Function hook_extract_psbt

lightningd/dual_open_control.c:413–457

static bool
hook_extract_psbt(const tal_t *ctx, struct subd *dualopend, const char *buffer,
		  const jsmntok_t *toks, char *hook_name,
		  bool allow_empty,
		  struct wally_psbt **out)
{
	if (!buffer)
		fatal("Plugin must return a valid response to %s", hook_name);

	const jsmntok_t *t = json_get_member(buffer, toks, "result");
	if (!t)
		fatal("Plugin must return a 'result' to %s"
		      "%.*s", hook_name, toks[0].end - toks[0].start,
		      buffer + toks[0].start);

	if (!json_tok_streq(buffer, t, "continue")) {
		/* dualopend might have closed if we're on the signed round */
		if (dualopend) {
			char *errmsg = "Client error. Unable to continue";
			subd_send_msg(dualopend,
				      take(towire_dualopend_fail(NULL, errmsg)));
		}
		return false;
	}

	const jsmntok_t *psbt_tok = json_get_member(buffer, toks, "psbt");
	if (!psbt_tok) {
		if (!allow_empty)
			fatal("Plugin must return a 'psbt' to a 'continue'd"
			      "%s %.*s", hook_name,
			      toks[0].end - toks[0].start,
			      buffer + toks[0].start);
		*out = NULL;
		return true;
	}

	*out = json_to_psbt(ctx, buffer, psbt_tok);
	if (!*out)
		fatal("Plugin must return a valid 'psbt' to a 'continue'd"
		      "%s %.*s", hook_name,
		      toks[0].end - toks[0].start,
		      buffer + toks[0].start);

	return true;
}

/* The field is *always* assumed msats, as that's the unit
 * amount we're transitioning our API over to. A 'xxxsat'