graph/db: provide SQLStore with chainhash

In this commit, we introduce a SQLStoreConfig struct which for the time
being only has the ChainHash of the genesis block of the chain this node
is running on. This is used to reconstruct lnwire messages from what we
have persisted in the DB. This means we dont need need to persist the
chain-hash of gossip messages since we know it will always be the same
for a given node. If a node were to be started with a different network,
the lnwire messages it reconstructs for gossip will be invalid.

Author: ellemouton

graph/db/sql_store.go

@@ -14,6 +14,7 @@ import (
 	"time"
 
 	"github.com/btcsuite/btcd/btcec/v2"
+	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/lightningnetwork/lnd/batch"
 	"github.com/lightningnetwork/lnd/graph/db/models"
 	"github.com/lightningnetwork/lnd/lnwire"
@@ -96,7 +97,8 @@ type BatchedSQLQueries interface {
 // implemented,  things will fall back to the KVStore. This is ONLY the case
 // for the time being while this struct is purely used in unit tests only.
 type SQLStore struct {
-	db BatchedSQLQueries
+	cfg *SQLStoreConfig
+	db  BatchedSQLQueries
 
 	// cacheMu guards all caches (rejectCache and chanCache). If
 	// this mutex will be acquired at the same time as the DB mutex then
@@ -117,9 +119,16 @@ type SQLStore struct {
 // interface.
 var _ V1Store = (*SQLStore)(nil)
 
+// SQLStoreConfig holds the configuration for the SQLStore.
+type SQLStoreConfig struct {
+	// ChainHash is the genesis hash for the chain that all the gossip
+	// messages in this store are aimed at.
+	ChainHash chainhash.Hash
+}
+
 // NewSQLStore creates a new SQLStore instance given an open BatchedSQLQueries
 // storage backend.
-func NewSQLStore(db BatchedSQLQueries, kvStore *KVStore,
+func NewSQLStore(cfg *SQLStoreConfig, db BatchedSQLQueries, kvStore *KVStore,
 	options ...StoreOptionModifier) (*SQLStore, error) {
 
 	opts := DefaultOptions()
@@ -133,6 +142,7 @@ func NewSQLStore(db BatchedSQLQueries, kvStore *KVStore,
 	}
 
 	s := &SQLStore{
+		cfg:         cfg,
 		db:          db,
 		KVStore:     kvStore,
 		rejectCache: newRejectCache(opts.RejectCacheSize),

graph/db/test_postgres.go

@@ -6,6 +6,7 @@ import (
 	"database/sql"
 	"testing"
 
+	"github.com/btcsuite/btcd/chaincfg"
 	"github.com/lightningnetwork/lnd/kvdb"
 	"github.com/lightningnetwork/lnd/sqldb"
 	"github.com/stretchr/testify/require"
@@ -38,7 +39,11 @@ func NewTestDB(t testing.TB) V1Store {
 		},
 	)
 
-	store, err := NewSQLStore(executor, graphStore)
+	store, err := NewSQLStore(
+		&SQLStoreConfig{
+			ChainHash: *chaincfg.MainNetParams.GenesisHash,
+		}, executor, graphStore,
+	)
 	require.NoError(t, err)
 
 	return store

graph/db/test_sqlite.go

@@ -6,6 +6,7 @@ import (
 	"database/sql"
 	"testing"
 
+	"github.com/btcsuite/btcd/chaincfg"
 	"github.com/lightningnetwork/lnd/kvdb"
 	"github.com/lightningnetwork/lnd/sqldb"
 	"github.com/stretchr/testify/require"
@@ -31,7 +32,11 @@ func NewTestDB(t testing.TB) V1Store {
 		},
 	)
 
-	store, err := NewSQLStore(executor, graphStore)
+	store, err := NewSQLStore(
+		&SQLStoreConfig{
+			ChainHash: *chaincfg.MainNetParams.GenesisHash,
+		}, executor, graphStore,
+	)
 	require.NoError(t, err)
 
 	return store