chore: provide specific error messages on x/collection queries (#965)

* Provide better error message

* Update CHANGELOG.md

Author: 0Tech

CHANGELOG.md

@@ -46,6 +46,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (x/collection) [\#938](https://github.com/line/lbm-sdk/pull/938) Add progress log into x/collection import-genesis
 * (x/foundation) [\#952](https://github.com/line/lbm-sdk/pull/952) Address generation of the empty coins in x/foundation
 * (x/collection,token,foundation) [\#963](https://github.com/line/lbm-sdk/pull/963) Check event determinism on original modules
+* (x/collection) [\#965](https://github.com/line/lbm-sdk/pull/965) Provide specific error messages on x/collection queries
 
 ### Bug Fixes
 * (swagger) [\#898](https://github.com/line/lbm-sdk/pull/898) fix a bug not added `lbm.tx.v1beta1.Service/GetBlockWithTxs` in swagger

x/collection/keeper/grpc_query.go

@@ -379,6 +379,11 @@ func (s queryServer) TokenType(c context.Context, req *collection.QueryTokenType
 	}
 
 	ctx := sdk.UnwrapSDKContext(c)
+
+	if err := s.validateExistenceOfCollectionGRPC(ctx, req.ContractId); err != nil {
+		return nil, err
+	}
+
 	class, err := s.keeper.GetTokenClass(ctx, req.ContractId, classID)
 	if err != nil {
 		return nil, status.Error(codes.NotFound, err.Error())
@@ -454,6 +459,11 @@ func (s queryServer) Token(c context.Context, req *collection.QueryTokenRequest)
 	}
 
 	ctx := sdk.UnwrapSDKContext(c)
+
+	if err := s.validateExistenceOfCollectionGRPC(ctx, req.ContractId); err != nil {
+		return nil, err
+	}
+
 	legacyToken, err := s.getToken(ctx, req.ContractId, req.TokenId)
 	if err != nil {
 		return nil, status.Error(codes.NotFound, err.Error())

x/collection/keeper/grpc_query_test.go

@@ -681,6 +681,10 @@ func (s *KeeperTestSuite) TestQueryToken() {
 		"invalid token id": {
 			contractID: s.contractID,
 		},
+		"collection not found": {
+			contractID: "deadbeef",
+			tokenID:    ftTokenID,
+		},
 		"no such a fungible token": {
 			contractID: s.contractID,
 			tokenID:    collection.NewFTID("00bab10c"),