Function psbt_txid

bitcoin/psbt.c:775–810

This only works on a non-final psbt because we're ALL SEGWIT! */

/* This only works on a non-final psbt because we're ALL SEGWIT! */
void psbt_txid(const tal_t *ctx,
	       const struct wally_psbt *psbt, struct bitcoin_txid *txid,
	       struct wally_tx **wtx)
{
	struct wally_tx *tx;

	/* You can *almost* take txid of global tx.  But @niftynei thought
	 * about this far more than me and pointed out that P2SH
	 * inputs would not be represented, so here we go. */
	tal_wally_start();
	wally_tx_clone_alloc(psbt->tx, 0, &tx);

	for (size_t i = 0; i < tx->num_inputs; i++) {
		if (psbt->inputs[i].final_scriptsig) {
			wally_tx_set_input_script(tx, i,
						  psbt->inputs[i].final_scriptsig,
						  psbt->inputs[i].final_scriptsig_len);
		} else if (psbt->inputs[i].redeem_script) {
			u8 *script;

			/* P2SH requires push of the redeemscript, from libwally src */
			script = tal_arr(tmpctx, u8, 0);
			script_push_bytes(&script,
					  psbt->inputs[i].redeem_script,
					  psbt->inputs[i].redeem_script_len);
			wally_tx_set_input_script(tx, i, script, tal_bytelen(script));
		}
	}
	tal_wally_end_onto(ctx, tx, struct wally_tx);

	wally_txid(tx, txid);
	if (wtx)
		*wtx = tx;
	else
		wally_tx_free(tx);
}

struct amount_sat psbt_compute_fee(const struct wally_psbt *psbt)
{