You can search for identifiers within the package.
in-package search v0.2.0
type key = Stdlib.Bytes.t
val keybytes : int
val tagbytes : int
val unsafe_of_bytes : bytes -> bytes
val blit_of_bytes : bytes -> int -> bytes
val genkey : unit -> Hacl_star__Hacl.bytes
val secretbox : key:Hacl_star__Hacl.bytes -> nonce:Hacl_star__Hacl.bytes -> msg:Hacl_star__Hacl.bytes -> cmsg:Hacl_star__Hacl.bytes -> unit
val secretbox_open : key:Hacl_star__Hacl.bytes -> nonce:Hacl_star__Hacl.bytes -> cmsg:Hacl_star__Hacl.bytes -> msg:Hacl_star__Hacl.bytes -> bool