Function GetBlockScriptFlags

src/validation.cpp:2256–2295

}

script_verify_flags GetBlockScriptFlags(const CBlockIndex& block_index, const ChainstateManager& chainman)
{
    const Consensus::Params& consensusparams = chainman.GetConsensus();

    // BIP16 didn't become active until Apr 1 2012 (on mainnet, and
    // retroactively applied to testnet)
    // However, only one historical block violated the P2SH rules (on both
    // mainnet and testnet).
    // Similarly, only one historical block violated the TAPROOT rules on
    // mainnet.
    // For simplicity, always leave P2SH+WITNESS+TAPROOT on except for the two
    // violating blocks.
    script_verify_flags flags{SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_WITNESS | SCRIPT_VERIFY_TAPROOT};
    const auto it{consensusparams.script_flag_exceptions.find(*Assert(block_index.phashBlock))};
    if (it != consensusparams.script_flag_exceptions.end()) {
        flags = it->second;
    }

    // Enforce the DERSIG (BIP66) rule
    if (DeploymentActiveAt(block_index, chainman, Consensus::DEPLOYMENT_DERSIG)) {
        flags |= SCRIPT_VERIFY_DERSIG;
    }

    // Enforce CHECKLOCKTIMEVERIFY (BIP65)
    if (DeploymentActiveAt(block_index, chainman, Consensus::DEPLOYMENT_CLTV)) {
        flags |= SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY;
    }

    // Enforce CHECKSEQUENCEVERIFY (BIP112)
    if (DeploymentActiveAt(block_index, chainman, Consensus::DEPLOYMENT_CSV)) {
        flags |= SCRIPT_VERIFY_CHECKSEQUENCEVERIFY;
    }

    // Enforce BIP147 NULLDUMMY (activated simultaneously with segwit)
    if (DeploymentActiveAt(block_index, chainman, Consensus::DEPLOYMENT_SEGWIT)) {
        flags |= SCRIPT_VERIFY_NULLDUMMY;
    }

    return flags;
}


/** Apply the effects of this block (with given index) on the UTXO set represented by coins.