let round_trip s =
  let s' = s |> B32.encode |> B32.decode |> Result.get_ok in
  match s' = s with
  | false -> Fmt.failwith "b32 round trip failure: @\nin :`%S`@\nout:`%S`" s' s
  | true -> ()

let () =
  let s = String.init 0xff Char.chr in
  round_trip s;
  let s_l = List.init 0x0f (fun i -> String.init i Char.chr) in
  List.iter round_trip s_l; ()

let () =
  let input = "91JPRV3F5GG4EKJNDSJQ8" in
  let expected =
    "D0R24RZ1TPASVQ2NY56CT8AJDYZE9ZGDB0GVZ05E9D4YGZQW2RC5YFPQ0Q86EPW836DY7VYQTNFFJT3ZR2K508F4JVS5JNJKYN2MMFR"
  in
  let output =
    input
    |> B32.decode
    |> Result.get_ok
    |> Hash.H64.hash
    |> Hash.H64.to_octets
    |> B32.encode
  in
  assert (output = expected);

  ()