diff --git a/staticaddr/protocol_version.go b/staticaddr/protocol_version.go
new file mode 100644
index 0000000..f4d1496
--- /dev/null
+++ b/staticaddr/protocol_version.go
@@ -0,0 +1,48 @@
+package staticaddr
+
+import (
+	looprpc "github.com/lightninglabs/loop/swapserverrpc"
+)
+
+// AddressProtocolVersion represents the protocol version (declared on rpc
+// level) that the client declared to us.
+type AddressProtocolVersion uint32
+
+const (
+	// ProtocolVersion_V0 indicates that the client is a legacy version
+	// that did not report its protocol version.
+	ProtocolVersion_V0 AddressProtocolVersion = 0
+
+	// stableRPCProtocolVersion defines the current stable RPC protocol
+	// version.
+	stableRPCProtocolVersion = looprpc.StaticAddressProtocolVersion_V0
+)
+
+var (
+	// currentRPCProtocolVersion holds the version of the RPC protocol
+	// that the client selected to use for new swaps. Shouldn't be lower
+	// than the previous protocol version.
+	currentRPCProtocolVersion = stableRPCProtocolVersion
+)
+
+// CurrentRPCProtocolVersion returns the RPC protocol version selected to be
+// used for new swaps.
+func CurrentRPCProtocolVersion() looprpc.StaticAddressProtocolVersion {
+	return currentRPCProtocolVersion
+}
+
+// Valid returns true if the value of the AddressProtocolVersion is valid.
+func (p AddressProtocolVersion) Valid() bool {
+	return p <= AddressProtocolVersion(stableRPCProtocolVersion)
+}
+
+// String returns the string representation of a protocol version.
+func (p AddressProtocolVersion) String() string {
+	switch p {
+	case ProtocolVersion_V0:
+		return "V0"
+
+	default:
+		return "Unknown"
+	}
+}
diff --git a/swapserverrpc/server.pb.go b/swapserverrpc/server.pb.go
index 2387052..649aee9 100644
--- a/swapserverrpc/server.pb.go
+++ b/swapserverrpc/server.pb.go
@@ -423,6 +423,52 @@ func (RoutingPlugin) EnumDescriptor() ([]byte, []int) {
 	return file_server_proto_rawDescGZIP(), []int{4}
 }
 
+// StaticAddressProtocolVersion represents the static address protocol version
+// the client adheres to.
+type StaticAddressProtocolVersion int32
+
+const (
+	// V0 is the initially released static address protocol version.
+	StaticAddressProtocolVersion_V0 StaticAddressProtocolVersion = 0
+)
+
+// Enum value maps for StaticAddressProtocolVersion.
+var (
+	StaticAddressProtocolVersion_name = map[int32]string{
+		0: "V0",
+	}
+	StaticAddressProtocolVersion_value = map[string]int32{
+		"V0": 0,
+	}
+)
+
+func (x StaticAddressProtocolVersion) Enum() *StaticAddressProtocolVersion {
+	p := new(StaticAddressProtocolVersion)
+	*p = x
+	return p
+}
+
+func (x StaticAddressProtocolVersion) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (StaticAddressProtocolVersion) Descriptor() protoreflect.EnumDescriptor {
+	return file_server_proto_enumTypes[5].Descriptor()
+}
+
+func (StaticAddressProtocolVersion) Type() protoreflect.EnumType {
+	return &file_server_proto_enumTypes[5]
+}
+
+func (x StaticAddressProtocolVersion) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use StaticAddressProtocolVersion.Descriptor instead.
+func (StaticAddressProtocolVersion) EnumDescriptor() ([]byte, []int) {
+	return file_server_proto_rawDescGZIP(), []int{5}
+}
+
 type ServerLoopOutRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -3147,96 +3193,99 @@ var file_server_proto_rawDesc = []byte{
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+	0x33,
 }
 
 var (
@@ -3251,7 +3300,7 @@ func file_server_proto_rawDescGZIP() []byte {
 	return file_server_proto_rawDescData
 }
 
-var file_server_proto_enumTypes = make([]protoimpl.EnumInfo, 5)
+var file_server_proto_enumTypes = make([]protoimpl.EnumInfo, 6)
 var file_server_proto_msgTypes = make([]protoimpl.MessageInfo, 34)
 var file_server_proto_goTypes = []interface{}{
 	(ProtocolVersion)(0),                      // 0: looprpc.ProtocolVersion
@@ -3259,48 +3308,49 @@ var file_server_proto_goTypes = []interface{}{
 	(RoutePaymentType)(0),                     // 2: looprpc.RoutePaymentType
 	(PaymentFailureReason)(0),                 // 3: looprpc.PaymentFailureReason
 	(RoutingPlugin)(0),                        // 4: looprpc.RoutingPlugin
-	(*ServerLoopOutRequest)(nil),              // 5: looprpc.ServerLoopOutRequest
-	(*ServerLoopOutResponse)(nil),             // 6: looprpc.ServerLoopOutResponse
-	(*ServerLoopOutQuoteRequest)(nil),         // 7: looprpc.ServerLoopOutQuoteRequest
-	(*ServerLoopOutQuote)(nil),                // 8: looprpc.ServerLoopOutQuote
-	(*ServerLoopOutTermsRequest)(nil),         // 9: looprpc.ServerLoopOutTermsRequest
-	(*ServerLoopOutTerms)(nil),                // 10: looprpc.ServerLoopOutTerms
-	(*ServerLoopInRequest)(nil),               // 11: looprpc.ServerLoopInRequest
-	(*ServerLoopInResponse)(nil),              // 12: looprpc.ServerLoopInResponse
-	(*ServerLoopInQuoteRequest)(nil),          // 13: looprpc.ServerLoopInQuoteRequest
-	(*ServerLoopInQuoteResponse)(nil),         // 14: looprpc.ServerLoopInQuoteResponse
-	(*ServerLoopInTermsRequest)(nil),          // 15: looprpc.ServerLoopInTermsRequest
-	(*ServerLoopInTerms)(nil),                 // 16: looprpc.ServerLoopInTerms
-	(*ServerLoopOutPushPreimageRequest)(nil),  // 17: looprpc.ServerLoopOutPushPreimageRequest
-	(*ServerLoopOutPushPreimageResponse)(nil), // 18: looprpc.ServerLoopOutPushPreimageResponse
-	(*SubscribeUpdatesRequest)(nil),           // 19: looprpc.SubscribeUpdatesRequest
-	(*SubscribeLoopOutUpdatesResponse)(nil),   // 20: looprpc.SubscribeLoopOutUpdatesResponse
-	(*SubscribeLoopInUpdatesResponse)(nil),    // 21: looprpc.SubscribeLoopInUpdatesResponse
-	(*RouteCancel)(nil),                       // 22: looprpc.RouteCancel
-	(*HtlcAttempt)(nil),                       // 23: looprpc.HtlcAttempt
-	(*CancelLoopOutSwapRequest)(nil),          // 24: looprpc.CancelLoopOutSwapRequest
-	(*CancelLoopOutSwapResponse)(nil),         // 25: looprpc.CancelLoopOutSwapResponse
-	(*ServerProbeRequest)(nil),                // 26: looprpc.ServerProbeRequest
-	(*ServerProbeResponse)(nil),               // 27: looprpc.ServerProbeResponse
-	(*RecommendRoutingPluginReq)(nil),         // 28: looprpc.RecommendRoutingPluginReq
-	(*RecommendRoutingPluginRes)(nil),         // 29: looprpc.RecommendRoutingPluginRes
-	(*ReportRoutingResultReq)(nil),            // 30: looprpc.ReportRoutingResultReq
-	(*ReportRoutingResultRes)(nil),            // 31: looprpc.ReportRoutingResultRes
-	(*MuSig2SignSweepReq)(nil),                // 32: looprpc.MuSig2SignSweepReq
-	(*PrevoutInfo)(nil),                       // 33: looprpc.PrevoutInfo
-	(*MuSig2SignSweepRes)(nil),                // 34: looprpc.MuSig2SignSweepRes
-	(*ServerPushKeyReq)(nil),                  // 35: looprpc.ServerPushKeyReq
-	(*ServerPushKeyRes)(nil),                  // 36: looprpc.ServerPushKeyRes
-	(*FetchL402Request)(nil),                  // 37: looprpc.FetchL402Request
-	(*FetchL402Response)(nil),                 // 38: looprpc.FetchL402Response
-	(*RouteHint)(nil),                         // 39: looprpc.RouteHint
+	(StaticAddressProtocolVersion)(0),         // 5: looprpc.StaticAddressProtocolVersion
+	(*ServerLoopOutRequest)(nil),              // 6: looprpc.ServerLoopOutRequest
+	(*ServerLoopOutResponse)(nil),             // 7: looprpc.ServerLoopOutResponse
+	(*ServerLoopOutQuoteRequest)(nil),         // 8: looprpc.ServerLoopOutQuoteRequest
+	(*ServerLoopOutQuote)(nil),                // 9: looprpc.ServerLoopOutQuote
+	(*ServerLoopOutTermsRequest)(nil),         // 10: looprpc.ServerLoopOutTermsRequest
+	(*ServerLoopOutTerms)(nil),                // 11: looprpc.ServerLoopOutTerms
+	(*ServerLoopInRequest)(nil),               // 12: looprpc.ServerLoopInRequest
+	(*ServerLoopInResponse)(nil),              // 13: looprpc.ServerLoopInResponse
+	(*ServerLoopInQuoteRequest)(nil),          // 14: looprpc.ServerLoopInQuoteRequest
+	(*ServerLoopInQuoteResponse)(nil),         // 15: looprpc.ServerLoopInQuoteResponse
+	(*ServerLoopInTermsRequest)(nil),          // 16: looprpc.ServerLoopInTermsRequest
+	(*ServerLoopInTerms)(nil),                 // 17: looprpc.ServerLoopInTerms
+	(*ServerLoopOutPushPreimageRequest)(nil),  // 18: looprpc.ServerLoopOutPushPreimageRequest
+	(*ServerLoopOutPushPreimageResponse)(nil), // 19: looprpc.ServerLoopOutPushPreimageResponse
+	(*SubscribeUpdatesRequest)(nil),           // 20: looprpc.SubscribeUpdatesRequest
+	(*SubscribeLoopOutUpdatesResponse)(nil),   // 21: looprpc.SubscribeLoopOutUpdatesResponse
+	(*SubscribeLoopInUpdatesResponse)(nil),    // 22: looprpc.SubscribeLoopInUpdatesResponse
+	(*RouteCancel)(nil),                       // 23: looprpc.RouteCancel
+	(*HtlcAttempt)(nil),                       // 24: looprpc.HtlcAttempt
+	(*CancelLoopOutSwapRequest)(nil),          // 25: looprpc.CancelLoopOutSwapRequest
+	(*CancelLoopOutSwapResponse)(nil),         // 26: looprpc.CancelLoopOutSwapResponse
+	(*ServerProbeRequest)(nil),                // 27: looprpc.ServerProbeRequest
+	(*ServerProbeResponse)(nil),               // 28: looprpc.ServerProbeResponse
+	(*RecommendRoutingPluginReq)(nil),         // 29: looprpc.RecommendRoutingPluginReq
+	(*RecommendRoutingPluginRes)(nil),         // 30: looprpc.RecommendRoutingPluginRes
+	(*ReportRoutingResultReq)(nil),            // 31: looprpc.ReportRoutingResultReq
+	(*ReportRoutingResultRes)(nil),            // 32: looprpc.ReportRoutingResultRes
+	(*MuSig2SignSweepReq)(nil),                // 33: looprpc.MuSig2SignSweepReq
+	(*PrevoutInfo)(nil),                       // 34: looprpc.PrevoutInfo
+	(*MuSig2SignSweepRes)(nil),                // 35: looprpc.MuSig2SignSweepRes
+	(*ServerPushKeyReq)(nil),                  // 36: looprpc.ServerPushKeyReq
+	(*ServerPushKeyRes)(nil),                  // 37: looprpc.ServerPushKeyRes
+	(*FetchL402Request)(nil),                  // 38: looprpc.FetchL402Request
+	(*FetchL402Response)(nil),                 // 39: looprpc.FetchL402Response
+	(*RouteHint)(nil),                         // 40: looprpc.RouteHint
 }
 var file_server_proto_depIdxs = []int32{
 	0,  // 0: looprpc.ServerLoopOutRequest.protocol_version:type_name -> looprpc.ProtocolVersion
 	0,  // 1: looprpc.ServerLoopOutQuoteRequest.protocol_version:type_name -> looprpc.ProtocolVersion
 	0,  // 2: looprpc.ServerLoopOutTermsRequest.protocol_version:type_name -> looprpc.ProtocolVersion
 	0,  // 3: looprpc.ServerLoopInRequest.protocol_version:type_name -> looprpc.ProtocolVersion
-	39, // 4: looprpc.ServerLoopInQuoteRequest.route_hints:type_name -> looprpc.RouteHint
+	40, // 4: looprpc.ServerLoopInQuoteRequest.route_hints:type_name -> looprpc.RouteHint
 	0,  // 5: looprpc.ServerLoopInQuoteRequest.protocol_version:type_name -> looprpc.ProtocolVersion
 	0,  // 6: looprpc.ServerLoopInTermsRequest.protocol_version:type_name -> looprpc.ProtocolVersion
 	0,  // 7: looprpc.ServerLoopOutPushPreimageRequest.protocol_version:type_name -> looprpc.ProtocolVersion
@@ -3308,51 +3358,51 @@ var file_server_proto_depIdxs = []int32{
 	1,  // 9: looprpc.SubscribeLoopOutUpdatesResponse.state:type_name -> looprpc.ServerSwapState
 	1,  // 10: looprpc.SubscribeLoopInUpdatesResponse.state:type_name -> looprpc.ServerSwapState
 	2,  // 11: looprpc.RouteCancel.route_type:type_name -> looprpc.RoutePaymentType
-	23, // 12: looprpc.RouteCancel.attempts:type_name -> looprpc.HtlcAttempt
+	24, // 12: looprpc.RouteCancel.attempts:type_name -> looprpc.HtlcAttempt
 	3,  // 13: looprpc.RouteCancel.failure:type_name -> looprpc.PaymentFailureReason
 	0,  // 14: looprpc.CancelLoopOutSwapRequest.protocol_version:type_name -> looprpc.ProtocolVersion
-	22, // 15: looprpc.CancelLoopOutSwapRequest.route_cancel:type_name -> looprpc.RouteCancel
+	23, // 15: looprpc.CancelLoopOutSwapRequest.route_cancel:type_name -> looprpc.RouteCancel
 	0,  // 16: looprpc.ServerProbeRequest.protocol_version:type_name -> looprpc.ProtocolVersion
-	39, // 17: looprpc.ServerProbeRequest.route_hints:type_name -> looprpc.RouteHint
+	40, // 17: looprpc.ServerProbeRequest.route_hints:type_name -> looprpc.RouteHint
 	0,  // 18: looprpc.RecommendRoutingPluginReq.protocol_version:type_name -> looprpc.ProtocolVersion
 	4,  // 19: looprpc.RecommendRoutingPluginRes.plugin:type_name -> looprpc.RoutingPlugin
 	0,  // 20: looprpc.ReportRoutingResultReq.protocol_version:type_name -> looprpc.ProtocolVersion
 	4,  // 21: looprpc.ReportRoutingResultReq.plugin:type_name -> looprpc.RoutingPlugin
 	0,  // 22: looprpc.MuSig2SignSweepReq.protocol_version:type_name -> looprpc.ProtocolVersion
-	33, // 23: looprpc.MuSig2SignSweepReq.prevout_info:type_name -> looprpc.PrevoutInfo
+	34, // 23: looprpc.MuSig2SignSweepReq.prevout_info:type_name -> looprpc.PrevoutInfo
 	0,  // 24: looprpc.ServerPushKeyReq.protocol_version:type_name -> looprpc.ProtocolVersion
-	9,  // 25: looprpc.SwapServer.LoopOutTerms:input_type -> looprpc.ServerLoopOutTermsRequest
-	5,  // 26: looprpc.SwapServer.NewLoopOutSwap:input_type -> looprpc.ServerLoopOutRequest
-	17, // 27: looprpc.SwapServer.LoopOutPushPreimage:input_type -> looprpc.ServerLoopOutPushPreimageRequest
-	7,  // 28: looprpc.SwapServer.LoopOutQuote:input_type -> looprpc.ServerLoopOutQuoteRequest
-	15, // 29: looprpc.SwapServer.LoopInTerms:input_type -> looprpc.ServerLoopInTermsRequest
-	11, // 30: looprpc.SwapServer.NewLoopInSwap:input_type -> looprpc.ServerLoopInRequest
-	13, // 31: looprpc.SwapServer.LoopInQuote:input_type -> looprpc.ServerLoopInQuoteRequest
-	19, // 32: looprpc.SwapServer.SubscribeLoopOutUpdates:input_type -> looprpc.SubscribeUpdatesRequest
-	19, // 33: looprpc.SwapServer.SubscribeLoopInUpdates:input_type -> looprpc.SubscribeUpdatesRequest
-	24, // 34: looprpc.SwapServer.CancelLoopOutSwap:input_type -> looprpc.CancelLoopOutSwapRequest
-	26, // 35: looprpc.SwapServer.Probe:input_type -> looprpc.ServerProbeRequest
-	28, // 36: looprpc.SwapServer.RecommendRoutingPlugin:input_type -> looprpc.RecommendRoutingPluginReq
-	30, // 37: looprpc.SwapServer.ReportRoutingResult:input_type -> looprpc.ReportRoutingResultReq
-	32, // 38: looprpc.SwapServer.MuSig2SignSweep:input_type -> looprpc.MuSig2SignSweepReq
-	35, // 39: looprpc.SwapServer.PushKey:input_type -> looprpc.ServerPushKeyReq
-	37, // 40: looprpc.SwapServer.FetchL402:input_type -> looprpc.FetchL402Request
-	10, // 41: looprpc.SwapServer.LoopOutTerms:output_type -> looprpc.ServerLoopOutTerms
-	6,  // 42: looprpc.SwapServer.NewLoopOutSwap:output_type -> looprpc.ServerLoopOutResponse
-	18, // 43: looprpc.SwapServer.LoopOutPushPreimage:output_type -> looprpc.ServerLoopOutPushPreimageResponse
-	8,  // 44: looprpc.SwapServer.LoopOutQuote:output_type -> looprpc.ServerLoopOutQuote
-	16, // 45: looprpc.SwapServer.LoopInTerms:output_type -> looprpc.ServerLoopInTerms
-	12, // 46: looprpc.SwapServer.NewLoopInSwap:output_type -> looprpc.ServerLoopInResponse
-	14, // 47: looprpc.SwapServer.LoopInQuote:output_type -> looprpc.ServerLoopInQuoteResponse
-	20, // 48: looprpc.SwapServer.SubscribeLoopOutUpdates:output_type -> looprpc.SubscribeLoopOutUpdatesResponse
-	21, // 49: looprpc.SwapServer.SubscribeLoopInUpdates:output_type -> looprpc.SubscribeLoopInUpdatesResponse
-	25, // 50: looprpc.SwapServer.CancelLoopOutSwap:output_type -> looprpc.CancelLoopOutSwapResponse
-	27, // 51: looprpc.SwapServer.Probe:output_type -> looprpc.ServerProbeResponse
-	29, // 52: looprpc.SwapServer.RecommendRoutingPlugin:output_type -> looprpc.RecommendRoutingPluginRes
-	31, // 53: looprpc.SwapServer.ReportRoutingResult:output_type -> looprpc.ReportRoutingResultRes
-	34, // 54: looprpc.SwapServer.MuSig2SignSweep:output_type -> looprpc.MuSig2SignSweepRes
-	36, // 55: looprpc.SwapServer.PushKey:output_type -> looprpc.ServerPushKeyRes
-	38, // 56: looprpc.SwapServer.FetchL402:output_type -> looprpc.FetchL402Response
+	10, // 25: looprpc.SwapServer.LoopOutTerms:input_type -> looprpc.ServerLoopOutTermsRequest
+	6,  // 26: looprpc.SwapServer.NewLoopOutSwap:input_type -> looprpc.ServerLoopOutRequest
+	18, // 27: looprpc.SwapServer.LoopOutPushPreimage:input_type -> looprpc.ServerLoopOutPushPreimageRequest
+	8,  // 28: looprpc.SwapServer.LoopOutQuote:input_type -> looprpc.ServerLoopOutQuoteRequest
+	16, // 29: looprpc.SwapServer.LoopInTerms:input_type -> looprpc.ServerLoopInTermsRequest
+	12, // 30: looprpc.SwapServer.NewLoopInSwap:input_type -> looprpc.ServerLoopInRequest
+	14, // 31: looprpc.SwapServer.LoopInQuote:input_type -> looprpc.ServerLoopInQuoteRequest
+	20, // 32: looprpc.SwapServer.SubscribeLoopOutUpdates:input_type -> looprpc.SubscribeUpdatesRequest
+	20, // 33: looprpc.SwapServer.SubscribeLoopInUpdates:input_type -> looprpc.SubscribeUpdatesRequest
+	25, // 34: looprpc.SwapServer.CancelLoopOutSwap:input_type -> looprpc.CancelLoopOutSwapRequest
+	27, // 35: looprpc.SwapServer.Probe:input_type -> looprpc.ServerProbeRequest
+	29, // 36: looprpc.SwapServer.RecommendRoutingPlugin:input_type -> looprpc.RecommendRoutingPluginReq
+	31, // 37: looprpc.SwapServer.ReportRoutingResult:input_type -> looprpc.ReportRoutingResultReq
+	33, // 38: looprpc.SwapServer.MuSig2SignSweep:input_type -> looprpc.MuSig2SignSweepReq
+	36, // 39: looprpc.SwapServer.PushKey:input_type -> looprpc.ServerPushKeyReq
+	38, // 40: looprpc.SwapServer.FetchL402:input_type -> looprpc.FetchL402Request
+	11, // 41: looprpc.SwapServer.LoopOutTerms:output_type -> looprpc.ServerLoopOutTerms
+	7,  // 42: looprpc.SwapServer.NewLoopOutSwap:output_type -> looprpc.ServerLoopOutResponse
+	19, // 43: looprpc.SwapServer.LoopOutPushPreimage:output_type -> looprpc.ServerLoopOutPushPreimageResponse
+	9,  // 44: looprpc.SwapServer.LoopOutQuote:output_type -> looprpc.ServerLoopOutQuote
+	17, // 45: looprpc.SwapServer.LoopInTerms:output_type -> looprpc.ServerLoopInTerms
+	13, // 46: looprpc.SwapServer.NewLoopInSwap:output_type -> looprpc.ServerLoopInResponse
+	15, // 47: looprpc.SwapServer.LoopInQuote:output_type -> looprpc.ServerLoopInQuoteResponse
+	21, // 48: looprpc.SwapServer.SubscribeLoopOutUpdates:output_type -> looprpc.SubscribeLoopOutUpdatesResponse
+	22, // 49: looprpc.SwapServer.SubscribeLoopInUpdates:output_type -> looprpc.SubscribeLoopInUpdatesResponse
+	26, // 50: looprpc.SwapServer.CancelLoopOutSwap:output_type -> looprpc.CancelLoopOutSwapResponse
+	28, // 51: looprpc.SwapServer.Probe:output_type -> looprpc.ServerProbeResponse
+	30, // 52: looprpc.SwapServer.RecommendRoutingPlugin:output_type -> looprpc.RecommendRoutingPluginRes
+	32, // 53: looprpc.SwapServer.ReportRoutingResult:output_type -> looprpc.ReportRoutingResultRes
+	35, // 54: looprpc.SwapServer.MuSig2SignSweep:output_type -> looprpc.MuSig2SignSweepRes
+	37, // 55: looprpc.SwapServer.PushKey:output_type -> looprpc.ServerPushKeyRes
+	39, // 56: looprpc.SwapServer.FetchL402:output_type -> looprpc.FetchL402Response
 	41, // [41:57] is the sub-list for method output_type
 	25, // [25:41] is the sub-list for method input_type
 	25, // [25:25] is the sub-list for extension type_name
@@ -3784,7 +3834,7 @@ func file_server_proto_init() {
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_server_proto_rawDesc,
-			NumEnums:      5,
+			NumEnums:      6,
 			NumMessages:   34,
 			NumExtensions: 0,
 			NumServices:   1,
diff --git a/swapserverrpc/server.proto b/swapserverrpc/server.proto
index 63a50b4..9362b88 100644
--- a/swapserverrpc/server.proto
+++ b/swapserverrpc/server.proto
@@ -645,4 +645,11 @@ message FetchL402Request {
 // FetchL402Response is an empty response sent from the server to the client to
 // confirm the lnd l402.
 message FetchL402Response {
+}
+
+// StaticAddressProtocolVersion represents the static address protocol version
+// the client adheres to.
+enum StaticAddressProtocolVersion {
+    // V0 is the initially released static address protocol version.
+    V0 = 0;
 }
\ No newline at end of file