extern bool send_ack(struct meshlink_handle *mesh, struct connection_t *);
extern bool send_ping(struct meshlink_handle *mesh, struct connection_t *);
extern bool send_pong(struct meshlink_handle *mesh, struct connection_t *);
-extern bool send_add_edge(struct meshlink_handle *mesh, struct connection_t *, const struct edge_t *);
-extern bool send_del_edge(struct meshlink_handle *mesh, struct connection_t *, const struct edge_t *);
+extern bool send_add_edge(struct meshlink_handle *mesh, struct connection_t *, const struct edge_t *, int contradictions);
+extern bool send_del_edge(struct meshlink_handle *mesh, struct connection_t *, const struct edge_t *, int contradictions);
extern void send_key_changed(struct meshlink_handle *mesh);
extern bool send_req_key(struct meshlink_handle *mesh, struct node_t *);