/**
 * Platform detection and crypto backend selection.
 *
 * The backend is lazily loaded to support both conditional imports
 * and runtime detection.
 */
import type { CryptoBackend } from './types.js';
/**
 * Get the appropriate crypto backend for the current platform.
 *
 * This is the main entry point for obtaining crypto primitives.
 * The backend is cached after first load.
 *
 * @example
 * ```typescript
 * const crypto = await getCrypto();
 * const hash = crypto.sha3_256(data);
 * ```
 */
export declare function getCrypto(): Promise<CryptoBackend>;
/**
 * Get crypto backend synchronously.
 *
 * Only use this after getCrypto() has been called at least once,
 * or if you're certain about the platform and the backend is pre-loaded.
 *
 * @throws Error if backend hasn't been loaded yet
 */
export declare function getCryptoSync(): CryptoBackend;
/**
 * Inject a custom crypto backend.
 *
 * Useful for testing or custom implementations.
 */
export declare function setCrypto(backend: CryptoBackend): void;
//# sourceMappingURL=platform.d.ts.map