lnwire: allow up to 35-bytes in pkScripts to account for P2WSH

lnwire/lnwire.go

@@ -169,9 +169,10 @@ func writeElement(w io.Writer, element interface{}) error {
 			return err
 		}
 	case PkScript:
-		// Make sure it's P2PKH or P2SH size or less.
+		// The largest script we'll accept is a p2wsh which is exactly
+		// 34 bytes long.
 		scriptLength := len(e)
-		if scriptLength > 25 {
+		if scriptLength > 34 {
 			return fmt.Errorf("'PkScript' too long")
 		}
 
@@ -425,7 +426,7 @@ func readElement(r io.Reader, element interface{}) error {
 			return err
 		}
 	case *PkScript:
-		pkScript, err := wire.ReadVarBytes(r, 0, 25, "pkscript")
+		pkScript, err := wire.ReadVarBytes(r, 0, 34, "pkscript")
 		if err != nil {
 			return err
 		}

lnwire/node_announcement.go

@@ -153,20 +153,7 @@ func (a *NodeAnnouncement) MsgType() MessageType {
 //
 // This is part of the lnwire.Message interface.
 func (a *NodeAnnouncement) MaxPayloadLength(pver uint32) uint32 {
-	// Signature - 64 bytes
-	// Timestamp - 4 bytes
-	// NodeID - 33 bytes
-	// RGBColor - 3 bytes
-	// Alias - 32 bytes
-	// Features - variable
-	// NumAddresses - 2 bytes
-	// AddressDescriptor - 1 byte
-	// Ipv4 - 4 bytes (optional)
-	// Ipv6 - 16 bytes (optional)
-	// Port - 2 bytes (optional)
-
-	// Base size, 140, but can be variable due to multiple addresses
-	return 8192
+	return 65533
 }
 
 // DataToSign returns the part of the message that should be signed.

lnwire/single_funding_request.go

@@ -147,7 +147,7 @@ func (c *SingleFundingRequest) Encode(w io.Writer, pver uint32) error {
 		c.ConfirmationDepth)
 }
 
-// Command returns the uint32 code which uniquely identifies this message as a
+// MsgType returns the uint32 code which uniquely identifies this message as a
 // SingleFundingRequest on the wire.
 //
 // This is part of the lnwire.Message interface.
@@ -191,8 +191,8 @@ func (c *SingleFundingRequest) MaxPayloadLength(uint32) uint32 {
 	// ChannelDerivationPoint - 33 bytes
 	length += 33
 
-	// DeliveryPkScript - 25 bytes
-	length += 25
+	// DeliveryPkScript - 34 bytes + 1 byte varInt
+	length += 35
 
 	// DustLimit - 8 bytes
 	length += 8

lnwire/single_funding_response.go

@@ -145,8 +145,8 @@ func (c *SingleFundingResponse) MaxPayloadLength(uint32) uint32 {
 	// CsvDelay - 4 bytes
 	length += 4
 
-	// DeliveryPkScript - 25 bytes
-	length += 25
+	// DeliveryPkScript - 34 bytes + 1 varInt
+	length += 35
 
 	// DustLimit - 8 bytes
 	length += 8