add grpc query for controller and host params (#574)

Adds gRPC routes for controller params and host params. Add tests and registers the gRPC gateways on the ica module

modules/apps/27-interchain-accounts/controller/keeper/grpc_query.go

@@ -0,0 +1,19 @@
+package keeper
+
+import (
+	"context"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cosmos/ibc-go/v2/modules/apps/27-interchain-accounts/controller/types"
+)
+
+var _ types.QueryServer = Keeper{}
+
+// Params implements the Query/Params gRPC method
+func (q Keeper) Params(c context.Context, _ *types.QueryParamsRequest) (*types.QueryParamsResponse, error) {
+	ctx := sdk.UnwrapSDKContext(c)
+	params := q.GetParams(ctx)
+
+	return &types.QueryParamsResponse{
+		Params: &params,
+	}, nil
+}

modules/apps/27-interchain-accounts/controller/keeper/grpc_query_test.go

@@ -0,0 +1,14 @@
+package keeper_test
+
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+
+	"github.com/cosmos/ibc-go/v2/modules/apps/27-interchain-accounts/controller/types"
+)
+
+func (suite *KeeperTestSuite) TestQueryParams() {
+	ctx := sdk.WrapSDKContext(suite.chainA.GetContext())
+	expParams := types.DefaultParams()
+	res, _ := suite.chainA.GetSimApp().ICAControllerKeeper.Params(ctx, &types.QueryParamsRequest{})
+	suite.Require().Equal(&expParams, res.Params)
+}