export declare const sleep: (ms: number) => Promise<void>;
export declare const retry: <T>(fn: () => Promise<T>, retries?: number, delay?: number) => Promise<T>;
export declare const chunk: <T>(array: T[], size: number) => T[][];
export declare const unique: <T>(array: T[]) => T[];
export declare const flatten: <T>(array: T[][]) => T[];
export declare const isValidAddress: (address: string) => boolean;
export declare const isValidAmount: (amount: string) => boolean;
export declare const isValidPermlink: (permlink: string) => boolean;
export { debug } from './debug';