export declare function rand(min: number, max: number, decimal?: number): number;
export interface RandStringOptions {
    max: number;
    number: boolean;
    letter: boolean;
    upper: boolean;
    lower: boolean;
    custom: string | string[];
}
export declare function randString(length: number, options?: Partial<RandStringOptions>): string;
export declare function uuid(): string;