Function hook_gives_failmsg

lightningd/invoice.c:224–261

Returns magic value to send generic incorrect_or_unknown_payment_details */

/* Returns magic value to send generic incorrect_or_unknown_payment_details */
static const u8 *hook_gives_failmsg(const tal_t *ctx,
				    struct lightningd *ld,
				    const char *buffer,
				    const jsmntok_t *toks)
{
	const jsmntok_t *resulttok;
	const jsmntok_t *t;
	const u8 *failmsg;

	/* No plugin registered on hook at all? */
	if (!buffer)
		return NULL;

	resulttok = json_get_member(buffer, toks, "result");
	if (resulttok) {
		if (json_tok_streq(buffer, resulttok, "continue")) {
			return NULL;
		} else if (json_tok_streq(buffer, resulttok, "reject")) {
			/* htlc_set_fail makes this a per-htlc
			 * incorrect_or_unknown_payment_details */
			return tal_arr(ctx, u8, 0);
		} else
			fatal("Invalid invoice_payment hook result: %.*s",
			      toks[0].end - toks[0].start, buffer);
	}

	t = json_get_member(buffer, toks, "failure_message");
	if (!t) {
		fatal("Missing failure_message in invoice_payment hook result: %.*s",
		      toks[0].end - toks[0].start, buffer);
	}

	failmsg = json_tok_bin_from_hex(ctx, buffer, t);
	if (!failmsg)
		fatal("Invalid invoice_payment_hook failure_message: %.*s",
		      toks[0].end - toks[1].start, buffer);
	return failmsg;
}

static void
invoice_payment_hooks_done(struct invoice_payment_hook_payload *payload STEALS)