Function GetNextBlockScriptFlags

src/validation.cpp:2049–2117

Returns the script flags which should be checked for the block after the given block.

// Returns the script flags which should be checked for the block after
// the given block.
static uint32_t GetNextBlockScriptFlags(const CBlockIndex *pindex,
                                        const ChainstateManager &chainman) {
    const Consensus::Params &consensusparams = chainman.GetConsensus();

    uint32_t flags = SCRIPT_VERIFY_NONE;

    // Enforce P2SH (BIP16)
    if (DeploymentActiveAfter(pindex, chainman, Consensus::DEPLOYMENT_P2SH)) {
        flags |= SCRIPT_VERIFY_P2SH;
    }

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

    // Start enforcing CHECKLOCKTIMEVERIFY (BIP65) rule.
    if (DeploymentActiveAfter(pindex, chainman, Consensus::DEPLOYMENT_CLTV)) {
        flags |= SCRIPT_VERIFY_CHECKLOCKTIMEVERIFY;
    }

    // Start enforcing CSV (BIP68, BIP112 and BIP113) rule.
    if (DeploymentActiveAfter(pindex, chainman, Consensus::DEPLOYMENT_CSV)) {
        flags |= SCRIPT_VERIFY_CHECKSEQUENCEVERIFY;
    }

    // If the UAHF is enabled, we start accepting replay protected txns
    if (IsUAHFenabled(consensusparams, pindex)) {
        flags |= SCRIPT_VERIFY_STRICTENC;
        flags |= SCRIPT_ENABLE_SIGHASH_FORKID;
    }

    // If the DAA HF is enabled, we start rejecting transaction that use a high
    // s in their signature. We also make sure that signature that are supposed
    // to fail (for instance in multisig or other forms of smart contracts) are
    // null.
    if (IsDAAEnabled(consensusparams, pindex)) {
        flags |= SCRIPT_VERIFY_LOW_S;
        flags |= SCRIPT_VERIFY_NULLFAIL;
    }

    // When the magnetic anomaly fork is enabled, we start accepting
    // transactions using the OP_CHECKDATASIG opcode and it's verify
    // alternative. We also start enforcing push only signatures and
    // clean stack.
    if (IsMagneticAnomalyEnabled(consensusparams, pindex)) {
        flags |= SCRIPT_VERIFY_SIGPUSHONLY;
        flags |= SCRIPT_VERIFY_CLEANSTACK;
    }

    if (IsGravitonEnabled(consensusparams, pindex)) {
        flags |= SCRIPT_ENABLE_SCHNORR_MULTISIG;
        flags |= SCRIPT_VERIFY_MINIMALDATA;
    }

    if (IsPhononEnabled(consensusparams, pindex)) {
        flags |= SCRIPT_ENFORCE_SIGCHECKS;
    }