Method AcceptSingleTransactionInternal

src/validation.cpp:1323–1436

}

MempoolAcceptResult MemPoolAccept::AcceptSingleTransactionInternal(const CTransactionRef& ptx, ATMPArgs& args)
{
    AssertLockHeld(cs_main);
    AssertLockHeld(m_pool.cs);

    Workspace ws(ptx);
    const std::vector<Wtxid> single_wtxid{ws.m_ptx->GetWitnessHash()};

    if (!PreChecks(args, ws)) {
        if (ws.m_state.GetResult() == TxValidationResult::TX_RECONSIDERABLE) {
            // Failed for fee reasons. Provide the effective feerate and which tx was included.
            return MempoolAcceptResult::FeeFailure(ws.m_state, CFeeRate(ws.m_modified_fees, ws.m_vsize), single_wtxid);
        }
        return MempoolAcceptResult::Failure(ws.m_state);
    }

    if (m_subpackage.m_rbf && !ReplacementChecks(ws)) {
        if (ws.m_state.GetResult() == TxValidationResult::TX_RECONSIDERABLE) {
            // Failed for incentives-based fee reasons. Provide the effective feerate and which tx was included.
            return MempoolAcceptResult::FeeFailure(ws.m_state, CFeeRate(ws.m_modified_fees, ws.m_vsize), single_wtxid);
        }
        return MempoolAcceptResult::Failure(ws.m_state);
    }

    // Check if the transaction would exceed the cluster size limit.
    if (!m_subpackage.m_changeset->CheckMemPoolPolicyLimits()) {
        ws.m_state.Invalid(TxValidationResult::TX_MEMPOOL_POLICY, "too-large-cluster", "");
        return MempoolAcceptResult::Failure(ws.m_state);
    }

    // Now that we've verified the cluster limit is respected, we can perform
    // calculations involving the full ancestors of the tx.
    if (ws.m_conflicts.size()) {
        auto ancestors = m_subpackage.m_changeset->CalculateMemPoolAncestors(ws.m_tx_handle);

        // A transaction that spends outputs that would be replaced by it is invalid. Now
        // that we have the set of all ancestors we can detect this
        // pathological case by making sure ws.m_conflicts and this tx's ancestors don't
        // intersect.
        if (const auto err_string{EntriesAndTxidsDisjoint(ancestors, ws.m_conflicts, ptx->GetHash())}) {
            // We classify this as a consensus error because a transaction depending on something it
            // conflicts with would be inconsistent.
            ws.m_state.Invalid(TxValidationResult::TX_CONSENSUS, "bad-txns-spends-conflicting-tx", *err_string);
            return MempoolAcceptResult::Failure(ws.m_state);
        }
    }

    m_subpackage.m_total_vsize = ws.m_vsize;
    m_subpackage.m_total_modified_fees = ws.m_modified_fees;

    // Individual modified feerate exceeded caller-defined max; abort
    if (args.m_client_maxfeerate && CFeeRate(ws.m_modified_fees, ws.m_vsize) > args.m_client_maxfeerate.value()) {
        ws.m_state.Invalid(TxValidationResult::TX_MEMPOOL_POLICY, "max feerate exceeded", "");
        return MempoolAcceptResult::Failure(ws.m_state);
    }

    if (!args.m_bypass_limits && m_pool.m_opts.require_standard) {
        Wtxid dummy_wtxid;