graph/db: use mainnet genisis hash in tests

In preparation for our SQL Graph store which wont explicitly store the
chain hash but will instead obtain it from the runtime config, we
replace the test chainhash value with that of the mainnet genesis hash.

graph/db/graph_test.go

@@ -19,6 +19,7 @@ import (
 	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/btcsuite/btcd/btcec/v2/ecdsa"
 	"github.com/btcsuite/btcd/btcutil"
+	"github.com/btcsuite/btcd/chaincfg"
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/btcsuite/btcd/wire"
 	"github.com/lightningnetwork/lnd/graph/db/models"
@@ -329,7 +330,7 @@ func TestEdgeInsertionDeletion(t *testing.T) {
 	require.NoError(t, err, "unable to generate node key")
 	edgeInfo := models.ChannelEdgeInfo{
 		ChannelID: chanID,
-		ChainHash: key,
+		ChainHash: *chaincfg.MainNetParams.GenesisHash,
 		AuthProof: &models.ChannelAuthProof{
 			NodeSig1Bytes:    testSig.Serialize(),
 			NodeSig2Bytes:    testSig.Serialize(),
@@ -409,7 +410,7 @@ func createEdge(height, txIndex uint32, txPosition uint16, outPointIndex uint32,
 	node2Pub, _ := node2.PubKey()
 	edgeInfo := models.ChannelEdgeInfo{
 		ChannelID: shortChanID.ToUint64(),
-		ChainHash: key,
+		ChainHash: *chaincfg.MainNetParams.GenesisHash,
 		AuthProof: &models.ChannelAuthProof{
 			NodeSig1Bytes:    testSig.Serialize(),
 			NodeSig2Bytes:    testSig.Serialize(),
@@ -652,7 +653,7 @@ func createChannelEdge(node1, node2 *models.LightningNode) (
 	// errors.
 	edgeInfo := &models.ChannelEdgeInfo{
 		ChannelID: chanID,
-		ChainHash: key,
+		ChainHash: *chaincfg.MainNetParams.GenesisHash,
 		AuthProof: &models.ChannelAuthProof{
 			NodeSig1Bytes:    testSig.Serialize(),
 			NodeSig2Bytes:    testSig.Serialize(),
@@ -1363,7 +1364,7 @@ func fillTestGraph(t testing.TB, graph *ChannelGraph, numNodes,
 
 			edgeInfo := models.ChannelEdgeInfo{
 				ChannelID: chanID,
-				ChainHash: key,
+				ChainHash: *chaincfg.MainNetParams.GenesisHash,
 				AuthProof: &models.ChannelAuthProof{
 					NodeSig1Bytes:    testSig.Serialize(),
 					NodeSig2Bytes:    testSig.Serialize(),
@@ -1545,7 +1546,7 @@ func TestGraphPruning(t *testing.T) {
 
 		edgeInfo := models.ChannelEdgeInfo{
 			ChannelID: chanID,
-			ChainHash: key,
+			ChainHash: *chaincfg.MainNetParams.GenesisHash,
 			AuthProof: &models.ChannelAuthProof{
 				NodeSig1Bytes:    testSig.Serialize(),
 				NodeSig2Bytes:    testSig.Serialize(),