export declare const u32: (arr: Uint8Array) => Uint32Array;
export declare const nextTick: () => Promise<void>;
export declare function checkOpts<T1 extends {}, T2 extends {}>(defaults: T1, opts?: T2): T1 & T2;
export declare const asyncLoop: (iters: number, tick: number, cb: (i: number) => void) => Promise<void>;