Typescript Voucher Code Generator

voucher-code-generator.d.ts

interface VoucherCodeConfig {
  length?: number;
  count?: number;
  charset?: string;
  prefix?: string;
  postfix?: string;
  pattern?: string;
}

interface VoucherCodeGenerator {
  generate(config?: VoucherCodeConfig): string[];
}

declare var voucher_codes: VoucherCodeGenerator;

declare module 'voucher-code-generator' {
  export = voucher_codes;
}

thnx