feat: add a method to check if the scope module already exists in the capability keeper

modules/capability/CHANGELOG.md

@@ -41,6 +41,8 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Improvements
 
+* [\#6716](https://github.com/cosmos/ibc-go/pull/6716) Add `HasModule` to capability keeper to allow checking if a scoped module already exists.
+
 ### Features
 
 ### Bug Fixes

modules/capability/keeper/keeper.go

@@ -66,6 +66,12 @@ func NewKeeper(cdc codec.BinaryCodec, storeKey, memKey storetypes.StoreKey) *Kee
 	}
 }
 
+// HasModule checks if the module name already has a ScopedKeeper.
+func (k *Keeper) HasModule(moduleName string) bool {
+	_, ok := k.scopedModules[moduleName]
+	return ok
+}
+
 // ScopeToModule attempts to create and return a ScopedKeeper for a given module
 // by name. It will panic if the keeper is already sealed or if the module name
 // already has a ScopedKeeper.

modules/capability/keeper/keeper_test.go

@@ -76,6 +76,12 @@ func (suite *KeeperTestSuite) TestSeal() {
 	})
 }
 
+func (suite *KeeperTestSuite) TestHasModule() {
+	_ = suite.keeper.ScopeToModule(bankModuleName)
+	suite.Require().True(suite.keeper.HasModule(bankModuleName), "bank module does not exist")
+	suite.Require().False(suite.keeper.HasModule("invalid"), "invalid module exists")
+}
+
 func (suite *KeeperTestSuite) TestNewCapability() {
 	sk := suite.keeper.ScopeToModule(bankModuleName)