80 lines
2.6 KiB
OCaml
80 lines
2.6 KiB
OCaml
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(**************************************************************************)
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(* *)
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(* Copyright (c) 2014 - 2016. *)
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(* Dynamic Ledger Solutions, Inc. <contact@tezos.com> *)
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(* *)
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(* All rights reserved. No warranty, explicit or implicit, provided. *)
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(* *)
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(**************************************************************************)
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open Tezos_hash
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(** Block header *)
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(** Exported type *)
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type header = {
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shell: Updater.shell_block_header ;
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proto: proto_header ;
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signature: Ed25519.signature ;
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}
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and proto_header = {
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mining_slot: mining_slot ;
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seed_nonce_hash: Nonce_hash.t ;
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proof_of_work_nonce: MBytes.t ;}
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and mining_slot = Raw_level_repr.t * Int32.t
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let mining_slot_encoding =
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let open Data_encoding in
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tup2 Raw_level_repr.encoding int32
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let proto_header_encoding =
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let open Data_encoding in
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conv
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(fun { mining_slot ; seed_nonce_hash ; proof_of_work_nonce } ->
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(mining_slot, seed_nonce_hash, proof_of_work_nonce))
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(fun (mining_slot, seed_nonce_hash, proof_of_work_nonce) ->
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{ mining_slot ; seed_nonce_hash ; proof_of_work_nonce })
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(obj3
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(req "slot" mining_slot_encoding)
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(req "seed_nonce_hash" Nonce_hash.encoding)
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(req "proof_of_work_nonce" (Fixed.bytes Constants_repr.proof_of_work_nonce_size)))
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let signed_proto_header_encoding =
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let open Data_encoding in
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merge_objs
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proto_header_encoding
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(obj1 (req "signature" Ed25519.signature_encoding))
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let unsigned_header_encoding =
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let open Data_encoding in
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merge_objs
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Updater.shell_block_header_encoding
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proto_header_encoding
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(** Constants *)
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let max_header_length =
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match Data_encoding.classify signed_proto_header_encoding with
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| `Fixed n -> n
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| `Dynamic | `Variable -> assert false
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(** Header parsing entry point *)
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type error +=
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| Cant_parse_proto_header
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let parse_header
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({ shell = { net_id ; predecessor ; timestamp ; fitness ; operations } ;
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proto } : Updater.raw_block_header) : header tzresult =
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match Data_encoding.Binary.of_bytes signed_proto_header_encoding proto with
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| None -> Error [Cant_parse_proto_header]
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| Some (proto, signature) ->
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let shell =
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{ Updater.net_id ; predecessor ; timestamp ; fitness ; operations } in
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Ok { shell ; proto ; signature }
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let forge_header shell proto =
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Data_encoding.Binary.to_bytes unsigned_header_encoding (shell, proto)
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