Branch data Line data Source code
1 : : // Copyright (c) 2019-2022 The Bitcoin Core developers
2 : : // Distributed under the MIT software license, see the accompanying
3 : : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 : :
5 : : #include <test/util/mining.h>
6 : :
7 : : #include <chainparams.h>
8 : : #include <consensus/merkle.h>
9 : : #include <consensus/validation.h>
10 : : #include <key_io.h>
11 : : #include <node/context.h>
12 : : #include <pow.h>
13 : : #include <primitives/transaction.h>
14 : : #include <test/util/script.h>
15 : : #include <util/check.h>
16 : : #include <validation.h>
17 : : #include <validationinterface.h>
18 : : #include <versionbits.h>
19 : :
20 : : #include <algorithm>
21 : : #include <memory>
22 : :
23 : : using node::BlockAssembler;
24 : : using node::NodeContext;
25 : :
26 : 0 : COutPoint generatetoaddress(const NodeContext& node, const std::string& address)
27 : : {
28 : 0 : const auto dest = DecodeDestination(address);
29 [ # # # # ]: 0 : assert(IsValidDestination(dest));
30 [ # # ]: 0 : BlockAssembler::Options assembler_options;
31 [ # # ]: 0 : assembler_options.coinbase_output_script = GetScriptForDestination(dest);
32 : :
33 [ # # ]: 0 : return MineBlock(node, assembler_options);
34 : 0 : }
35 : :
36 : 0 : std::vector<std::shared_ptr<CBlock>> CreateBlockChain(size_t total_height, const CChainParams& params)
37 : : {
38 : 0 : std::vector<std::shared_ptr<CBlock>> ret{total_height};
39 : 0 : auto time{params.GenesisBlock().nTime};
40 : : // NOTE: here `height` does not correspond to the block height but the block height - 1.
41 [ # # ]: 0 : for (size_t height{0}; height < total_height; ++height) {
42 [ # # # # ]: 0 : CBlock& block{*(ret.at(height) = std::make_shared<CBlock>())};
43 : :
44 [ # # ]: 0 : CMutableTransaction coinbase_tx;
45 : 0 : coinbase_tx.nLockTime = static_cast<uint32_t>(height);
46 [ # # ]: 0 : coinbase_tx.vin.resize(1);
47 : 0 : coinbase_tx.vin[0].prevout.SetNull();
48 [ # # ]: 0 : coinbase_tx.vin[0].nSequence = CTxIn::MAX_SEQUENCE_NONFINAL; // Make sure timelock is enforced.
49 [ # # ]: 0 : coinbase_tx.vout.resize(1);
50 : 0 : coinbase_tx.vout[0].scriptPubKey = P2WSH_OP_TRUE;
51 [ # # # # ]: 0 : coinbase_tx.vout[0].nValue = GetBlockSubsidy(height + 1, params.GetConsensus());
52 [ # # # # ]: 0 : coinbase_tx.vin[0].scriptSig = CScript() << (height + 1) << OP_0;
53 [ # # # # : 0 : block.vtx = {MakeTransactionRef(std::move(coinbase_tx))};
# # # # ]
54 : :
55 : 0 : block.nVersion = VERSIONBITS_LAST_OLD_BLOCK_VERSION;
56 [ # # # # : 0 : block.hashPrevBlock = (height >= 1 ? *ret.at(height - 1) : params.GenesisBlock()).GetHash();
# # ]
57 [ # # ]: 0 : block.hashMerkleRoot = BlockMerkleRoot(block);
58 : 0 : block.nTime = ++time;
59 : 0 : block.nBits = params.GenesisBlock().nBits;
60 : 0 : block.nNonce = 0;
61 : :
62 [ # # # # : 0 : while (!CheckProofOfWork(block.GetHash(), block.nBits, params.GetConsensus())) {
# # ]
63 : 0 : ++block.nNonce;
64 [ # # ]: 0 : assert(block.nNonce);
65 : : }
66 : 0 : }
67 : 0 : return ret;
68 [ # # # # ]: 0 : }
69 : :
70 : 0 : COutPoint MineBlock(const NodeContext& node, const node::BlockAssembler::Options& assembler_options)
71 : : {
72 : 0 : auto block = PrepareBlock(node, assembler_options);
73 [ # # ]: 0 : auto valid = MineBlock(node, block);
74 [ # # ]: 0 : assert(!valid.IsNull());
75 [ # # ]: 0 : return valid;
76 : 0 : }
77 : :
78 : : struct BlockValidationStateCatcher : public CValidationInterface {
79 : : const uint256 m_hash;
80 : : std::optional<BlockValidationState> m_state;
81 : :
82 : 0 : BlockValidationStateCatcher(const uint256& hash)
83 : 0 : : m_hash{hash},
84 : 0 : m_state{} {}
85 : :
86 : : protected:
87 : 0 : void BlockChecked(const std::shared_ptr<const CBlock>& block, const BlockValidationState& state) override
88 : : {
89 [ # # ]: 0 : if (block->GetHash() != m_hash) return;
90 : 0 : m_state = state;
91 : : }
92 : : };
93 : :
94 : 0 : COutPoint MineBlock(const NodeContext& node, std::shared_ptr<CBlock>& block)
95 : : {
96 [ # # ]: 0 : while (!CheckProofOfWork(block->GetHash(), block->nBits, Params().GetConsensus())) {
97 [ # # ]: 0 : ++block->nNonce;
98 [ # # ]: 0 : assert(block->nNonce);
99 : : }
100 : :
101 : 0 : return ProcessBlock(node, block);
102 : : }
103 : :
104 : 0 : COutPoint ProcessBlock(const NodeContext& node, const std::shared_ptr<CBlock>& block)
105 : : {
106 : 0 : auto& chainman{*Assert(node.chainman)};
107 [ # # # # ]: 0 : const auto old_height = WITH_LOCK(chainman.GetMutex(), return chainman.ActiveHeight());
108 : 0 : bool new_block;
109 [ # # ]: 0 : BlockValidationStateCatcher bvsc{block->GetHash()};
110 [ # # ]: 0 : node.validation_signals->RegisterValidationInterface(&bvsc);
111 [ # # # # : 0 : const bool processed{chainman.ProcessNewBlock(block, true, true, &new_block)};
# # ]
112 [ # # # # ]: 0 : const bool duplicate{!new_block && processed};
113 : 0 : assert(!duplicate);
114 [ # # ]: 0 : node.validation_signals->UnregisterValidationInterface(&bvsc);
115 [ # # ]: 0 : node.validation_signals->SyncWithValidationInterfaceQueue();
116 [ # # # # ]: 0 : const bool was_valid{bvsc.m_state && bvsc.m_state->IsValid()};
117 [ # # # # : 0 : assert(old_height + was_valid == WITH_LOCK(chainman.GetMutex(), return chainman.ActiveHeight()));
# # # # ]
118 : :
119 [ # # ]: 0 : if (was_valid) return {block->vtx[0]->GetHash(), 0};
120 : 0 : return {};
121 : 0 : }
122 : :
123 : 0 : std::shared_ptr<CBlock> PrepareBlock(const NodeContext& node,
124 : : const BlockAssembler::Options& assembler_options)
125 : : {
126 : 0 : auto block = std::make_shared<CBlock>(
127 : 0 : BlockAssembler{Assert(node.chainman)->ActiveChainstate(), Assert(node.mempool.get()), assembler_options}
128 [ # # ]: 0 : .CreateNewBlock()
129 [ # # ]: 0 : ->block);
130 : :
131 [ # # ]: 0 : LOCK(cs_main);
132 [ # # # # : 0 : block->nTime = Assert(node.chainman)->ActiveChain().Tip()->GetMedianTimePast() + 1;
# # # # ]
133 [ # # ]: 0 : block->hashMerkleRoot = BlockMerkleRoot(*block);
134 : :
135 [ # # ]: 0 : return block;
136 : 0 : }
137 : 0 : std::shared_ptr<CBlock> PrepareBlock(const NodeContext& node, const CScript& coinbase_scriptPubKey)
138 : : {
139 : 0 : BlockAssembler::Options assembler_options;
140 : 0 : assembler_options.coinbase_output_script = coinbase_scriptPubKey;
141 [ # # ]: 0 : ApplyArgsManOptions(*node.args, assembler_options);
142 [ # # ]: 0 : return PrepareBlock(node, assembler_options);
143 : 0 : }
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