grpc: add shutdown call for external management (#957)

* grpc: add shutdown call for external management

* go mod: tidy

* glorious: suggestion

* Update engine/engine.go

Co-authored-by: Adrian Gallagher <adrian.gallagher@thrasher.io>

* Update engine/rpcserver.go

Co-authored-by: Adrian Gallagher <adrian.gallagher@thrasher.io>

* Update main.go

Co-authored-by: Adrian Gallagher <adrian.gallagher@thrasher.io>

* Update engine/rpcserver.go

Co-authored-by: Scott <gloriousCode@users.noreply.github.com>

Co-authored-by: Ryan O'Hara-Reid <ryan.oharareid@thrasher.io>
Co-authored-by: Adrian Gallagher <adrian.gallagher@thrasher.io>
Co-authored-by: Scott <gloriousCode@users.noreply.github.com>

gctrpc/rpc_grpc.pb.go

@@ -118,6 +118,7 @@ type GoCryptoTraderServiceClient interface {
 	CurrencyStateTradingPair(ctx context.Context, in *CurrencyStateTradingPairRequest, opts ...grpc.CallOption) (*GenericResponse, error)
 	GetFuturesPositions(ctx context.Context, in *GetFuturesPositionsRequest, opts ...grpc.CallOption) (*GetFuturesPositionsResponse, error)
 	GetCollateral(ctx context.Context, in *GetCollateralRequest, opts ...grpc.CallOption) (*GetCollateralResponse, error)
+	Shutdown(ctx context.Context, in *ShutdownRequest, opts ...grpc.CallOption) (*ShutdownResponse, error)
 }
 
 type goCryptoTraderServiceClient struct {
@@ -1130,6 +1131,15 @@ func (c *goCryptoTraderServiceClient) GetCollateral(ctx context.Context, in *Get
 	return out, nil
 }
 
+func (c *goCryptoTraderServiceClient) Shutdown(ctx context.Context, in *ShutdownRequest, opts ...grpc.CallOption) (*ShutdownResponse, error) {
+	out := new(ShutdownResponse)
+	err := c.cc.Invoke(ctx, "/gctrpc.GoCryptoTraderService/Shutdown", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // GoCryptoTraderServiceServer is the server API for GoCryptoTraderService service.
 // All implementations must embed UnimplementedGoCryptoTraderServiceServer
 // for forward compatibility
@@ -1230,6 +1240,7 @@ type GoCryptoTraderServiceServer interface {
 	CurrencyStateTradingPair(context.Context, *CurrencyStateTradingPairRequest) (*GenericResponse, error)
 	GetFuturesPositions(context.Context, *GetFuturesPositionsRequest) (*GetFuturesPositionsResponse, error)
 	GetCollateral(context.Context, *GetCollateralRequest) (*GetCollateralResponse, error)
+	Shutdown(context.Context, *ShutdownRequest) (*ShutdownResponse, error)
 	mustEmbedUnimplementedGoCryptoTraderServiceServer()
 }
 
@@ -1525,6 +1536,9 @@ func (UnimplementedGoCryptoTraderServiceServer) GetFuturesPositions(context.Cont
 func (UnimplementedGoCryptoTraderServiceServer) GetCollateral(context.Context, *GetCollateralRequest) (*GetCollateralResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method GetCollateral not implemented")
 }
+func (UnimplementedGoCryptoTraderServiceServer) Shutdown(context.Context, *ShutdownRequest) (*ShutdownResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Shutdown not implemented")
+}
 func (UnimplementedGoCryptoTraderServiceServer) mustEmbedUnimplementedGoCryptoTraderServiceServer() {}
 
 // UnsafeGoCryptoTraderServiceServer may be embedded to opt out of forward compatibility for this service.
@@ -3284,6 +3298,24 @@ func _GoCryptoTraderService_GetCollateral_Handler(srv interface{}, ctx context.C
 	return interceptor(ctx, in, info, handler)
 }
 
+func _GoCryptoTraderService_Shutdown_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(ShutdownRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(GoCryptoTraderServiceServer).Shutdown(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/gctrpc.GoCryptoTraderService/Shutdown",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(GoCryptoTraderServiceServer).Shutdown(ctx, req.(*ShutdownRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 // GoCryptoTraderService_ServiceDesc is the grpc.ServiceDesc for GoCryptoTraderService service.
 // It's only intended for direct use with grpc.RegisterService,
 // and not to be introspected or modified (even as a copy)
@@ -3651,6 +3683,10 @@ var GoCryptoTraderService_ServiceDesc = grpc.ServiceDesc{
 			MethodName: "GetCollateral",
 			Handler:    _GoCryptoTraderService_GetCollateral_Handler,
 		},
+		{
+			MethodName: "Shutdown",
+			Handler:    _GoCryptoTraderService_Shutdown_Handler,
+		},
 	},
 	Streams: []grpc.StreamDesc{
 		{