int64_t GetTransactionSigOpCost(const CTransaction& tx, const CCoinsViewCache& inputs, int flags) { int64_t nSigOps = GetLegacySigOpCount(tx) * WITNESS_SCALE_FACTOR; if (tx.IsCoinBase()) return nSigOps; if (flags & SCRIPT_VERIFY_P2SH) { nSigOps += GetP2SHSigOpCount(tx, inputs) * WITNESS_SCALE_FACTOR; } for (unsigned int i = 0; i < tx.vin.size(); i++) { const Coin& coin = inputs.AccessCoin(tx.vin[i].prevout); assert(!coin.IsSpent()); const CTxOut &prevout = coin.out; nSigOps += CountWitnessSigOps(tx.vin[i].scriptSig, prevout.scriptPubKey, &tx.vin[i].scriptWitness, flags); } return nSigOps; }
std::unique_ptr<CBlockTemplate> BlockAssembler::CreateNewBlock(const CScript& scriptPubKeyIn, bool fMineWitnessTx) { int64_t nTimeStart = GetTimeMicros(); resetBlock(); pblocktemplate.reset(new CBlockTemplate()); if(!pblocktemplate.get()) return nullptr; pblock = &pblocktemplate->block; // pointer for convenience // Add dummy coinbase tx as first transaction pblock->vtx.emplace_back(); pblocktemplate->vTxFees.push_back(-1); // updated at end pblocktemplate->vTxSigOpsCost.push_back(-1); // updated at end LOCK2(cs_main, mempool.cs); CBlockIndex* pindexPrev = chainActive.Tip(); assert(pindexPrev != nullptr); nHeight = pindexPrev->nHeight + 1; pblock->nVersion = ComputeBlockVersion(pindexPrev, chainparams.GetConsensus()); // -regtest only: allow overriding block.nVersion with // -blockversion=N to test forking scenarios if (chainparams.MineBlocksOnDemand()) pblock->nVersion = gArgs.GetArg("-blockversion", pblock->nVersion); pblock->nTime = GetAdjustedTime(); const int64_t nMedianTimePast = pindexPrev->GetMedianTimePast(); nLockTimeCutoff = (STANDARD_LOCKTIME_VERIFY_FLAGS & LOCKTIME_MEDIAN_TIME_PAST) ? nMedianTimePast : pblock->GetBlockTime(); // Decide whether to include witness transactions // This is only needed in case the witness softfork activation is reverted // (which would require a very deep reorganization) or when // -promiscuousmempoolflags is used. // TODO: replace this with a call to main to assess validity of a mempool // transaction (which in most cases can be a no-op). fIncludeWitness = IsWitnessEnabled(pindexPrev, chainparams.GetConsensus()) && fMineWitnessTx; int nPackagesSelected = 0; int nDescendantsUpdated = 0; addPackageTxs(nPackagesSelected, nDescendantsUpdated); int64_t nTime1 = GetTimeMicros(); nLastBlockTx = nBlockTx; nLastBlockWeight = nBlockWeight; // Create coinbase transaction. CMutableTransaction coinbaseTx; coinbaseTx.vin.resize(1); coinbaseTx.vin[0].prevout.SetNull(); coinbaseTx.vout.resize(1); coinbaseTx.vout[0].scriptPubKey = scriptPubKeyIn; coinbaseTx.vout[0].nValue = nFees + GetBlockSubsidy(nHeight, chainparams.GetConsensus()); coinbaseTx.vin[0].scriptSig = CScript() << nHeight << OP_0; pblock->vtx[0] = MakeTransactionRef(std::move(coinbaseTx)); pblocktemplate->vchCoinbaseCommitment = GenerateCoinbaseCommitment(*pblock, pindexPrev, chainparams.GetConsensus()); pblocktemplate->vTxFees[0] = -nFees; LogPrintf("CreateNewBlock(): block weight: %u txs: %u fees: %ld sigops %d\n", GetBlockWeight(*pblock), nBlockTx, nFees, nBlockSigOpsCost); // Fill in header pblock->hashPrevBlock = pindexPrev->GetBlockHash(); UpdateTime(pblock, chainparams.GetConsensus(), pindexPrev); pblock->nBits = GetNextWorkRequired(pindexPrev, pblock, chainparams.GetConsensus()); pblock->nNonce = 0; pblocktemplate->vTxSigOpsCost[0] = WITNESS_SCALE_FACTOR * GetLegacySigOpCount(*pblock->vtx[0]); CValidationState state; if (!TestBlockValidity(state, chainparams, *pblock, pindexPrev, false, false)) { throw std::runtime_error(strprintf("%s: TestBlockValidity failed: %s", __func__, FormatStateMessage(state))); } int64_t nTime2 = GetTimeMicros(); LogPrint(BCLog::BENCH, "CreateNewBlock() packages: %.2fms (%d packages, %d updated descendants), validity: %.2fms (total %.2fms)\n", 0.001 * (nTime1 - nTimeStart), nPackagesSelected, nDescendantsUpdated, 0.001 * (nTime2 - nTime1), 0.001 * (nTime2 - nTimeStart)); return std::move(pblocktemplate); }