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// Copyright (c) 2019-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <test/util/mining.h>
#include <chainparams.h>
#include <consensus/merkle.h>
#include <consensus/validation.h>
#include <key_io.h>
#include <node/context.h>
#include <pow.h>
#include <primitives/transaction.h>
#include <test/util/script.h>
#include <util/check.h>
#include <validation.h>
#include <validationinterface.h>
#include <versionbits.h>
using node::BlockAssembler;
using node::NodeContext;
COutPoint generatetoaddress(const NodeContext& node, const std::string& address)
{
const auto dest = DecodeDestination(address);
assert(IsValidDestination(dest));
const auto coinbase_script = GetScriptForDestination(dest);
return MineBlock(node, coinbase_script);
}
std::vector<std::shared_ptr<CBlock>> CreateBlockChain(size_t total_height, const CChainParams& params)
{
std::vector<std::shared_ptr<CBlock>> ret{total_height};
auto time{params.GenesisBlock().nTime};
for (size_t height{0}; height < total_height; ++height) {
CBlock& block{*(ret.at(height) = std::make_shared<CBlock>())};
CMutableTransaction coinbase_tx;
coinbase_tx.vin.resize(1);
coinbase_tx.vin[0].prevout.SetNull();
coinbase_tx.vout.resize(1);
coinbase_tx.vout[0].scriptPubKey = P2WSH_OP_TRUE;
coinbase_tx.vout[0].nValue = GetBlockSubsidy(height + 1, params.GetConsensus());
coinbase_tx.vin[0].scriptSig = CScript() << (height + 1) << OP_0;
block.vtx = {MakeTransactionRef(std::move(coinbase_tx))};
block.nVersion = VERSIONBITS_LAST_OLD_BLOCK_VERSION;
block.hashPrevBlock = (height >= 1 ? *ret.at(height - 1) : params.GenesisBlock()).GetHash();
block.hashMerkleRoot = BlockMerkleRoot(block);
block.nTime = ++time;
block.nBits = params.GenesisBlock().nBits;
block.nNonce = 0;
while (!CheckProofOfWork(block.GetHash(), block.nBits, params.GetConsensus())) {
++block.nNonce;
assert(block.nNonce);
}
}
return ret;
}
COutPoint MineBlock(const NodeContext& node, const CScript& coinbase_scriptPubKey)
{
auto block = PrepareBlock(node, coinbase_scriptPubKey);
auto valid = MineBlock(node, block);
assert(!valid.IsNull());
return valid;
}
struct BlockValidationStateCatcher : public CValidationInterface {
const uint256 m_hash;
std::optional<BlockValidationState> m_state;
BlockValidationStateCatcher(const uint256& hash)
: m_hash{hash},
m_state{} {}
protected:
void BlockChecked(const CBlock& block, const BlockValidationState& state) override
{
if (block.GetHash() != m_hash) return;
m_state = state;
}
};
COutPoint MineBlock(const NodeContext& node, std::shared_ptr<CBlock>& block)
{
while (!CheckProofOfWork(block->GetHash(), block->nBits, Params().GetConsensus())) {
++block->nNonce;
assert(block->nNonce);
}
auto& chainman{*Assert(node.chainman)};
const auto old_height = WITH_LOCK(chainman.GetMutex(), return chainman.ActiveHeight());
bool new_block;
BlockValidationStateCatcher bvsc{block->GetHash()};
node.validation_signals->RegisterValidationInterface(&bvsc);
const bool processed{chainman.ProcessNewBlock(block, true, true, &new_block)};
const bool duplicate{!new_block && processed};
assert(!duplicate);
node.validation_signals->UnregisterValidationInterface(&bvsc);
node.validation_signals->SyncWithValidationInterfaceQueue();
const bool was_valid{bvsc.m_state && bvsc.m_state->IsValid()};
assert(old_height + was_valid == WITH_LOCK(chainman.GetMutex(), return chainman.ActiveHeight()));
if (was_valid) return {block->vtx[0]->GetHash(), 0};
return {};
}
std::shared_ptr<CBlock> PrepareBlock(const NodeContext& node, const CScript& coinbase_scriptPubKey,
const BlockAssembler::Options& assembler_options)
{
auto block = std::make_shared<CBlock>(
BlockAssembler{Assert(node.chainman)->ActiveChainstate(), Assert(node.mempool.get()), assembler_options}
.CreateNewBlock(coinbase_scriptPubKey)
->block);
LOCK(cs_main);
block->nTime = Assert(node.chainman)->ActiveChain().Tip()->GetMedianTimePast() + 1;
block->hashMerkleRoot = BlockMerkleRoot(*block);
return block;
}
std::shared_ptr<CBlock> PrepareBlock(const NodeContext& node, const CScript& coinbase_scriptPubKey)
{
BlockAssembler::Options assembler_options;
ApplyArgsManOptions(*node.args, assembler_options);
return PrepareBlock(node, coinbase_scriptPubKey, assembler_options);
}
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