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           2 : #include <node/context.h>
      12           2 : #include <pow.h>
      13           2 : #include <primitives/transaction.h>
      14           2 : #include <test/util/script.h>
      15           2 : #include <util/check.h>
      16             : #include <validation.h>
      17           2 : #include <validationinterface.h>
      18           2 : #include <versionbits.h>
      19             : 
      20             : using node::BlockAssembler;
      21             : using node::NodeContext;
      22             : 
      23           0 : COutPoint generatetoaddress(const NodeContext& node, const std::string& address)
      24             : {
      25           0 :     const auto dest = DecodeDestination(address);
      26           0 :     assert(IsValidDestination(dest));
      27           0 :     const auto coinbase_script = GetScriptForDestination(dest);
      28             : 
      29           0 :     return MineBlock(node, coinbase_script);
      30           0 : }
      31             : 
      32           0 : std::vector<std::shared_ptr<CBlock>> CreateBlockChain(size_t total_height, const CChainParams& params)
      33             : {
      34           0 :     std::vector<std::shared_ptr<CBlock>> ret{total_height};
      35           0 :     auto time{params.GenesisBlock().nTime};
      36           0 :     for (size_t height{0}; height < total_height; ++height) {
      37           0 :         CBlock& block{*(ret.at(height) = std::make_shared<CBlock>())};
      38             : 
      39           0 :         CMutableTransaction coinbase_tx;
      40           0 :         coinbase_tx.vin.resize(1);
      41           0 :         coinbase_tx.vin[0].prevout.SetNull();
      42           0 :         coinbase_tx.vout.resize(1);
      43           0 :         coinbase_tx.vout[0].scriptPubKey = P2WSH_OP_TRUE;
      44           0 :         coinbase_tx.vout[0].nValue = GetBlockSubsidy(height + 1, params.GetConsensus());
      45           0 :         coinbase_tx.vin[0].scriptSig = CScript() << (height + 1) << OP_0;
      46           0 :         block.vtx = {MakeTransactionRef(std::move(coinbase_tx))};
      47             : 
      48           0 :         block.nVersion = VERSIONBITS_LAST_OLD_BLOCK_VERSION;
      49           0 :         block.hashPrevBlock = (height >= 1 ? *ret.at(height - 1) : params.GenesisBlock()).GetHash();
      50           0 :         block.hashMerkleRoot = BlockMerkleRoot(block);
      51           0 :         block.nTime = ++time;
      52           0 :         block.nBits = params.GenesisBlock().nBits;
      53           0 :         block.nNonce = 0;
      54             : 
      55           0 :         while (!CheckProofOfWork(block.GetHash(), block.nBits, params.GetConsensus())) {
      56           0 :             ++block.nNonce;
      57           0 :             assert(block.nNonce);
      58             :         }
      59           0 :     }
      60           0 :     return ret;
      61           0 : }
      62             : 
      63         200 : COutPoint MineBlock(const NodeContext& node, const CScript& coinbase_scriptPubKey)
      64             : {
      65         200 :     auto block = PrepareBlock(node, coinbase_scriptPubKey);
      66         200 :     auto valid = MineBlock(node, block);
      67         200 :     assert(!valid.IsNull());
      68             :     return valid;
      69         200 : }
      70             : 
      71             : struct BlockValidationStateCatcher : public CValidationInterface {
      72             :     const uint256 m_hash;
      73             :     std::optional<BlockValidationState> m_state;
      74           2 : 
      75         200 :     BlockValidationStateCatcher(const uint256& hash)
      76         200 :         : m_hash{hash},
      77         400 :           m_state{} {}
      78             : 
      79             : protected:
      80         200 :     void BlockChecked(const CBlock& block, const BlockValidationState& state) override
      81             :     {
      82         200 :         if (block.GetHash() != m_hash) return;
      83         200 :         m_state = state;
      84         200 :     }
      85             : };
      86             : 
      87         200 : COutPoint MineBlock(const NodeContext& node, std::shared_ptr<CBlock>& block)
      88             : {
      89         470 :     while (!CheckProofOfWork(block->GetHash(), block->nBits, Params().GetConsensus())) {
      90         270 :         ++block->nNonce;
      91         270 :         assert(block->nNonce);
      92             :     }
      93             : 
      94         200 :     auto& chainman{*Assert(node.chainman)};
      95         400 :     const auto old_height = WITH_LOCK(chainman.GetMutex(), return chainman.ActiveHeight());
      96             :     bool new_block;
      97         200 :     BlockValidationStateCatcher bvsc{block->GetHash()};
      98         200 :     RegisterValidationInterface(&bvsc);
      99         200 :     const bool processed{chainman.ProcessNewBlock(block, true, true, &new_block)};
     100         200 :     const bool duplicate{!new_block && processed};
     101         200 :     assert(!duplicate);
     102         200 :     UnregisterValidationInterface(&bvsc);
     103         200 :     SyncWithValidationInterfaceQueue();
     104         400 :     const bool was_valid{bvsc.m_state && bvsc.m_state->IsValid()};
     105         400 :     assert(old_height + was_valid == WITH_LOCK(chainman.GetMutex(), return chainman.ActiveHeight()));
     106             : 
     107         200 :     if (was_valid) return {block->vtx[0]->GetHash(), 0};
     108           0 :     return {};
     109         200 : }
     110             : 
     111         200 : std::shared_ptr<CBlock> PrepareBlock(const NodeContext& node, const CScript& coinbase_scriptPubKey,
     112             :                                      const BlockAssembler::Options& assembler_options)
     113             : {
     114         200 :     auto block = std::make_shared<CBlock>(
     115         200 :         BlockAssembler{Assert(node.chainman)->ActiveChainstate(), Assert(node.mempool.get()), assembler_options}
     116         200 :             .CreateNewBlock(coinbase_scriptPubKey)
     117         200 :             ->block);
     118             : 
     119         200 :     LOCK(cs_main);
     120         200 :     block->nTime = Assert(node.chainman)->ActiveChain().Tip()->GetMedianTimePast() + 1;
     121         200 :     block->hashMerkleRoot = BlockMerkleRoot(*block);
     122             : 
     123         200 :     return block;
     124         200 : }
     125         200 : std::shared_ptr<CBlock> PrepareBlock(const NodeContext& node, const CScript& coinbase_scriptPubKey)
     126             : {
     127         200 :     BlockAssembler::Options assembler_options;
     128         200 :     ApplyArgsManOptions(*node.args, assembler_options);
     129         200 :     return PrepareBlock(node, coinbase_scriptPubKey, assembler_options);
     130             : }