Function handle_final_failure

plugins/libplugin-pay.c:1295–1395

}

static struct command_result *
handle_final_failure(struct command *cmd,
		     struct payment *p,
		     const struct node_id *final_id,
		     enum onion_wire failcode)
{
	u32 unused;

	/* Need to check for blockheight disagreement case here,
	 * otherwise we would set the abort flag too eagerly.
	 */
	if (failure_is_blockheight_disagreement(p, &unused)) {
		paymod_log(p, LOG_DBG,
			   "Blockheight disagreement, not aborting.");
		goto nonerror;
	}

	paymod_log(p, LOG_DBG,
		   "Final node %s reported %04x (%s) on route %s",
		   fmt_node_id(tmpctx, final_id),
		   failcode, onion_wire_name(failcode),
		   p->routetxt);

	/* We use an exhaustive switch statement here so you get a compile
	 * warning when new ones are added, and can think about where they go */
	switch (failcode) {
	case WIRE_FINAL_INCORRECT_CLTV_EXPIRY:
		report_tampering(p, tal_count(p->route)-1, "cltv");
		goto error;
	case WIRE_FINAL_INCORRECT_HTLC_AMOUNT:
		report_tampering(p, tal_count(p->route)-1, "amount");
		goto error;

	/* BOLT #4:
	 *
	 * A _forwarding node_ MAY, but a _final node_ MUST NOT:
	 *...
	 *     - return an `invalid_onion_version` error.
	 *...
	 *     - return an `invalid_onion_hmac` error.
	 *...
	 *     - return an `invalid_onion_key` error.
	 *...
	 *     - return a `temporary_channel_failure` error.
	 *...
	 *     - return a `permanent_channel_failure` error.
	 *...
	 *     - return a `required_channel_feature_missing` error.
	 *...
	 *     - return an `unknown_next_peer` error.
	 *...
	 *     - return an `amount_below_minimum` error.
	 *...
	 *     - return a `fee_insufficient` error.
	 *...
	 *     - return an `incorrect_cltv_expiry` error.
	 *...
	 *     - return an `expiry_too_soon` error.