Migrate other Stripe infrastructure to TS

package.json

@@ -42,7 +42,7 @@
     "node-fetch": "^2.6.2",
     "nyc": "^15.1.0",
     "prettier": "^1.16.4",
-    "typescript": "^3.7.2"
+    "typescript": "^4.0.0"
   },
   "resolutions": {
     "ansi-regex": "5.0.1",

src/Webhooks.js → src/Webhooks.ts

@@ -1,10 +1,12 @@
 'use strict';
 
-const utils = require('./utils');
-const {StripeError, StripeSignatureVerificationError} = require('./Error');
+import utils = require('./utils');
+import _Error = require('./Error');
+const {StripeError, StripeSignatureVerificationError} = _Error;
 
 const Webhook = {
   DEFAULT_TOLERANCE: 300, // 5 minutes
+  signature: null,
 
   constructEvent(payload, header, secret, tolerance, cryptoProvider) {
     this.signature.verifyHeader(
@@ -169,6 +171,7 @@ function parseEventDetails(encodedPayload, encodedHeader, expectedScheme) {
   if (!details || details.timestamp === -1) {
     throw new StripeSignatureVerificationError({
       message: 'Unable to extract timestamp and signatures from header',
+      // @ts-expect-error Type '{ decodedHeader: any; decodedPayload: any; }' is not assignable to type 'string'.
       detail: {
         decodedHeader,
         decodedPayload,
@@ -179,6 +182,7 @@ function parseEventDetails(encodedPayload, encodedHeader, expectedScheme) {
   if (!details.signatures.length) {
     throw new StripeSignatureVerificationError({
       message: 'No signatures found with expected scheme',
+      // @ts-expect-error Type '{ decodedHeader: any; decodedPayload: any; }' is not assignable to type 'string'.
       detail: {
         decodedHeader,
         decodedPayload,
@@ -210,6 +214,7 @@ function validateComputedSignature(
         'No signatures found matching the expected signature for payload.' +
         ' Are you passing the raw request body you received from Stripe?' +
         ' https://github.com/stripe/stripe-node#webhook-signing',
+      // @ts-expect-error Type '{ header: any; payload: any; }' is not assignable to type 'string'.
       detail: {
         header,
         payload,
@@ -222,6 +227,7 @@ function validateComputedSignature(
   if (tolerance > 0 && timestampAge > tolerance) {
     throw new StripeSignatureVerificationError({
       message: 'Timestamp outside the tolerance zone',
+      // @ts-expect-error
       detail: {
         header,
         payload,
@@ -242,7 +248,7 @@ function parseHeader(header, scheme) {
       const kv = item.split('=');
 
       if (kv[0] === 't') {
-        accum.timestamp = kv[1];
+        accum.timestamp = parseInt(kv[1], 10);
       }
 
       if (kv[0] === scheme) {
@@ -274,4 +280,4 @@ function getNodeCryptoProvider() {
 
 Webhook.signature = signature;
 
-module.exports = Webhook;
+export = Webhook;

src/crypto/CryptoProvider.js → src/crypto/CryptoProvider.ts

@@ -13,7 +13,7 @@ class CryptoProvider {
    * - computeHMACSignature('', 'test_secret') => 'f7f9bd47fb987337b5796fdc1fdb9ba221d0d5396814bfcaf9521f43fd8927fd'
    * - computeHMACSignature('\ud83d\ude00', 'test_secret') => '837da296d05c4fe31f61d5d7ead035099d9585a5bcde87de952012a78f0b0c43
    */
-  computeHMACSignature(payload, secret) {
+  computeHMACSignature(payload: string, secret: string): string {
     throw new Error('computeHMACSignature not implemented.');
   }
 
@@ -28,9 +28,9 @@ class CryptoProvider {
    * - computeHMACSignature('', 'test_secret') => 'f7f9bd47fb987337b5796fdc1fdb9ba221d0d5396814bfcaf9521f43fd8927fd'
    * - computeHMACSignature('\ud83d\ude00', 'test_secret') => '837da296d05c4fe31f61d5d7ead035099d9585a5bcde87de952012a78f0b0c43
    */
-  computeHMACSignatureAsync(payload, secret) {
+  computeHMACSignatureAsync(payload: string, secret: string): Promise<string> {
     throw new Error('computeHMACSignatureAsync not implemented.');
   }
 }
 
-module.exports = CryptoProvider;
+export = CryptoProvider;

src/crypto/NodeCryptoProvider.js → src/crypto/NodeCryptoProvider.ts

@@ -1,26 +1,29 @@
 'use strict';
 
-const crypto = require('crypto');
+import crypto = require('crypto');
 
-const CryptoProvider = require('./CryptoProvider');
+import CryptoProvider = require('./CryptoProvider');
 
 /**
  * `CryptoProvider which uses the Node `crypto` package for its computations.
  */
 class NodeCryptoProvider extends CryptoProvider {
   /** @override */
-  computeHMACSignature(payload, secret) {
+  computeHMACSignature(payload: string, secret: string): string {
     return crypto
       .createHmac('sha256', secret)
       .update(payload, 'utf8')
       .digest('hex');
   }
 
   /** @override */
-  async computeHMACSignatureAsync(payload, secret) {
+  async computeHMACSignatureAsync(
+    payload: string,
+    secret: string
+  ): Promise<string> {
     const signature = await this.computeHMACSignature(payload, secret);
     return signature;
   }
 }
 
-module.exports = NodeCryptoProvider;
+export = NodeCryptoProvider;

src/crypto/SubtleCryptoProvider.js → src/crypto/SubtleCryptoProvider.ts

@@ -1,13 +1,15 @@
 'use strict';
 
-const CryptoProvider = require('./CryptoProvider');
+import CryptoProvider = require('./CryptoProvider');
 
 /**
  * `CryptoProvider which uses the SubtleCrypto interface of the Web Crypto API.
  *
  * This only supports asynchronous operations.
  */
 class SubtleCryptoProvider extends CryptoProvider {
+  subtleCrypto: any;
+
   constructor(subtleCrypto) {
     super();
 
@@ -18,15 +20,15 @@ class SubtleCryptoProvider extends CryptoProvider {
   }
 
   /** @override */
-  computeHMACSignature(payload, secret) {
+  computeHMACSignature(payload: string, secret: string): string {
     throw new Error(
       'SubtleCryptoProvider cannot be used in a synchronous context.'
     );
   }
 
   /** @override */
   async computeHMACSignatureAsync(payload, secret) {
-    const encoder = new TextEncoder('utf-8');
+    const encoder = new TextEncoder();
 
     const key = await this.subtleCrypto.importKey(
       'raw',
@@ -66,4 +68,4 @@ for (let i = 0; i < byteHexMapping.length; i++) {
   byteHexMapping[i] = i.toString(16).padStart(2, '0');
 }
 
-module.exports = SubtleCryptoProvider;
+export = SubtleCryptoProvider;

src/multipart.js → src/multipart.ts

@@ -1,7 +1,8 @@
 'use strict';
 
-const utils = require('./utils');
-const {StripeError} = require('./Error');
+import utils = require('./utils');
+import _Error = require('./Error');
+const {StripeError} = _Error;
 
 class StreamProcessingError extends StripeError {}
 
@@ -33,7 +34,7 @@ const multipartDataGenerator = (method, data, headers) => {
   for (const k in flattenedData) {
     const v = flattenedData[k];
     push(`--${segno}`);
-    if (v.hasOwnProperty('data')) {
+    if (Object.prototype.hasOwnProperty.call(v, 'data')) {
       push(
         `Content-Disposition: form-data; name=${q(k)}; filename=${q(
           v.name || 'blob'
@@ -93,4 +94,6 @@ const multipartRequestDataProcessor = (method, data, headers, callback) => {
   return callback(null, buffer);
 };
 
-module.exports.multipartRequestDataProcessor = multipartRequestDataProcessor;
+export = {
+  multipartRequestDataProcessor: multipartRequestDataProcessor,
+};

src/net/FetchHttpClient.js → src/net/FetchHttpClient.ts

@@ -1,6 +1,7 @@
 'use strict';
 
-const {HttpClient, HttpClientResponse} = require('./HttpClient');
+import _HttpClient = require('./HttpClient');
+const {HttpClient, HttpClientResponse} = _HttpClient;
 
 /**
  * HTTP client which uses a `fetch` function to issue requests.
@@ -11,6 +12,9 @@ const {HttpClient, HttpClientResponse} = require('./HttpClient');
  * node-fetch package (https://github.com/node-fetch/node-fetch).
  */
 class FetchHttpClient extends HttpClient {
+  _fetchFn: any;
+  _res: any;
+
   constructor(fetchFn) {
     super();
     this._fetchFn = fetchFn;
@@ -88,6 +92,8 @@ class FetchHttpClient extends HttpClient {
 }
 
 class FetchHttpClientResponse extends HttpClientResponse {
+  _res: any;
+
   constructor(res) {
     super(
       res.status,
@@ -135,4 +141,4 @@ class FetchHttpClientResponse extends HttpClientResponse {
   }
 }
 
-module.exports = {FetchHttpClient, FetchHttpClientResponse};
+export = {FetchHttpClient, FetchHttpClientResponse};