App/constants/storage.ts

import { MMKV } from "react-native-mmkv";
import { createSyncStoragePersister } from "@tanstack/query-sync-storage-persister";

export const storage = new MMKV();

const clientStorage = {
    setItem: (key: string, value: string | number | boolean | Uint8Array) => {
      storage.set(key, value);
    },
    getItem: (key: string) => {
      const value = storage.getString(key);
      return value === undefined ? null : value;
    },
    removeItem: (key: string) => {
      storage.delete(key);
    },
  };
  
  export const clientPersister = createSyncStoragePersister({ storage: clientStorage });