Function hook_gives_failmsg

lightningd/invoice.c:236–302

}

static const u8 *hook_gives_failmsg(const tal_t *ctx,
				    struct lightningd *ld,
				    const struct htlc_in *hin,
				    const char *buffer,
				    const jsmntok_t *toks)
{
	const jsmntok_t *resulttok;
	const jsmntok_t *t;
	unsigned int val;

	/* 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")) {
			return failmsg_incorrect_or_unknown(ctx, ld, hin);
		} 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) {
		const u8 *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;
	}

	if (!deprecated_apis)
		return NULL;

	t = json_get_member(buffer, toks, "failure_code");
	if (!t) {
		static bool warned = false;
		if (!warned) {
			warned = true;
			log_unusual(ld->log,
				    "Plugin did not return object with "
				    "'result' or 'failure_message' fields.  "
				    "This is now deprecated and you should "
				    "return {'result': 'continue' } or "
				    "{'result': 'reject'} or "
				    "{'failure_message'... instead.");
		}
		return failmsg_incorrect_or_unknown(ctx, ld, hin);
	}

	if (!json_to_number(buffer, t, &val))
		fatal("Invalid invoice_payment_hook failure_code: %.*s",
		      toks[0].end - toks[1].start, buffer);

	if (val == WIRE_TEMPORARY_NODE_FAILURE)