nimbus-eth2/research/simutils.nim

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# beacon_chain
# Copyright (c) 2020-2024 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.
{.push raises: [].}
import
stew/io2,
../tests/testblockutil, ../tests/consensus_spec/os_ops,
../beacon_chain/spec/[beaconstate, forks]
from std/stats import RunningStat, mean, push, standardDeviationS
from std/strformat import `&`
from std/times import cpuTime
from ../beacon_chain/filepath import secureCreatePath
from ../beacon_chain/spec/deposit_snapshots import DepositTreeSnapshot
template withTimer*(stats: var RunningStat, body: untyped) =
# TODO unify timing somehow
let start = cpuTime()
block:
body
let stop = cpuTime()
stats.push stop - start
template withTimerRet*(stats: var RunningStat, body: untyped): untyped =
let start = cpuTime()
let tmp = block:
body
let stop = cpuTime()
stats.push stop - start
tmp
func verifyConsensus*(state: ForkedHashedBeaconState, attesterRatio: float) =
if attesterRatio < 0.63:
doAssert getStateField(state, current_justified_checkpoint).epoch == 0
doAssert getStateField(state, finalized_checkpoint).epoch == 0
# Quorum is 2/3 of validators, and at low numbers, quantization effects
# can dominate, so allow for play above/below attesterRatio of 2/3.
if attesterRatio < 0.72:
return
let current_epoch = get_current_epoch(state)
if current_epoch >= 3:
doAssert getStateField(
state, current_justified_checkpoint).epoch + 1 >= current_epoch
if current_epoch >= 4:
doAssert getStateField(
state, finalized_checkpoint).epoch + 2 >= current_epoch
func getSimulationConfig*(): RuntimeConfig {.compileTime.} =
var cfg = defaultRuntimeConfig
cfg.ALTAIR_FORK_EPOCH = 0.Epoch
cfg.BELLATRIX_FORK_EPOCH = 0.Epoch
cfg.CAPELLA_FORK_EPOCH = 0.Epoch
cfg.DENEB_FORK_EPOCH = 2.Epoch
cfg
proc loadGenesis*(validators: Natural, validate: bool):
(ref ForkedHashedBeaconState, DepositTreeSnapshot) =
const genesisDir = "test_sim"
if (let res = secureCreatePath(genesisDir); res.isErr):
fatal "Could not create directory",
path = genesisDir, err = ioErrorMsg(res.error)
quit 1
let
suffix = const_preset & "_" & $validators & "_" & SPEC_VERSION
genesisFn = genesisDir /
"genesis_" & suffix & ".ssz"
contractSnapshotFn = genesisDir /
"deposit_contract_snapshot_" & suffix & ".ssz"
const cfg = getSimulationConfig()
if fileExists(genesisFn) and fileExists(contractSnapshotFn):
let res =
try:
newClone(readSszForkedHashedBeaconState(
cfg, readAllBytes(genesisFn).tryGet()))
except ResultError[IoErrorCode] as exc:
fatal "Genesis file failed to load",
fileName = genesisFn, exc = exc.msg
quit 1
except SerializationError as exc:
fatal "Genesis file malformed",
fileName = genesisFn, exc = exc.msg
quit 1
withState(res[]):
if forkyState.data.slot != GENESIS_SLOT:
fatal "Can only start from genesis state"
quit 1
if forkyState.data.validators.len != validators:
fatal "Supplied genesis file has unexpected number of validators",
numExpectedValidators = validators,
numActualValidators = forkyState.data.validators.len
quit 1
info "Loaded genesis file", fileName = genesisFn
# TODO check that the private keys are EF test keys
let contractSnapshot =
try:
SSZ.loadFile(contractSnapshotFn, DepositTreeSnapshot)
except IOError as exc:
fatal "Deposit contract snapshot failed to load",
fileName = contractSnapshotFn, exc = exc.msg
quit 1
except SerializationError as exc:
fatal "Deposit contract snapshot malformed",
fileName = contractSnapshotFn, exc = exc.msg
quit 1
(res, contractSnapshot)
else:
warn "Genesis file not found, making one up",
hint = "use nimbus_beacon_node createTestnet to make one"
info "Preparing validators..."
let
flags = if validate: {} else: {skipBlsValidation}
deposits = makeInitialDeposits(validators.uint64, flags)
info "Generating Genesis..."
var merkleizer = init DepositsMerkleizer
for d in deposits:
merkleizer.addChunk hash_tree_root(d).data
let contractSnapshot = DepositTreeSnapshot(
depositContractState: merkleizer.toDepositContractState)
let res = (ref ForkedHashedBeaconState)(
kind: ConsensusFork.Capella,
capellaData: capella.HashedBeaconState(
data: initialize_beacon_state_from_eth1(
cfg, ZERO_HASH, 0, deposits,
default(capella.ExecutionPayloadHeader), {skipBlsValidation})))
info "Saving genesis file", fileName = genesisFn
try:
SSZ.saveFile(genesisFn, res.capellaData.data)
except IOError as exc:
fatal "Genesis file failed to save",
fileName = genesisFn, exc = exc.msg
quit 1
info "Saving deposit contract snapshot", fileName = contractSnapshotFn
try:
SSZ.saveFile(contractSnapshotFn, contractSnapshot)
except IOError as exc:
fatal "Deposit contract snapshot failed to save",
fileName = contractSnapshotFn, exc = exc.msg
quit 1
(res, contractSnapshot)
proc printTimers*[Timers: enum](
validate: bool,
timers: array[Timers, RunningStat]) =
func fmtTime(t: float): string =
try:
&"{t * 1000 :>12.3f}, "
except ValueError as exc:
raiseAssert "formatValue failed unexpectedly: " & $exc.msg
try:
echo "All time are ms"
echo &"{\"Average\" :>12}, {\"StdDev\" :>12}, {\"Min\" :>12}, " &
&"{\"Max\" :>12}, {\"Samples\" :>12}, {\"Test\" :>12}"
if not validate:
echo "Validation is turned off; no BLS operations are performed"
for t in Timers:
echo fmtTime(timers[t].mean), fmtTime(timers[t].standardDeviationS),
fmtTime(timers[t].min), fmtTime(timers[t].max), &"{timers[t].n :>12}, ",
$t
except ValueError as exc:
raiseAssert "formatValue failed unexpectedly: " & $exc.msg
proc printTimers*[Timers: enum](
state: ForkedHashedBeaconState, attesters: RunningStat, validate: bool,
timers: array[Timers, RunningStat]) =
echo "Validators: ", getStateField(state, validators).len,
", epoch length: ", SLOTS_PER_EPOCH
echo "Validators per attestation (mean): ", attesters.mean
printTimers(validate, timers)