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fix(pubsub): Switch to a last-seen cache strategy #12389

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5 changes: 5 additions & 0 deletions node/modules/lp2p/pubsub.go
Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ import (

pubsub "github.com/libp2p/go-libp2p-pubsub"
pubsub_pb "github.com/libp2p/go-libp2p-pubsub/pb"
"github.com/libp2p/go-libp2p-pubsub/timecache"
"github.com/libp2p/go-libp2p/core/host"
"github.com/libp2p/go-libp2p/core/peer"
"github.com/minio/blake2b-simd"
Expand Down Expand Up @@ -486,6 +487,10 @@ func GossipSub(in GossipIn) (service *pubsub.PubSub, err error) {
options = append(options, pubsub.WithPeerScoreInspect(pst.UpdatePeerScore, 10*time.Second))
}

// This way, we stop propegating a message until it drops off the network. Otherwise, we'll
// ignore the message for 2m then start broadcasting it again.
options = append(options, pubsub.WithSeenMessagesStrategy(timecache.Strategy_LastSeen))

return pubsub.NewGossipSub(helpers.LifecycleCtx(in.Mctx, in.Lc), in.Host, options...)
}

Expand Down
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