feat: adding interchain account address query to controller submodule

CHANGELOG.md

@@ -98,6 +98,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 ### Features
 
 * (apps/27-interchain-accounts) [\#2147](https://github.com/cosmos/ibc-go/pull/2147) Adding a `SubmitTx` gRPC endpoint for the ICS27 Controller module which allows owners of interchain accounts to submit transactions. This replaces the previously existing need for authentication modules to implement this standard functionality.
+* (apps/27-interchain-accounts) [\#2193](https://github.com/cosmos/ibc-go/pull/2193) Adding `InterchainAccount` gRPC query endpont to ICS27 `controller` submodule to allow users to retrieve registered interchain account addresses.
 
 ### Bug Fixes
 

docs/client/swagger-ui/swagger.yaml

@@ -365,6 +365,56 @@ paths:
                       format: byte
       tags:
         - Query
+  '/ibc/apps/interchain_accounts/controller/v1/owners/{owner}/connections/{connection_id}':
+    get:
+      summary: >-
+        InterchainAccount returns the interchain account address for a given
+        owner address on a given connection
+      operationId: InterchainAccount
+      responses:
+        '200':
+          description: A successful response.
+          schema:
+            type: object
+            properties:
+              address:
+                type: string
+            description: >-
+              QueryInterchainAccountResponse the response type for the
+              Query/InterchainAccount RPC method.
+        default:
+          description: An unexpected error response
+          schema:
+            type: object
+            properties:
+              error:
+                type: string
+              code:
+                type: integer
+                format: int32
+              message:
+                type: string
+              details:
+                type: array
+                items:
+                  type: object
+                  properties:
+                    type_url:
+                      type: string
+                    value:
+                      type: string
+                      format: byte
+      parameters:
+        - name: owner
+          in: path
+          required: true
+          type: string
+        - name: connection_id
+          in: path
+          required: true
+          type: string
+      tags:
+        - Query
   /ibc/apps/interchain_accounts/controller/v1/params:
     get:
       summary: Params queries all parameters of the ICA controller submodule.
@@ -13384,6 +13434,14 @@ definitions:
     description: |-
       Params defines the set of on-chain interchain accounts parameters.
       The following parameters may be used to disable the controller submodule.
+  ibc.applications.interchain_accounts.controller.v1.QueryInterchainAccountResponse:
+    type: object
+    properties:
+      address:
+        type: string
+    description: >-
+      QueryInterchainAccountResponse the response type for the
+      Query/InterchainAccount RPC method.
   ibc.applications.interchain_accounts.controller.v1.QueryParamsResponse:
     type: object
     properties:

docs/ibc/proto-docs.md

@@ -84,6 +84,8 @@
     - [Params](#ibc.applications.interchain_accounts.controller.v1.Params)
 
 - [ibc/applications/interchain_accounts/controller/v1/query.proto](#ibc/applications/interchain_accounts/controller/v1/query.proto)
+    - [QueryInterchainAccountRequest](#ibc.applications.interchain_accounts.controller.v1.QueryInterchainAccountRequest)
+    - [QueryInterchainAccountResponse](#ibc.applications.interchain_accounts.controller.v1.QueryInterchainAccountResponse)
     - [QueryParamsRequest](#ibc.applications.interchain_accounts.controller.v1.QueryParamsRequest)
     - [QueryParamsResponse](#ibc.applications.interchain_accounts.controller.v1.QueryParamsResponse)
 
@@ -1475,6 +1477,37 @@ The following parameters may be used to disable the controller submodule.
 
 
 
+<a name="ibc.applications.interchain_accounts.controller.v1.QueryInterchainAccountRequest"></a>
+
+### QueryInterchainAccountRequest
+QueryInterchainAccountRequest is the request type for the Query/InterchainAccount RPC method.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| `owner` | [string](#string) |  |  |
+| `connection_id` | [string](#string) |  |  |
+
+
+
+
+
+
+<a name="ibc.applications.interchain_accounts.controller.v1.QueryInterchainAccountResponse"></a>
+
+### QueryInterchainAccountResponse
+QueryInterchainAccountResponse the response type for the Query/InterchainAccount RPC method.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| `address` | [string](#string) |  |  |
+
+
+
+
+
+
 <a name="ibc.applications.interchain_accounts.controller.v1.QueryParamsRequest"></a>
 
 ### QueryParamsRequest
@@ -1513,6 +1546,7 @@ Query provides defines the gRPC querier service.
 
 | Method Name | Request Type | Response Type | Description | HTTP Verb | Endpoint |
 | ----------- | ------------ | ------------- | ------------| ------- | -------- |
+| `InterchainAccount` | [QueryInterchainAccountRequest](#ibc.applications.interchain_accounts.controller.v1.QueryInterchainAccountRequest) | [QueryInterchainAccountResponse](#ibc.applications.interchain_accounts.controller.v1.QueryInterchainAccountResponse) | InterchainAccount returns the interchain account address for a given owner address on a given connection | GET|/ibc/apps/interchain_accounts/controller/v1/owners/{owner}/connections/{connection_id}|
 | `Params` | [QueryParamsRequest](#ibc.applications.interchain_accounts.controller.v1.QueryParamsRequest) | [QueryParamsResponse](#ibc.applications.interchain_accounts.controller.v1.QueryParamsResponse) | Params queries all parameters of the ICA controller submodule. | GET|/ibc/apps/interchain_accounts/controller/v1/params|
 
  <!-- end services -->

modules/apps/27-interchain-accounts/controller/client/cli/cli.go

@@ -14,6 +14,7 @@ func GetQueryCmd() *cobra.Command {
 	}
 
 	queryCmd.AddCommand(
+		GetCmdQueryInterchainAccount(),
 		GetCmdParams(),
 	)
 

modules/apps/27-interchain-accounts/controller/client/cli/query.go

@@ -11,6 +11,40 @@ import (
 	"github.com/cosmos/ibc-go/v5/modules/apps/27-interchain-accounts/controller/types"
 )
 
+// GetCmdQueryInterchainAccount returns the command handler for the controller submodule parameter querying.
+func GetCmdQueryInterchainAccount() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:     "interchain-account [owner] [connection-id]",
+		Short:   "Query the interchain account address for a given owner on a particular connection",
+		Long:    "Query the controller submodule for the interchain account address for a given owner on a particular connection",
+		Args:    cobra.ExactArgs(2),
+		Example: fmt.Sprintf("%s query interchain-accounts controller interchain-account connection-0 cosmos1layxcsmyye0dc0har9sdfzwckaz8sjwlfsj8zs", version.AppName),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			clientCtx, err := client.GetClientQueryContext(cmd)
+			if err != nil {
+				return err
+			}
+
+			queryClient := types.NewQueryClient(clientCtx)
+			req := &types.QueryInterchainAccountRequest{
+				Owner:        args[0],
+				ConnectionId: args[1],
+			}
+
+			res, err := queryClient.InterchainAccount(cmd.Context(), req)
+			if err != nil {
+				return err
+			}
+
+			return clientCtx.PrintProto(res)
+		},
+	}
+
+	flags.AddQueryFlagsToCmd(cmd)
+
+	return cmd
+}
+
 // GetCmdParams returns the command handler for the controller submodule parameter querying.
 func GetCmdParams() *cobra.Command {
 	cmd := &cobra.Command{

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

@@ -4,16 +4,41 @@ import (
 	"context"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
 
 	"github.com/cosmos/ibc-go/v5/modules/apps/27-interchain-accounts/controller/types"
+	icatypes "github.com/cosmos/ibc-go/v5/modules/apps/27-interchain-accounts/types"
 )
 
 var _ types.QueryServer = Keeper{}
 
+// InterchainAccount implements the Query/InterchainAccount gRPC method
+func (k Keeper) InterchainAccount(goCtx context.Context, req *types.QueryInterchainAccountRequest) (*types.QueryInterchainAccountResponse, error) {
+	if req == nil {
+		return nil, status.Error(codes.InvalidArgument, "empty request")
+	}
+
+	portID, err := icatypes.NewControllerPortID(req.Owner)
+	if err != nil {
+		return nil, status.Errorf(codes.InvalidArgument, "failed to generate portID from owner address: %s", err)
+	}
+
+	ctx := sdk.UnwrapSDKContext(goCtx)
+	addr, found := k.GetInterchainAccountAddress(ctx, req.ConnectionId, portID)
+	if !found {
+		return nil, status.Errorf(codes.NotFound, "failed to retrieve account address for %s on connection %s", portID, req.ConnectionId)
+	}
+
+	return &types.QueryInterchainAccountResponse{
+		Address: addr,
+	}, nil
+}
+
 // Params implements the Query/Params gRPC method
-func (q Keeper) Params(c context.Context, _ *types.QueryParamsRequest) (*types.QueryParamsResponse, error) {
+func (k Keeper) Params(c context.Context, _ *types.QueryParamsRequest) (*types.QueryParamsResponse, error) {
 	ctx := sdk.UnwrapSDKContext(c)
-	params := q.GetParams(ctx)
+	params := k.GetParams(ctx)
 
 	return &types.QueryParamsResponse{
 		Params: &params,

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

@@ -4,8 +4,77 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 
 	"github.com/cosmos/ibc-go/v5/modules/apps/27-interchain-accounts/controller/types"
+	icatypes "github.com/cosmos/ibc-go/v5/modules/apps/27-interchain-accounts/types"
+	ibctesting "github.com/cosmos/ibc-go/v5/testing"
 )
 
+func (suite *KeeperTestSuite) TestQueryInterchainAccount() {
+	var req *types.QueryInterchainAccountRequest
+
+	testCases := []struct {
+		name     string
+		malleate func()
+		expPass  bool
+	}{
+		{
+			"success",
+			func() {},
+			true,
+		},
+		{
+			"empty request",
+			func() {
+				req = nil
+			},
+			false,
+		},
+		{
+			"empty owner address",
+			func() {
+				req.Owner = ""
+			},
+			false,
+		},
+		{
+			"invalid connection, account address not found",
+			func() {
+				req.ConnectionId = "invalid-connection-id"
+			},
+			false,
+		},
+	}
+
+	for _, tc := range testCases {
+		suite.Run(tc.name, func() {
+			suite.SetupTest()
+
+			path := NewICAPath(suite.chainA, suite.chainB)
+			suite.coordinator.SetupConnections(path)
+
+			err := SetupICAPath(path, ibctesting.TestAccAddress)
+			suite.Require().NoError(err)
+
+			req = &types.QueryInterchainAccountRequest{
+				ConnectionId: ibctesting.FirstConnectionID,
+				Owner:        ibctesting.TestAccAddress,
+			}
+
+			tc.malleate()
+
+			res, err := suite.chainA.GetSimApp().ICAControllerKeeper.InterchainAccount(sdk.WrapSDKContext(suite.chainA.GetContext()), req)
+
+			if tc.expPass {
+				expAddress := icatypes.GenerateAddress(suite.chainA.GetSimApp().AccountKeeper.GetModuleAddress(icatypes.ModuleName), path.EndpointB.ConnectionID, path.EndpointA.ChannelConfig.PortID)
+
+				suite.Require().NoError(err)
+				suite.Require().Equal(expAddress.String(), res.Address)
+			} else {
+				suite.Require().Error(err)
+			}
+		})
+	}
+}
+
 func (suite *KeeperTestSuite) TestQueryParams() {
 	ctx := sdk.WrapSDKContext(suite.chainA.GetContext())
 	expParams := types.DefaultParams()