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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. *)
(* *)
(*****************************************************************************)
type t = {
level : Raw_level_repr.t;
level_position : int32;
cycle : Cycle_repr.t;
cycle_position : int32;
voting_period : Voting_period_repr.t;
voting_period_position : int32;
expected_commitment : bool;
}
include Compare.Make (struct
type nonrec t = t
let compare {level = l1} {level = l2} = Raw_level_repr.compare l1 l2
end)
type level = t
let pp ppf {level} = Raw_level_repr.pp ppf level
let pp_full ppf l =
Format.fprintf
ppf
"%a.%ld (cycle %a.%ld) (vote %a.%ld)"
Raw_level_repr.pp
l.level
l.level_position
Cycle_repr.pp
l.cycle
l.cycle_position
Voting_period_repr.pp
l.voting_period
l.voting_period_position
let encoding =
let open Data_encoding in
conv
(fun { level;
level_position;
cycle;
cycle_position;
voting_period;
voting_period_position;
expected_commitment } ->
( level,
level_position,
cycle,
cycle_position,
voting_period,
voting_period_position,
expected_commitment ))
(fun ( level,
level_position,
cycle,
cycle_position,
voting_period,
voting_period_position,
expected_commitment ) ->
{
level;
level_position;
cycle;
cycle_position;
voting_period;
voting_period_position;
expected_commitment;
})
(obj7
(req
"level"
~description:
"The level of the block relative to genesis. This is also the \
Shell's notion of level"
Raw_level_repr.encoding)
(req
"level_position"
~description:
"The level of the block relative to the block that starts \
protocol alpha. This is specific to the protocol alpha. Other \
protocols might or might not include a similar notion."
int32)
(req
"cycle"
~description:
"The current cycle's number. Note that cycles are a \
protocol-specific notion. As a result, the cycle number starts \
at 0 with the first block of protocol alpha."
Cycle_repr.encoding)
(req
"cycle_position"
~description:
"The current level of the block relative to the first block of \
the current cycle."
int32)
(req
"voting_period"
~description:
"The current voting period's index. Note that cycles are a \
protocol-specific notion. As a result, the voting period index \
starts at 0 with the first block of protocol alpha."
Voting_period_repr.encoding)
(req
"voting_period_position"
~description:
"The current level of the block relative to the first block of \
the current voting period."
int32)
(req
"expected_commitment"
~description:
"Tells wether the baker of this block has to commit a seed nonce \
hash."
bool))
let root first_level =
{
level = first_level;
level_position = 0l;
cycle = Cycle_repr.root;
cycle_position = 0l;
voting_period = Voting_period_repr.root;
voting_period_position = 0l;
expected_commitment = false;
}
let from_raw ~first_level ~blocks_per_cycle ~blocks_per_voting_period
~blocks_per_commitment level =
let raw_level = Raw_level_repr.to_int32 level in
let first_level = Raw_level_repr.to_int32 first_level in
let level_position =
Compare.Int32.max 0l (Int32.sub raw_level first_level)
in
let cycle =
Cycle_repr.of_int32_exn (Int32.div level_position blocks_per_cycle)
in
let cycle_position = Int32.rem level_position blocks_per_cycle in
let voting_period =
Voting_period_repr.of_int32_exn
(Int32.div level_position blocks_per_voting_period)
in
let voting_period_position =
Int32.rem level_position blocks_per_voting_period
in
let expected_commitment =
Compare.Int32.(
Int32.rem cycle_position blocks_per_commitment
= Int32.pred blocks_per_commitment)
in
{
level;
level_position;
cycle;
cycle_position;
voting_period;
voting_period_position;
expected_commitment;
}
let diff {level = l1; _} {level = l2; _} =
Int32.sub (Raw_level_repr.to_int32 l1) (Raw_level_repr.to_int32 l2)