From 1c85190323e30b82774016d89a7882f2a5e5d021 Mon Sep 17 00:00:00 2001
From: vyzo <vyzo@hackzen.org>
Date: Fri, 8 May 2020 19:59:33 +0300
Subject: [PATCH] make p4 quadratic

---
 score.go        | 2 +-
 score_params.go | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/score.go b/score.go
index d9633ae..777530e 100644
--- a/score.go
+++ b/score.go
@@ -219,7 +219,7 @@ func (ps *peerScore) score(p peer.ID) float64 {
 
 		// P4: invalid messages
 		// NOTE: the weight of P4 is negative (validated in TopicScoreParams.validate), so this detracts.
-		p4 := tstats.invalidMessageDeliveries
+		p4 := (tstats.invalidMessageDeliveries * tstats.invalidMessageDeliveries)
 		topicScore += p4 * topicParams.InvalidMessageDeliveriesWeight
 
 		// update score, mixing with topic weight
diff --git a/score_params.go b/score_params.go
index 6ee0654..d004de3 100644
--- a/score_params.go
+++ b/score_params.go
@@ -139,7 +139,8 @@ type TopicScoreParams struct {
 
 	// P4: invalid messages
 	// This is the number of invalid messages in the topic.
-	// The value of the parameter is a counter, decaying with InvalidMessageDeliveriesDecay.
+	// The value of the parameter is the square of the counter, decaying with
+	// InvalidMessageDeliveriesDecay.
 	// The weight of the parameter MUST be negative (or zero to disable).
 	InvalidMessageDeliveriesWeight, InvalidMessageDeliveriesDecay float64
 }