumeutxo::INVALID && !chainstate->m_target_utxohash) {
# # ]
6404 [ # # ]: 0 : chainstates.push_back(chainstate.get());
6405 : : }
6406 : : }
6407 : 0 : }
6408 [ # # ]: 0 : for (Chainstate* chainstate : chainstates) {
6409 [ # # ]: 0 : BlockValidationState state;
6410 [ # # # # : 0 : if (!chainstate->ActivateBestChain(state, nullptr)) {
# # ]
6411 [ # # ]: 0 : LOCK(GetMutex());
6412 [ # # # # : 0 : return util::Error{Untranslated(strprintf("%s Failed to connect best block (%s)", chainstate->ToString(), state.ToString()))};
# # # # #
# ]
6413 : 0 : }
6414 : 0 : }
6415 : 0 : return {};
6416 : 0 : }
|
