fix(query): get next send sequence for transfer packets (#4706)

* feat(packet): get next send sequence for transfer packets

* chore(channels): fixed tests for unordered sequence

* Update modules/core/04-channel/keeper/grpc_query_test.go

Co-authored-by: Carlos Rodriguez <carlos@interchain.io>

* chore: removed useless error handling

---------

Co-authored-by: Carlos Rodriguez <carlos@interchain.io>

Author: dzmitry-lahoda

modules/core/04-channel/keeper/grpc_query.go

@@ -555,26 +555,13 @@ func (k Keeper) NextSequenceSend(c context.Context, req *types.QueryNextSequence
 
 	ctx := sdk.UnwrapSDKContext(c)
 
-	channel, found := k.GetChannel(ctx, req.PortId, req.ChannelId)
+	sequence, found := k.GetNextSequenceSend(ctx, req.PortId, req.ChannelId)
 	if !found {
 		return nil, status.Error(
 			codes.NotFound,
-			errorsmod.Wrapf(types.ErrChannelNotFound, "port-id: %s, channel-id %s", req.PortId, req.ChannelId).Error(),
+			errorsmod.Wrapf(types.ErrSequenceSendNotFound, "port-id: %s, channel-id %s", req.PortId, req.ChannelId).Error(),
 		)
 	}
-
-	// Return the next sequence send for ordered channels. Unordered channels
-	// do not make use of the next sequence send.
-	var sequence uint64
-	if channel.Ordering != types.UNORDERED {
-		sequence, found = k.GetNextSequenceSend(ctx, req.PortId, req.ChannelId)
-		if !found {
-			return nil, status.Error(
-				codes.NotFound,
-				errorsmod.Wrapf(types.ErrSequenceSendNotFound, "port-id: %s, channel-id %s", req.PortId, req.ChannelId).Error(),
-			)
-		}
-	}
 	selfHeight := clienttypes.GetSelfHeight(ctx)
 	return types.NewQueryNextSequenceSendResponse(sequence, nil, selfHeight), nil
 }

modules/core/04-channel/keeper/grpc_query_test.go

@@ -1620,12 +1620,14 @@ func (suite *KeeperTestSuite) TestQueryNextSequenceSend() {
 			false,
 		},
 		{
-			"basic success on unordered channel returns zero",
+			"basic success on unordered channel returns the set send sequence",
 			func() {
 				path := ibctesting.NewPath(suite.chainA, suite.chainB)
 				suite.coordinator.Setup(path)
 
-				expSeq = 0
+				expSeq = 42
+				seq := uint64(42)
+				suite.chainA.App.GetIBCKeeper().ChannelKeeper.SetNextSequenceSend(suite.chainA.GetContext(), path.EndpointA.ChannelConfig.PortID, path.EndpointA.ChannelID, seq)
 				req = &types.QueryNextSequenceSendRequest{
 					PortId:    path.EndpointA.ChannelConfig.PortID,
 					ChannelId: path.EndpointA.ChannelID,