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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. *)
(* *)
(*****************************************************************************)
open Level_repr
let from_raw c ?offset l =
let l =
match offset with
| None ->
l
| Some o ->
Raw_level_repr.(of_int32_exn (Int32.add (to_int32 l) o))
in
let constants = Raw_context.constants c in
let first_level = Raw_context.first_level c in
Level_repr.from_raw
~first_level
~blocks_per_cycle:constants.Constants_repr.blocks_per_cycle
~blocks_per_voting_period:constants.Constants_repr.blocks_per_voting_period
~blocks_per_commitment:constants.Constants_repr.blocks_per_commitment
l
let root c = Level_repr.root (Raw_context.first_level c)
let succ c l = from_raw c (Raw_level_repr.succ l.level)
let pred c l =
match Raw_level_repr.pred l.Level_repr.level with
| None ->
None
| Some l ->
Some (from_raw c l)
let current ctxt = Raw_context.current_level ctxt
let previous ctxt =
let l = current ctxt in
match pred ctxt l with
| None ->
assert false (* We never validate the Genesis... *)
| Some p ->
p
let first_level_in_cycle ctxt c =
let constants = Raw_context.constants ctxt in
let first_level = Raw_context.first_level ctxt in
from_raw
ctxt
(Raw_level_repr.of_int32_exn
(Int32.add
(Raw_level_repr.to_int32 first_level)
(Int32.mul
constants.Constants_repr.blocks_per_cycle
(Cycle_repr.to_int32 c))))
let last_level_in_cycle ctxt c =
match pred ctxt (first_level_in_cycle ctxt (Cycle_repr.succ c)) with
| None ->
assert false
| Some x ->
x
let levels_in_cycle ctxt cycle =
let first = first_level_in_cycle ctxt cycle in
let rec loop n acc =
if Cycle_repr.(n.cycle = first.cycle) then loop (succ ctxt n) (n :: acc)
else acc
in
loop first []
let levels_in_current_cycle ctxt ?(offset = 0l) () =
let current_cycle = Cycle_repr.to_int32 (current ctxt).cycle in
let cycle = Int32.add current_cycle offset in
if Compare.Int32.(cycle < 0l) then []
else
let cycle = Cycle_repr.of_int32_exn cycle in
levels_in_cycle ctxt cycle
let levels_with_commitments_in_cycle ctxt c =
let first = first_level_in_cycle ctxt c in
let rec loop n acc =
if Cycle_repr.(n.cycle = first.cycle) then
if n.expected_commitment then loop (succ ctxt n) (n :: acc)
else loop (succ ctxt n) acc
else acc
in
loop first []
let last_allowed_fork_level c =
let level = Raw_context.current_level c in
let preserved_cycles = Constants_storage.preserved_cycles c in
match Cycle_repr.sub level.cycle preserved_cycles with
| None ->
Raw_level_repr.root
| Some cycle ->
(first_level_in_cycle c cycle).level