138 lines
4.5 KiB
OCaml
138 lines
4.5 KiB
OCaml
(*****************************************************************************)
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(* *)
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(* Open Source License *)
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(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com> *)
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(* *)
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(* Permission is hereby granted, free of charge, to any person obtaining a *)
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(* copy of this software and associated documentation files (the "Software"),*)
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(* to deal in the Software without restriction, including without limitation *)
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(* the rights to use, copy, modify, merge, publish, distribute, sublicense, *)
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(* and/or sell copies of the Software, and to permit persons to whom the *)
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(* Software is furnished to do so, subject to the following conditions: *)
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(* *)
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(* The above copyright notice and this permission notice shall be included *)
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(* in all copies or substantial portions of the Software. *)
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(* *)
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(* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR*)
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(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *)
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(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *)
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(* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER*)
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(* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *)
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(* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *)
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(* DEALINGS IN THE SOFTWARE. *)
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(* *)
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(*****************************************************************************)
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open Error_monad
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type t = string
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let name = "Chain_id"
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let title = "Network identifier"
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let extract bh =
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MBytes.sub_string (Block_hash.to_bytes bh) 0 4
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let hash_bytes ?key l = extract (Block_hash.hash_bytes ?key l)
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let hash_string ?key l = extract (Block_hash.hash_string ?key l)
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let size = 4
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let of_string_opt s =
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if String.length s <> size then None else Some s
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let of_string s =
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match of_string_opt s with
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| None ->
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generic_error
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"%s.of_string: wrong string size (%d)"
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name (String.length s)
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| Some h -> Ok h
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let of_string_exn s =
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match of_string_opt s with
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| None ->
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Format.kasprintf invalid_arg
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"%s.of_string_exn: wrong string size (%d)"
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name (String.length s)
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| Some h -> h
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let to_string s = s
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let of_hex s = of_string (Hex.to_string s)
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let of_hex_opt s = of_string_opt (Hex.to_string s)
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let of_hex_exn s = of_string_exn (Hex.to_string s)
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let to_hex s = Hex.of_string (to_string s)
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let of_bytes_opt b =
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if MBytes.length b <> size then
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None
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else
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Some (MBytes.to_string b)
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let of_bytes_exn b =
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match of_bytes_opt b with
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| None ->
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let msg =
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Printf.sprintf "%s.of_bytes: wrong string size (%d)"
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name (MBytes.length b) in
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raise (Invalid_argument msg)
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| Some h -> h
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let of_bytes s =
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match of_bytes_opt s with
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| Some x -> Ok x
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| None ->
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generic_error "Failed to deserialize a hash (%s)" name
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let to_bytes = MBytes.of_string
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(* let read src off = of_bytes_exn @@ MBytes.sub src off size *)
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(* let write dst off h = MBytes.blit (to_bytes h) 0 dst off size *)
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let path_length = 1
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let to_path key l =
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let `Hex h = to_hex key in
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h :: l
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let of_path path =
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let path = String.concat "" path in
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of_hex_opt (`Hex path)
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let of_path_exn path =
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let path = String.concat "" path in
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of_hex_exn (`Hex path)
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let prefix_path p =
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let `Hex p = Hex.of_string p in
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[ p ]
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let zero = of_hex_exn (`Hex (String.make (size * 2) '0'))
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type Base58.data += Data of t
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let b58check_encoding =
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Base58.register_encoding
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~prefix: Base58.Prefix.chain_id
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~length: size
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~wrap: (fun s -> Data s)
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~of_raw: of_string_opt
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~to_raw: to_string
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let raw_encoding =
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let open Data_encoding in
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conv to_bytes of_bytes_exn (Fixed.bytes size)
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let hash h =
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Int32.to_int (MBytes.get_int32 (to_bytes h) 0)
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let of_block_hash bh = hash_bytes [Block_hash.to_bytes bh]
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include Compare.Make(struct
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type nonrec t = t
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let compare = String.compare
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end)
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include Helpers.Make(struct
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type nonrec t = t
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let title = title
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let name = name
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let b58check_encoding = b58check_encoding
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let raw_encoding = raw_encoding
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let compare = compare
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let equal = equal
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let hash = hash
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end)
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