Fix trigger epoch start on boot

epochStart/metachain/epochStartData.go

@@ -183,6 +183,7 @@ func (e *epochStartData) CreateEpochStartData() (*block.EpochStart, error) {
 func (e *epochStartData) CreateEpochStartShardDataMetablockV3(metablock data.MetaHeaderHandler) ([]block.EpochStartShardData, error) {
 	log.Debug("CreateEpochStartShardDataMetablockV3",
 		"metablock epoch", metablock.GetEpoch(),
+		"for epoch", metablock.GetEpoch()+1,
 		"isEpochChangeProposed", metablock.IsEpochChangeProposed(),
 		"trigger epoch", e.epochStartTrigger.Epoch())
 
@@ -390,17 +391,34 @@ func (e *epochStartData) getShardDataFromEpochStartData(
 	return nil, nil, process.ErrGettingShardDataFromEpochStartData
 }
 
+func (e *epochStartData) getPrevEpoch() uint32 {
+	prevEpoch := e.genesisEpoch
+
+	epochStartTriggerEpoch := e.epochStartTrigger.Epoch()
+
+	if epochStartTriggerEpoch <= e.genesisEpoch {
+		return prevEpoch
+	}
+
+	prevEpoch = e.epochStartTrigger.Epoch()
+
+	isAfterSupernova := epochStartTriggerEpoch > e.enableEpochsHandler.GetActivationEpoch(common.SupernovaFlag)
+	if !isAfterSupernova {
+		prevEpoch--
+	}
+
+	return prevEpoch
+}
+
 func (e *epochStartData) computePendingMiniBlockList(
 	startData *block.EpochStart,
 	allShardHdrList [][]data.HeaderHandler,
 ) ([]block.MiniBlockHeader, error) {
-
-	prevEpoch := e.genesisEpoch
-	if e.epochStartTrigger.Epoch() > e.genesisEpoch {
-		prevEpoch = e.epochStartTrigger.Epoch() - 1
-	}
+	prevEpoch := e.getPrevEpoch()
 
 	epochStartIdentifier := core.EpochStartIdentifier(prevEpoch)
+
+	// TODO: analyse error handling here
 	previousEpochStartMeta, _ := process.GetMetaHeaderFromStorage([]byte(epochStartIdentifier), e.marshalizer, e.store)
 
 	allPending := make([]block.MiniBlockHeader, 0)

epochStart/metachain/trigger.go

@@ -261,7 +261,7 @@ func (t *trigger) Update(round uint64, nonce uint64) {
 	}
 
 	if t.shouldTriggerEpochStart(round, nonce) {
-		t.setEpochChange(round)
+		t.setEpochChange(round, t.epoch+1)
 	}
 }
 
@@ -270,11 +270,11 @@ func (t *trigger) SetEpochChange(round uint64) {
 	t.mutTrigger.Lock()
 	defer t.mutTrigger.Unlock()
 
-	t.setEpochChange(round)
+	t.setEpochChange(round, t.epoch+1)
 }
 
-func (t *trigger) setEpochChange(round uint64) {
-	t.epoch += 1
+func (t *trigger) setEpochChange(round uint64, epoch uint32) {
+	t.epoch = epoch
 	t.isEpochStart = true
 	t.prevEpochStartRound = t.currEpochStartRound
 	t.currEpochStartRound = round
@@ -300,7 +300,7 @@ func (t *trigger) SetProcessed(header data.HeaderHandler, body data.BodyHandler)
 	}
 
 	if header.IsHeaderV3() {
-		t.setEpochChange(header.GetRound())
+		t.setEpochChange(header.GetRound(), header.GetEpoch())
 	}
 
 	metaBuff, errNotCritical := t.marshaller.Marshal(metaBlock)

storage/pruning/pruningStorer.go

@@ -978,7 +978,7 @@ func (ps *PruningStorer) changeEpochWithExisting(epoch uint32) error {
 	for e := int64(epoch); e >= oldestEpochActive; e-- {
 		p, ok := ps.persistersMapByEpoch[uint32(e)]
 		if !ok {
-			return nil
+			continue
 		}
 		persisters = append(persisters, p)
 	}
@@ -1007,7 +1007,7 @@ func (ps *PruningStorer) extendActivePersisters(from uint32, to uint32) error {
 	for e := int(to); e >= int(from); e-- {
 		p, ok := ps.persistersMapByEpoch[uint32(e)]
 		if !ok {
-			return nil
+			continue
 		}
 		persisters = append(persisters, p)
 	}