Function psbt_finalize

bitcoin/psbt.c:598–646

}

bool psbt_finalize(struct wally_psbt *psbt)
{
	bool ok;

	tal_wally_start();

	/* Wally doesn't know how to finalize P2WSH; this happens with
	 * option_anchor_outputs, and finalizing is trivial. */
	/* FIXME: miniscript! miniscript! miniscript! */
	for (size_t i = 0; i < psbt->num_inputs; i++) {
		struct wally_psbt_input *input = &psbt->inputs[i];
		struct wally_tx_witness_stack *stack;

		if (!is_anchor_witness_script(input->witness_script,
					      input->witness_script_len))
			continue;

		if (input->signatures.num_items != 1)
			continue;

		/* BOLT #3:
		 * #### `to_remote` Output
		 *
		 * If `option_anchors` applies to the commitment
		 * transaction, the `to_remote` output is encumbered by a one
		 * block csv lock.
		 *
		 *    <remotepubkey> OP_CHECKSIGVERIFY 1 OP_CHECKSEQUENCEVERIFY
		 *
		 * The output is spent by an input with `nSequence`
		 * field set to `1` and witness:
		 *
		 *    <remote_sig>
		 */
		wally_tx_witness_stack_init_alloc(2, &stack);
		wally_tx_witness_stack_add(stack,
					   input->signatures.items[0].value,
					   input->signatures.items[0].value_len);
		wally_tx_witness_stack_add(stack,
					   input->witness_script,
					   input->witness_script_len);
		wally_psbt_input_set_final_witness(input, stack);
	}

	ok = (wally_psbt_finalize(psbt) == WALLY_OK);
	tal_wally_end(psbt);

	return ok && psbt_is_finalized(psbt);
}

struct wally_tx *psbt_final_tx(const tal_t *ctx, const struct wally_psbt *psbt)
{