Function process_channel_update_from_onion_error

plugins/xpay/xpay.c:702–813

Return true if this contained a channel_update which (potentially) changed something. */

/* Return true if this contained a channel_update which (potentially) changed something. */
static bool process_channel_update_from_onion_error(struct command *aux_cmd,
						    struct attempt *attempt,
						    const u8 *onion_message,
						    const char *errname)
{
	u8 *channel_update;
	struct amount_msat unused_msat;
	u32 unused32;
	secp256k1_ecdsa_signature signature;
	struct bitcoin_blkid chain_hash;
	struct short_channel_id_dir scidd;
	u32 timestamp;
	u8 message_flags, channel_flags;
	u16 cltv_expiry_delta;
	struct amount_msat htlc_minimum_msat, htlc_maximum_msat;
	u32 fee_base_msat, fee_proportional_millionths;
	struct out_req *req;
	const struct gossmap *gossmap;
	const struct gossmap_chan *c;

	/* Identify failcodes that have some channel_update.
	 *
	 * TODO > BOLT 1.0: Add new failcodes when updating to a
	 * new BOLT version. */
	if (!fromwire_temporary_channel_failure(tmpctx,
						onion_message,
						&channel_update) &&
	    !fromwire_amount_below_minimum(tmpctx,
					   onion_message, &unused_msat,
					   &channel_update) &&
	    !fromwire_fee_insufficient(tmpctx,
				       onion_message, &unused_msat,
				       &channel_update) &&
	    !fromwire_incorrect_cltv_expiry(tmpctx,
					    onion_message, &unused32,
					    &channel_update) &&
	    !fromwire_expiry_too_soon(tmpctx,
				      onion_message,
				      &channel_update))
		/* No channel update. */
		return false;

	/* LND before v0.18 (May 2024) would not include the
	 * WIRE_CHANNEL_UPDATE type field, but now they do. */
	if (!fromwire_channel_update(channel_update,
				     &signature,
				     &chain_hash,
				     &scidd.scid,
				     &timestamp,
				     &message_flags,
				     &channel_flags,
				     &cltv_expiry_delta,
				     &htlc_minimum_msat,
				     &fee_base_msat,
				     &fee_proportional_millionths,
				     &htlc_maximum_msat))
		return false;