Merge pull request #928 from iotaledger/fix/initial-cumulative-attest…

…ed-weight

Initialize CumulativeAttestedWeight for the root commitment

pkg/protocol/commitment.go

@@ -243,6 +243,10 @@ func (c *Commitment) initDerivedProperties() (shutdown func()) {
 		c.IsVerified.InheritFrom(c.IsRoot),
 		c.IsSolid.InheritFrom(c.IsRoot),
 
+		c.IsRoot.OnTrigger(func() {
+			c.CumulativeAttestedWeight.Set(c.Commitment.CumulativeWeight())
+		}),
+
 		// mark commitments that are marked as verified as attested and synced
 		c.IsAttested.InheritFrom(c.IsVerified),
 		c.IsSynced.InheritFrom(c.IsVerified),
@@ -336,9 +340,13 @@ func (c *Commitment) deriveChain(parent *Commitment) func() {
 // deriveCumulativeAttestedWeight derives the CumulativeAttestedWeight of this Commitment which is the sum of the
 // parent's CumulativeAttestedWeight and the AttestedWeight of this Commitment.
 func (c *Commitment) deriveCumulativeAttestedWeight(parent *Commitment) func() {
-	return c.CumulativeAttestedWeight.DeriveValueFrom(reactive.NewDerivedVariable2(func(_ uint64, parentCumulativeAttestedWeight uint64, attestedWeight uint64) uint64 {
+	return c.CumulativeAttestedWeight.DeriveValueFrom(reactive.NewDerivedVariable3(func(currentCumulativeAttestedWeight uint64, parentCumulativeAttestedWeight uint64, attestedWeight uint64, isAttested bool) uint64 {
+		if !isAttested {
+			return currentCumulativeAttestedWeight
+		}
+
 		return parentCumulativeAttestedWeight + attestedWeight
-	}, parent.CumulativeAttestedWeight, c.AttestedWeight))
+	}, parent.CumulativeAttestedWeight, c.AttestedWeight, c.IsAttested))
 }
 
 // deriveCumulativeVerifiedWeight derives the CumulativeVerifiedWeight of this Commitment which is the same as the