@@ -0,0 +1,30 @@
+import { AsyncStorage } from 'react-native';
+
+class AsyncStorageHelper {
+
+  static add(key, value, call) {
+    AsyncStorage.setItem(key, value, () => (
+      AsyncStorage.getItem(key, (err, result) => (
+        call(result)))));
+  }
+
+  static del(key, call) {
+    AsyncStorage.removeItem(
+      key, () => (
+        this.query(key, call)));
+  }
+
+  static update(key, value, call) {
+    AsyncStorage.mergeItem(
+      key, value, () => (
+        this.query(key, call)));
+  }
+
+  static query(key, call) {
+    AsyncStorage.getItem(
+      key, (err, result) => (
+        call(result)));
+  }
+
+}
+export default AsyncStorageHelper;