fix: query account balance by ibc denom (cosmos#10394)

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## Description

Closes: cosmos#10381 

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---

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules)
- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [ ] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

### Reviewers Checklist

*All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.*

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed 
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

CHANGELOG.md

@@ -154,6 +154,8 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (x/upgrade) [\#10189](https://github.com/cosmos/cosmos-sdk/issues/10189) Removed potential sources of non-determinism in upgrades
 * [\#10258](https://github.com/cosmos/cosmos-sdk/issues/10258) Fixes issue related to segmentaiton fault on mac m1 arm64
 * [\#10466](https://github.com/cosmos/cosmos-sdk/issues/10466) Fixes error with simulation tests when genesis start time is randomly created after the year 2262
+* [\#10394](https://github.com/cosmos/cosmos-sdk/issues/10394) Fixes issue related to grpc-gateway of account balance by
+  ibc-denom.
 
 
 ### State Machine Breaking

docs/core/proto-docs.md

@@ -2291,7 +2291,7 @@ Query defines the gRPC querier service.
 
 | Method Name | Request Type | Response Type | Description | HTTP Verb | Endpoint |
 | ----------- | ------------ | ------------- | ------------| ------- | -------- |
-| `Balance` | [QueryBalanceRequest](#cosmos.bank.v1beta1.QueryBalanceRequest) | [QueryBalanceResponse](#cosmos.bank.v1beta1.QueryBalanceResponse) | Balance queries the balance of a single coin for a single account. | GET|/cosmos/bank/v1beta1/balances/{address}/{denom}|
+| `Balance` | [QueryBalanceRequest](#cosmos.bank.v1beta1.QueryBalanceRequest) | [QueryBalanceResponse](#cosmos.bank.v1beta1.QueryBalanceResponse) | Balance queries the balance of a single coin for a single account. | GET|/cosmos/bank/v1beta1/balances/{address}/by_denom|
 | `AllBalances` | [QueryAllBalancesRequest](#cosmos.bank.v1beta1.QueryAllBalancesRequest) | [QueryAllBalancesResponse](#cosmos.bank.v1beta1.QueryAllBalancesResponse) | AllBalances queries the balance of all coins for a single account. | GET|/cosmos/bank/v1beta1/balances/{address}|
 | `TotalSupply` | [QueryTotalSupplyRequest](#cosmos.bank.v1beta1.QueryTotalSupplyRequest) | [QueryTotalSupplyResponse](#cosmos.bank.v1beta1.QueryTotalSupplyResponse) | TotalSupply queries the total supply of all coins. | GET|/cosmos/bank/v1beta1/supply|
 | `SupplyOf` | [QuerySupplyOfRequest](#cosmos.bank.v1beta1.QuerySupplyOfRequest) | [QuerySupplyOfResponse](#cosmos.bank.v1beta1.QuerySupplyOfResponse) | SupplyOf queries the supply of a single coin. | GET|/cosmos/bank/v1beta1/supply/{denom}|

proto/cosmos/bank/v1beta1/query.proto

@@ -14,7 +14,7 @@ option go_package = "github.com/cosmos/cosmos-sdk/x/bank/types";
 service Query {
   // Balance queries the balance of a single coin for a single account.
   rpc Balance(QueryBalanceRequest) returns (QueryBalanceResponse) {
-    option (google.api.http).get = "/cosmos/bank/v1beta1/balances/{address}/{denom}";
+    option (google.api.http).get = "/cosmos/bank/v1beta1/balances/{address}/by_denom";
   }
 
   // AllBalances queries the balance of all coins for a single account.
@@ -57,7 +57,7 @@ service Query {
 
 // QueryBalanceRequest is the request type for the Query/Balance RPC method.
 message QueryBalanceRequest {
-  option (gogoproto.equal)           = false;
+  option (gogoproto.equal) = false;
   option (gogoproto.goproto_getters) = false;
 
   // address is the address to query balances for.
@@ -75,7 +75,7 @@ message QueryBalanceResponse {
 
 // QueryBalanceRequest is the request type for the Query/AllBalances RPC method.
 message QueryAllBalancesRequest {
-  option (gogoproto.equal)           = false;
+  option (gogoproto.equal) = false;
   option (gogoproto.goproto_getters) = false;
 
   // address is the address to query balances for.
@@ -90,7 +90,7 @@ message QueryAllBalancesRequest {
 message QueryAllBalancesResponse {
   // balances is the balances of all the coins.
   repeated cosmos.base.v1beta1.Coin balances = 1
-      [(gogoproto.nullable) = false, (gogoproto.castrepeated) = "github.com/cosmos/cosmos-sdk/types.Coins"];
+  [(gogoproto.nullable) = false, (gogoproto.castrepeated) = "github.com/cosmos/cosmos-sdk/types.Coins"];
 
   // pagination defines the pagination in the response.
   cosmos.base.query.v1beta1.PageResponse pagination = 2;
@@ -99,7 +99,7 @@ message QueryAllBalancesResponse {
 // QueryTotalSupplyRequest is the request type for the Query/TotalSupply RPC
 // method.
 message QueryTotalSupplyRequest {
-  option (gogoproto.equal)           = false;
+  option (gogoproto.equal) = false;
   option (gogoproto.goproto_getters) = false;
 
   // pagination defines an optional pagination for the request.
@@ -113,7 +113,7 @@ message QueryTotalSupplyRequest {
 message QueryTotalSupplyResponse {
   // supply is the supply of the coins
   repeated cosmos.base.v1beta1.Coin supply = 1
-      [(gogoproto.nullable) = false, (gogoproto.castrepeated) = "github.com/cosmos/cosmos-sdk/types.Coins"];
+  [(gogoproto.nullable) = false, (gogoproto.castrepeated) = "github.com/cosmos/cosmos-sdk/types.Coins"];
 
   // pagination defines the pagination in the response.
   //

x/bank/client/testutil/grpc.go

@@ -250,7 +250,7 @@ func (s *IntegrationTestSuite) TestBalancesGRPCHandler() {
 		},
 		{
 			"gPRC account balance of a denom",
-			fmt.Sprintf("%s/cosmos/bank/v1beta1/balances/%s/%s", baseURL, val.Address.String(), s.cfg.BondDenom),
+			fmt.Sprintf("%s/cosmos/bank/v1beta1/balances/%s/by_denom?denom=%s", baseURL, val.Address.String(), s.cfg.BondDenom),
 			&types.QueryBalanceResponse{},
 			&types.QueryBalanceResponse{
 				Balance: &sdk.Coin{
@@ -261,7 +261,7 @@ func (s *IntegrationTestSuite) TestBalancesGRPCHandler() {
 		},
 		{
 			"gPRC account balance of a bogus denom",
-			fmt.Sprintf("%s/cosmos/bank/v1beta1/balances/%s/foobar", baseURL, val.Address.String()),
+			fmt.Sprintf("%s/cosmos/bank/v1beta1/balances/%s/by_denom?denom=foobar", baseURL, val.Address.String()),
 			&types.QueryBalanceResponse{},
 			&types.QueryBalanceResponse{
 				Balance: &sdk.Coin{