Register gRPC Gateway routes (#7173)

* added unimplemeted code

* added a test for bank get balances

* fixed lint

* Fix decode error

* fixed tests

* added missing gRPC tests for x/bank

* added tests for params, rewards in x/distribution

* added tests for x/distr grpc tests

* added todos

* removed register grpc routes

* registered x/ibc client handlers

* updated todos

* fixed error

* fixed tests

* review changes

* review change

Co-authored-by: anilCSE <anil@vitwit.com>
Co-authored-by: Alexander Bezobchuk <alexanderbez@users.noreply.github.com>

x/auth/module.go

@@ -1,6 +1,7 @@
 package auth
 
 import (
+	"context"
 	"encoding/json"
 	"fmt"
 	"math/rand"
@@ -66,7 +67,8 @@ func (AppModuleBasic) RegisterRESTRoutes(clientCtx client.Context, rtr *mux.Rout
 }
 
 // RegisterGRPCRoutes registers the gRPC Gateway routes for the auth module.
-func (a AppModuleBasic) RegisterGRPCRoutes(_ client.Context, _ *runtime.ServeMux) {
+func (AppModuleBasic) RegisterGRPCRoutes(clientCtx client.Context, mux *runtime.ServeMux) {
+	types.RegisterQueryHandlerClient(context.Background(), mux, types.NewQueryClient(clientCtx))
 }
 
 // GetTxCmd returns the root tx command for the auth module.

x/bank/client/rest/grpc_query_test.go

@@ -1,13 +1,16 @@
 package rest_test
 
 import (
+	"encoding/base64"
 	"fmt"
 
 	"github.com/gogo/protobuf/proto"
 
 	"github.com/cosmos/cosmos-sdk/testutil"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	grpctypes "github.com/cosmos/cosmos-sdk/types/grpc"
+	"github.com/cosmos/cosmos-sdk/types/query"
+	"github.com/cosmos/cosmos-sdk/types/rest"
 	"github.com/cosmos/cosmos-sdk/x/bank/types"
 )
 
@@ -93,3 +96,67 @@ func (s *IntegrationTestSuite) TestTotalSupplyGRPCHandler() {
 		})
 	}
 }
+
+func (s *IntegrationTestSuite) TestBalancesGRPCHandler() {
+	val := s.network.Validators[0]
+	baseURL := val.APIAddress
+
+	// TODO: need to pass bech32 string instead of base64 encoding string.
+	// ref: https://github.com/cosmos/cosmos-sdk/issues/7195
+	accAddrBase64 := base64.URLEncoding.EncodeToString(val.Address)
+
+	testCases := []struct {
+		name     string
+		url      string
+		respType proto.Message
+		expected proto.Message
+	}{
+		{
+			"gRPC total account balance",
+			fmt.Sprintf("%s/cosmos/bank/v1beta1/balances/%s", baseURL, accAddrBase64),
+			&types.QueryAllBalancesResponse{},
+			&types.QueryAllBalancesResponse{
+				Balances: sdk.NewCoins(
+					sdk.NewCoin(fmt.Sprintf("%stoken", val.Moniker), s.cfg.AccountTokens),
+					sdk.NewCoin(s.cfg.BondDenom, s.cfg.StakingTokens.Sub(s.cfg.BondedTokens)),
+				),
+				Pagination: &query.PageResponse{
+					Total: 2,
+				},
+			},
+		},
+		{
+			"gPRC account balance of a denom",
+			fmt.Sprintf("%s/cosmos/bank/v1beta1/balances/%s/%s", baseURL, accAddrBase64, s.cfg.BondDenom),
+			&types.QueryBalanceResponse{},
+			&types.QueryBalanceResponse{
+				Balance: &sdk.Coin{
+					Denom:  s.cfg.BondDenom,
+					Amount: s.cfg.StakingTokens.Sub(s.cfg.BondedTokens),
+				},
+			},
+		},
+		{
+			"gPRC account balance of a bogus denom",
+			fmt.Sprintf("%s/cosmos/bank/v1beta1/balances/%s/foobar", baseURL, accAddrBase64),
+			&types.QueryBalanceResponse{},
+			&types.QueryBalanceResponse{
+				Balance: &sdk.Coin{
+					Denom:  "foobar",
+					Amount: sdk.NewInt(0),
+				},
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		tc := tc
+		s.Run(tc.name, func() {
+			resp, err := rest.GetRequest(tc.url)
+			s.Require().NoError(err)
+
+			s.Require().NoError(val.ClientCtx.JSONMarshaler.UnmarshalJSON(resp, tc.respType))
+			s.Require().Equal(tc.expected.String(), tc.respType.String())
+		})
+	}
+}

x/bank/module.go

@@ -64,7 +64,7 @@ func (AppModuleBasic) RegisterRESTRoutes(clientCtx client.Context, rtr *mux.Rout
 }
 
 // RegisterGRPCRoutes registers the gRPC Gateway routes for the bank module.
-func (a AppModuleBasic) RegisterGRPCRoutes(clientCtx client.Context, mux *runtime.ServeMux) {
+func (AppModuleBasic) RegisterGRPCRoutes(clientCtx client.Context, mux *runtime.ServeMux) {
 	types.RegisterQueryHandlerClient(context.Background(), mux, types.NewQueryClient(clientCtx))
 }