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 : :
22 : : using node::BlockAssembler;
23 : : using node::NodeContext;
24 : :
25 : 0 : COutPoint generatetoaddress(const NodeContext& node, const std::string& address)
26 : : {
27 : 0 : const auto dest = DecodeDestination(address);
28 [ # # # # ]: 0 : assert(IsValidDestination(dest));
29 [ # # ]: 0 : BlockAssembler::Options assembler_options;
30 [ # # ]: 0 : assembler_options.coinbase_output_script = GetScriptForDestination(dest);
31 : :
32 [ # # ]: 0 : return MineBlock(node, assembler_options);
33 : 0 : }
34 : :
35 : 0 : std::vector<std::shared_ptr<CBlock>> CreateBlockChain(size_t total_height, const CChainParams& params)
36 : : {
37 : 0 : std::vector<std::shared_ptr<CBlock>> ret{total_height};
38 : 0 : auto time{params.GenesisBlock().nTime};
39 : : // NOTE: here `height` does not correspond to the block height but the block height - 1.
40 [ # # ]: 0 : for (size_t height{0}; height < total_height; ++height) {
41 [ # # # # ]: 0 : CBlock& block{*(ret.at(height) = std::make_shared<CBlock>())};
42 : :
43 [ # # ]: 0 : CMutableTransaction coinbase_tx;
44 : 0 : coinbase_tx.nLockTime = static_cast<uint32_t>(height);
45 [ # # ]: 0 : coinbase_tx.vin.resize(1);
46 : 0 : coinbase_tx.vin[0].prevout.SetNull();
47 [ # # ]: 0 : coinbase_tx.vin[0].nSequence = CTxIn::MAX_SEQUENCE_NONFINAL; // Make sure timelock is enforced.
48 [ # # ]: 0 : coinbase_tx.vout.resize(1);
49 : 0 : coinbase_tx.vout[0].scriptPubKey = P2WSH_OP_TRUE;
50 [ # # # # ]: 0 : coinbase_tx.vout[0].nValue = GetBlockSubsidy(height + 1, params.GetConsensus());
51 [ # # # # ]: 0 : coinbase_tx.vin[0].scriptSig = CScript() << (height + 1) << OP_0;
52 [ # # # # : 0 : block.vtx = {MakeTransactionRef(std::move(coinbase_tx))};
# # # # ]
53 : :
54 : 0 : block.nVersion = VERSIONBITS_LAST_OLD_BLOCK_VERSION;
55 [ # # # # : 0 : block.hashPrevBlock = (height >= 1 ? *ret.at(height - 1) : params.GenesisBlock()).GetHash();
# # ]
56 [ # # ]: 0 : block.hashMerkleRoot = BlockMerkleRoot(block);
57 : 0 : block.nTime = ++time;
58 : 0 : block.nBits = params.GenesisBlock().nBits;
59 : 0 : block.nNonce = 0;
60 : :
61 [ # # # # : 0 : while (!CheckProofOfWork(block.GetHash(), block.nBits, params.GetConsensus())) {
# # ]
62 : 0 : ++block.nNonce;
63 [ # # ]: 0 : assert(block.nNonce);
64 : : }
65 : 0 : }
66 : 0 : return ret;
67 [ # # # # ]: 0 : }
68 : :
69 : 0 : COutPoint MineBlock(const NodeContext& node, const node::BlockAssembler::Options& assembler_options)
70 : : {
71 : 0 : auto block = PrepareBlock(node, assembler_options);
72 [ # # ]: 0 : auto valid = MineBlock(node, block);
73 [ # # ]: 0 : assert(!valid.IsNull());
74 [ # # ]: 0 : return valid;
75 : 0 : }
76 : :
77 : : struct BlockValidationStateCatcher : public CValidationInterface {
78 : : const uint256 m_hash;
79 : : std::optional<BlockValidationState> m_state;
80 : :
81 : 0 : BlockValidationStateCatcher(const uint256& hash)
82 : 0 : : m_hash{hash},
83 : 0 : m_state{} {}
84 : :
85 : : protected:
86 : 0 : void BlockChecked(const CBlock& block, const BlockValidationState& state) override
87 : : {
88 [ # # ]: 0 : if (block.GetHash() != m_hash) return;
89 : 0 : m_state = state;
90 : : }
91 : : };
92 : :
93 : 0 : COutPoint MineBlock(const NodeContext& node, std::shared_ptr<CBlock>& block)
94 : : {
95 [ # # ]: 0 : while (!CheckProofOfWork(block->GetHash(), block->nBits, Params().GetConsensus())) {
96 [ # # ]: 0 : ++block->nNonce;
97 [ # # ]: 0 : assert(block->nNonce);
98 : : }
99 : :
100 : 0 : return ProcessBlock(node, block);
101 : : }
102 : :
103 : 0 : COutPoint ProcessBlock(const NodeContext& node, const std::shared_ptr<CBlock>& block)
104 : : {
105 : 0 : auto& chainman{*Assert(node.chainman)};
106 [ # # # # ]: 0 : const auto old_height = WITH_LOCK(chainman.GetMutex(), return chainman.ActiveHeight());
107 : 0 : bool new_block;
108 [ # # ]: 0 : BlockValidationStateCatcher bvsc{block->GetHash()};
109 [ # # ]: 0 : node.validation_signals->RegisterValidationInterface(&bvsc);
110 [ # # # # : 0 : const bool processed{chainman.ProcessNewBlock(block, true, true, &new_block)};
# # ]
111 [ # # # # ]: 0 : const bool duplicate{!new_block && processed};
112 : 0 : assert(!duplicate);
113 [ # # ]: 0 : node.validation_signals->UnregisterValidationInterface(&bvsc);
114 [ # # ]: 0 : node.validation_signals->SyncWithValidationInterfaceQueue();
115 [ # # # # ]: 0 : const bool was_valid{bvsc.m_state && bvsc.m_state->IsValid()};
116 [ # # # # : 0 : assert(old_height + was_valid == WITH_LOCK(chainman.GetMutex(), return chainman.ActiveHeight()));
# # # # ]
117 : :
118 [ # # ]: 0 : if (was_valid) return {block->vtx[0]->GetHash(), 0};
119 : 0 : return {};
120 : 0 : }
121 : :
122 : 0 : std::shared_ptr<CBlock> PrepareBlock(const NodeContext& node,
123 : : const BlockAssembler::Options& assembler_options)
124 : : {
125 : 0 : auto block = std::make_shared<CBlock>(
126 : 0 : BlockAssembler{Assert(node.chainman)->ActiveChainstate(), Assert(node.mempool.get()), assembler_options}
127 [ # # ]: 0 : .CreateNewBlock()
128 [ # # ]: 0 : ->block);
129 : :
130 [ # # ]: 0 : LOCK(cs_main);
131 [ # # # # : 0 : block->nTime = Assert(node.chainman)->ActiveChain().Tip()->GetMedianTimePast() + 1;
# # # # ]
132 [ # # ]: 0 : block->hashMerkleRoot = BlockMerkleRoot(*block);
133 : :
134 [ # # ]: 0 : return block;
135 : 0 : }
136 : 0 : std::shared_ptr<CBlock> PrepareBlock(const NodeContext& node, const CScript& coinbase_scriptPubKey)
137 : : {
138 : 0 : BlockAssembler::Options assembler_options;
139 : 0 : assembler_options.coinbase_output_script = coinbase_scriptPubKey;
140 [ # # ]: 0 : ApplyArgsManOptions(*node.args, assembler_options);
141 [ # # ]: 0 : return PrepareBlock(node, assembler_options);
142 : 0 : }
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