mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2024-12-25 12:57:18 +00:00
af3d3e8cd3
* add in more accurate aggregate parameters * add more param changes * more cleanup * fix order of operations * comments * remove redundant declaration * clean up better * fix up * victor's review * disable mesh scoring * disable mesh scoring Co-authored-by: Raul Jordan <raul@prysmaticlabs.com> Co-authored-by: Victor Farazdagi <simple.square@gmail.com>
406 lines
15 KiB
Go
406 lines
15 KiB
Go
package p2p
|
|
|
|
import (
|
|
"math"
|
|
"reflect"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/libp2p/go-libp2p-core/peer"
|
|
pubsub "github.com/libp2p/go-libp2p-pubsub"
|
|
"github.com/pkg/errors"
|
|
"github.com/prysmaticlabs/prysm/beacon-chain/core/helpers"
|
|
"github.com/prysmaticlabs/prysm/shared/params"
|
|
"github.com/sirupsen/logrus"
|
|
)
|
|
|
|
const (
|
|
// beaconBlockWeight specifies the scoring weight that we apply to
|
|
// our beacon block topic.
|
|
beaconBlockWeight = 0.8
|
|
// aggregateWeight specifies the scoring weight that we apply to
|
|
// our aggregate topic.
|
|
aggregateWeight = 0.5
|
|
// attestationTotalWeight specifies the scoring weight that we apply to
|
|
// our attestation subnet topic.
|
|
attestationTotalWeight = 1
|
|
// attesterSlashingWeight specifies the scoring weight that we apply to
|
|
// our attester slashing topic.
|
|
attesterSlashingWeight = 0.05
|
|
// proposerSlashingWeight specifies the scoring weight that we apply to
|
|
// our proposer slashing topic.
|
|
proposerSlashingWeight = 0.05
|
|
// voluntaryExitWeight specifies the scoring weight that we apply to
|
|
// our voluntary exit topic.
|
|
voluntaryExitWeight = 0.05
|
|
|
|
// maxInMeshScore describes the max score a peer can attain from being in the mesh.
|
|
maxInMeshScore = 10
|
|
// maxFirstDeliveryScore describes the max score a peer can obtain from first deliveries.
|
|
maxFirstDeliveryScore = 40
|
|
|
|
// decayToZero specifies the terminal value that we will use when decaying
|
|
// a value.
|
|
decayToZero = 0.01
|
|
|
|
// dampeningFactor reduces the amount by which the various thresholds and caps are created.
|
|
dampeningFactor = 90
|
|
)
|
|
|
|
var (
|
|
// a bool to check if we enable scoring for messages in the mesh sent for near first deliveries.
|
|
meshDeliveryIsScored = false
|
|
)
|
|
|
|
func peerScoringParams() (*pubsub.PeerScoreParams, *pubsub.PeerScoreThresholds) {
|
|
thresholds := &pubsub.PeerScoreThresholds{
|
|
GossipThreshold: -4000,
|
|
PublishThreshold: -8000,
|
|
GraylistThreshold: -16000,
|
|
AcceptPXThreshold: 100,
|
|
OpportunisticGraftThreshold: 5,
|
|
}
|
|
scoreParams := &pubsub.PeerScoreParams{
|
|
Topics: make(map[string]*pubsub.TopicScoreParams),
|
|
TopicScoreCap: 32.72,
|
|
AppSpecificScore: func(p peer.ID) float64 {
|
|
return 0
|
|
},
|
|
AppSpecificWeight: 1,
|
|
IPColocationFactorWeight: -35.11,
|
|
IPColocationFactorThreshold: 10,
|
|
IPColocationFactorWhitelist: nil,
|
|
BehaviourPenaltyWeight: -15.92,
|
|
BehaviourPenaltyThreshold: 6,
|
|
BehaviourPenaltyDecay: scoreDecay(10 * oneEpochDuration()),
|
|
DecayInterval: 1 * oneSlotDuration(),
|
|
DecayToZero: decayToZero,
|
|
RetainScore: 100 * oneEpochDuration(),
|
|
}
|
|
return scoreParams, thresholds
|
|
}
|
|
|
|
func (s *Service) topicScoreParams(topic string) (*pubsub.TopicScoreParams, error) {
|
|
activeValidators, err := s.retrieveActiveValidators()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
switch {
|
|
case strings.Contains(topic, "beacon_block"):
|
|
return defaultBlockTopicParams(), nil
|
|
case strings.Contains(topic, "beacon_aggregate_and_proof"):
|
|
return defaultAggregateTopicParams(activeValidators)
|
|
case strings.Contains(topic, "beacon_attestation"):
|
|
return defaultAggregateSubnetTopicParams(activeValidators)
|
|
case strings.Contains(topic, "voluntary_exit"):
|
|
return defaultVoluntaryExitTopicParams(), nil
|
|
case strings.Contains(topic, "proposer_slashing"):
|
|
return defaultProposerSlashingTopicParams(), nil
|
|
case strings.Contains(topic, "attester_slashing"):
|
|
return defaultAttesterSlashingTopicParams(), nil
|
|
default:
|
|
return nil, errors.Errorf("unrecognized topic provided for parameter registration: %s", topic)
|
|
}
|
|
}
|
|
|
|
func (s *Service) retrieveActiveValidators() (uint64, error) {
|
|
rt := s.cfg.DB.LastArchivedRoot(s.ctx)
|
|
if rt == params.BeaconConfig().ZeroHash {
|
|
genState, err := s.cfg.DB.GenesisState(s.ctx)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
if genState == nil {
|
|
return 0, errors.New("no genesis state exists")
|
|
}
|
|
return helpers.ActiveValidatorCount(genState, helpers.CurrentEpoch(genState))
|
|
}
|
|
bState, err := s.cfg.DB.State(s.ctx, rt)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
if bState == nil {
|
|
return 0, errors.Errorf("no state with root %#x exists", rt)
|
|
}
|
|
return helpers.ActiveValidatorCount(bState, helpers.CurrentEpoch(bState))
|
|
}
|
|
|
|
// Based on the lighthouse parameters.
|
|
// https://gist.github.com/blacktemplar/5c1862cb3f0e32a1a7fb0b25e79e6e2c
|
|
|
|
func defaultBlockTopicParams() *pubsub.TopicScoreParams {
|
|
decayEpoch := time.Duration(5)
|
|
blocksPerEpoch := uint64(params.BeaconConfig().SlotsPerEpoch)
|
|
meshWeight := -0.717
|
|
if !meshDeliveryIsScored {
|
|
// Set the mesh weight as zero as a temporary measure, so as to prevent
|
|
// the average nodes from being penalised.
|
|
meshWeight = 0
|
|
}
|
|
return &pubsub.TopicScoreParams{
|
|
TopicWeight: beaconBlockWeight,
|
|
TimeInMeshWeight: maxInMeshScore / inMeshCap(),
|
|
TimeInMeshQuantum: inMeshTime(),
|
|
TimeInMeshCap: inMeshCap(),
|
|
FirstMessageDeliveriesWeight: 1,
|
|
FirstMessageDeliveriesDecay: scoreDecay(20 * oneEpochDuration()),
|
|
FirstMessageDeliveriesCap: 23,
|
|
MeshMessageDeliveriesWeight: meshWeight,
|
|
MeshMessageDeliveriesDecay: scoreDecay(decayEpoch * oneEpochDuration()),
|
|
MeshMessageDeliveriesCap: float64(blocksPerEpoch * uint64(decayEpoch)),
|
|
MeshMessageDeliveriesThreshold: float64(blocksPerEpoch*uint64(decayEpoch)) / 10,
|
|
MeshMessageDeliveriesWindow: 2 * time.Second,
|
|
MeshMessageDeliveriesActivation: 4 * oneEpochDuration(),
|
|
MeshFailurePenaltyWeight: meshWeight,
|
|
MeshFailurePenaltyDecay: scoreDecay(decayEpoch * oneEpochDuration()),
|
|
InvalidMessageDeliveriesWeight: -140.4475,
|
|
InvalidMessageDeliveriesDecay: scoreDecay(50 * oneEpochDuration()),
|
|
}
|
|
}
|
|
|
|
func defaultAggregateTopicParams(activeValidators uint64) (*pubsub.TopicScoreParams, error) {
|
|
// Determine the expected message rate for the particular gossip topic.
|
|
aggPerSlot := aggregatorsPerSlot(activeValidators)
|
|
firstMessageCap, err := decayLimit(scoreDecay(1*oneEpochDuration()), float64(aggPerSlot*2/gossipSubD))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
firstMessageWeight := maxFirstDeliveryScore / firstMessageCap
|
|
meshThreshold, err := decayThreshold(scoreDecay(1*oneEpochDuration()), float64(aggPerSlot)/dampeningFactor)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
meshWeight := -scoreByWeight(aggregateWeight, meshThreshold)
|
|
meshCap := 4 * meshThreshold
|
|
if !meshDeliveryIsScored {
|
|
// Set the mesh weight as zero as a temporary measure, so as to prevent
|
|
// the average nodes from being penalised.
|
|
meshWeight = 0
|
|
}
|
|
return &pubsub.TopicScoreParams{
|
|
TopicWeight: aggregateWeight,
|
|
TimeInMeshWeight: maxInMeshScore / inMeshCap(),
|
|
TimeInMeshQuantum: inMeshTime(),
|
|
TimeInMeshCap: inMeshCap(),
|
|
FirstMessageDeliveriesWeight: firstMessageWeight,
|
|
FirstMessageDeliveriesDecay: scoreDecay(1 * oneEpochDuration()),
|
|
FirstMessageDeliveriesCap: firstMessageCap,
|
|
MeshMessageDeliveriesWeight: meshWeight,
|
|
MeshMessageDeliveriesDecay: scoreDecay(1 * oneEpochDuration()),
|
|
MeshMessageDeliveriesCap: meshCap,
|
|
MeshMessageDeliveriesThreshold: meshThreshold,
|
|
MeshMessageDeliveriesWindow: 2 * time.Second,
|
|
MeshMessageDeliveriesActivation: 1 * oneEpochDuration(),
|
|
MeshFailurePenaltyWeight: meshWeight,
|
|
MeshFailurePenaltyDecay: scoreDecay(1 * oneEpochDuration()),
|
|
InvalidMessageDeliveriesWeight: -maxScore() / aggregateWeight,
|
|
InvalidMessageDeliveriesDecay: scoreDecay(50 * oneEpochDuration()),
|
|
}, nil
|
|
}
|
|
|
|
func defaultAggregateSubnetTopicParams(activeValidators uint64) (*pubsub.TopicScoreParams, error) {
|
|
subnetCount := params.BeaconNetworkConfig().AttestationSubnetCount
|
|
// Get weight for each specific subnet.
|
|
topicWeight := attestationTotalWeight / float64(subnetCount)
|
|
subnetWeight := activeValidators / subnetCount
|
|
// Determine the amount of validators expected in a subnet in a single slot.
|
|
numPerSlot := time.Duration(subnetWeight / uint64(params.BeaconConfig().SlotsPerEpoch))
|
|
comsPerSlot := committeeCountPerSlot(activeValidators)
|
|
exceedsThreshold := comsPerSlot >= 2*subnetCount/uint64(params.BeaconConfig().SlotsPerEpoch)
|
|
firstDecay := time.Duration(1)
|
|
meshDecay := time.Duration(4)
|
|
if exceedsThreshold {
|
|
firstDecay = 4
|
|
meshDecay = 16
|
|
}
|
|
// Determine expected first deliveries based on the message rate.
|
|
firstMessageCap, err := decayLimit(scoreDecay(firstDecay*oneEpochDuration()), float64(numPerSlot*2/gossipSubD))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
firstMessageWeight := maxFirstDeliveryScore / firstMessageCap
|
|
// Determine expected mesh deliveries based on message rate applied with a dampening factor.
|
|
meshThreshold, err := decayThreshold(scoreDecay(meshDecay*oneEpochDuration()), float64(numPerSlot)/dampeningFactor)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
meshWeight := -scoreByWeight(topicWeight, meshThreshold)
|
|
meshCap := 4 * meshThreshold
|
|
if !meshDeliveryIsScored {
|
|
// Set the mesh weight as zero as a temporary measure, so as to prevent
|
|
// the average nodes from being penalised.
|
|
meshWeight = 0
|
|
}
|
|
return &pubsub.TopicScoreParams{
|
|
TopicWeight: topicWeight,
|
|
TimeInMeshWeight: maxInMeshScore / inMeshCap(),
|
|
TimeInMeshQuantum: inMeshTime(),
|
|
TimeInMeshCap: inMeshCap(),
|
|
FirstMessageDeliveriesWeight: firstMessageWeight,
|
|
FirstMessageDeliveriesDecay: scoreDecay(firstDecay * oneEpochDuration()),
|
|
FirstMessageDeliveriesCap: firstMessageCap,
|
|
MeshMessageDeliveriesWeight: meshWeight,
|
|
MeshMessageDeliveriesDecay: scoreDecay(meshDecay * oneEpochDuration()),
|
|
MeshMessageDeliveriesCap: meshCap,
|
|
MeshMessageDeliveriesThreshold: meshThreshold,
|
|
MeshMessageDeliveriesWindow: 2 * time.Second,
|
|
MeshMessageDeliveriesActivation: 1 * oneEpochDuration(),
|
|
MeshFailurePenaltyWeight: meshWeight,
|
|
MeshFailurePenaltyDecay: scoreDecay(meshDecay * oneEpochDuration()),
|
|
InvalidMessageDeliveriesWeight: -maxScore() / topicWeight,
|
|
InvalidMessageDeliveriesDecay: scoreDecay(50 * oneEpochDuration()),
|
|
}, nil
|
|
}
|
|
|
|
func defaultAttesterSlashingTopicParams() *pubsub.TopicScoreParams {
|
|
return &pubsub.TopicScoreParams{
|
|
TopicWeight: attesterSlashingWeight,
|
|
TimeInMeshWeight: maxInMeshScore / inMeshCap(),
|
|
TimeInMeshQuantum: inMeshTime(),
|
|
TimeInMeshCap: inMeshCap(),
|
|
FirstMessageDeliveriesWeight: 36,
|
|
FirstMessageDeliveriesDecay: scoreDecay(100 * oneEpochDuration()),
|
|
FirstMessageDeliveriesCap: 1,
|
|
MeshMessageDeliveriesWeight: 0,
|
|
MeshMessageDeliveriesDecay: 0,
|
|
MeshMessageDeliveriesCap: 0,
|
|
MeshMessageDeliveriesThreshold: 0,
|
|
MeshMessageDeliveriesWindow: 0,
|
|
MeshMessageDeliveriesActivation: 0,
|
|
MeshFailurePenaltyWeight: 0,
|
|
MeshFailurePenaltyDecay: 0,
|
|
InvalidMessageDeliveriesWeight: -2000,
|
|
InvalidMessageDeliveriesDecay: scoreDecay(50 * oneEpochDuration()),
|
|
}
|
|
}
|
|
|
|
func defaultProposerSlashingTopicParams() *pubsub.TopicScoreParams {
|
|
return &pubsub.TopicScoreParams{
|
|
TopicWeight: proposerSlashingWeight,
|
|
TimeInMeshWeight: maxInMeshScore / inMeshCap(),
|
|
TimeInMeshQuantum: inMeshTime(),
|
|
TimeInMeshCap: inMeshCap(),
|
|
FirstMessageDeliveriesWeight: 36,
|
|
FirstMessageDeliveriesDecay: scoreDecay(100 * oneEpochDuration()),
|
|
FirstMessageDeliveriesCap: 1,
|
|
MeshMessageDeliveriesWeight: 0,
|
|
MeshMessageDeliveriesDecay: 0,
|
|
MeshMessageDeliveriesCap: 0,
|
|
MeshMessageDeliveriesThreshold: 0,
|
|
MeshMessageDeliveriesWindow: 0,
|
|
MeshMessageDeliveriesActivation: 0,
|
|
MeshFailurePenaltyWeight: 0,
|
|
MeshFailurePenaltyDecay: 0,
|
|
InvalidMessageDeliveriesWeight: -2000,
|
|
InvalidMessageDeliveriesDecay: scoreDecay(50 * oneEpochDuration()),
|
|
}
|
|
}
|
|
|
|
func defaultVoluntaryExitTopicParams() *pubsub.TopicScoreParams {
|
|
return &pubsub.TopicScoreParams{
|
|
TopicWeight: voluntaryExitWeight,
|
|
TimeInMeshWeight: maxInMeshScore / inMeshCap(),
|
|
TimeInMeshQuantum: inMeshTime(),
|
|
TimeInMeshCap: inMeshCap(),
|
|
FirstMessageDeliveriesWeight: 2,
|
|
FirstMessageDeliveriesDecay: scoreDecay(100 * oneEpochDuration()),
|
|
FirstMessageDeliveriesCap: 5,
|
|
MeshMessageDeliveriesWeight: 0,
|
|
MeshMessageDeliveriesDecay: 0,
|
|
MeshMessageDeliveriesCap: 0,
|
|
MeshMessageDeliveriesThreshold: 0,
|
|
MeshMessageDeliveriesWindow: 0,
|
|
MeshMessageDeliveriesActivation: 0,
|
|
MeshFailurePenaltyWeight: 0,
|
|
MeshFailurePenaltyDecay: 0,
|
|
InvalidMessageDeliveriesWeight: -2000,
|
|
InvalidMessageDeliveriesDecay: scoreDecay(50 * oneEpochDuration()),
|
|
}
|
|
}
|
|
|
|
func oneSlotDuration() time.Duration {
|
|
return time.Duration(params.BeaconConfig().SecondsPerSlot) * time.Second
|
|
}
|
|
|
|
func oneEpochDuration() time.Duration {
|
|
return time.Duration(params.BeaconConfig().SlotsPerEpoch) * oneSlotDuration()
|
|
}
|
|
|
|
// determines the decay rate from the provided time period till
|
|
// the decayToZero value. Ex: ( 1 -> 0.01)
|
|
func scoreDecay(totalDurationDecay time.Duration) float64 {
|
|
numOfTimes := totalDurationDecay / oneSlotDuration()
|
|
return math.Pow(decayToZero, 1/float64(numOfTimes))
|
|
}
|
|
|
|
// is used to determine the threshold from the decay limit with
|
|
// a provided growth rate. This applies the decay rate to a
|
|
// computed limit.
|
|
func decayThreshold(decayRate, rate float64) (float64, error) {
|
|
d, err := decayLimit(decayRate, rate)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return d * decayRate, nil
|
|
}
|
|
|
|
// decayLimit provides the value till which a decay process will
|
|
// limit till provided with an expected growth rate.
|
|
func decayLimit(decayRate, rate float64) (float64, error) {
|
|
if 1 <= decayRate {
|
|
return 0, errors.Errorf("got an invalid decayLimit rate: %f", decayRate)
|
|
}
|
|
return rate / (1 - decayRate), nil
|
|
}
|
|
|
|
func committeeCountPerSlot(activeValidators uint64) uint64 {
|
|
// Use a static parameter for now rather than a dynamic one, we can use
|
|
// the actual parameter later when we have figured out how to fix a circular
|
|
// dependency in service startup order.
|
|
return helpers.SlotCommitteeCount(activeValidators)
|
|
}
|
|
|
|
// Uses a very rough gauge for total aggregator size per slot.
|
|
func aggregatorsPerSlot(activeValidators uint64) uint64 {
|
|
comms := committeeCountPerSlot(activeValidators)
|
|
totalAggs := comms * params.BeaconConfig().TargetAggregatorsPerCommittee
|
|
return totalAggs
|
|
}
|
|
|
|
// provides the relevant score by the provided weight and threshold.
|
|
func scoreByWeight(weight float64, threshold float64) float64 {
|
|
return maxScore() / (weight * threshold * threshold)
|
|
}
|
|
|
|
// maxScore attainable by a peer.
|
|
func maxScore() float64 {
|
|
totalWeight := beaconBlockWeight + aggregateWeight + attestationTotalWeight +
|
|
attesterSlashingWeight + proposerSlashingWeight + voluntaryExitWeight
|
|
return (maxInMeshScore + maxFirstDeliveryScore) * totalWeight
|
|
}
|
|
|
|
// denotes the unit time in mesh for scoring tallying.
|
|
func inMeshTime() time.Duration {
|
|
return 1 * oneSlotDuration()
|
|
}
|
|
|
|
// the cap for `inMesh` time scoring.
|
|
func inMeshCap() float64 {
|
|
return float64((3600 * time.Second) / inMeshTime())
|
|
}
|
|
|
|
func logGossipParameters(topic string, params *pubsub.TopicScoreParams) {
|
|
// Exit early in the event the parameter struct is nil.
|
|
if params == nil {
|
|
return
|
|
}
|
|
rawParams := reflect.ValueOf(params).Elem()
|
|
numOfFields := rawParams.NumField()
|
|
|
|
fields := make(logrus.Fields, numOfFields)
|
|
for i := 0; i < numOfFields; i++ {
|
|
fields[reflect.TypeOf(params).Elem().Field(i).Name] = rawParams.Field(i).Interface()
|
|
}
|
|
log.WithFields(fields).Debugf("Topic Parameters for %s", topic)
|
|
}
|