chore(requestid): wrap requestid string in a struct

Author: rvagg

graphsync.go

@@ -13,7 +13,7 @@ import (
 )
 
 // RequestID is a unique identifier for a GraphSync request.
-type RequestID string
+type RequestID struct{ string }
 
 // Tag returns an easy way to identify this request id as a graphsync request (for libp2p connections)
 func (r RequestID) Tag() string {
@@ -22,13 +22,27 @@ func (r RequestID) Tag() string {
 
 // String form of a RequestID (should be a well-formed UUIDv4 string)
 func (r RequestID) String() string {
-	return uuid.Must(uuid.FromBytes([]byte(r))).String()
+	return uuid.Must(uuid.FromBytes([]byte(r.string))).String()
+}
+
+// Byte form of a RequestID
+func (r RequestID) Bytes() []byte {
+	return []byte(r.string)
 }
 
 // Create a new, random RequestID (should be a UUIDv4)
 func NewRequestID() RequestID {
 	u := uuid.New()
-	return RequestID(u[:])
+	return RequestID{string(u[:])}
+}
+
+// Create a RequestID from a byte slice
+func ParseRequestID(b []byte) (RequestID, error) {
+	_, err := uuid.FromBytes(b)
+	if err != nil {
+		return RequestID{}, err
+	}
+	return RequestID{string(b)}, nil
 }
 
 // Priority a priority for a GraphSync request.

message/message.go

@@ -5,7 +5,6 @@ import (
 	"errors"
 	"io"
 
-	"github.com/google/uuid"
 	blocks "github.com/ipfs/go-block-format"
 	cid "github.com/ipfs/go-cid"
 	"github.com/ipld/go-ipld-prime"
@@ -162,11 +161,10 @@ func newMessageFromProto(pbm *pb.Message) (GraphSyncMessage, error) {
 		if exts == nil {
 			exts = make(map[string][]byte)
 		}
-		uid, err := uuid.FromBytes(req.Id)
+		id, err := graphsync.ParseRequestID(req.Id)
 		if err != nil {
 			return GraphSyncMessage{}, err
 		}
-		id := graphsync.RequestID(uid[:])
 		requests[id] = newRequest(id, root, selector, graphsync.Priority(req.Priority), req.Cancel, req.Update, exts)
 	}
 
@@ -179,11 +177,10 @@ func newMessageFromProto(pbm *pb.Message) (GraphSyncMessage, error) {
 		if exts == nil {
 			exts = make(map[string][]byte)
 		}
-		uid, err := uuid.FromBytes(res.Id)
+		id, err := graphsync.ParseRequestID(res.Id)
 		if err != nil {
 			return GraphSyncMessage{}, err
 		}
-		id := graphsync.RequestID(uid[:])
 		responses[id] = newResponse(id, graphsync.ResponseStatusCode(res.Status), exts)
 	}
 
@@ -280,7 +277,7 @@ func (gsm GraphSyncMessage) ToProto() (*pb.Message, error) {
 			}
 		}
 		pbm.Requests = append(pbm.Requests, &pb.Message_Request{
-			Id:         []byte(request.id),
+			Id:         request.id.Bytes(),
 			Root:       request.root.Bytes(),
 			Selector:   selector,
 			Priority:   int32(request.priority),
@@ -293,7 +290,7 @@ func (gsm GraphSyncMessage) ToProto() (*pb.Message, error) {
 	pbm.Responses = make([]*pb.Message_Response, 0, len(gsm.responses))
 	for _, response := range gsm.responses {
 		pbm.Responses = append(pbm.Responses, &pb.Message_Response{
-			Id:         []byte(response.requestID),
+			Id:         response.requestID.Bytes(),
 			Status:     int32(response.status),
 			Extensions: response.extensions,
 		})

message/message_test.go

@@ -51,7 +51,7 @@ func TestAppendingRequests(t *testing.T) {
 	require.NoError(t, err)
 
 	pbRequest := pbMessage.Requests[0]
-	require.Equal(t, []byte(id), pbRequest.Id)
+	require.Equal(t, id.Bytes(), pbRequest.Id)
 	require.Equal(t, int32(priority), pbRequest.Priority)
 	require.False(t, pbRequest.Cancel)
 	require.False(t, pbRequest.Update)
@@ -102,7 +102,7 @@ func TestAppendingResponses(t *testing.T) {
 	pbMessage, err := gsm.ToProto()
 	require.NoError(t, err, "serialize to protobuf errored")
 	pbResponse := pbMessage.Responses[0]
-	require.Equal(t, []byte(requestID), pbResponse.Id)
+	require.Equal(t, requestID.Bytes(), pbResponse.Id)
 	require.Equal(t, int32(status), pbResponse.Status)
 	require.Equal(t, extension.Data, pbResponse.Extensions["graphsync/awesome"])