@nuwa-ai/identity-kit-web/dist/keystore/LocalStorageKeyStore.js

Web extensions for Nuwa Identity Kit

/**
 * Browser LocalStorage implementation of KeyStore
 */
export class LocalStorageKeyStore {
    constructor(options = {}) {
        this.prefix = options.prefix || 'nuwa_keystore_';
    }
    /**
     * List all key IDs stored in this KeyStore
     */
    async listKeyIds() {
        const keys = [];
        for (let i = 0; i < localStorage.length; i++) {
            const key = localStorage.key(i);
            if (key && key.startsWith(this.prefix)) {
                keys.push(key.substring(this.prefix.length));
            }
        }
        return keys;
    }
    /**
     * Load a key by ID, or all keys if no ID is provided
     */
    async load(keyId) {
        if (!keyId) {
            const keys = await this.listKeyIds();
            if (keys.length === 0) {
                return null;
            }
            return this.load(keys[0]);
        }
        const stored = localStorage.getItem(this.prefix + keyId);
        if (!stored) {
            return null;
        }
        try {
            return JSON.parse(stored);
        }
        catch (e) {
            console.error('Failed to parse stored key:', e);
            return null;
        }
    }
    /**
     * Save a key to storage
     */
    async save(key) {
        localStorage.setItem(this.prefix + key.keyId, JSON.stringify(key));
    }
    /**
     * Clear a key from storage, or all keys if no ID is provided
     */
    async clear(keyId) {
        if (!keyId) {
            const keys = await this.listKeyIds();
            for (const key of keys) {
                await this.clear(key);
            }
            return;
        }
        localStorage.removeItem(this.prefix + keyId);
    }
}