feat(cli/api): add validator distribution info grpc gateway get endpoint

proto/cosmos/distribution/v1beta1/query.proto

@@ -17,6 +17,12 @@ service Query {
     option (google.api.http).get = "/cosmos/distribution/v1beta1/params";
   }
 
+  // ValidatorDistributionInfo queries validator commision and self-delegation rewards for validator
+  rpc ValidatorDistributionInfo(QueryValidatorDistributionInfoRequest)
+      returns (QueryValidatorDistributionInfoResponse) {
+    option (google.api.http).get = "/cosmos/distribution/v1beta1/validators/{validator_address}";
+  }
+
   // ValidatorOutstandingRewards queries rewards of a validator address.
   rpc ValidatorOutstandingRewards(QueryValidatorOutstandingRewardsRequest)
       returns (QueryValidatorOutstandingRewardsResponse) {
@@ -74,6 +80,26 @@ message QueryParamsResponse {
   Params params = 1 [(gogoproto.nullable) = false];
 }
 
+// QueryValidatorDistributionInfoRequest is the request type for the Query/ValidatorDistributionInfo RPC method.
+message QueryValidatorDistributionInfoRequest {
+  // validator_address defines the validator address to query for.
+  string validator_address = 1 [(cosmos_proto.scalar) = "cosmos.AddressString"];
+}
+
+// QueryValidatorDistributionInfoResponse is the response type for the Query/ValidatorDistributionInfo RPC method.
+message QueryValidatorDistributionInfoResponse {
+  // operator_address defines the validator operator address.
+  string operator_address = 1 [(cosmos_proto.scalar) = "cosmos.AddressString"];
+  // self_bond_rewards defines the self delegations rewards.
+  repeated cosmos.base.v1beta1.DecCoin self_bond_rewards = 2
+      [(gogoproto.nullable) = false, (gogoproto.castrepeated) = "github.com/cosmos/cosmos-sdk/types.DecCoins"];
+  // commission defines the commision the validator received.
+  repeated cosmos.base.v1beta1.DecCoin commission = 3 [
+    (gogoproto.castrepeated) = "github.com/cosmos/cosmos-sdk/types.DecCoins",
+    (gogoproto.nullable)     = false
+  ];
+}
+
 // QueryValidatorOutstandingRewardsRequest is the request type for the
 // Query/ValidatorOutstandingRewards RPC method.
 message QueryValidatorOutstandingRewardsRequest {

x/distribution/client/cli/query.go

@@ -26,6 +26,7 @@ func GetQueryCmd() *cobra.Command {
 
 	distQueryCmd.AddCommand(
 		GetCmdQueryParams(),
+		GetCmdQueryValidatorDistributionInfo(),
 		GetCmdQueryValidatorOutstandingRewards(),
 		GetCmdQueryValidatorCommission(),
 		GetCmdQueryValidatorSlashes(),
@@ -62,6 +63,50 @@ func GetCmdQueryParams() *cobra.Command {
 	return cmd
 }
 
+// GetCmdQueryValidatorDistributionInfo implements the query validator distribution info command.
+func GetCmdQueryValidatorDistributionInfo() *cobra.Command {
+	bech32PrefixValAddr := sdk.GetConfig().GetBech32ValidatorAddrPrefix()
+
+	cmd := &cobra.Command{
+		Use:   "validator-distribution-info [validator]",
+		Args:  cobra.ExactArgs(1),
+		Short: "Query validator distribution info",
+		Long: strings.TrimSpace(
+			fmt.Sprintf(`Query validator distribution info.
+Example:
+$ %s query distribution validator-distribution-info %s1lwjmdnks33xwnmfayc64ycprww49n33mtm92ne
+`,
+				version.AppName, bech32PrefixValAddr,
+			),
+		),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			clientCtx, err := client.GetClientQueryContext(cmd)
+			if err != nil {
+				return err
+			}
+
+			validatorAddr, err := sdk.ValAddressFromBech32(args[0])
+			if err != nil {
+				return err
+			}
+
+			queryClient := types.NewQueryClient(clientCtx)
+
+			res, err := queryClient.ValidatorDistributionInfo(cmd.Context(), &types.QueryValidatorDistributionInfoRequest{
+				ValidatorAddress: validatorAddr.String(),
+			})
+			if err != nil {
+				return err
+			}
+
+			return clientCtx.PrintProto(res)
+		},
+	}
+
+	flags.AddQueryFlagsToCmd(cmd)
+	return cmd
+}
+
 // GetCmdQueryValidatorOutstandingRewards implements the query validator
 // outstanding rewards command.
 func GetCmdQueryValidatorOutstandingRewards() *cobra.Command {

x/distribution/client/testutil/grpc_query_suite.go

@@ -75,6 +75,44 @@ func (s *GRPCQueryTestSuite) TestQueryParamsGRPC() {
 	}
 }
 
+func (s *GRPCQueryTestSuite) TestQueryValidatorDistributionInfoGRPC() {
+	val := s.network.Validators[0]
+	baseURL := val.APIAddress
+
+	testCases := []struct {
+		name     string
+		url      string
+		expErr   bool
+		respType proto.Message
+	}{
+		{
+			"gRPC request with wrong validator address",
+			fmt.Sprintf("%s/cosmos/distribution/v1beta1/validators/%s", baseURL, "wrongAddress"),
+			true,
+			&types.QueryValidatorDistributionInfoResponse{},
+		},
+		{
+			"gRPC request with valid validator address ",
+			fmt.Sprintf("%s/cosmos/distribution/v1beta1/validators/%s", baseURL, val.ValAddress.String()),
+			false,
+			&types.QueryValidatorDistributionInfoResponse{},
+		},
+	}
+
+	for _, tc := range testCases {
+		tc := tc
+		resp, err := rest.GetRequest(tc.url)
+		s.Run(tc.name, func() {
+			if tc.expErr {
+				s.Require().Error(val.ClientCtx.Codec.UnmarshalJSON(resp, tc.respType))
+			} else {
+				s.Require().NoError(err)
+				s.Require().NoError(val.ClientCtx.Codec.UnmarshalJSON(resp, tc.respType))
+			}
+		})
+	}
+}
+
 func (s *GRPCQueryTestSuite) TestQueryOutstandingRewardsGRPC() {
 	val := s.network.Validators[0]
 	baseURL := val.APIAddress

x/distribution/client/testutil/suite.go

@@ -108,6 +108,48 @@ withdraw_addr_enabled: true`,
 	}
 }
 
+func (s *IntegrationTestSuite) TestGetCmdQueryValidatorDistributionInfo() {
+	val := s.network.Validators[0]
+
+	testCases := []struct {
+		name   string
+		args   []string
+		expErr bool
+	}{
+		{
+			"invalid val address",
+			[]string{"invalid address", fmt.Sprintf("--%s=json", tmcli.OutputFlag)},
+			true,
+		},
+		{
+			"json output",
+			[]string{val.ValAddress.String(), fmt.Sprintf("--%s=json", tmcli.OutputFlag)},
+			false,
+		},
+		{
+			"text output",
+			[]string{val.ValAddress.String(), fmt.Sprintf("--%s=text", tmcli.OutputFlag)},
+			false,
+		},
+	}
+
+	for _, tc := range testCases {
+		tc := tc
+
+		s.Run(tc.name, func() {
+			cmd := cli.GetCmdQueryValidatorDistributionInfo()
+			clientCtx := val.ClientCtx
+
+			_, err := clitestutil.ExecTestCLICmd(clientCtx, cmd, tc.args)
+			if tc.expErr {
+				s.Require().Error(err)
+			} else {
+				s.Require().NoError(err)
+			}
+		})
+	}
+}
+
 func (s *IntegrationTestSuite) TestGetCmdQueryValidatorOutstandingRewards() {
 	val := s.network.Validators[0]
 

x/distribution/keeper/grpc_query.go

@@ -2,6 +2,7 @@ package keeper
 
 import (
 	"context"
+	"encoding/hex"
 
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
@@ -32,6 +33,52 @@ func (k Querier) Params(c context.Context, req *types.QueryParamsRequest) (*type
 	return &types.QueryParamsResponse{Params: params}, nil
 }
 
+// ValidatorDistributionInfo query validator's commission and self-delegation rewards
+func (k Querier) ValidatorDistributionInfo(c context.Context, req *types.QueryValidatorDistributionInfoRequest) (*types.QueryValidatorDistributionInfoResponse, error) {
+	if req == nil {
+		return nil, status.Error(codes.InvalidArgument, "invalid request")
+	}
+
+	if req.ValidatorAddress == "" {
+		return nil, status.Error(codes.InvalidArgument, "empty validator address")
+	}
+
+	ctx := sdk.UnwrapSDKContext(c)
+
+	valAdr, err := sdk.ValAddressFromBech32(req.ValidatorAddress)
+	if err != nil {
+		return nil, err
+	}
+
+	// self-delegation rewards
+	val := k.stakingKeeper.Validator(ctx, valAdr)
+	if val == nil {
+		return nil, sdkerrors.Wrap(types.ErrNoValidatorExists, req.ValidatorAddress)
+	}
+
+	delAdr, err := sdk.AccAddressFromHexUnsafe(hex.EncodeToString(valAdr.Bytes()))
+	if err != nil {
+		return nil, err
+	}
+
+	del := k.stakingKeeper.Delegation(ctx, delAdr, valAdr)
+	if del == nil {
+		return nil, types.ErrNoDelegationExists
+	}
+
+	endingPeriod := k.IncrementValidatorPeriod(ctx, val)
+	rewards := k.CalculateDelegationRewards(ctx, val, del, endingPeriod)
+
+	// validator's commission
+	validatorCommission := k.GetValidatorAccumulatedCommission(ctx, valAdr)
+
+	return &types.QueryValidatorDistributionInfoResponse{
+		Commission:      validatorCommission.Commission,
+		OperatorAddress: delAdr.String(),
+		SelfBondRewards: rewards,
+	}, nil
+}
+
 // ValidatorOutstandingRewards queries rewards of a validator address
 func (k Querier) ValidatorOutstandingRewards(c context.Context, req *types.QueryValidatorOutstandingRewardsRequest) (*types.QueryValidatorOutstandingRewardsResponse, error) {
 	if req == nil {