Function bitcoin_tx_compute_fee

bitcoin/tx.c:133–145

* Compute how much fee we are actually sending with this transaction. */

 * Compute how much fee we are actually sending with this transaction.
 */
struct amount_sat bitcoin_tx_compute_fee(const struct bitcoin_tx *tx)
{
	struct amount_sat input_total = AMOUNT_SAT(0), input_amt;
	bool ok;

	for (size_t i = 0; i < tx->psbt->num_inputs; i++) {
		input_amt = psbt_input_get_amount(tx->psbt, i);
		ok = amount_sat_add(&input_total, input_total, input_amt);
		assert(ok);
	}

	return bitcoin_tx_compute_fee_w_inputs(tx, input_total);
}

/*
 * Add an explicit fee output if necessary.