How to use webpay node module from typescript.

Setup.sh

npm install -g typescript
mkdir test
npm install webpay
tsc test.ts
node test.js

test.ts

/// <reference path="./typings/webpay/webpay.d.ts" />

import * as WebPay from "webpay";

var webpay = new WebPay('test_secret_eHn4TTgsGguBcW764a2KA8Yd');
webpay.charge.create({
  amount: 400,
  currency: "jpy",
  card: "tok_SampleCardToken",
  description: ""
}, function(err, res) {
  console.log(err, res);
});

webpay.d.ts

// place as typings/webpay/webpay.d.ts

declare interface WebPay {
  charge: Charge;
}

declare interface Charge {
  create: (params: any, callback: (err: any, res: any) => void) => void;
}

declare var WebPay: {
  new (token: string): WebPay;
}

declare module 'webpay' {
  export = WebPay;
}