Add scoped keeper interface for interchain app (#2035)

## Description

Add scoped keeper interface for interchain app

Part of: #2020

---

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

CHANGELOG.md

@@ -59,6 +59,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (modules/core/exported) [\#1107](https://github.com/cosmos/ibc-go/pull/1107) Merging the `Header` and `Misbehaviour` interfaces into a single `ClientMessage` type.
 * (06-solomachine)[\#1906](https://github.com/cosmos/ibc-go/pull/1906/files) Removed `AllowUpdateAfterProposal` boolean as it has been deprecated (see 01_concepts of the solo machine spec for more details).
 * (07-tendermint) [\#1896](https://github.com/cosmos/ibc-go/pull/1896) Remove error return from `IterateConsensusStateAscending` in `07-tendermint`.
+* (apps/27-interchain-accounts) [\#2035](https://github.com/cosmos/ibc-go/pull/2035) Interchain accounts host and controller Keepers now expects a keeper which fulfills the expected `ScopedKeeper` interface for the capability keeper.
 * (transfer) [\#2034](https://github.com/cosmos/ibc-go/pull/2034) Transfer Keeper now expects a keeper which fulfills the expected `ScopedKeeper` interface for the capability keeper.
 * (05-port) [\#2025](https://github.com/cosmos/ibc-go/pull/2025) Port Keeper now expects a keeper which fulfills the expected `ScopedKeeper` interface for the capability keeper.
 * (04-channel) [\#2024](https://github.com/cosmos/ibc-go/pull/2024) Channel Keeper now expects a keeper which fulfills the expected `ScopedKeeper` interface for the capability keeper.

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

@@ -8,7 +8,6 @@ import (
 	"github.com/cosmos/cosmos-sdk/codec"
 	storetypes "github.com/cosmos/cosmos-sdk/store/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	capabilitykeeper "github.com/cosmos/cosmos-sdk/x/capability/keeper"
 	capabilitytypes "github.com/cosmos/cosmos-sdk/x/capability/types"
 	paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
 	"github.com/tendermint/tendermint/libs/log"
@@ -29,7 +28,7 @@ type Keeper struct {
 	channelKeeper icatypes.ChannelKeeper
 	portKeeper    icatypes.PortKeeper
 
-	scopedKeeper capabilitykeeper.ScopedKeeper
+	scopedKeeper icatypes.ScopedKeeper
 
 	msgRouter *baseapp.MsgServiceRouter
 }
@@ -38,7 +37,7 @@ type Keeper struct {
 func NewKeeper(
 	cdc codec.BinaryCodec, key storetypes.StoreKey, paramSpace paramtypes.Subspace,
 	ics4Wrapper icatypes.ICS4Wrapper, channelKeeper icatypes.ChannelKeeper, portKeeper icatypes.PortKeeper,
-	scopedKeeper capabilitykeeper.ScopedKeeper, msgRouter *baseapp.MsgServiceRouter,
+	scopedKeeper icatypes.ScopedKeeper, msgRouter *baseapp.MsgServiceRouter,
 ) Keeper {
 	// set KeyTable if it has not already been set
 	if !paramSpace.HasKeyTable() {

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

@@ -8,7 +8,6 @@ import (
 	"github.com/cosmos/cosmos-sdk/codec"
 	storetypes "github.com/cosmos/cosmos-sdk/store/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	capabilitykeeper "github.com/cosmos/cosmos-sdk/x/capability/keeper"
 	capabilitytypes "github.com/cosmos/cosmos-sdk/x/capability/types"
 	paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
 	"github.com/tendermint/tendermint/libs/log"
@@ -29,7 +28,7 @@ type Keeper struct {
 	portKeeper    icatypes.PortKeeper
 	accountKeeper icatypes.AccountKeeper
 
-	scopedKeeper capabilitykeeper.ScopedKeeper
+	scopedKeeper icatypes.ScopedKeeper
 
 	msgRouter *baseapp.MsgServiceRouter
 }
@@ -38,7 +37,7 @@ type Keeper struct {
 func NewKeeper(
 	cdc codec.BinaryCodec, key storetypes.StoreKey, paramSpace paramtypes.Subspace,
 	channelKeeper icatypes.ChannelKeeper, portKeeper icatypes.PortKeeper,
-	accountKeeper icatypes.AccountKeeper, scopedKeeper capabilitykeeper.ScopedKeeper, msgRouter *baseapp.MsgServiceRouter,
+	accountKeeper icatypes.AccountKeeper, scopedKeeper icatypes.ScopedKeeper, msgRouter *baseapp.MsgServiceRouter,
 ) Keeper {
 	// ensure ibc interchain accounts module account is set
 	if addr := accountKeeper.GetModuleAddress(icatypes.ModuleName); addr == nil {

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

@@ -36,3 +36,11 @@ type PortKeeper interface {
 	BindPort(ctx sdk.Context, portID string) *capabilitytypes.Capability
 	IsBound(ctx sdk.Context, portID string) bool
 }
+
+// ScopedKeeper defines the expected x/capability scoped keeper interface
+type ScopedKeeper interface {
+	GetCapability(ctx sdk.Context, name string) (*capabilitytypes.Capability, bool)
+	AuthenticateCapability(ctx sdk.Context, cap *capabilitytypes.Capability, name string) bool
+	LookupModules(ctx sdk.Context, name string) ([]string, *capabilitytypes.Capability, error)
+	ClaimCapability(ctx sdk.Context, cap *capabilitytypes.Capability, name string) error
+}