Fixed pool rewards not getting exported when creating a snapshot with targetEpoch 0

pkg/protocol/engine/notarization/slotnotarization/manager.go

@@ -272,7 +272,7 @@ func (m *Manager) createCommitment(slot iotago.SlotIndex) (*model.Commitment, er
 		rmc,
 	)
 
-	m.LogDebug("Committing", "commitment", newCommitment, "roots ", roots)
+	m.LogInfo("Committing", "commitment", newCommitment, "roots ", roots)
 
 	newModelCommitment, err := model.CommitmentFromCommitment(newCommitment, apiForSlot, serix.WithValidation())
 	if err != nil {

pkg/protocol/sybilprotection/sybilprotectionv1/performance/snapshot.go

@@ -293,52 +293,58 @@ func (t *Tracker) exportPoolRewards(writer io.WriteSeeker, targetEpoch iotago.Ep
 
 	if err := stream.WriteCollection(writer, serializer.SeriLengthPrefixTypeAsUint32, func() (int, error) {
 		var epochCount int
-		// Here underflow will not happen because we will stop iterating for epoch 0, because 0 is not greater than zero.
-		// Use safemath here anyway to avoid hard to trace problems stemming from an accidental underflow.
-		for epoch := targetEpoch; epoch > earliestRewardEpoch; epoch = lo.PanicOnErr(safemath.SafeSub(epoch, 1)) {
+		// Start at the targest epoch and go back in time until earliestRewardEpoch or epoch 0 (included)
+		epoch := targetEpoch
+		for {
 			rewardsMap, err := t.rewardsMap(epoch)
 			if err != nil {
 				return 0, ierrors.Wrapf(err, "unable to get rewards tree for epoch %d", epoch)
 			}
-			// if the map was not present in storage we can skip this epoch
-			if !rewardsMap.WasRestoredFromStorage() {
-				t.LogDebug("Skipping epoch", "epoch", epoch, "reason", "not restored from storage")
-				continue
-			}
 
-			t.LogDebug("Exporting Pool Rewards", "epoch", epoch)
+			if rewardsMap.WasRestoredFromStorage() {
+				t.LogDebug("Exporting Pool Rewards", "epoch", epoch)
 
-			if err := stream.Write(writer, epoch); err != nil {
-				return 0, ierrors.Wrapf(err, "unable to write epoch index for epoch index %d", epoch)
-			}
+				if err := stream.Write(writer, epoch); err != nil {
+					return 0, ierrors.Wrapf(err, "unable to write epoch index for epoch index %d", epoch)
+				}
 
-			if err := stream.WriteCollection(writer, serializer.SeriLengthPrefixTypeAsUint64, func() (int, error) {
-				var accountCount int
+				if err := stream.WriteCollection(writer, serializer.SeriLengthPrefixTypeAsUint64, func() (int, error) {
+					var accountCount int
 
-				if err = rewardsMap.Stream(func(key iotago.AccountID, value *model.PoolRewards) error {
-					if err := stream.Write(writer, key); err != nil {
-						return ierrors.Wrapf(err, "unable to write account id for epoch %d and accountID %s", epoch, key)
-					}
+					if err = rewardsMap.Stream(func(key iotago.AccountID, value *model.PoolRewards) error {
+						if err := stream.Write(writer, key); err != nil {
+							return ierrors.Wrapf(err, "unable to write account id for epoch %d and accountID %s", epoch, key)
+						}
 
-					if err := stream.WriteObject(writer, value, (*model.PoolRewards).Bytes); err != nil {
-						return ierrors.Wrapf(err, "unable to write account rewards for epoch index %d and accountID %s", epoch, key)
-					}
+						if err := stream.WriteObject(writer, value, (*model.PoolRewards).Bytes); err != nil {
+							return ierrors.Wrapf(err, "unable to write account rewards for epoch index %d and accountID %s", epoch, key)
+						}
 
-					t.LogDebug("Exporting Pool Reward", "epoch", epoch, "accountID", key, "rewards", value)
+						t.LogDebug("Exporting Pool Reward", "epoch", epoch, "accountID", key, "rewards", value)
 
-					accountCount++
+						accountCount++
 
-					return nil
+						return nil
+					}); err != nil {
+						return 0, ierrors.Wrapf(err, "unable to stream rewards for epoch index %d", epoch)
+					}
+
+					return accountCount, nil
 				}); err != nil {
-					return 0, ierrors.Wrapf(err, "unable to stream rewards for epoch index %d", epoch)
+					return 0, ierrors.Wrapf(err, "unable to write rewards for epoch index %d", epoch)
 				}
 
-				return accountCount, nil
-			}); err != nil {
-				return 0, ierrors.Wrapf(err, "unable to write rewards for epoch index %d", epoch)
+				epochCount++
+			} else {
+				// if the map was not present in storage we can skip this epoch
+				t.LogDebug("Skipping epoch", "epoch", epoch, "reason", "not restored from storage")
 			}
 
-			epochCount++
+			if epoch <= earliestRewardEpoch {
+				// Every reward before earliestRewardEpoch is already exported, so stop here
+				break
+			}
+			epoch = lo.PanicOnErr(safemath.SafeSub(epoch, 1))
 		}
 
 		return epochCount, nil