Function BulkTransaction

src/test/util/transaction_utils.cpp:74–92

}

void BulkTransaction(CMutableTransaction& tx, int32_t target_weight)
{
    tx.vout.emplace_back(0, CScript() << OP_RETURN);
    auto unpadded_weight{GetTransactionWeight(CTransaction(tx))};
    assert(target_weight >= unpadded_weight);

    // determine number of needed padding bytes by converting weight difference to vbytes
    auto dummy_vbytes = (target_weight - unpadded_weight + (WITNESS_SCALE_FACTOR - 1)) / WITNESS_SCALE_FACTOR;
    // compensate for the increase of the compact-size encoded script length
    // (note that the length encoding of the unpadded output script needs one byte)
    dummy_vbytes -= GetSizeOfCompactSize(dummy_vbytes) - 1;

    // pad transaction by repeatedly appending a dummy opcode to the output script
    tx.vout[0].scriptPubKey.insert(tx.vout[0].scriptPubKey.end(), dummy_vbytes, OP_1);

    // actual weight should be at most 3 higher than target weight
    assert(GetTransactionWeight(CTransaction(tx)) >= target_weight);
    assert(GetTransactionWeight(CTransaction(tx)) <= target_weight + 3);
}

bool SignSignature(const SigningProvider &provider, const CScript& fromPubKey, CMutableTransaction& txTo, unsigned int nIn, const CAmount& amount, int nHashType, SignatureData& sig_data)
{