refactor: reformat KeyOwnerAccount (cosmos#833)

## Description

Reformats KeyOwnerAccount store key 

closes: [Damians Comment](cosmos#823 (review)) 

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

- [ ] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/ibc-go/blob/master/CONTRIBUTING.md#pr-targeting))
- [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [ ] Wrote unit and integration [tests](https://github.com/cosmos/ibc-go/blob/master/CONTRIBUTING.md#testing)
- [ ] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [ ] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [ ] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [ ] Re-reviewed `Files changed` in the Github PR explorer
- [ ] Review `Codecov Report` in the comment section below once CI passes

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

@@ -167,7 +167,7 @@ func (k Keeper) IsActiveChannel(ctx sdk.Context, connectionID, portID string) bo
 // GetInterchainAccountAddress retrieves the InterchainAccount address from the store associated with the provided connectionID and portID
 func (k Keeper) GetInterchainAccountAddress(ctx sdk.Context, connectionID, portID string) (string, bool) {
 	store := ctx.KVStore(k.storeKey)
-	key := icatypes.KeyOwnerAccount(connectionID, portID)
+	key := icatypes.KeyOwnerAccount(portID, connectionID)
 
 	if !store.Has(key) {
 		return "", false
@@ -186,8 +186,8 @@ func (k Keeper) GetAllInterchainAccounts(ctx sdk.Context) []icatypes.RegisteredI
 		keySplit := strings.Split(string(iterator.Key()), "/")
 
 		acc := icatypes.RegisteredInterchainAccount{
-			ConnectionId:   keySplit[1],
-			PortId:         keySplit[2],
+			ConnectionId:   keySplit[2],
+			PortId:         keySplit[1],
 			AccountAddress: string(iterator.Value()),
 		}
 
@@ -200,5 +200,5 @@ func (k Keeper) GetAllInterchainAccounts(ctx sdk.Context) []icatypes.RegisteredI
 // SetInterchainAccountAddress stores the InterchainAccount address, keyed by the associated connectionID and portID
 func (k Keeper) SetInterchainAccountAddress(ctx sdk.Context, connectionID, portID, address string) {
 	store := ctx.KVStore(k.storeKey)
-	store.Set(icatypes.KeyOwnerAccount(connectionID, portID), []byte(address))
+	store.Set(icatypes.KeyOwnerAccount(portID, connectionID), []byte(address))
 }

modules/apps/27-interchain-accounts/host/keeper/keeper.go

@@ -156,7 +156,7 @@ func (k Keeper) IsActiveChannel(ctx sdk.Context, connectionID, portID string) bo
 // GetInterchainAccountAddress retrieves the InterchainAccount address from the store associated with the provided connectionID and portID
 func (k Keeper) GetInterchainAccountAddress(ctx sdk.Context, connectionID, portID string) (string, bool) {
 	store := ctx.KVStore(k.storeKey)
-	key := icatypes.KeyOwnerAccount(connectionID, portID)
+	key := icatypes.KeyOwnerAccount(portID, connectionID)
 
 	if !store.Has(key) {
 		return "", false
@@ -175,8 +175,8 @@ func (k Keeper) GetAllInterchainAccounts(ctx sdk.Context) []icatypes.RegisteredI
 		keySplit := strings.Split(string(iterator.Key()), "/")
 
 		acc := icatypes.RegisteredInterchainAccount{
-			ConnectionId:   keySplit[1],
-			PortId:         keySplit[2],
+			ConnectionId:   keySplit[2],
+			PortId:         keySplit[1],
 			AccountAddress: string(iterator.Value()),
 		}
 
@@ -189,5 +189,5 @@ func (k Keeper) GetAllInterchainAccounts(ctx sdk.Context) []icatypes.RegisteredI
 // SetInterchainAccountAddress stores the InterchainAccount address, keyed by the associated connectionID and portID
 func (k Keeper) SetInterchainAccountAddress(ctx sdk.Context, connectionID, portID, address string) {
 	store := ctx.KVStore(k.storeKey)
-	store.Set(icatypes.KeyOwnerAccount(connectionID, portID), []byte(address))
+	store.Set(icatypes.KeyOwnerAccount(portID, connectionID), []byte(address))
 }

modules/apps/27-interchain-accounts/types/keys.go

@@ -44,8 +44,8 @@ func KeyActiveChannel(portID, connectionID string) []byte {
 }
 
 // KeyOwnerAccount creates and returns a new key used for interchain account store operations
-func KeyOwnerAccount(connectionID, portID string) []byte {
-	return []byte(fmt.Sprintf("%s/%s/%s", OwnerKeyPrefix, connectionID, portID))
+func KeyOwnerAccount(portID, connectionID string) []byte {
+	return []byte(fmt.Sprintf("%s/%s/%s", OwnerKeyPrefix, portID, connectionID))
 }
 
 // KeyPort creates and returns a new key used for port store operations

modules/apps/27-interchain-accounts/types/keys_test.go

@@ -10,6 +10,6 @@ func (suite *TypesTestSuite) TestKeyActiveChannel() {
 }
 
 func (suite *TypesTestSuite) TestKeyOwnerAccount() {
-	key := types.KeyOwnerAccount("connection-id", "port-id")
-	suite.Require().Equal("owner/connection-id/port-id", string(key))
+	key := types.KeyOwnerAccount("port-id", "connection-id")
+	suite.Require().Equal("owner/port-id/connection-id", string(key))
 }