Function psbt_using_utxos

wallet/reservation.c:256–333

}

struct wally_psbt *psbt_using_utxos(const tal_t *ctx,
				    struct wallet *wallet,
				    struct utxo **utxos,
				    u32 nlocktime,
				    u32 nsequence,
				    struct wally_psbt *base)
{
	struct pubkey key;
	u8 *scriptSig, *scriptPubkey, *redeemscript;
	struct wally_psbt *psbt;

	if (base)
		psbt = base;
	else
		psbt = create_psbt(ctx, tal_count(utxos), 0, nlocktime);

	for (size_t i = 0; i < tal_count(utxos); i++) {
		u32 this_nsequence;
		struct bitcoin_tx *tx;

		if (utxos[i]->utxotype == UTXO_P2SH_P2WPKH) {
			bip32_pubkey(wallet->ld, &key, utxos[i]->keyindex);
			scriptSig = bitcoin_scriptsig_p2sh_p2wpkh(tmpctx, &key);
			redeemscript = bitcoin_redeem_p2sh_p2wpkh(tmpctx, &key);
			scriptPubkey = scriptpubkey_p2sh(tmpctx, redeemscript);

			/* Make sure we've got the right info! */
			if (utxos[i]->scriptPubkey)
				assert(tal_arr_eq(utxos[i]->scriptPubkey, scriptPubkey));
		} else {
			scriptSig = NULL;
			redeemscript = NULL;
			scriptPubkey = utxos[i]->scriptPubkey;
		}

		/* BOLT #3:
		 * #### `to_remote` Output
		 * ...
		 * The output is spent by an input with `nSequence` field
		 * set to `1` and witness:
		 */
		if (utxos[i]->close_info
		    && utxos[i]->close_info->option_anchors)
			this_nsequence = utxos[i]->close_info->csv;
		else
			this_nsequence = nsequence;

		psbt_append_input(psbt, &utxos[i]->outpoint,
				  this_nsequence, scriptSig,
				  NULL, redeemscript);

		psbt_input_set_wit_utxo(psbt, psbt->num_inputs-1,
					scriptPubkey, utxos[i]->amount);
		if (is_elements(chainparams)) {
			/* FIXME: persist asset tags */
			amount_sat_to_asset(&utxos[i]->amount,
						    chainparams->fee_asset_tag);
			/* FIXME: persist nonces */