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104 lines
3.9 KiB
104 lines
3.9 KiB
8 years ago
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// Copyright (c) 2016 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "bench.h"
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#include "key.h"
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#if defined(HAVE_CONSENSUS_LIB)
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#include "script/bitcoinconsensus.h"
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#endif
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#include "script/script.h"
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#include "script/sign.h"
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#include "streams.h"
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// FIXME: Dedup with BuildCreditingTransaction in test/script_tests.cpp.
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static CMutableTransaction BuildCreditingTransaction(const CScript& scriptPubKey)
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{
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CMutableTransaction txCredit;
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txCredit.nVersion = 1;
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txCredit.nLockTime = 0;
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txCredit.vin.resize(1);
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txCredit.vout.resize(1);
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txCredit.vin[0].prevout.SetNull();
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txCredit.vin[0].scriptSig = CScript() << CScriptNum(0) << CScriptNum(0);
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txCredit.vin[0].nSequence = CTxIn::SEQUENCE_FINAL;
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txCredit.vout[0].scriptPubKey = scriptPubKey;
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txCredit.vout[0].nValue = 1;
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return txCredit;
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}
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// FIXME: Dedup with BuildSpendingTransaction in test/script_tests.cpp.
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static CMutableTransaction BuildSpendingTransaction(const CScript& scriptSig, const CMutableTransaction& txCredit)
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{
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CMutableTransaction txSpend;
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txSpend.nVersion = 1;
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txSpend.nLockTime = 0;
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txSpend.vin.resize(1);
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txSpend.vout.resize(1);
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txSpend.wit.vtxinwit.resize(1);
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txSpend.vin[0].prevout.hash = txCredit.GetHash();
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txSpend.vin[0].prevout.n = 0;
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txSpend.vin[0].scriptSig = scriptSig;
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txSpend.vin[0].nSequence = CTxIn::SEQUENCE_FINAL;
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txSpend.vout[0].scriptPubKey = CScript();
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txSpend.vout[0].nValue = txCredit.vout[0].nValue;
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return txSpend;
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}
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// Microbenchmark for verification of a basic P2WPKH script. Can be easily
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// modified to measure performance of other types of scripts.
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static void VerifyScriptBench(benchmark::State& state)
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{
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const int flags = SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_P2SH;
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const int witnessversion = 0;
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// Keypair.
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CKey key;
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const unsigned char vchKey[32] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1};
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key.Set(vchKey, vchKey + 32, false);
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CPubKey pubkey = key.GetPubKey();
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uint160 pubkeyHash;
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CHash160().Write(pubkey.begin(), pubkey.size()).Finalize(pubkeyHash.begin());
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// Script.
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CScript scriptPubKey = CScript() << witnessversion << ToByteVector(pubkeyHash);
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CScript scriptSig;
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CScript witScriptPubkey = CScript() << OP_DUP << OP_HASH160 << ToByteVector(pubkeyHash) << OP_EQUALVERIFY << OP_CHECKSIG;
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CTransaction txCredit = BuildCreditingTransaction(scriptPubKey);
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CMutableTransaction txSpend = BuildSpendingTransaction(scriptSig, txCredit);
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CScriptWitness& witness = txSpend.wit.vtxinwit[0].scriptWitness;
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witness.stack.emplace_back();
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key.Sign(SignatureHash(witScriptPubkey, txSpend, 0, SIGHASH_ALL, txCredit.vout[0].nValue, SIGVERSION_WITNESS_V0), witness.stack.back(), 0);
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witness.stack.back().push_back(static_cast<unsigned char>(SIGHASH_ALL));
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witness.stack.push_back(ToByteVector(pubkey));
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// Benchmark.
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while (state.KeepRunning()) {
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ScriptError err;
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bool success = VerifyScript(
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txSpend.vin[0].scriptSig,
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txCredit.vout[0].scriptPubKey,
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&txSpend.wit.vtxinwit[0].scriptWitness,
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flags,
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MutableTransactionSignatureChecker(&txSpend, 0, txCredit.vout[0].nValue),
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&err);
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assert(err == SCRIPT_ERR_OK);
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assert(success);
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#if defined(HAVE_CONSENSUS_LIB)
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CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
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stream << txSpend;
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int csuccess = bitcoinconsensus_verify_script_with_amount(
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begin_ptr(txCredit.vout[0].scriptPubKey),
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txCredit.vout[0].scriptPubKey.size(),
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txCredit.vout[0].nValue,
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(const unsigned char*)&stream[0], stream.size(), 0, flags, nullptr);
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assert(csuccess == 1);
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#endif
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}
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}
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BENCHMARK(VerifyScriptBench);
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