Function CheckTxScripts

src/test/transaction_tests.cpp:116–145

* Check that the input scripts of a transaction are valid/invalid as expected. */

* Check that the input scripts of a transaction are valid/invalid as expected.
*/
bool CheckTxScripts(const CTransaction& tx, const std::map<COutPoint, CScript>& map_prevout_scriptPubKeys,
    const std::map<COutPoint, int64_t>& map_prevout_values, unsigned int flags,
    const PrecomputedTransactionData& txdata, const std::string& strTest, bool expect_valid)
{
    bool tx_valid = true;
    ScriptError err = expect_valid ? SCRIPT_ERR_UNKNOWN_ERROR : SCRIPT_ERR_OK;
    for (unsigned int i = 0; i < tx.vin.size() && tx_valid; ++i) {
        const CTxIn input = tx.vin[i];
        const CAmount amount = map_prevout_values.count(input.prevout) ? map_prevout_values.at(input.prevout) : 0;
        try {
            const CScriptWitness *pScriptWitness = ((tx.witness.vtxinwit.size() > i) ? &tx.witness.vtxinwit[i].scriptWitness :  nullptr);
            flags &= ~SCRIPT_NO_SIGHASH_BYTE; // ELEMENTS: ensure that our random flag-setting doesn't cause the sighash byte to be misinterpreted
            tx_valid = VerifyScript(input.scriptSig, map_prevout_scriptPubKeys.at(input.prevout),
                pScriptWitness, flags, TransactionSignatureChecker(&tx, i, amount, txdata, MissingDataBehavior::ASSERT_FAIL), &err);
        } catch (...) {
            BOOST_ERROR("Bad test: " << strTest);
            return true; // The test format is bad and an error is thrown. Return true to silence further error.
        }
        if (expect_valid) {
            BOOST_CHECK_MESSAGE(tx_valid, strTest);
            BOOST_CHECK_MESSAGE((err == SCRIPT_ERR_OK), ScriptErrorString(err));
            err = SCRIPT_ERR_UNKNOWN_ERROR;
        }
    }
    if (!expect_valid) {
        BOOST_CHECK_MESSAGE(!tx_valid, strTest);
        BOOST_CHECK_MESSAGE((err != SCRIPT_ERR_OK), ScriptErrorString(err));
    }
    return (tx_valid == expect_valid);
}

/*
 * Trim or fill flags to make the combination valid: