Use type uint8 to replace boolean fields in response

client/client.go

@@ -105,7 +105,7 @@ func (c *Client) Call(ctx context.Context, rcvr, method string, arg interface{},
 	c.chMtx.Unlock()
 
 	// If response is an error, return error
-	if resp.IsError {
+	if resp.Type == types.ResponseTypeError {
 		return errors.New(resp.Error)
 	}
 
@@ -118,7 +118,7 @@ func (c *Client) Call(ctx context.Context, rcvr, method string, arg interface{},
 	retVal := reflect.ValueOf(ret)
 
 	// If response is a channel
-	if resp.IsChannel {
+	if resp.Type == types.ResponseTypeChannel {
 		// If return value is not a channel, return error
 		if retVal.Kind() != reflect.Chan {
 			return ErrReturnNotChannel
@@ -137,7 +137,7 @@ func (c *Client) Call(ctx context.Context, rcvr, method string, arg interface{},
 			// For every value received from channel
 			for val := range c.chs[chID] {
 				//s := time.Now()
-				if val.ChannelDone {
+				if val.Type == types.ResponseTypeChannelDone {
 					// Close and delete channel
 					c.chMtx.Lock()
 					close(c.chs[chID])

internal/types/types.go

@@ -26,12 +26,18 @@ type Request struct {
 	Arg      any
 }
 
+type ResponseType uint8
+
+const (
+	ResponseTypeError ResponseType = iota
+	ResponseTypeChannel
+	ResponseTypeChannelDone
+)
+
 // Response represents a response returned by the server
 type Response struct {
+	Type ResponseType
 	ID          string
-	ChannelDone bool
-	IsChannel   bool
-	IsError     bool
 	Error       string
 	Return      any
 }

server/server.go

@@ -312,7 +312,7 @@ func (s *Server) handleConn(c codec.Codec) {
 			// If function has created a channel
 			if ctx.isChannel {
 				// Set IsChannel to true
-				res.IsChannel = true
+				res.Type = types.ResponseTypeChannel
 				// Overwrite return value with channel ID
 				res.Return = ctx.channelID
 
@@ -342,8 +342,8 @@ func (s *Server) handleConn(c codec.Codec) {
 
 					codecMtx.Lock()
 					c.Encode(types.Response{
-						ID:          ctx.channelID,
-						ChannelDone: true,
+						Type: types.ResponseTypeChannelDone,
+						ID:   ctx.channelID,
 					})
 					codecMtx.Unlock()
 				}()
@@ -361,10 +361,10 @@ func (s *Server) handleConn(c codec.Codec) {
 func (s *Server) sendErr(c codec.Codec, req types.Request, val any, err error) {
 	// Encode error response using codec
 	c.Encode(types.Response{
-		ID:      req.ID,
-		IsError: true,
-		Error:   err.Error(),
-		Return:  val,
+		Type:   types.ResponseTypeError,
+		ID:     req.ID,
+		Error:  err.Error(),
+		Return: val,
 	})
 }