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// Copyright (c) 2011-2018 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 <bench/bench.h>
#include <chainparams.h>
#include <coins.h>
#include <consensus/merkle.h>
#include <consensus/validation.h>
#include <miner.h>
#include <policy/policy.h>
#include <pow.h>
#include <scheduler.h>
#include <txdb.h>
#include <txmempool.h>
#include <utiltime.h>
#include <validation.h>
#include <validationinterface.h>
#include <boost/thread.hpp>
#include <list>
#include <vector>
static std::shared_ptr<CBlock> PrepareBlock(const CScript& coinbase_scriptPubKey)
{
auto block = std::make_shared<CBlock>(
BlockAssembler{Params()}
.CreateNewBlock(coinbase_scriptPubKey, /* fMineWitnessTx */ true)
->block);
block->nTime = ::chainActive.Tip()->GetMedianTimePast() + 1;
block->hashMerkleRoot = BlockMerkleRoot(*block);
return block;
}
static CTxIn MineBlock(const CScript& coinbase_scriptPubKey)
{
auto block = PrepareBlock(coinbase_scriptPubKey);
while (!CheckProofOfWork(block->GetHash(), block->nBits, Params().GetConsensus())) {
assert(++block->nNonce);
}
bool processed{ProcessNewBlock(Params(), block, true, nullptr)};
assert(processed);
return CTxIn{block->vtx[0]->GetHash(), 0};
}
static void AssembleBlock(benchmark::State& state)
{
const std::vector<unsigned char> op_true{OP_TRUE};
CScriptWitness witness;
witness.stack.push_back(op_true);
uint256 witness_program;
CSHA256().Write(&op_true[0], op_true.size()).Finalize(witness_program.begin());
const CScript SCRIPT_PUB{CScript(OP_0) << std::vector<unsigned char>{witness_program.begin(), witness_program.end()}};
// Switch to regtest so we can mine faster
// Also segwit is active, so we can include witness transactions
SelectParams(CBaseChainParams::REGTEST);
InitScriptExecutionCache();
boost::thread_group thread_group;
CScheduler scheduler;
{
::pblocktree.reset(new CBlockTreeDB(1 << 20, true));
::pcoinsdbview.reset(new CCoinsViewDB(1 << 23, true));
::pcoinsTip.reset(new CCoinsViewCache(pcoinsdbview.get()));
const CChainParams& chainparams = Params();
thread_group.create_thread(boost::bind(&CScheduler::serviceQueue, &scheduler));
GetMainSignals().RegisterBackgroundSignalScheduler(scheduler);
LoadGenesisBlock(chainparams);
CValidationState state;
ActivateBestChain(state, chainparams);
assert(::chainActive.Tip() != nullptr);
const bool witness_enabled{IsWitnessEnabled(::chainActive.Tip(), chainparams.GetConsensus())};
assert(witness_enabled);
}
// Collect some loose transactions that spend the coinbases of our mined blocks
constexpr size_t NUM_BLOCKS{200};
std::array<CTransactionRef, NUM_BLOCKS - COINBASE_MATURITY + 1> txs;
for (size_t b{0}; b < NUM_BLOCKS; ++b) {
CMutableTransaction tx;
tx.vin.push_back(MineBlock(SCRIPT_PUB));
tx.vin.back().scriptWitness = witness;
tx.vout.emplace_back(1337, SCRIPT_PUB);
if (NUM_BLOCKS - b >= COINBASE_MATURITY)
txs.at(b) = MakeTransactionRef(tx);
}
for (const auto& txr : txs) {
CValidationState state;
bool ret{::AcceptToMemoryPool(::mempool, state, txr, nullptr /* pfMissingInputs */, nullptr /* plTxnReplaced */, false /* bypass_limits */, /* nAbsurdFee */ 0)};
assert(ret);
}
while (state.KeepRunning()) {
PrepareBlock(SCRIPT_PUB);
}
thread_group.interrupt_all();
thread_group.join_all();
GetMainSignals().FlushBackgroundCallbacks();
GetMainSignals().UnregisterBackgroundSignalScheduler();
}
BENCHMARK(AssembleBlock, 700);
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