accounts/dist/react-native/expoSecureStore.js

Tempo Accounts SDK

import { Base64, Bytes } from 'ox';
const key_name = 'tempo.mmkvEncryptionKey';
/** Loads or creates the key used to encrypt an MMKV-backed SDK storage instance. */
export async function getOrCreateMmkvEncryptionKey(options = {}) {
    const SecureStore = await import('expo-secure-store');
    const name = options.name ?? key_name;
    const store = options.store ?? {
        keychainAccessible: SecureStore.AFTER_FIRST_UNLOCK_THIS_DEVICE_ONLY,
    };
    const existing = await SecureStore.getItemAsync(name, store);
    if (existing)
        return existing;
    const key = createKey();
    await SecureStore.setItemAsync(name, key, store);
    return key;
}
// 24 random bytes encode to 32 base64 characters, MMKV's maximum AES-256 key length.
function createKey() {
    return Base64.fromBytes(Bytes.random(24));
}
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