bug(dot/state): delete previous previous finalised trie from BlockState.tries

dot/state/block_finalisation.go

@@ -118,7 +118,6 @@ func (bs *BlockState) GetHighestFinalisedHeader() (*types.Header, error) {
 func (bs *BlockState) SetFinalisedHash(hash common.Hash, round, setID uint64) error {
 	bs.Lock()
 	defer bs.Unlock()
-
 	has, _ := bs.HasHeader(hash)
 	if !has {
 		return fmt.Errorf("cannot finalise unknown block %s", hash)
@@ -136,10 +135,6 @@ func (bs *BlockState) SetFinalisedHash(hash common.Hash, round, setID uint64) er
 		return fmt.Errorf("failed to set highest round and set ID: %w", err)
 	}
 
-	if err := bs.handleFinalisedBlock(hash); err != nil {
-		return fmt.Errorf("failed to set number->hash mapping on finalisation: %w", err)
-	}
-
 	if round > 0 {
 		bs.notifyFinalized(hash, round, setID)
 	}
@@ -176,6 +171,21 @@ func (bs *BlockState) SetFinalisedHash(hash common.Hash, round, setID uint64) er
 		),
 	)
 
+	if !bs.lastFinalised.Equal(hash) {
+		defer func(lastFinalised common.Hash) {
+			lastFinalisedHeader, err := bs.GetHeader(lastFinalised)
+			if err != nil {
+				logger.Debugf("unable to retrieve header for last finalised block, hash: %s, err: %s", bs.lastFinalised, err)
+			}
+			stateRootTrie := bs.tries.get(lastFinalisedHeader.StateRoot)
+			if stateRootTrie != nil {
+				bs.tries.delete(lastFinalisedHeader.StateRoot)
+			} else {
+				logger.Errorf("unable to find trie with stateroot hash: %s", lastFinalisedHeader.StateRoot)
+			}
+		}(bs.lastFinalised)
+	}
+
 	bs.lastFinalised = hash
 	return nil
 }
@@ -243,7 +253,6 @@ func (bs *BlockState) handleFinalisedBlock(curr common.Hash) error {
 
 		logger.Tracef("cleaned out finalised block from memory; block number %s with hash %s", block.Header.Number, hash)
 	}
-
 	return batch.Flush()
 }
 

dot/state/block_finalisation_test.go

@@ -10,7 +10,6 @@ import (
 	"github.com/ChainSafe/gossamer/dot/types"
 	"github.com/ChainSafe/gossamer/lib/common"
 	"github.com/ChainSafe/gossamer/lib/trie"
-	"github.com/golang/mock/gomock"
 
 	"github.com/stretchr/testify/require"
 )
@@ -64,16 +63,7 @@ func TestHighestRoundAndSetID(t *testing.T) {
 }
 
 func TestBlockState_SetFinalisedHash(t *testing.T) {
-	ctrl := gomock.NewController(t)
-
-	triesGauge := NewMockGauge(ctrl)
-	triesGauge.EXPECT().Set(0.00)
-	tries := &Tries{
-		rootToTrie: make(map[common.Hash]*trie.Trie),
-		triesGauge: triesGauge,
-	}
-
-	bs := newTestBlockState(t, testGenesisHeader, tries)
+	bs := newTestBlockState(t, testGenesisHeader, newTriesEmpty())
 	h, err := bs.GetFinalisedHash(0, 0)
 	require.NoError(t, err)
 	require.Equal(t, testGenesisHeader.Hash(), h)
@@ -84,10 +74,13 @@ func TestBlockState_SetFinalisedHash(t *testing.T) {
 	require.NotNil(t, di)
 	err = digest.Add(*di)
 	require.NoError(t, err)
+
+	someStateRoot := common.Hash{1, 1}
 	header := &types.Header{
 		ParentHash: testGenesisHeader.Hash(),
 		Number:     big.NewInt(1),
 		Digest:     digest,
+		StateRoot:  someStateRoot,
 	}
 
 	testhash := header.Hash()
@@ -100,6 +93,9 @@ func TestBlockState_SetFinalisedHash(t *testing.T) {
 	})
 	require.NoError(t, err)
 
+	// set tries with some state root
+	bs.tries.softSet(someStateRoot, trie.NewEmptyTrie())
+
 	err = bs.SetFinalisedHash(testhash, 1, 1)
 	require.NoError(t, err)
 
@@ -109,16 +105,7 @@ func TestBlockState_SetFinalisedHash(t *testing.T) {
 }
 
 func TestSetFinalisedHash_setFirstSlotOnFinalisation(t *testing.T) {
-	ctrl := gomock.NewController(t)
-
-	triesGauge := NewMockGauge(ctrl)
-	triesGauge.EXPECT().Set(0.00).Times(2)
-	tries := &Tries{
-		rootToTrie: make(map[common.Hash]*trie.Trie),
-		triesGauge: triesGauge,
-	}
-
-	bs := newTestBlockState(t, testGenesisHeader, tries)
+	bs := newTestBlockState(t, testGenesisHeader, newTriesEmpty())
 	firstSlot := uint64(42069)
 
 	digest := types.NewDigest()

dot/state/block_notify_test.go

@@ -10,11 +10,8 @@ import (
 	"time"
 
 	"github.com/ChainSafe/gossamer/dot/types"
-	"github.com/ChainSafe/gossamer/lib/common"
 	"github.com/ChainSafe/gossamer/lib/runtime"
 	runtimemocks "github.com/ChainSafe/gossamer/lib/runtime/mocks"
-	"github.com/ChainSafe/gossamer/lib/trie"
-	"github.com/golang/mock/gomock"
 	"github.com/stretchr/testify/require"
 )
 
@@ -47,16 +44,7 @@ func TestFreeImportedBlockNotifierChannel(t *testing.T) {
 }
 
 func TestFinalizedChannel(t *testing.T) {
-	ctrl := gomock.NewController(t)
-
-	triesGauge := NewMockGauge(ctrl)
-	triesGauge.EXPECT().Set(0.00).Times(3)
-	tries := &Tries{
-		rootToTrie: make(map[common.Hash]*trie.Trie),
-		triesGauge: triesGauge,
-	}
-
-	bs := newTestBlockState(t, testGenesisHeader, tries)
+	bs := newTestBlockState(t, testGenesisHeader, newTriesEmpty())
 
 	ch := bs.GetFinalisedNotifierChannel()
 
@@ -111,16 +99,7 @@ func TestImportChannel_Multi(t *testing.T) {
 }
 
 func TestFinalizedChannel_Multi(t *testing.T) {
-	ctrl := gomock.NewController(t)
-
-	triesGauge := NewMockGauge(ctrl)
-	triesGauge.EXPECT().Set(0.00)
-	tries := &Tries{
-		rootToTrie: make(map[common.Hash]*trie.Trie),
-		triesGauge: triesGauge,
-	}
-
-	bs := newTestBlockState(t, testGenesisHeader, tries)
+	bs := newTestBlockState(t, testGenesisHeader, newTriesEmpty())
 
 	num := 5
 	chs := make([]chan *types.FinalisationInfo, num)

dot/state/block_race_test.go

@@ -28,7 +28,7 @@ func TestConcurrencySetHeader(t *testing.T) {
 		dbs[i] = NewInMemoryDB(t)
 	}
 
-	tries := (*Tries)(nil) // not used in this test
+	tries := newTriesEmpty()
 
 	pend := new(sync.WaitGroup)
 	pend.Add(threads)

dot/state/block_test.go

@@ -37,6 +37,12 @@ func newTestBlockState(t *testing.T, header *types.Header, tries *Tries) *BlockS
 
 	bs, err := NewBlockStateFromGenesis(db, tries, header, telemetryMock)
 	require.NoError(t, err)
+
+	tr := trie.NewEmptyTrie()
+	err = tr.Load(bs.db, header.StateRoot)
+	require.NoError(t, err)
+	bs.tries.softSet(header.StateRoot, tr)
+
 	return bs
 }
 
@@ -262,16 +268,7 @@ func TestAddBlock_BlockNumberToHash(t *testing.T) {
 }
 
 func TestFinalization_DeleteBlock(t *testing.T) {
-	ctrl := gomock.NewController(t)
-
-	triesGauge := NewMockGauge(ctrl)
-	triesGauge.EXPECT().Set(0.00).Times(5)
-	tries := &Tries{
-		rootToTrie: make(map[common.Hash]*trie.Trie),
-		triesGauge: triesGauge,
-	}
-
-	bs := newTestBlockState(t, testGenesisHeader, tries)
+	bs := newTestBlockState(t, testGenesisHeader, newTriesEmpty())
 	AddBlocksToState(t, bs, 5, false)
 
 	btBefore := bs.bt.DeepCopy()
@@ -482,14 +479,7 @@ func TestAddBlockToBlockTree(t *testing.T) {
 }
 
 func TestNumberIsFinalised(t *testing.T) {
-	ctrl := gomock.NewController(t)
-
-	triesGauge := NewMockGauge(ctrl)
-	triesGauge.EXPECT().Set(0.00).Times(2)
-	tries := &Tries{
-		rootToTrie: make(map[common.Hash]*trie.Trie),
-		triesGauge: triesGauge,
-	}
+	tries := newTriesEmpty()
 
 	bs := newTestBlockState(t, testGenesisHeader, tries)
 	fin, err := bs.NumberIsFinalised(big.NewInt(0))

dot/state/helpers_test.go

@@ -15,7 +15,10 @@ import (
 
 func newTriesEmpty() *Tries {
 	return &Tries{
-		rootToTrie: make(map[common.Hash]*trie.Trie),
+		rootToTrie:    make(map[common.Hash]*trie.Trie),
+		triesGauge:    triesGauge,
+		setCounter:    setCounter,
+		deleteCounter: deleteCounter,
 	}
 }