chanbackup: support backup restore of script enforced leased channels

chanrestore.go

@@ -149,6 +149,12 @@ func (c *chanDBRestorer) openChannelShell(backup chanbackup.Single) (
 		chanType |= channeldb.AnchorOutputsBit
 		chanType |= channeldb.SingleFunderTweaklessBit
 
+	case chanbackup.ScriptEnforcedLeaseVersion:
+		chanType = channeldb.LeaseExpirationBit
+		chanType |= channeldb.ZeroHtlcTxFeeBit
+		chanType |= channeldb.AnchorOutputsBit
+		chanType |= channeldb.SingleFunderTweaklessBit
+
 	default:
 		return nil, fmt.Errorf("unknown Single version: %v", err)
 	}
@@ -172,6 +178,7 @@ func (c *chanDBRestorer) openChannelShell(backup chanbackup.Single) (
 			RemoteCurrentRevocation: backup.RemoteNodePub,
 			RevocationStore:         shachain.NewRevocationStore(),
 			RevocationProducer:      shaChainProducer,
+			ThawHeight:              backup.LeaseExpiry,
 		},
 	}