Function psbt_input_get_weight

bitcoin/psbt.c:617–655

}

size_t psbt_input_get_weight(const struct wally_psbt *psbt,
			     size_t in,
			     enum PSBT_GUESS guess)
{
	size_t weight;
	const struct wally_map_item *redeem_script;
	struct wally_psbt_input *input = &psbt->inputs[in];
	struct wally_tx_output *utxo_out = NULL;

	if (input->utxo)
		utxo_out = &input->utxo->outputs[input->index];

	redeem_script = wally_map_get_integer(&psbt->inputs[in].psbt_fields, /* PSBT_IN_REDEEM_SCRIPT */ 0x04);

	/* txid + txout + sequence */
	weight = (32 + 4 + 4) * 4;
	if (redeem_script) {
		weight +=
			(redeem_script->value_len +
				varint_size(redeem_script->value_len)) * 4;
	} else if ((guess & PSBT_GUESS_2OF2)
		   && utxo_out
		   && is_p2wsh(utxo_out->script, utxo_out->script_len, NULL)) {
		weight = bitcoin_tx_input_weight(false,
						 bitcoin_tx_2of2_input_witness_weight());
	} else if (utxo_out
		   && is_p2wpkh(utxo_out->script, utxo_out->script_len, NULL)) {
		weight = bitcoin_tx_input_weight(false,
						 bitcoin_tx_input_witness_weight(UTXO_P2SH_P2WPKH));
	} else if (utxo_out
		   && is_p2tr(utxo_out->script, utxo_out->script_len, NULL)) {
		weight = bitcoin_tx_input_weight(false,
						 bitcoin_tx_input_witness_weight(UTXO_P2TR));
	} else {
		weight += varint_size(0) * 4;
	}

	return weight;
}

struct amount_sat psbt_output_get_amount(const struct wally_psbt *psbt,
					 size_t out)