Function GetTransactionInputWeight

src/consensus/validation.h:166–170

    return ::GetSerializeSize(block, SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS | ser_flag) * (WITNESS_SCALE_FACTOR - 1) + ::GetSerializeSize(block, SER_NETWORK, PROTOCOL_VERSION | ser_flag);
}
static inline int64_t GetTransactionInputWeight(const CTxIn& txin)
{
    // scriptWitness size is added here because witnesses and txins are split up in segwit serialization.
    return ::GetSerializeSize(txin, SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS) * (WITNESS_SCALE_FACTOR - 1) + ::GetSerializeSize(txin, SER_NETWORK, PROTOCOL_VERSION) + ::GetSerializeSize(txin.scriptWitness.stack, SER_NETWORK, PROTOCOL_VERSION);
}

#endif // BITCOIN_CONSENSUS_VALIDATION_H