663 lines
20 KiB
Go
663 lines
20 KiB
Go
package lp2p
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import (
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"context"
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"encoding/json"
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"net"
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"time"
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pubsub "github.com/libp2p/go-libp2p-pubsub"
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pubsub_pb "github.com/libp2p/go-libp2p-pubsub/pb"
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"github.com/libp2p/go-libp2p/core/host"
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"github.com/libp2p/go-libp2p/core/peer"
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"github.com/minio/blake2b-simd"
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ma "github.com/multiformats/go-multiaddr"
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"go.opencensus.io/stats"
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"go.uber.org/fx"
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"golang.org/x/xerrors"
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"github.com/filecoin-project/lotus/build"
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"github.com/filecoin-project/lotus/metrics"
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"github.com/filecoin-project/lotus/node/config"
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"github.com/filecoin-project/lotus/node/modules/dtypes"
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"github.com/filecoin-project/lotus/node/modules/helpers"
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"github.com/filecoin-project/lotus/node/modules/tracer"
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)
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func init() {
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// configure larger overlay parameters
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pubsub.GossipSubD = 8
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pubsub.GossipSubDscore = 6
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pubsub.GossipSubDout = 3
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pubsub.GossipSubDlo = 6
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pubsub.GossipSubDhi = 12
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pubsub.GossipSubDlazy = 12
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pubsub.GossipSubDirectConnectInitialDelay = 30 * time.Second
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pubsub.GossipSubIWantFollowupTime = 5 * time.Second
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pubsub.GossipSubHistoryLength = 10
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pubsub.GossipSubGossipFactor = 0.1
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}
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const (
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GossipScoreThreshold = -500
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PublishScoreThreshold = -1000
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GraylistScoreThreshold = -2500
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AcceptPXScoreThreshold = 1000
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OpportunisticGraftScoreThreshold = 3.5
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)
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func ScoreKeeper() *dtypes.ScoreKeeper {
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return new(dtypes.ScoreKeeper)
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}
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type PeerScoreTracker interface {
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UpdatePeerScore(scores map[peer.ID]*pubsub.PeerScoreSnapshot)
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}
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type peerScoreTracker struct {
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sk *dtypes.ScoreKeeper
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lt tracer.LotusTracer
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}
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func newPeerScoreTracker(lt tracer.LotusTracer, sk *dtypes.ScoreKeeper) PeerScoreTracker {
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return &peerScoreTracker{
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sk: sk,
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lt: lt,
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}
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}
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func (pst *peerScoreTracker) UpdatePeerScore(scores map[peer.ID]*pubsub.PeerScoreSnapshot) {
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if pst.lt != nil {
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pst.lt.PeerScores(scores)
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}
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pst.sk.Update(scores)
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}
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type GossipIn struct {
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fx.In
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Mctx helpers.MetricsCtx
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Lc fx.Lifecycle
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Host host.Host
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Nn dtypes.NetworkName
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Bp dtypes.BootstrapPeers
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Db dtypes.DrandBootstrap
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Cfg *config.Pubsub
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Sk *dtypes.ScoreKeeper
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Dr dtypes.DrandSchedule
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}
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func getDrandTopic(chainInfoJSON string) (string, error) {
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var drandInfo = struct {
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Hash string `json:"hash"`
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}{}
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err := json.Unmarshal([]byte(chainInfoJSON), &drandInfo)
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if err != nil {
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return "", xerrors.Errorf("could not unmarshal drand chain info: %w", err)
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}
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return "/drand/pubsub/v0.0.0/" + drandInfo.Hash, nil
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}
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func GossipSub(in GossipIn) (service *pubsub.PubSub, err error) {
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bootstrappers := make(map[peer.ID]struct{})
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for _, pi := range in.Bp {
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bootstrappers[pi.ID] = struct{}{}
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}
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drandBootstrappers := make(map[peer.ID]struct{})
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for _, pi := range in.Db {
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drandBootstrappers[pi.ID] = struct{}{}
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}
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isBootstrapNode := in.Cfg.Bootstrapper
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drandTopicParams := &pubsub.TopicScoreParams{
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// expected 2 beaconsn/min
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TopicWeight: 0.5, // 5x block topic; max cap is 62.5
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// 1 tick per second, maxes at 1 after 1 hour
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TimeInMeshWeight: 0.00027, // ~1/3600
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TimeInMeshQuantum: time.Second,
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TimeInMeshCap: 1,
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// deliveries decay after 1 hour, cap at 25 beacons
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FirstMessageDeliveriesWeight: 5, // max value is 125
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FirstMessageDeliveriesDecay: pubsub.ScoreParameterDecay(time.Hour),
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FirstMessageDeliveriesCap: 25, // the maximum expected in an hour is ~26, including the decay
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// Mesh Delivery Failure is currently turned off for beacons
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// This is on purpose as
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// - the traffic is very low for meaningful distribution of incoming edges.
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// - the reaction time needs to be very slow -- in the order of 10 min at least
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// so we might as well let opportunistic grafting repair the mesh on its own
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// pace.
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// - the network is too small, so large asymmetries can be expected between mesh
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// edges.
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// We should revisit this once the network grows.
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// invalid messages decay after 1 hour
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InvalidMessageDeliveriesWeight: -1000,
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InvalidMessageDeliveriesDecay: pubsub.ScoreParameterDecay(time.Hour),
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}
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ingestTopicParams := &pubsub.TopicScoreParams{
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// expected ~0.5 confirmed deals / min. sampled
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TopicWeight: 0.1,
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TimeInMeshWeight: 0.00027, // ~1/3600
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TimeInMeshQuantum: time.Second,
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TimeInMeshCap: 1,
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FirstMessageDeliveriesWeight: 0.5,
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FirstMessageDeliveriesDecay: pubsub.ScoreParameterDecay(time.Hour),
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FirstMessageDeliveriesCap: 100, // allowing for burstiness
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InvalidMessageDeliveriesWeight: -1000,
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InvalidMessageDeliveriesDecay: pubsub.ScoreParameterDecay(time.Hour),
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}
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topicParams := map[string]*pubsub.TopicScoreParams{
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build.BlocksTopic(in.Nn): {
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// expected 10 blocks/min
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TopicWeight: 0.1, // max cap is 50, max mesh penalty is -10, single invalid message is -100
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// 1 tick per second, maxes at 1 after 1 hour
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TimeInMeshWeight: 0.00027, // ~1/3600
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TimeInMeshQuantum: time.Second,
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TimeInMeshCap: 1,
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// deliveries decay after 1 hour, cap at 100 blocks
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FirstMessageDeliveriesWeight: 5, // max value is 500
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FirstMessageDeliveriesDecay: pubsub.ScoreParameterDecay(time.Hour),
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FirstMessageDeliveriesCap: 100, // 100 blocks in an hour
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// Mesh Delivery Failure is currently turned off for blocks
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// This is on purpose as
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// - the traffic is very low for meaningful distribution of incoming edges.
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// - the reaction time needs to be very slow -- in the order of 10 min at least
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// so we might as well let opportunistic grafting repair the mesh on its own
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// pace.
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// - the network is too small, so large asymmetries can be expected between mesh
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// edges.
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// We should revisit this once the network grows.
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//
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// // tracks deliveries in the last minute
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// // penalty activates at 1 minute and expects ~0.4 blocks
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// MeshMessageDeliveriesWeight: -576, // max penalty is -100
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// MeshMessageDeliveriesDecay: pubsub.ScoreParameterDecay(time.Minute),
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// MeshMessageDeliveriesCap: 10, // 10 blocks in a minute
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// MeshMessageDeliveriesThreshold: 0.41666, // 10/12/2 blocks/min
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// MeshMessageDeliveriesWindow: 10 * time.Millisecond,
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// MeshMessageDeliveriesActivation: time.Minute,
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//
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// // decays after 15 min
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// MeshFailurePenaltyWeight: -576,
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// MeshFailurePenaltyDecay: pubsub.ScoreParameterDecay(15 * time.Minute),
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// invalid messages decay after 1 hour
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InvalidMessageDeliveriesWeight: -1000,
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InvalidMessageDeliveriesDecay: pubsub.ScoreParameterDecay(time.Hour),
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},
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build.MessagesTopic(in.Nn): {
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// expected > 1 tx/second
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TopicWeight: 0.1, // max cap is 5, single invalid message is -100
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// 1 tick per second, maxes at 1 hour
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TimeInMeshWeight: 0.0002778, // ~1/3600
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TimeInMeshQuantum: time.Second,
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TimeInMeshCap: 1,
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// deliveries decay after 10min, cap at 100 tx
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FirstMessageDeliveriesWeight: 0.5, // max value is 50
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FirstMessageDeliveriesDecay: pubsub.ScoreParameterDecay(10 * time.Minute),
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FirstMessageDeliveriesCap: 100, // 100 messages in 10 minutes
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// Mesh Delivery Failure is currently turned off for messages
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// This is on purpose as the network is still too small, which results in
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// asymmetries and potential unmeshing from negative scores.
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// // tracks deliveries in the last minute
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// // penalty activates at 1 min and expects 2.5 txs
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// MeshMessageDeliveriesWeight: -16, // max penalty is -100
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// MeshMessageDeliveriesDecay: pubsub.ScoreParameterDecay(time.Minute),
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// MeshMessageDeliveriesCap: 100, // 100 txs in a minute
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// MeshMessageDeliveriesThreshold: 2.5, // 60/12/2 txs/minute
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// MeshMessageDeliveriesWindow: 10 * time.Millisecond,
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// MeshMessageDeliveriesActivation: time.Minute,
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// // decays after 5min
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// MeshFailurePenaltyWeight: -16,
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// MeshFailurePenaltyDecay: pubsub.ScoreParameterDecay(5 * time.Minute),
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// invalid messages decay after 1 hour
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InvalidMessageDeliveriesWeight: -1000,
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InvalidMessageDeliveriesDecay: pubsub.ScoreParameterDecay(time.Hour),
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},
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}
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pgTopicWeights := map[string]float64{
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build.BlocksTopic(in.Nn): 10,
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build.MessagesTopic(in.Nn): 1,
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}
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var drandTopics []string
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for _, d := range in.Dr {
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topic, err := getDrandTopic(d.Config.ChainInfoJSON)
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if err != nil {
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return nil, err
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}
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topicParams[topic] = drandTopicParams
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pgTopicWeights[topic] = 5
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drandTopics = append(drandTopics, topic)
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}
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// Index ingestion whitelist
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topicParams[build.IndexerIngestTopic(in.Nn)] = ingestTopicParams
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// IP colocation whitelist
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var ipcoloWhitelist []*net.IPNet
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for _, cidr := range in.Cfg.IPColocationWhitelist {
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_, ipnet, err := net.ParseCIDR(cidr)
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if err != nil {
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return nil, xerrors.Errorf("error parsing IPColocation subnet %s: %w", cidr, err)
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}
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ipcoloWhitelist = append(ipcoloWhitelist, ipnet)
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}
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options := []pubsub.Option{
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// Gossipsubv1.1 configuration
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pubsub.WithFloodPublish(true),
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pubsub.WithMessageIdFn(HashMsgId),
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pubsub.WithPeerScore(
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&pubsub.PeerScoreParams{
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AppSpecificScore: func(p peer.ID) float64 {
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// return a heavy positive score for bootstrappers so that we don't unilaterally prune
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// them and accept PX from them.
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// we don't do that in the bootstrappers themselves to avoid creating a closed mesh
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// between them (however we might want to consider doing just that)
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_, ok := bootstrappers[p]
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if ok && !isBootstrapNode {
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return 2500
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}
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_, ok = drandBootstrappers[p]
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if ok && !isBootstrapNode {
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return 1500
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}
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// TODO: we want to plug the application specific score to the node itself in order
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// to provide feedback to the pubsub system based on observed behaviour
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return 0
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},
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AppSpecificWeight: 1,
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// This sets the IP colocation threshold to 5 peers before we apply penalties
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IPColocationFactorThreshold: 5,
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IPColocationFactorWeight: -100,
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IPColocationFactorWhitelist: ipcoloWhitelist,
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// P7: behavioural penalties, decay after 1hr
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BehaviourPenaltyThreshold: 6,
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BehaviourPenaltyWeight: -10,
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BehaviourPenaltyDecay: pubsub.ScoreParameterDecay(time.Hour),
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DecayInterval: pubsub.DefaultDecayInterval,
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DecayToZero: pubsub.DefaultDecayToZero,
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// this retains non-positive scores for 6 hours
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RetainScore: 6 * time.Hour,
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// topic parameters
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Topics: topicParams,
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},
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&pubsub.PeerScoreThresholds{
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GossipThreshold: GossipScoreThreshold,
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PublishThreshold: PublishScoreThreshold,
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GraylistThreshold: GraylistScoreThreshold,
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AcceptPXThreshold: AcceptPXScoreThreshold,
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OpportunisticGraftThreshold: OpportunisticGraftScoreThreshold,
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},
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),
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}
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// enable Peer eXchange on bootstrappers
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if isBootstrapNode {
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// turn off the mesh in bootstrappers -- only do gossip and PX
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pubsub.GossipSubD = 0
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pubsub.GossipSubDscore = 0
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pubsub.GossipSubDlo = 0
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pubsub.GossipSubDhi = 0
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pubsub.GossipSubDout = 0
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pubsub.GossipSubDlazy = 64
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pubsub.GossipSubGossipFactor = 0.25
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pubsub.GossipSubPruneBackoff = 5 * time.Minute
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// turn on PX
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options = append(options, pubsub.WithPeerExchange(true))
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}
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// direct peers
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if in.Cfg.DirectPeers != nil {
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var directPeerInfo []peer.AddrInfo
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for _, addr := range in.Cfg.DirectPeers {
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a, err := ma.NewMultiaddr(addr)
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if err != nil {
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return nil, err
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}
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pi, err := peer.AddrInfoFromP2pAddr(a)
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if err != nil {
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return nil, err
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}
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directPeerInfo = append(directPeerInfo, *pi)
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}
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options = append(options, pubsub.WithDirectPeers(directPeerInfo))
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}
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// validation queue RED
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var pgParams *pubsub.PeerGaterParams
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if isBootstrapNode {
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pgParams = pubsub.NewPeerGaterParams(
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0.33,
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pubsub.ScoreParameterDecay(2*time.Minute),
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pubsub.ScoreParameterDecay(10*time.Minute),
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).WithTopicDeliveryWeights(pgTopicWeights)
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} else {
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pgParams = pubsub.NewPeerGaterParams(
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0.33,
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pubsub.ScoreParameterDecay(2*time.Minute),
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pubsub.ScoreParameterDecay(time.Hour),
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).WithTopicDeliveryWeights(pgTopicWeights)
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}
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options = append(options, pubsub.WithPeerGater(pgParams))
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allowTopics := []string{
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build.BlocksTopic(in.Nn),
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build.MessagesTopic(in.Nn),
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build.IndexerIngestTopic(in.Nn),
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}
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allowTopics = append(allowTopics, drandTopics...)
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options = append(options,
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pubsub.WithSubscriptionFilter(
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pubsub.WrapLimitSubscriptionFilter(
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pubsub.NewAllowlistSubscriptionFilter(allowTopics...),
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100)))
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var transports []tracer.TracerTransport
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if in.Cfg.JsonTracer != "" {
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jsonTransport, err := tracer.NewJsonTracerTransport(in.Cfg.JsonTracer)
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if err != nil {
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return nil, err
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}
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transports = append(transports, jsonTransport)
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}
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tps := make([]string, 0) // range of topics that will be submited to the traces
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addTopicToList := func(topicList []string, newTopic string) []string {
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// check if the topic is already in the list
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for _, tp := range topicList {
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if tp == newTopic {
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return topicList
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}
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}
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// add it otherwise
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return append(topicList, newTopic)
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}
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// tracer
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if in.Cfg.ElasticSearchTracer != "" {
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elasticSearchTransport, err := tracer.NewElasticSearchTransport(
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in.Cfg.ElasticSearchTracer,
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in.Cfg.ElasticSearchIndex,
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)
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if err != nil {
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return nil, err
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}
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transports = append(transports, elasticSearchTransport)
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tps = addTopicToList(tps, build.BlocksTopic(in.Nn))
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}
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lt := tracer.NewLotusTracer(transports, in.Host.ID(), in.Cfg.TracerSourceAuth)
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// tracer
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if in.Cfg.RemoteTracer != "" {
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a, err := ma.NewMultiaddr(in.Cfg.RemoteTracer)
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if err != nil {
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return nil, err
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}
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pi, err := peer.AddrInfoFromP2pAddr(a)
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if err != nil {
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return nil, err
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}
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tr, err := pubsub.NewRemoteTracer(context.TODO(), in.Host, *pi)
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if err != nil {
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return nil, err
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}
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pst := newPeerScoreTracker(lt, in.Sk)
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trw := newTracerWrapper(tr, lt, tps...)
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options = append(options, pubsub.WithEventTracer(trw))
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options = append(options, pubsub.WithPeerScoreInspect(pst.UpdatePeerScore, 10*time.Second))
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} else {
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// still instantiate a tracer for collecting metrics
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pst := newPeerScoreTracker(lt, in.Sk)
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trw := newTracerWrapper(nil, lt, tps...)
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options = append(options, pubsub.WithEventTracer(trw))
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options = append(options, pubsub.WithPeerScoreInspect(pst.UpdatePeerScore, 10*time.Second))
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}
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return pubsub.NewGossipSub(helpers.LifecycleCtx(in.Mctx, in.Lc), in.Host, options...)
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}
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func HashMsgId(m *pubsub_pb.Message) string {
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hash := blake2b.Sum256(m.Data)
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return string(hash[:])
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}
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func newTracerWrapper(
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lp2pTracer pubsub.EventTracer,
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lotusTracer pubsub.EventTracer,
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topics ...string,
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) pubsub.EventTracer {
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var topicsMap map[string]struct{}
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if len(topics) > 0 {
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topicsMap = make(map[string]struct{})
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for _, topic := range topics {
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topicsMap[topic] = struct{}{}
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}
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}
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return &tracerWrapper{lp2pTracer: lp2pTracer, lotusTracer: lotusTracer, topics: topicsMap}
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}
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type tracerWrapper struct {
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lp2pTracer pubsub.EventTracer
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lotusTracer pubsub.EventTracer
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topics map[string]struct{}
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}
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func (trw *tracerWrapper) traceMessage(topic string) bool {
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_, ok := trw.topics[topic]
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return ok
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}
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func (trw *tracerWrapper) Trace(evt *pubsub_pb.TraceEvent) {
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// this filters the trace events reported to the remote tracer to include only
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// JOIN/LEAVE/GRAFT/PRUNE/PUBLISH/DELIVER. This significantly reduces bandwidth usage and still
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// collects enough data to recover the state of the mesh and compute message delivery latency
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// distributions.
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// Furthermore, we only trace message publication and deliveries for specified topics
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// (here just the blocks topic).
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switch evt.GetType() {
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case pubsub_pb.TraceEvent_PUBLISH_MESSAGE:
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|
stats.Record(context.TODO(), metrics.PubsubPublishMessage.M(1))
|
|
if trw.traceMessage(evt.GetPublishMessage().GetTopic()) {
|
|
if trw.lp2pTracer != nil {
|
|
trw.lp2pTracer.Trace(evt)
|
|
}
|
|
if trw.lotusTracer != nil {
|
|
trw.lotusTracer.Trace(evt)
|
|
}
|
|
}
|
|
|
|
case pubsub_pb.TraceEvent_DELIVER_MESSAGE:
|
|
stats.Record(context.TODO(), metrics.PubsubDeliverMessage.M(1))
|
|
|
|
case pubsub_pb.TraceEvent_REJECT_MESSAGE:
|
|
stats.Record(context.TODO(), metrics.PubsubRejectMessage.M(1))
|
|
if trw.traceMessage(evt.GetRejectMessage().GetTopic()) {
|
|
if trw.lp2pTracer != nil {
|
|
trw.lp2pTracer.Trace(evt)
|
|
}
|
|
if trw.lotusTracer != nil {
|
|
trw.lotusTracer.Trace(evt)
|
|
}
|
|
}
|
|
|
|
case pubsub_pb.TraceEvent_DUPLICATE_MESSAGE:
|
|
stats.Record(context.TODO(), metrics.PubsubDuplicateMessage.M(1))
|
|
if trw.traceMessage(evt.GetDuplicateMessage().GetTopic()) {
|
|
if trw.lp2pTracer != nil {
|
|
trw.lp2pTracer.Trace(evt)
|
|
}
|
|
if trw.lotusTracer != nil {
|
|
trw.lotusTracer.Trace(evt)
|
|
}
|
|
}
|
|
|
|
case pubsub_pb.TraceEvent_JOIN:
|
|
if trw.traceMessage(evt.GetJoin().GetTopic()) {
|
|
if trw.lp2pTracer != nil {
|
|
trw.lp2pTracer.Trace(evt)
|
|
}
|
|
if trw.lotusTracer != nil {
|
|
trw.lotusTracer.Trace(evt)
|
|
}
|
|
}
|
|
case pubsub_pb.TraceEvent_LEAVE:
|
|
if trw.traceMessage(evt.GetLeave().GetTopic()) {
|
|
if trw.lp2pTracer != nil {
|
|
trw.lp2pTracer.Trace(evt)
|
|
}
|
|
if trw.lotusTracer != nil {
|
|
trw.lotusTracer.Trace(evt)
|
|
}
|
|
}
|
|
|
|
case pubsub_pb.TraceEvent_GRAFT:
|
|
if trw.traceMessage(evt.GetGraft().GetTopic()) {
|
|
if trw.lp2pTracer != nil {
|
|
trw.lp2pTracer.Trace(evt)
|
|
}
|
|
|
|
if trw.lotusTracer != nil {
|
|
trw.lotusTracer.Trace(evt)
|
|
}
|
|
}
|
|
|
|
case pubsub_pb.TraceEvent_PRUNE:
|
|
if trw.traceMessage(evt.GetPrune().GetTopic()) {
|
|
if trw.lp2pTracer != nil {
|
|
trw.lp2pTracer.Trace(evt)
|
|
}
|
|
if trw.lotusTracer != nil {
|
|
trw.lotusTracer.Trace(evt)
|
|
}
|
|
}
|
|
|
|
case pubsub_pb.TraceEvent_ADD_PEER:
|
|
if trw.lp2pTracer != nil {
|
|
trw.lp2pTracer.Trace(evt)
|
|
}
|
|
if trw.lotusTracer != nil {
|
|
trw.lotusTracer.Trace(evt)
|
|
}
|
|
|
|
case pubsub_pb.TraceEvent_REMOVE_PEER:
|
|
if trw.lp2pTracer != nil {
|
|
trw.lp2pTracer.Trace(evt)
|
|
}
|
|
if trw.lotusTracer != nil {
|
|
trw.lotusTracer.Trace(evt)
|
|
}
|
|
|
|
case pubsub_pb.TraceEvent_RECV_RPC:
|
|
stats.Record(context.TODO(), metrics.PubsubRecvRPC.M(1))
|
|
// only track the RPC Calls from IWANT / IHAVE / BLOCK topic
|
|
controlRPC := evt.GetRecvRPC().GetMeta().GetControl()
|
|
ihave := controlRPC.GetIhave()
|
|
iwant := controlRPC.GetIwant()
|
|
msgsRPC := evt.GetRecvRPC().GetMeta().GetMessages()
|
|
|
|
// check if any of the messages we are sending belong to a trackable topic
|
|
var validTopic bool = false
|
|
for _, topic := range msgsRPC {
|
|
if trw.traceMessage(topic.GetTopic()) {
|
|
validTopic = true
|
|
break
|
|
}
|
|
}
|
|
// track if the Iwant / Ihave messages are from a valid Topic
|
|
var validIhave bool = false
|
|
for _, msgs := range ihave {
|
|
if trw.traceMessage(msgs.GetTopic()) {
|
|
validIhave = true
|
|
break
|
|
}
|
|
}
|
|
// check if we have any of iwant msgs (it doesn't classify per topic - just msg.ID)
|
|
validIwant := len(iwant) > 0
|
|
|
|
// trace the event if any of the flags was triggered
|
|
if validIhave || validIwant || validTopic {
|
|
if trw.lp2pTracer != nil {
|
|
trw.lp2pTracer.Trace(evt)
|
|
}
|
|
if trw.lotusTracer != nil {
|
|
trw.lotusTracer.Trace(evt)
|
|
}
|
|
}
|
|
case pubsub_pb.TraceEvent_SEND_RPC:
|
|
stats.Record(context.TODO(), metrics.PubsubSendRPC.M(1))
|
|
// only track the RPC Calls from IWANT / IHAVE / BLOCK topic
|
|
controlRPC := evt.GetSendRPC().GetMeta().GetControl()
|
|
ihave := controlRPC.GetIhave()
|
|
iwant := controlRPC.GetIwant()
|
|
msgsRPC := evt.GetSendRPC().GetMeta().GetMessages()
|
|
|
|
// check if any of the messages we are sending belong to a trackable topic
|
|
var validTopic bool = false
|
|
for _, topic := range msgsRPC {
|
|
if trw.traceMessage(topic.GetTopic()) {
|
|
validTopic = true
|
|
break
|
|
}
|
|
}
|
|
// track if the Iwant / Ihave messages are from a valid Topic
|
|
var validIhave bool = false
|
|
for _, msgs := range ihave {
|
|
if trw.traceMessage(msgs.GetTopic()) {
|
|
validIhave = true
|
|
break
|
|
}
|
|
}
|
|
// check if there was any of the Iwant msgs
|
|
validIwant := len(iwant) > 0
|
|
|
|
// trace the msgs if any of the flags was triggered
|
|
if validIhave || validIwant || validTopic {
|
|
if trw.lp2pTracer != nil {
|
|
trw.lp2pTracer.Trace(evt)
|
|
}
|
|
if trw.lotusTracer != nil {
|
|
trw.lotusTracer.Trace(evt)
|
|
}
|
|
}
|
|
case pubsub_pb.TraceEvent_DROP_RPC:
|
|
stats.Record(context.TODO(), metrics.PubsubDropRPC.M(1))
|
|
}
|
|
}
|