sphinx: Moving HMAC to the end of the packet

Signed-off-by: Christian Decker <decker.christian@gmail.com>

lightningd/sphinx.c

@@ -70,8 +70,8 @@ u8 *serialize_onionpacket(
 
 	write_buffer(dst, &m->version, 1, &p);
 	write_buffer(dst, der, outputlen, &p);
-	write_buffer(dst, m->mac, sizeof(m->mac), &p);
 	write_buffer(dst, m->routinginfo, ROUTING_INFO_SIZE, &p);
+	write_buffer(dst, m->mac, sizeof(m->mac), &p);
 	return dst;
 }
 
@@ -100,8 +100,8 @@ struct onionpacket *parse_onionpacket(
 	if (secp256k1_ec_pubkey_parse(secp256k1_ctx, &m->ephemeralkey, rawEphemeralkey, 33) != 1)
 		return tal_free(m);
 
-	read_buffer(&m->mac, src, 20, &p);
 	read_buffer(&m->routinginfo, src, ROUTING_INFO_SIZE, &p);
+	read_buffer(&m->mac, src, 20, &p);
 	return m;
 }