02-client routing: function in store provider to return client store (#…

…5824)

* add function to return 02-client module store

* review comment

modules/core/02-client/types/store.go

@@ -30,3 +30,8 @@ func (s storeProvider) ClientStore(ctx sdk.Context, clientID string) storetypes.
 	clientPrefix := []byte(fmt.Sprintf("%s/%s/", host.KeyClientStorePrefix, clientID))
 	return prefix.NewStore(ctx.KVStore(s.storeKey), clientPrefix)
 }
+
+// ModuleStore returns the 02-client module store
+func (s storeProvider) ModuleStore(ctx sdk.Context, clientType string) storetypes.KVStore {
+	return prefix.NewStore(ctx.KVStore(s.storeKey), host.PrefixedClientStoreKey([]byte(clientType)))
+}