export declare class Encoder {
    private alphabet;
    private hexChars;
    private strChars;
    constructor(alphabet?: string, hexChars?: number, strChars?: number);
    charToNumber(character: string): number;
    numberToChar(number: number): string;
    numberToString(number: number, minLength?: number): string;
    stringToNumber(str: string): number;
    hexToString(hex: string): string;
    stringToHex(str: string): string;
}