Register x/mint gRPC gateway routes (#7214)

* Add grpc-gateway mint module test script

* Add grpc-gateway mint module test script

* Add grpc inflation test-case

* Fix `x/mint` grpc test-case

* review changes

Co-authored-by: aleem1314 <aleem.rgukt123@gmail.com>
Co-authored-by: atheeshp <59333759+atheeshp@users.noreply.github.com>
Co-authored-by: Alexander Bezobchuk <alexanderbez@users.noreply.github.com>

x/mint/client/rest/grpc_query_test.go

@@ -0,0 +1,110 @@
+package rest_test
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/cosmos/cosmos-sdk/testutil"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	grpctypes "github.com/cosmos/cosmos-sdk/types/grpc"
+
+	"github.com/gogo/protobuf/proto"
+	"github.com/stretchr/testify/suite"
+
+	"github.com/cosmos/cosmos-sdk/testutil/network"
+	minttypes "github.com/cosmos/cosmos-sdk/x/mint/types"
+)
+
+type IntegrationTestSuite struct {
+	suite.Suite
+	cfg     network.Config
+	network *network.Network
+}
+
+func (s *IntegrationTestSuite) SetupSuite() {
+	s.T().Log("setting up integration test suite")
+
+	cfg := network.DefaultConfig()
+
+	genesisState := cfg.GenesisState
+	cfg.NumValidators = 1
+
+	var mintData minttypes.GenesisState
+	s.Require().NoError(cfg.Codec.UnmarshalJSON(genesisState[minttypes.ModuleName], &mintData))
+
+	inflation := sdk.MustNewDecFromStr("1.0")
+	mintData.Minter.Inflation = inflation
+	mintData.Params.InflationMin = inflation
+	mintData.Params.InflationMax = inflation
+
+	mintDataBz, err := cfg.Codec.MarshalJSON(&mintData)
+	s.Require().NoError(err)
+	genesisState[minttypes.ModuleName] = mintDataBz
+	cfg.GenesisState = genesisState
+
+	s.cfg = cfg
+	s.network = network.New(s.T(), cfg)
+
+	_, err = s.network.WaitForHeight(1)
+	s.Require().NoError(err)
+}
+
+func (s *IntegrationTestSuite) TearDownSuite() {
+	s.T().Log("tearing down integration test suite")
+	s.network.Cleanup()
+}
+
+func (s *IntegrationTestSuite) TestQueryGRPC() {
+	val := s.network.Validators[0]
+	baseURL := val.APIAddress
+	testCases := []struct {
+		name     string
+		url      string
+		headers  map[string]string
+		respType proto.Message
+		expected proto.Message
+	}{
+		{
+			"gRPC request params",
+			fmt.Sprintf("%s/cosmos/mint/v1beta1/params", baseURL),
+			map[string]string{},
+			&minttypes.QueryParamsResponse{},
+			&minttypes.QueryParamsResponse{
+				Params: minttypes.NewParams("stake", sdk.NewDecWithPrec(13, 2), sdk.NewDecWithPrec(100, 2),
+					sdk.NewDec(1), sdk.NewDecWithPrec(67, 2), (60 * 60 * 8766 / 5)),
+			},
+		},
+		{
+			"gRPC request inflation",
+			fmt.Sprintf("%s/cosmos/mint/v1beta1/inflation", baseURL),
+			map[string]string{},
+			&minttypes.QueryInflationResponse{},
+			&minttypes.QueryInflationResponse{
+				Inflation: sdk.NewDec(1),
+			},
+		},
+		{
+			"gRPC request annual provisions",
+			fmt.Sprintf("%s/cosmos/mint/v1beta1/annual_provisions", baseURL),
+			map[string]string{
+				grpctypes.GRPCBlockHeightHeader: "1",
+			},
+			&minttypes.QueryAnnualProvisionsResponse{},
+			&minttypes.QueryAnnualProvisionsResponse{
+				AnnualProvisions: sdk.NewDec(500000000),
+			},
+		},
+	}
+	for _, tc := range testCases {
+		resp, err := testutil.GetRequestWithHeaders(tc.url, tc.headers)
+		s.Run(tc.name, func() {
+			s.Require().NoError(err)
+			s.Require().NoError(val.ClientCtx.JSONMarshaler.UnmarshalJSON(resp, tc.respType))
+			s.Require().Equal(tc.expected.String(), tc.respType.String())
+		})
+	}
+}
+
+func TestIntegrationTestSuite(t *testing.T) {
+	suite.Run(t, new(IntegrationTestSuite))
+}

x/mint/module.go

@@ -1,6 +1,7 @@
 package mint
 
 import (
+	"context"
 	"encoding/json"
 	"fmt"
 	"math/rand"
@@ -70,7 +71,9 @@ func (AppModuleBasic) RegisterRESTRoutes(clientCtx client.Context, rtr *mux.Rout
 }
 
 // RegisterGRPCRoutes registers the gRPC Gateway routes for the mint module.
-func (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 no root tx command for the mint module.