multi: allow specifying max csv for locally initiated channels

fundingmanager.go

@@ -132,6 +132,9 @@ type reservationWithCtx struct {
 	remoteMaxValue lnwire.MilliSatoshi
 	remoteMaxHtlcs uint16
 
+	// maxLocalCsv is the maximum csv we will accept from the remote.
+	maxLocalCsv uint16
+
 	updateMtx   sync.RWMutex
 	lastUpdated time.Time
 
@@ -1404,6 +1407,7 @@ func (f *fundingManager) handleFundingOpen(peer lnpeer.Peer,
 		remoteMinHtlc:  minHtlc,
 		remoteMaxValue: remoteMaxValue,
 		remoteMaxHtlcs: maxHtlcs,
+		maxLocalCsv:    f.cfg.MaxLocalCSVDelay,
 		err:            make(chan error, 1),
 		peer:           peer,
 	}
@@ -1532,7 +1536,7 @@ func (f *fundingManager) handleFundingAccept(peer lnpeer.Peer,
 		CsvDelay:         msg.CsvDelay,
 	}
 	err = resCtx.reservation.CommitConstraints(
-		channelConstraints, f.cfg.MaxLocalCSVDelay,
+		channelConstraints, resCtx.maxLocalCsv,
 	)
 	if err != nil {
 		fndgLog.Warnf("Unacceptable channel constraints: %v", err)
@@ -3064,8 +3068,15 @@ func (f *fundingManager) handleInitFundingMsg(msg *initFundingMsg) {
 		remoteCsvDelay = msg.remoteCsvDelay
 		maxValue       = msg.maxValueInFlight
 		maxHtlcs       = msg.maxHtlcs
+		maxCSV         = msg.maxLocalCsv
 	)
 
+	// If no maximum CSV delay was set for this channel, we use our default
+	// value.
+	if maxCSV == 0 {
+		maxCSV = f.cfg.MaxLocalCSVDelay
+	}
+
 	// We'll determine our dust limit depending on which chain is active.
 	var ourDustLimit btcutil.Amount
 	switch f.cfg.RegisteredChains.PrimaryChain() {
@@ -3221,6 +3232,7 @@ func (f *fundingManager) handleInitFundingMsg(msg *initFundingMsg) {
 		remoteMinHtlc:  minHtlcIn,
 		remoteMaxValue: maxValue,
 		remoteMaxHtlcs: maxHtlcs,
+		maxLocalCsv:    maxCSV,
 		reservation:    reservation,
 		peer:           msg.peer,
 		updates:        msg.updates,

lnrpc/rpc.proto

@@ -1750,6 +1750,12 @@ message OpenChannelRequest {
     to the commitment transaction.
     */
     uint32 remote_max_htlcs = 16;
+
+    /*
+    Max local csv is the maximum csv delay we will allow for our own commitment
+    transaction.
+    */
+    uint32 max_local_csv = 17;
 }
 message OpenStatusUpdate {
     oneof update {

lnrpc/rpc.swagger.json

@@ -4617,6 +4617,11 @@
           "type": "integer",
           "format": "int64",
           "description": "The maximum number of concurrent HTLCs we will allow the remote party to add\nto the commitment transaction."
+        },
+        "max_local_csv": {
+          "type": "integer",
+          "format": "int64",
+          "description": "Max local csv is the maximum csv delay we will allow for our own commitment\ntransaction."
         }
       }
     },

rpcserver.go

@@ -1900,6 +1900,7 @@ func (r *rpcServer) parseOpenChannelReq(in *lnrpc.OpenChannelRequest,
 		shutdownScript:   script,
 		maxValueInFlight: maxValue,
 		maxHtlcs:         maxHtlcs,
+		maxLocalCsv:      uint16(in.MaxLocalCsv),
 	}, nil
 }
 

server.go

@@ -3384,6 +3384,10 @@ type openChanReq struct {
 
 	maxHtlcs uint16
 
+	// maxLocalCsv is the maximum local csv delay we will accept from our
+	// peer.
+	maxLocalCsv uint16
+
 	// TODO(roasbeef): add ability to specify channel constraints as well
 
 	// chanFunder is an optional channel funder that allows the caller to