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1 : : // Copyright (c) 2009-2010 Satoshi Nakamoto
2 : : // Copyright (c) 2009-2022 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 <node/miner.h>
7 : :
8 : : #include <chain.h>
9 : : #include <chainparams.h>
10 : : #include <coins.h>
11 : : #include <common/args.h>
12 : : #include <consensus/amount.h>
13 : : #include <consensus/consensus.h>
14 : : #include <consensus/merkle.h>
15 : : #include <consensus/tx_verify.h>
16 : : #include <consensus/validation.h>
17 : : #include <deploymentstatus.h>
18 : : #include <logging.h>
19 : : #include <policy/feerate.h>
20 : : #include <policy/policy.h>
21 : : #include <pow.h>
22 : : #include <primitives/transaction.h>
23 : : #include <util/moneystr.h>
24 : : #include <util/time.h>
25 : : #include <validation.h>
26 : :
27 : : #include <algorithm>
28 : : #include <utility>
29 : :
30 : : namespace node {
31 : 7132 : int64_t UpdateTime(CBlockHeader* pblock, const Consensus::Params& consensusParams, const CBlockIndex* pindexPrev)
32 : : {
33 : 7132 : int64_t nOldTime = pblock->nTime;
34 [ + + ]: 7132 : int64_t nNewTime{std::max<int64_t>(pindexPrev->GetMedianTimePast() + 1, TicksSinceEpoch<std::chrono::seconds>(NodeClock::now()))};
35 : :
36 [ + + ]: 7132 : if (consensusParams.enforce_BIP94) {
37 : : // Height of block to be mined.
38 : 7112 : const int height{pindexPrev->nHeight + 1};
39 [ + + ]: 7112 : if (height % consensusParams.DifficultyAdjustmentInterval() == 0) {
40 [ + - ]: 12 : nNewTime = std::max<int64_t>(nNewTime, pindexPrev->GetBlockTime() - MAX_TIMEWARP);
41 : : }
42 : : }
43 : :
44 [ + + ]: 7132 : if (nOldTime < nNewTime) {
45 : 19 : pblock->nTime = nNewTime;
46 : : }
47 : :
48 : : // Updating time can change work required on testnet:
49 [ + + ]: 7132 : if (consensusParams.fPowAllowMinDifficultyBlocks) {
50 : 7112 : pblock->nBits = GetNextWorkRequired(pindexPrev, pblock, consensusParams);
51 : : }
52 : :
53 : 7132 : return nNewTime - nOldTime;
54 : : }
55 : :
56 : 5988 : void RegenerateCommitments(CBlock& block, ChainstateManager& chainman)
57 : : {
58 : 5988 : CMutableTransaction tx{*block.vtx.at(0)};
59 : 5988 : tx.vout.erase(tx.vout.begin() + GetWitnessCommitmentIndex(block));
60 [ + - + - : 11976 : block.vtx.at(0) = MakeTransactionRef(tx);
- + ]
61 : :
62 [ + - + - : 17964 : const CBlockIndex* prev_block = WITH_LOCK(::cs_main, return chainman.m_blockman.LookupBlockIndex(block.hashPrevBlock));
+ - ]
63 [ + - ]: 5988 : chainman.GenerateCoinbaseCommitment(block, prev_block);
64 : :
65 [ + - ]: 5988 : block.hashMerkleRoot = BlockMerkleRoot(block);
66 : 5988 : }
67 : :
68 : 7132 : static BlockAssembler::Options ClampOptions(BlockAssembler::Options options)
69 : : {
70 : 7132 : Assert(options.coinbase_max_additional_weight <= DEFAULT_BLOCK_MAX_WEIGHT);
71 : 7132 : Assert(options.coinbase_output_max_additional_sigops <= MAX_BLOCK_SIGOPS_COST);
72 : : // Limit weight to between coinbase_max_additional_weight and DEFAULT_BLOCK_MAX_WEIGHT for sanity:
73 : : // Coinbase (reserved) outputs can safely exceed -blockmaxweight, but the rest of the block template will be empty.
74 [ + - ]: 7132 : options.nBlockMaxWeight = std::clamp<size_t>(options.nBlockMaxWeight, options.coinbase_max_additional_weight, DEFAULT_BLOCK_MAX_WEIGHT);
75 : 7132 : return options;
76 : : }
77 : :
78 : 7132 : BlockAssembler::BlockAssembler(Chainstate& chainstate, const CTxMemPool* mempool, const Options& options)
79 : 7132 : : chainparams{chainstate.m_chainman.GetParams()},
80 [ - + ]: 7132 : m_mempool{options.use_mempool ? mempool : nullptr},
81 : 7132 : m_chainstate{chainstate},
82 [ + - - + : 7132 : m_options{ClampOptions(options)}
+ - ]
83 : : {
84 : 7132 : }
85 : :
86 : 0 : void ApplyArgsManOptions(const ArgsManager& args, BlockAssembler::Options& options)
87 : : {
88 : : // Block resource limits
89 [ # # ]: 0 : options.nBlockMaxWeight = args.GetIntArg("-blockmaxweight", options.nBlockMaxWeight);
90 [ # # # # ]: 0 : if (const auto blockmintxfee{args.GetArg("-blockmintxfee")}) {
91 [ # # # # ]: 0 : if (const auto parsed{ParseMoney(*blockmintxfee)}) options.blockMinFeeRate = CFeeRate{*parsed};
92 : 0 : }
93 [ # # ]: 0 : options.print_modified_fee = args.GetBoolArg("-printpriority", options.print_modified_fee);
94 : 0 : }
95 : :
96 : 7132 : void BlockAssembler::resetBlock()
97 : : {
98 : 7132 : inBlock.clear();
99 : :
100 : : // Reserve space for coinbase tx
101 : 7132 : nBlockWeight = m_options.coinbase_max_additional_weight;
102 : 7132 : nBlockSigOpsCost = m_options.coinbase_output_max_additional_sigops;
103 : :
104 : : // These counters do not include coinbase tx
105 : 7132 : nBlockTx = 0;
106 : 7132 : nFees = 0;
107 : 7132 : }
108 : :
109 : 7132 : std::unique_ptr<CBlockTemplate> BlockAssembler::CreateNewBlock(const CScript& scriptPubKeyIn)
110 : : {
111 : 7132 : const auto time_start{SteadyClock::now()};
112 : :
113 : 7132 : resetBlock();
114 : :
115 [ - + ]: 7132 : pblocktemplate.reset(new CBlockTemplate());
116 : :
117 [ - + ]: 7132 : if (!pblocktemplate.get()) {
118 : 0 : return nullptr;
119 : : }
120 : 7132 : CBlock* const pblock = &pblocktemplate->block; // pointer for convenience
121 : :
122 : : // Add dummy coinbase tx as first transaction
123 : 7132 : pblock->vtx.emplace_back();
124 : 7132 : pblocktemplate->vTxFees.push_back(-1); // updated at end
125 : 7132 : pblocktemplate->vTxSigOpsCost.push_back(-1); // updated at end
126 : :
127 : 7132 : LOCK(::cs_main);
128 [ + - ]: 7132 : CBlockIndex* pindexPrev = m_chainstate.m_chain.Tip();
129 [ - + ]: 7132 : assert(pindexPrev != nullptr);
130 : 7132 : nHeight = pindexPrev->nHeight + 1;
131 : :
132 [ + - ]: 7132 : pblock->nVersion = m_chainstate.m_chainman.m_versionbitscache.ComputeBlockVersion(pindexPrev, chainparams.GetConsensus());
133 : : // -regtest only: allow overriding block.nVersion with
134 : : // -blockversion=N to test forking scenarios
135 [ + + ]: 7132 : if (chainparams.MineBlocksOnDemand()) {
136 [ + - + - ]: 7112 : pblock->nVersion = gArgs.GetIntArg("-blockversion", pblock->nVersion);
137 : : }
138 : :
139 : 7132 : pblock->nTime = TicksSinceEpoch<std::chrono::seconds>(NodeClock::now());
140 : 7132 : m_lock_time_cutoff = pindexPrev->GetMedianTimePast();
141 : :
142 : 7132 : int nPackagesSelected = 0;
143 : 7132 : int nDescendantsUpdated = 0;
144 [ + + ]: 7132 : if (m_mempool) {
145 [ + - ]: 1142 : LOCK(m_mempool->cs);
146 [ + - ]: 1142 : addPackageTxs(*m_mempool, nPackagesSelected, nDescendantsUpdated);
147 : 1142 : }
148 : :
149 : 7132 : const auto time_1{SteadyClock::now()};
150 : :
151 [ + + ]: 7132 : m_last_block_num_txs = nBlockTx;
152 [ + + ]: 7132 : m_last_block_weight = nBlockWeight;
153 : :
154 : : // Create coinbase transaction.
155 [ + - ]: 7132 : CMutableTransaction coinbaseTx;
156 [ + - ]: 7132 : coinbaseTx.vin.resize(1);
157 : 7132 : coinbaseTx.vin[0].prevout.SetNull();
158 [ + - ]: 7132 : coinbaseTx.vout.resize(1);
159 : 7132 : coinbaseTx.vout[0].scriptPubKey = scriptPubKeyIn;
160 [ + - + - ]: 7132 : coinbaseTx.vout[0].nValue = nFees + GetBlockSubsidy(nHeight, chainparams.GetConsensus());
161 [ + - + - ]: 7132 : coinbaseTx.vin[0].scriptSig = CScript() << nHeight << OP_0;
162 [ + - - + ]: 14264 : pblock->vtx[0] = MakeTransactionRef(std::move(coinbaseTx));
163 [ + - ]: 7132 : pblocktemplate->vchCoinbaseCommitment = m_chainstate.m_chainman.GenerateCoinbaseCommitment(*pblock, pindexPrev);
164 : 7132 : pblocktemplate->vTxFees[0] = -nFees;
165 : :
166 [ + - ]: 7132 : LogPrintf("CreateNewBlock(): block weight: %u txs: %u fees: %ld sigops %d\n", GetBlockWeight(*pblock), nBlockTx, nFees, nBlockSigOpsCost);
167 : :
168 : : // Fill in header
169 : 7132 : pblock->hashPrevBlock = pindexPrev->GetBlockHash();
170 [ + - ]: 7132 : UpdateTime(pblock, chainparams.GetConsensus(), pindexPrev);
171 [ + - ]: 7132 : pblock->nBits = GetNextWorkRequired(pindexPrev, pblock, chainparams.GetConsensus());
172 : 7132 : pblock->nNonce = 0;
173 [ + - + - ]: 7132 : pblocktemplate->vTxSigOpsCost[0] = WITNESS_SCALE_FACTOR * GetLegacySigOpCount(*pblock->vtx[0]);
174 : :
175 [ + - ]: 7132 : BlockValidationState state;
176 [ + - + - : 7132 : if (m_options.test_block_validity && !TestBlockValidity(state, chainparams, m_chainstate, *pblock, pindexPrev,
+ + ]
177 : : /*fCheckPOW=*/false, /*fCheckMerkleRoot=*/false)) {
178 [ + - + - : 10 : throw std::runtime_error(strprintf("%s: TestBlockValidity failed: %s", __func__, state.ToString()));
+ - ]
179 : : }
180 : 7127 : const auto time_2{SteadyClock::now()};
181 : :
182 [ + - + - : 7127 : LogPrint(BCLog::BENCH, "CreateNewBlock() packages: %.2fms (%d packages, %d updated descendants), validity: %.2fms (total %.2fms)\n",
+ - ]
183 : : Ticks<MillisecondsDouble>(time_1 - time_start), nPackagesSelected, nDescendantsUpdated,
184 : : Ticks<MillisecondsDouble>(time_2 - time_1),
185 : : Ticks<MillisecondsDouble>(time_2 - time_start));
186 : :
187 : 7127 : return std::move(pblocktemplate);
188 [ + - ]: 21391 : }
189 : :
190 : 49 : void BlockAssembler::onlyUnconfirmed(CTxMemPool::setEntries& testSet)
191 : : {
192 [ + + ]: 7601 : for (CTxMemPool::setEntries::iterator iit = testSet.begin(); iit != testSet.end(); ) {
193 : : // Only test txs not already in the block
194 [ + - + - : 22656 : if (inBlock.count((*iit)->GetSharedTx()->GetHash())) {
+ - + + ]
195 : 5456 : testSet.erase(iit++);
196 : : } else {
197 : 2096 : iit++;
198 : : }
199 : : }
200 : 49 : }
201 : :
202 : 118 : bool BlockAssembler::TestPackage(uint64_t packageSize, int64_t packageSigOpsCost) const
203 : : {
204 : : // TODO: switch to weight-based accounting for packages instead of vsize-based accounting.
205 [ + + ]: 118 : if (nBlockWeight + WITNESS_SCALE_FACTOR * packageSize >= m_options.nBlockMaxWeight) {
206 : : return false;
207 : : }
208 [ + + ]: 63 : if (nBlockSigOpsCost + packageSigOpsCost >= MAX_BLOCK_SIGOPS_COST) {
209 : 14 : return false;
210 : : }
211 : : return true;
212 : : }
213 : :
214 : : // Perform transaction-level checks before adding to block:
215 : : // - transaction finality (locktime)
216 : 49 : bool BlockAssembler::TestPackageTransactions(const CTxMemPool::setEntries& package) const
217 : : {
218 [ + + ]: 2192 : for (CTxMemPool::txiter it : package) {
219 [ + + ]: 2145 : if (!IsFinalTx(it->GetTx(), nHeight, m_lock_time_cutoff)) {
220 : : return false;
221 : : }
222 : : }
223 : : return true;
224 : : }
225 : :
226 : 2143 : void BlockAssembler::AddToBlock(CTxMemPool::txiter iter)
227 : : {
228 [ + - + - ]: 4286 : pblocktemplate->block.vtx.emplace_back(iter->GetSharedTx());
229 : 2143 : pblocktemplate->vTxFees.push_back(iter->GetFee());
230 : 2143 : pblocktemplate->vTxSigOpsCost.push_back(iter->GetSigOpCost());
231 [ + - ]: 2143 : nBlockWeight += iter->GetTxWeight();
232 : 2143 : ++nBlockTx;
233 [ + - ]: 2143 : nBlockSigOpsCost += iter->GetSigOpCost();
234 : 2143 : nFees += iter->GetFee();
235 [ + - + - : 4286 : inBlock.insert(iter->GetSharedTx()->GetHash());
+ - ]
236 : :
237 [ - + ]: 2143 : if (m_options.print_modified_fee) {
238 [ # # # # : 0 : LogPrintf("fee rate %s txid %s\n",
# # # # ]
239 : : CFeeRate(iter->GetModifiedFee(), iter->GetTxSize()).ToString(),
240 : : iter->GetTx().GetHash().ToString());
241 : : }
242 : 2143 : }
243 : :
244 : : /** Add descendants of given transactions to mapModifiedTx with ancestor
245 : : * state updated assuming given transactions are inBlock. Returns number
246 : : * of updated descendants. */
247 : 47 : static int UpdatePackagesForAdded(const CTxMemPool& mempool,
248 : : const CTxMemPool::setEntries& alreadyAdded,
249 : : indexed_modified_transaction_set& mapModifiedTx) EXCLUSIVE_LOCKS_REQUIRED(mempool.cs)
250 : : {
251 : 47 : AssertLockHeld(mempool.cs);
252 : :
253 : 47 : int nDescendantsUpdated = 0;
254 [ + + ]: 2190 : for (CTxMemPool::txiter it : alreadyAdded) {
255 [ + - ]: 2143 : CTxMemPool::setEntries descendants;
256 [ + - ]: 2143 : mempool.CalculateDescendants(it, descendants);
257 : : // Insert all descendants (not yet in block) into the modified set
258 [ + + ]: 1013172 : for (CTxMemPool::txiter desc : descendants) {
259 [ + + ]: 1011029 : if (alreadyAdded.count(desc)) {
260 : 763568 : continue;
261 : : }
262 : 247461 : ++nDescendantsUpdated;
263 : 247461 : modtxiter mit = mapModifiedTx.find(desc);
264 [ + + ]: 247461 : if (mit == mapModifiedTx.end()) {
265 [ + - ]: 949 : CTxMemPoolModifiedEntry modEntry(desc);
266 [ + - ]: 949 : mit = mapModifiedTx.insert(modEntry).first;
267 : : }
268 [ + - ]: 1258490 : mapModifiedTx.modify(mit, update_for_parent_inclusion(it));
269 : : }
270 : 2143 : }
271 : 47 : return nDescendantsUpdated;
272 : : }
273 : :
274 : 47 : void BlockAssembler::SortForBlock(const CTxMemPool::setEntries& package, std::vector<CTxMemPool::txiter>& sortedEntries)
275 : : {
276 : : // Sort package by ancestor count
277 : : // If a transaction A depends on transaction B, then A's ancestor count
278 : : // must be greater than B's. So this is sufficient to validly order the
279 : : // transactions for block inclusion.
280 [ - + ]: 47 : sortedEntries.clear();
281 : 47 : sortedEntries.insert(sortedEntries.begin(), package.begin(), package.end());
282 : 47 : std::sort(sortedEntries.begin(), sortedEntries.end(), CompareTxIterByAncestorCount());
283 : 47 : }
284 : :
285 : : // This transaction selection algorithm orders the mempool based
286 : : // on feerate of a transaction including all unconfirmed ancestors.
287 : : // Since we don't remove transactions from the mempool as we select them
288 : : // for block inclusion, we need an alternate method of updating the feerate
289 : : // of a transaction with its not-yet-selected ancestors as we go.
290 : : // This is accomplished by walking the in-mempool descendants of selected
291 : : // transactions and storing a temporary modified state in mapModifiedTxs.
292 : : // Each time through the loop, we compare the best transaction in
293 : : // mapModifiedTxs with the next transaction in the mempool to decide what
294 : : // transaction package to work on next.
295 : 1142 : void BlockAssembler::addPackageTxs(const CTxMemPool& mempool, int& nPackagesSelected, int& nDescendantsUpdated)
296 : : {
297 : 1142 : AssertLockHeld(mempool.cs);
298 : :
299 : : // mapModifiedTx will store sorted packages after they are modified
300 : : // because some of their txs are already in the block
301 : 1142 : indexed_modified_transaction_set mapModifiedTx;
302 : : // Keep track of entries that failed inclusion, to avoid duplicate work
303 : 1142 : std::set<Txid> failedTx;
304 : :
305 : 1142 : CTxMemPool::indexed_transaction_set::index<ancestor_score>::type::iterator mi = mempool.mapTx.get<ancestor_score>().begin();
306 : 1142 : CTxMemPool::txiter iter;
307 : :
308 : : // Limit the number of attempts to add transactions to the block when it is
309 : : // close to full; this is just a simple heuristic to finish quickly if the
310 : : // mempool has a lot of entries.
311 : 1142 : const int64_t MAX_CONSECUTIVE_FAILURES = 1000;
312 : 1142 : int64_t nConsecutiveFailed = 0;
313 : :
314 [ + + + + ]: 3403 : while (mi != mempool.mapTx.get<ancestor_score>().end() || !mapModifiedTx.empty()) {
315 : : // First try to find a new transaction in mapTx to evaluate.
316 : : //
317 : : // Skip entries in mapTx that are already in a block or are present
318 : : // in mapModifiedTx (which implies that the mapTx ancestor state is
319 : : // stale due to ancestor inclusion in the block)
320 : : // Also skip transactions that we've already failed to add. This can happen if
321 : : // we consider a transaction in mapModifiedTx and it fails: we can then
322 : : // potentially consider it again while walking mapTx. It's currently
323 : : // guaranteed to fail again, but as a belt-and-suspenders check we put it in
324 : : // failedTx and avoid re-evaluation, since the re-evaluation would be using
325 : : // cached size/sigops/fee values that are not actually correct.
326 : : /** Return true if given transaction from mapTx has already been evaluated,
327 : : * or if the transaction's cached data in mapTx is incorrect. */
328 [ + + ]: 2264 : if (mi != mempool.mapTx.get<ancestor_score>().end()) {
329 [ - + ]: 2181 : auto it = mempool.mapTx.project<0>(mi);
330 [ - + ]: 2181 : assert(it != mempool.mapTx.end());
331 [ + + + - : 4801 : if (mapModifiedTx.count(it) || inBlock.count(it->GetSharedTx()->GetHash()) || failedTx.count(it->GetSharedTx()->GetHash())) {
+ - + + +
- + - + +
+ + ]
332 : 2143 : ++mi;
333 : 2143 : continue;
334 : : }
335 : : }
336 : :
337 : : // Now that mi is not stale, determine which transaction to evaluate:
338 : : // the next entry from mapTx, or the best from mapModifiedTx?
339 : 121 : bool fUsingModified = false;
340 : :
341 : 121 : modtxscoreiter modit = mapModifiedTx.get<ancestor_score>().begin();
342 [ + + ]: 121 : if (mi == mempool.mapTx.get<ancestor_score>().end()) {
343 : : // We're out of entries in mapTx; use the entry from mapModifiedTx
344 : 83 : iter = modit->iter;
345 : 83 : fUsingModified = true;
346 : : } else {
347 : : // Try to compare the mapTx entry to the mapModifiedTx entry
348 [ + + ]: 38 : iter = mempool.mapTx.project<0>(mi);
349 [ + + + + ]: 48 : if (modit != mapModifiedTx.get<ancestor_score>().end() &&
350 [ + - ]: 10 : CompareTxMemPoolEntryByAncestorFee()(*modit, CTxMemPoolModifiedEntry(iter))) {
351 : : // The best entry in mapModifiedTx has higher score
352 : : // than the one from mapTx.
353 : : // Switch which transaction (package) to consider
354 : 3 : iter = modit->iter;
355 : 3 : fUsingModified = true;
356 : : } else {
357 : : // Either no entry in mapModifiedTx, or it's worse than mapTx.
358 : : // Increment mi for the next loop iteration.
359 : 35 : ++mi;
360 : : }
361 : : }
362 : :
363 : : // We skip mapTx entries that are inBlock, and mapModifiedTx shouldn't
364 : : // contain anything that is inBlock.
365 [ + - + - : 242 : assert(!inBlock.count(iter->GetSharedTx()->GetHash()));
- + ]
366 : :
367 [ + + ]: 121 : uint64_t packageSize = iter->GetSizeWithAncestors();
368 [ + + ]: 121 : CAmount packageFees = iter->GetModFeesWithAncestors();
369 [ + + ]: 121 : int64_t packageSigOpsCost = iter->GetSigOpCostWithAncestors();
370 [ + + ]: 121 : if (fUsingModified) {
371 : 86 : packageSize = modit->nSizeWithAncestors;
372 : 86 : packageFees = modit->nModFeesWithAncestors;
373 : 86 : packageSigOpsCost = modit->nSigOpCostWithAncestors;
374 : : }
375 : :
376 [ + - + + ]: 121 : if (packageFees < m_options.blockMinFeeRate.GetFee(packageSize)) {
377 : : // Everything else we might consider has a lower fee rate
378 : 3 : return;
379 : : }
380 : :
381 [ + + ]: 118 : if (!TestPackage(packageSize, packageSigOpsCost)) {
382 [ + + ]: 69 : if (fUsingModified) {
383 : : // Since we always look at the best entry in mapModifiedTx,
384 : : // we must erase failed entries so that we can consider the
385 : : // next best entry on the next loop iteration
386 : 66 : mapModifiedTx.get<ancestor_score>().erase(modit);
387 [ + - + - ]: 198 : failedTx.insert(iter->GetSharedTx()->GetHash());
388 : : }
389 : :
390 : 69 : ++nConsecutiveFailed;
391 : :
392 [ - + ]: 69 : if (nConsecutiveFailed > MAX_CONSECUTIVE_FAILURES && nBlockWeight >
393 [ # # ]: 0 : m_options.nBlockMaxWeight - m_options.coinbase_max_additional_weight) {
394 : : // Give up if we're close to full and haven't succeeded in a while
395 : : break;
396 : : }
397 : 69 : continue;
398 : : }
399 : :
400 [ + - ]: 49 : auto ancestors{mempool.AssumeCalculateMemPoolAncestors(__func__, *iter, CTxMemPool::Limits::NoLimits(), /*fSearchForParents=*/false)};
401 : :
402 [ + - ]: 49 : onlyUnconfirmed(ancestors);
403 [ + - ]: 49 : ancestors.insert(iter);
404 : :
405 : : // Test if all tx's are Final
406 [ + - + + ]: 49 : if (!TestPackageTransactions(ancestors)) {
407 [ - + ]: 2 : if (fUsingModified) {
408 : 0 : mapModifiedTx.get<ancestor_score>().erase(modit);
409 [ # # # # ]: 0 : failedTx.insert(iter->GetSharedTx()->GetHash());
410 : : }
411 : 2 : continue;
412 : : }
413 : :
414 : : // This transaction will make it in; reset the failed counter.
415 : 47 : nConsecutiveFailed = 0;
416 : :
417 : : // Package can be added. Sort the entries in a valid order.
418 : 47 : std::vector<CTxMemPool::txiter> sortedEntries;
419 [ + - ]: 47 : SortForBlock(ancestors, sortedEntries);
420 : :
421 [ + + ]: 2190 : for (size_t i = 0; i < sortedEntries.size(); ++i) {
422 [ + - ]: 2143 : AddToBlock(sortedEntries[i]);
423 : : // Erase from the modified set, if present
424 : 2143 : mapModifiedTx.erase(sortedEntries[i]);
425 : : }
426 : :
427 : 47 : ++nPackagesSelected;
428 : :
429 : : // Update transactions that depend on each of these
430 [ + - ]: 47 : nDescendantsUpdated += UpdatePackagesForAdded(mempool, ancestors, mapModifiedTx);
431 : 49 : }
432 : 1142 : }
433 : : } // namespace node
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