bool send_add_edge(struct meshlink_handle *mesh, struct connection_t *, const struct edge_t *, int contradictions);
bool send_del_edge(struct meshlink_handle *mesh, struct connection_t *, const struct edge_t *, int contradictions);
bool send_req_key(struct meshlink_handle *mesh, struct node_t *);
bool send_add_edge(struct meshlink_handle *mesh, struct connection_t *, const struct edge_t *, int contradictions);
bool send_del_edge(struct meshlink_handle *mesh, struct connection_t *, const struct edge_t *, int contradictions);
bool send_req_key(struct meshlink_handle *mesh, struct node_t *);