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(*****************************************************************************)
(* *)
(* Open Source License *)
(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com> *)
(* *)
(* Permission is hereby granted, free of charge, to any person obtaining a *)
(* copy of this software and associated documentation files (the "Software"),*)
(* to deal in the Software without restriction, including without limitation *)
(* the rights to use, copy, modify, merge, publish, distribute, sublicense, *)
(* and/or sell copies of the Software, and to permit persons to whom the *)
(* Software is furnished to do so, subject to the following conditions: *)
(* *)
(* The above copyright notice and this permission notice shall be included *)
(* in all copies or substantial portions of the Software. *)
(* *)
(* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR*)
(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *)
(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *)
(* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER*)
(* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *)
(* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *)
(* DEALINGS IN THE SOFTWARE. *)
(* *)
(*****************************************************************************)
(** Block header *)
type t = {shell : Block_header.shell_header; protocol_data : protocol_data}
and protocol_data = {contents : contents; signature : Signature.t}
and contents = {
priority : int;
seed_nonce_hash : Nonce_hash.t option;
proof_of_work_nonce : MBytes.t;
}
type block_header = t
type raw = Block_header.t
type shell_header = Block_header.shell_header
let raw_encoding = Block_header.encoding
let shell_header_encoding = Block_header.shell_header_encoding
let contents_encoding =
let open Data_encoding in
def "block_header.alpha.unsigned_contents"
@@ conv
(fun {priority; seed_nonce_hash; proof_of_work_nonce} ->
(priority, proof_of_work_nonce, seed_nonce_hash))
(fun (priority, proof_of_work_nonce, seed_nonce_hash) ->
{priority; seed_nonce_hash; proof_of_work_nonce})
(obj3
(req "priority" uint16)
(req
"proof_of_work_nonce"
(Fixed.bytes Constants_repr.proof_of_work_nonce_size))
(opt "seed_nonce_hash" Nonce_hash.encoding))
let protocol_data_encoding =
let open Data_encoding in
def "block_header.alpha.signed_contents"
@@ conv
(fun {contents; signature} -> (contents, signature))
(fun (contents, signature) -> {contents; signature})
(merge_objs
contents_encoding
(obj1 (req "signature" Signature.encoding)))
let raw {shell; protocol_data} =
let protocol_data =
Data_encoding.Binary.to_bytes_exn protocol_data_encoding protocol_data
in
{Block_header.shell; protocol_data}
let unsigned_encoding =
let open Data_encoding in
merge_objs Block_header.shell_header_encoding contents_encoding
let encoding =
let open Data_encoding in
def "block_header.alpha.full_header"
@@ conv
(fun {shell; protocol_data} -> (shell, protocol_data))
(fun (shell, protocol_data) -> {shell; protocol_data})
(merge_objs Block_header.shell_header_encoding protocol_data_encoding)
(** Constants *)
let max_header_length =
let fake_shell =
{
Block_header.level = 0l;
proto_level = 0;
predecessor = Block_hash.zero;
timestamp = Time.of_seconds 0L;
validation_passes = 0;
operations_hash = Operation_list_list_hash.zero;
fitness = Fitness_repr.from_int64 0L;
context = Context_hash.zero;
}
and fake_contents =
{
priority = 0;
proof_of_work_nonce =
MBytes.create Constants_repr.proof_of_work_nonce_size;
seed_nonce_hash = Some Nonce_hash.zero;
}
in
Data_encoding.Binary.length
encoding
{
shell = fake_shell;
protocol_data = {contents = fake_contents; signature = Signature.zero};
}
(** Header parsing entry point *)
let hash_raw = Block_header.hash
let hash {shell; protocol_data} =
Block_header.hash
{
shell;
protocol_data =
Data_encoding.Binary.to_bytes_exn protocol_data_encoding protocol_data;
}