nimbus-eth2/research/simutils.nim

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Nim
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import
stew/io2,
stats, os, strformat, times,
../tests/testblockutil,
../beacon_chain/beacon_chain_db,
../beacon_chain/spec/datatypes/[phase0, altair],
../beacon_chain/spec/[beaconstate, forks, helpers],
../beacon_chain/consensus_object_pools/[blockchain_dag, block_pools_types],
../beacon_chain/eth1/eth1_monitor
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: phase0.BeaconState, attesterRatio: auto) =
if attesterRatio < 0.63:
doAssert state.current_justified_checkpoint.epoch == 0
doAssert 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 state.current_justified_checkpoint.epoch + 1 >= current_epoch
if current_epoch >= 4:
doAssert state.finalized_checkpoint.epoch + 2 >= current_epoch
func verifyConsensus*(state: ForkedHashedBeaconState, attesterRatio: auto) =
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
proc loadGenesis*(validators: Natural, validate: bool):
(ref ForkedHashedBeaconState, DepositContractSnapshot) =
let
genesisFn =
&"genesis_{const_preset}_{validators}_{SPEC_VERSION}.ssz"
contractSnapshotFn =
&"deposit_contract_snapshot_{const_preset}_{validators}_{SPEC_VERSION}.ssz"
cfg = defaultRuntimeConfig
if fileExists(genesisFn) and fileExists(contractSnapshotFn):
let res = newClone(readSszForkedHashedBeaconState(
cfg, readAllBytes(genesisFn).tryGet()))
withState(res[]):
if state.data.slot != GENESIS_SLOT:
echo "Can only start from genesis state"
quit 1
if state.data.validators.len != validators:
echo &"Supplied genesis file has {state.data.validators.len} validators, while {validators} where requested, running anyway"
echo &"Loaded {genesisFn}..."
# TODO check that the private keys are interop keys
let contractSnapshot = SSZ.loadFile(contractSnapshotFn,
DepositContractSnapshot)
(res, contractSnapshot)
else:
echo "Genesis file not found, making one up (use nimbus_beacon_node createTestnet to make one)"
echo "Preparing validators..."
let
flags = if validate: {} else: {skipBlsValidation}
deposits = makeInitialDeposits(validators.uint64, flags)
echo "Generating Genesis..."
var merkleizer = init DepositsMerkleizer
for d in deposits:
merkleizer.addChunk hash_tree_root(d).data
let contractSnapshot = DepositContractSnapshot(
depositContractState: merkleizer.toDepositContractState)
let res = (ref ForkedHashedBeaconState)(
kind: BeaconStateFork.Phase0,
phase0Data: initialize_hashed_beacon_state_from_eth1(
cfg, Eth2Digest(), 0, deposits, flags))
echo &"Saving to {genesisFn}..."
SSZ.saveFile(genesisFn, res.phase0Data.data)
echo &"Saving to {contractSnapshotFn}..."
SSZ.saveFile(contractSnapshotFn, contractSnapshot)
(res, contractSnapshot)
proc printTimers*[Timers: enum](
validate: bool,
timers: array[Timers, RunningStat]
) =
func fmtTime(t: float): string = &"{t * 1000 :>12.3f}, "
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 meaning that 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
proc printTimers*[Timers: enum](
state: phase0.BeaconState, attesters: RunningStat, validate: bool,
timers: array[Timers, RunningStat]) =
echo "Validators: ", state.validators.len, ", epoch length: ", SLOTS_PER_EPOCH
echo "Validators per attestation (mean): ", attesters.mean
printTimers(validate, timers)
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)