Add Stripe Checkout definitions

Fixes #4366.

stripe-checkout/stripe-checkout-tests.ts

@@ -0,0 +1,38 @@
+/// <reference path="stripe-checkout.d.ts" />
+
+// Test the minimum amount of configuration required.
+var handler = StripeCheckout.configure({
+	key: "my-secret-key",
+	token: function(token: StripeTokenResponse) {
+		console.log(token.id);
+	}
+});
+
+handler.open();
+
+handler.close();
+
+// Test all configuration options.
+var options = {
+	key: "my-secret-key",
+	token: function(token: StripeTokenResponse) {
+		console.log(token.id);
+	},
+    image: "http://placehold.it/128x128",
+    name: "Definitely Typed",
+    description: "A DefinitelyTyped test for Stripe Checkout",
+    amount: Number.MAX_VALUE,
+    currency: "USD",
+    panelLabel: "Pay Definitely Typed {{amount}}",
+    label: "Pay Definitely Typed",
+    zipCode: false,
+    email: "test@example.com",
+    allowRememberMe: false,
+    bitcoin: false,
+    opened: function() {},
+    closed: function() {}
+}
+
+handler = StripeCheckout.configure(options);
+
+handler.open(options);

stripe-checkout/stripe-checkout.d.ts

@@ -0,0 +1,35 @@
+// Type definitions for Stripe Checkout
+// Project: https://stripe.com/checkout
+// Definitions by: Chris Wrench <https://github.com/cgwrench>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../stripe/stripe.d.ts"/>
+
+interface StripeCheckoutStatic {
+    configure(options: StripeCheckoutOptions): StripeCheckoutHandler;
+}
+
+interface StripeCheckoutHandler {
+    open(options?: StripeCheckoutOptions): void;
+    close(): void;
+}
+
+interface StripeCheckoutOptions {
+    key: string;
+    token: (token: StripeTokenResponse) => void;
+    image?: string;
+    name?: string;
+    description?: string;
+    amount?: number;
+    currency?: string;
+    panelLabel?: string;
+    zipCode?: boolean;
+    email?: string;
+    label?: string;
+    allowRememberMe?: boolean;
+    bitcoin?: boolean;
+    opened?: () => void;
+    closed?: () => void;
+}
+
+declare var StripeCheckout: StripeCheckoutStatic;