Function GenerateCoinbaseCommitment

src/main.cpp:4907–4940

}

std::vector<unsigned char> GenerateCoinbaseCommitment(CBlock& block, const CBlockIndex* pindexPrev, const Consensus::Params& consensusParams, bool fProofOfStake)
{
    std::vector<unsigned char> commitment;
    int commitpos = GetWitnessCommitmentIndex(block);
    bool fHaveWitness = false;
    for (size_t t = 1; t < block.vtx.size(); t++) {
        if (!block.vtx[t].wit.IsNull()) {
            fHaveWitness = true;
            break;
        }
    }
    std::vector<unsigned char> ret(32, 0x00);
    if (fHaveWitness && IsWitnessEnabled(pindexPrev, consensusParams)) {
        if (commitpos == -1) {
            uint256 witnessroot = BlockWitnessMerkleRoot(block, NULL, &fProofOfStake);
            CHash256().Write(witnessroot.begin(), 32).Write(ret.data(), 32).Finalize(witnessroot.begin());
            CTxOut out;
            out.nValue = 0;
            out.scriptPubKey.resize(38);
            out.scriptPubKey[0] = OP_RETURN;
            out.scriptPubKey[1] = 0x24;
            out.scriptPubKey[2] = 0xaa;
            out.scriptPubKey[3] = 0x21;
            out.scriptPubKey[4] = 0xa9;
            out.scriptPubKey[5] = 0xed;
            memcpy(&out.scriptPubKey[6], witnessroot.begin(), 32);
            commitment = std::vector<unsigned char>(out.scriptPubKey.begin(), out.scriptPubKey.end());
            const_cast<std::vector<CTxOut>*>(&block.vtx[0].vout)->push_back(out);
            block.vtx[0].UpdateHash();
        }
    }
    UpdateUncommittedBlockStructures(block, pindexPrev, consensusParams);
    return commitment;
}

/** Turn the lowest '1' bit in the binary representation of a number into a '0'. */
int static inline InvertLowestOne(int n) { return n & (n - 1); }