op-node: Soften app score weights.

op-node/p2p/app_params.go

@@ -33,16 +33,24 @@ func LightApplicationScoreParams(cfg *rollup.Config) ApplicationScoreParams {
 	epoch := 6 * slot
 	tenEpochs := 10 * epoch
 	return ApplicationScoreParams{
-		ValidResponseCap:      10,
-		ValidResponseWeight:   1,
-		ValidResponseDecay:    ScoreDecay(tenEpochs, slot),
-		ErrorResponseCap:      10,
-		ErrorResponseWeight:   -16,
-		ErrorResponseDecay:    ScoreDecay(tenEpochs, slot),
-		RejectedPayloadCap:    10,
-		RejectedPayloadWeight: -50,
+		// Max positive score from valid responses: 5
+		ValidResponseCap:    10,
+		ValidResponseWeight: 0.5,
+		ValidResponseDecay:  ScoreDecay(tenEpochs, slot),
+
+		// Takes 20 error responses to reach the default ban threshold of -100
+		// But at most we track 10. These errors include not supporting p2p sync
+		// so we don't (yet) want to ban a peer based on this measure alone.
+		ErrorResponseCap:    10,
+		ErrorResponseWeight: -5,
+		ErrorResponseDecay:  ScoreDecay(tenEpochs, slot),
+
+		// Takes 5 rejected payloads to reach the default ban threshold of -100
+		RejectedPayloadCap:    20,
+		RejectedPayloadWeight: -20,
 		RejectedPayloadDecay:  ScoreDecay(tenEpochs, slot),
-		DecayToZero:           DecayToZero,
-		DecayInterval:         slot,
+
+		DecayToZero:   DecayToZero,
+		DecayInterval: slot,
 	}
 }