channeldb+lnwallet: save initial balances during channel opening

channeldb/channel.go

@@ -129,9 +129,9 @@ var (
 	// bucket for a given channel.
 	frozenChanKey = []byte("frozen-chans")
 
-	// lastWasRevokeKey is a key that stores true when the last update we sent
-	// was a revocation and false when it was a commitment signature. This is
-	// nil in the case of new channels with no updates exchanged.
+	// lastWasRevokeKey is a key that stores true when the last update we
+	// sent was a revocation and false when it was a commitment signature.
+	// This is nil in the case of new channels with no updates exchanged.
 	lastWasRevokeKey = []byte("last-was-revoke")
 )
 
@@ -657,6 +657,15 @@ type OpenChannel struct {
 	// received within this channel.
 	TotalMSatReceived lnwire.MilliSatoshi
 
+	// InitialLocalBalance is the balance we have during the channel
+	// opening. When we are not the initiator, this value represents the
+	// push amount.
+	InitialLocalBalance lnwire.MilliSatoshi
+
+	// InitialRemoteBalance is the balance they have during the channel
+	// opening.
+	InitialRemoteBalance lnwire.MilliSatoshi
+
 	// LocalChanCfg is the channel configuration for the local node.
 	LocalChanCfg ChannelConfig
 
@@ -3322,7 +3331,8 @@ func putChanInfo(chanBucket kvdb.RwBucket, channel *OpenChannel) error {
 		channel.chanStatus, channel.FundingBroadcastHeight,
 		channel.NumConfsRequired, channel.ChannelFlags,
 		channel.IdentityPub, channel.Capacity, channel.TotalMSatSent,
-		channel.TotalMSatReceived,
+		channel.TotalMSatReceived, channel.InitialLocalBalance,
+		channel.InitialRemoteBalance,
 	); err != nil {
 		return err
 	}
@@ -3509,7 +3519,8 @@ func fetchChanInfo(chanBucket kvdb.RBucket, channel *OpenChannel) error {
 		&channel.chanStatus, &channel.FundingBroadcastHeight,
 		&channel.NumConfsRequired, &channel.ChannelFlags,
 		&channel.IdentityPub, &channel.Capacity, &channel.TotalMSatSent,
-		&channel.TotalMSatReceived,
+		&channel.TotalMSatReceived, &channel.InitialLocalBalance,
+		&channel.InitialRemoteBalance,
 	); err != nil {
 		return err
 	}

channeldb/channel_test.go

@@ -352,6 +352,8 @@ func createTestChannelState(t *testing.T, cdb *ChannelStateDB) *OpenChannel {
 		Packager:                NewChannelPackager(chanID),
 		FundingTxn:              channels.TestFundingTx,
 		ThawHeight:              uint32(defaultPendingHeight),
+		InitialLocalBalance:     lnwire.MilliSatoshi(9000),
+		InitialRemoteBalance:    lnwire.MilliSatoshi(3000),
 	}
 }
 

lnwallet/reservation.go

@@ -403,8 +403,10 @@ func NewChannelReservation(capacity, localFundingAmt btcutil.Amount,
 				FeePerKw:      btcutil.Amount(commitFeePerKw),
 				CommitFee:     commitFee,
 			},
-			ThawHeight: thawHeight,
-			Db:         wallet.Cfg.Database,
+			ThawHeight:           thawHeight,
+			Db:                   wallet.Cfg.Database,
+			InitialLocalBalance:  ourBalance,
+			InitialRemoteBalance: theirBalance,
 		},
 		pushMSat:      pushMSat,
 		pendingChanID: pendingChanID,