export type GenerateHashOptions = {
    ambiguous?: boolean;
    lower?: boolean | string;
    upper?: boolean | string;
    numeric?: boolean | string;
    alpha?: boolean | string;
    symbols?: boolean | string;
    startWithLetter?: boolean;
    all?: string;
    only?: string;
    prefix?: string;
};
export declare const generateHash: (length?: number, options?: GenerateHashOptions) => string;