netann: update ChanAnn2 validation to work for P2WSH channels

This commit expands the ChannelAnnouncement2 validation for the case
where it is announcing a P2WSH channel.

discovery/gossiper_test.go

@@ -18,6 +18,7 @@ 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/davecgh/go-spew/spew"
@@ -620,6 +621,7 @@ func createUpdateAnnouncement(blockHeight uint32,
 
 	htlcMinMsat := lnwire.MilliSatoshi(100)
 	a := &lnwire.ChannelUpdate1{
+		ChainHash: *chaincfg.MainNetParams.GenesisHash,
 		ShortChannelID: lnwire.ShortChannelID{
 			BlockHeight: blockHeight,
 		},
@@ -772,6 +774,7 @@ func (ctx *testCtx) createAnnouncementWithoutProof(blockHeight uint32,
 	}
 
 	a := &lnwire.ChannelAnnouncement1{
+		ChainHash: *chaincfg.MainNetParams.GenesisHash,
 		ShortChannelID: lnwire.ShortChannelID{
 			BlockHeight: blockHeight,
 			TxIndex:     0,
@@ -938,8 +941,9 @@ func createTestCtx(t *testing.T, startHeight uint32, isChanPeer bool) (
 	}
 
 	gossiper := New(Config{
-		ChainIO:  chain,
-		Notifier: notifier,
+		ChainIO:     chain,
+		ChainParams: &chaincfg.MainNetParams,
+		Notifier:    notifier,
 		Broadcast: func(senders map[route.Vertex]struct{},
 			msgs ...lnwire.Message) error {
 
@@ -1669,6 +1673,7 @@ func TestSignatureAnnouncementRetryAtStartup(t *testing.T) {
 
 	//nolint:ll
 	gossiper := New(Config{
+		ChainParams:            &chaincfg.MainNetParams,
 		Notifier:               tCtx.gossiper.cfg.Notifier,
 		Broadcast:              tCtx.gossiper.cfg.Broadcast,
 		NotifyWhenOnline:       tCtx.gossiper.reliableSender.cfg.NotifyWhenOnline,