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add `start_slot` overload for sync periods (#3469) 

Adds a `start_slot` overload for `SyncCommitteePeriod` as a shortcut for
`period.start_epoch.start_slot`.
This commit is contained in:
Etan Kissling 2022-03-08 11:38:58 +01:00 committed by GitHub
parent 7340e7cab9
commit aaa5a5ad40
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2 changed files with 20 additions and 3 deletions
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8
beacon_chain/spec/beacon_time.nim
View File

@ -231,11 +231,19 @@ template is_sync_committee_period*(epoch: Epoch): bool =
epoch.since_sync_committee_period_start() == 0
template start_epoch*(period: SyncCommitteePeriod): Epoch =
## Return the start epoch of ``period``.
const maxPeriod = SyncCommitteePeriod(
FAR_FUTURE_EPOCH div EPOCHS_PER_SYNC_COMMITTEE_PERIOD)
if period >= maxPeriod: FAR_FUTURE_EPOCH
else: Epoch(period * EPOCHS_PER_SYNC_COMMITTEE_PERIOD)
template start_slot*(period: SyncCommitteePeriod): Slot =
## Return the start slot of ``period``.
const maxPeriod = SyncCommitteePeriod(
FAR_FUTURE_SLOT div SLOTS_PER_SYNC_COMMITTEE_PERIOD)
if period >= maxPeriod: FAR_FUTURE_SLOT
else: Slot(period * SLOTS_PER_SYNC_COMMITTEE_PERIOD)
func `$`*(t: BeaconTime): string =
if t.ns_since_genesis >= 0:
$(timer.nanoseconds(t.ns_since_genesis))

15
tests/test_beacon_time.nim
View File

@ -1,12 +1,16 @@
# beacon_chain
# Copyright (c) 2022 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
{.used.}
import
unittest2,
../beacon_chain/spec/beacon_time
{.used.}
suite "Beacon time":
test "basics":
let
@ -19,9 +23,11 @@ suite "Beacon time":
# Roundtrip far times we treat these as "Infinitiy"
FAR_FUTURE_SLOT.epoch.start_slot() == FAR_FUTURE_SLOT
FAR_FUTURE_SLOT.sync_committee_period.start_slot() == FAR_FUTURE_SLOT
FAR_FUTURE_EPOCH.start_slot().epoch() == FAR_FUTURE_EPOCH
FAR_FUTURE_SLOT.start_beacon_time().slotOrZero() == FAR_FUTURE_SLOT
FAR_FUTURE_PERIOD.start_epoch().sync_committee_period() == FAR_FUTURE_PERIOD
FAR_FUTURE_PERIOD.start_slot().sync_committee_period() == FAR_FUTURE_PERIOD
BeaconTime(ns_since_genesis: -10000000000).slotOrZero == Slot(0)
Slot(5).since_epoch_start() == 5
@ -35,6 +41,9 @@ suite "Beacon time":
Epoch(3).start_slot.is_epoch()
SyncCommitteePeriod(5).start_epoch().is_sync_committee_period()
SyncCommitteePeriod(5).start_slot().is_sync_committee_period()
Epoch(5).start_slot.sync_committee_period ==
Epoch(5).sync_committee_period
SyncCommitteePeriod(5).start_slot.sync_committee_period ==
SyncCommitteePeriod(5)