(** Trace ID.

    This 16 bytes identifier is shared by all spans in one trace. *)

type t

val create : unit -> t

val dummy : t

val compare : t -> t -> int

val pp : Format.formatter -> t -> unit

val is_valid : t -> bool

val to_bytes : t -> bytes

val of_bytes : bytes -> t

val to_hex : t -> string

val to_hex_into : t -> bytes -> int -> unit

val of_hex : string -> t

val of_hex_substring : string -> int -> t

module Map : Map.S with type key = t

val k_trace_id : t Hmap.key
(** Hmap key to carry around a {!Trace_id.t}, to remember what the current trace
    is.
    @since 0.8 *)