Function bitcoin_tx_add_input

bitcoin/tx.c:186–226

}

int bitcoin_tx_add_input(struct bitcoin_tx *tx,
			 const struct bitcoin_outpoint *outpoint,
			 u32 sequence, const u8 *scriptSig,
			 struct amount_sat amount, const u8 *scriptPubkey,
			 const u8 *input_wscript)
{
	int wally_err;
	int input_num = tx->wtx->num_inputs;

	psbt_append_input(tx->psbt, outpoint,
			  sequence, scriptSig,
			  input_wscript, NULL);

	if (input_wscript) {
		scriptPubkey = scriptpubkey_p2wsh(tmpctx, input_wscript);
	}

	assert(scriptPubkey);
	psbt_input_set_wit_utxo(tx->psbt, input_num,
				scriptPubkey, amount);

	tal_wally_start();
	wally_err = wally_tx_add_input(tx->wtx,
				       &tx->psbt->tx->inputs[input_num]);
	assert(wally_err == WALLY_OK);

	/* scriptsig isn't actually stored in psbt input, so add that now */
	wally_tx_set_input_script(tx->wtx, input_num,
				  scriptSig, tal_bytelen(scriptSig));
	tal_wally_end(tx->wtx);

	if (is_elements(chainparams)) {
		struct amount_asset asset;
		/* FIXME: persist asset tags */
		asset = amount_sat_to_asset(&amount,
					    chainparams->fee_asset_tag);
		/* FIXME: persist nonces */
		psbt_elements_input_set_asset(tx->psbt, input_num, &asset);
	}
	return input_num;
}

bool bitcoin_tx_check(const struct bitcoin_tx *tx)
{