GenericAsyncStorage.tsx

import { AsyncStorage } from 'react-native';

export default class GenericAsyncStorage {
  static async getItem<T>(key: string, callback?: (error?: Error, result?: T) => void): Promise<T> {
    const item = await AsyncStorage.getItem(key);
    return JSON.parse(item);
  }

  static async setItem<T>(
    key: string,
    value: T,
    callback?: (error?: Error) => void,
  ): Promise<void> {
    await AsyncStorage.setItem(key, JSON.stringify(value));
  }
}