@apogeelabs/expo-secure-compressed-storage

A wrapper around expo-secure-store that adds automatic compression and chunking for large data storage.

Features

• Automatic compression using LZ-String for significant space savings
• Automatic chunking for data larger than secure store limits (~2KB)
• Transparent API - works exactly like expo-secure-store but handles large data
• TypeScript support with full type definitions
• Configurable chunk size and logging

Installation

npm install @apogeelabs/expo-secure-compressed-storage
# or
yarn add @apogeelabs/expo-secure-compressed-storage

Usage

import {
    setItemAsync,
    getItemAsync,
    deleteItemAsync,
} from "@apogeelabs/expo-secure-compressed-storage";

// Store data (automatically compresses and chunks)
await setItemAsync("user_data", largeObject);

// Retrieve data (automatically decompresses and reconstructs)
const data = await getItemAsync("user_data");
// data is already parsed - no need for JSON.parse()

// Delete data
await deleteItemAsync("user_data");

API

setItemAsync<T>(key: string, value: T, storageType?: StorageType): Promise<void>

Stores a value with automatic compression and chunking.

• key: Alphanumeric with underscores only (e.g., user_data, settings_v2)
• value: Any value to store (will be JSON stringified)
• storageType: Optional override for storage behavior

getItemAsync<T>(key: string): Promise<T | null>

Retrieves stored data with automatic decompression and reconstruction. Returns the parsed object directly.

deleteItemAsync(key: string): Promise<void>

Removes all data associated with the key.

Configuration

import { configure } from "@apogeelabs/expo-secure-compressed-storage";

configure({
    chunkSize: 2000, // Default: 2048
    logger: {
        error: (msg, ...args) => console.error(msg, ...args),
        // ... other log methods
    },
});

Storage Types

• COMPRESSED: Data is compressed using LZ-String before storage
• UNCOMPRESSED: Data is stored without compression

Note: All data is automatically chunked for consistent behavior, regardless of storage type.

Requirements

• React Native with Expo
• Node.js >= 18
• expo-secure-store ~13.0.2

License

ISC