graph/db: remove KVStore fall-back

Now that SQLStore fully implements V1Store, we no longer need the
KVStore fall-back.

docs/release-notes/release-notes-0.20.0.md

@@ -91,6 +91,7 @@ circuit. The indices are only available for forwarding events saved after v0.20.
     * [8](https://github.com/lightningnetwork/lnd/pull/9938)
     * [9](https://github.com/lightningnetwork/lnd/pull/9939)
     * [10](https://github.com/lightningnetwork/lnd/pull/9971)
+    * [11](https://github.com/lightningnetwork/lnd/pull/9972)
 
 ## RPC Updates
 

graph/db/sql_store.go

@@ -175,10 +175,6 @@ type SQLStore struct {
 
 	srcNodes  map[ProtocolVersion]*srcNodeInfo
 	srcNodeMu sync.Mutex
-
-	// Temporary fall-back to the KVStore so that we can implement the
-	// interface incrementally.
-	*KVStore
 }
 
 // A compile-time assertion to ensure that SQLStore implements the V1Store
@@ -194,7 +190,7 @@ type SQLStoreConfig struct {
 
 // NewSQLStore creates a new SQLStore instance given an open BatchedSQLQueries
 // storage backend.
-func NewSQLStore(cfg *SQLStoreConfig, db BatchedSQLQueries, kvStore *KVStore,
+func NewSQLStore(cfg *SQLStoreConfig, db BatchedSQLQueries,
 	options ...StoreOptionModifier) (*SQLStore, error) {
 
 	opts := DefaultOptions()
@@ -210,7 +206,6 @@ func NewSQLStore(cfg *SQLStoreConfig, db BatchedSQLQueries, kvStore *KVStore,
 	s := &SQLStore{
 		cfg:         cfg,
 		db:          db,
-		KVStore:     kvStore,
 		rejectCache: newRejectCache(opts.RejectCacheSize),
 		chanCache:   newChannelCache(opts.ChannelCacheSize),
 		srcNodes:    make(map[ProtocolVersion]*srcNodeInfo),

graph/db/test_postgres.go

@@ -7,7 +7,6 @@ import (
 	"testing"
 
 	"github.com/btcsuite/btcd/chaincfg"
-	"github.com/lightningnetwork/lnd/kvdb"
 	"github.com/lightningnetwork/lnd/sqldb"
 	"github.com/stretchr/testify/require"
 )
@@ -16,14 +15,6 @@ import (
 // database for testing. At the moment, it embeds a KVStore but once the
 // SQLStore fully implements the V1Store interface, the KVStore will be removed.
 func NewTestDB(t testing.TB) V1Store {
-	backend, backendCleanup, err := kvdb.GetTestBackend(t.TempDir(), "cgr")
-	require.NoError(t, err)
-
-	t.Cleanup(backendCleanup)
-
-	graphStore, err := NewKVStore(backend)
-	require.NoError(t, err)
-
 	pgFixture := sqldb.NewTestPgFixture(
 		t, sqldb.DefaultPostgresFixtureLifetime,
 	)
@@ -42,7 +33,7 @@ func NewTestDB(t testing.TB) V1Store {
 	store, err := NewSQLStore(
 		&SQLStoreConfig{
 			ChainHash: *chaincfg.MainNetParams.GenesisHash,
-		}, executor, graphStore,
+		}, executor,
 	)
 	require.NoError(t, err)
 

graph/db/test_sqlite.go

@@ -7,7 +7,6 @@ import (
 	"testing"
 
 	"github.com/btcsuite/btcd/chaincfg"
-	"github.com/lightningnetwork/lnd/kvdb"
 	"github.com/lightningnetwork/lnd/sqldb"
 	"github.com/stretchr/testify/require"
 )
@@ -16,14 +15,6 @@ import (
 // database for testing. At the moment, it embeds a KVStore but once the
 // SQLStore fully implements the V1Store interface, the KVStore will be removed.
 func NewTestDB(t testing.TB) V1Store {
-	backend, backendCleanup, err := kvdb.GetTestBackend(t.TempDir(), "cgr")
-	require.NoError(t, err)
-
-	t.Cleanup(backendCleanup)
-
-	graphStore, err := NewKVStore(backend)
-	require.NoError(t, err)
-
 	db := sqldb.NewTestSqliteDB(t).BaseDB
 
 	executor := sqldb.NewTransactionExecutor(
@@ -35,7 +26,7 @@ func NewTestDB(t testing.TB) V1Store {
 	store, err := NewSQLStore(
 		&SQLStoreConfig{
 			ChainHash: *chaincfg.MainNetParams.GenesisHash,
-		}, executor, graphStore,
+		}, executor,
 	)
 	require.NoError(t, err)