fixing typing

.eslintrc.js

@@ -0,0 +1,19 @@
+module.exports = {
+    "env": {
+        "commonjs": true,
+        "es6": true,
+        "node": true
+    },
+    "extends": "eslint:recommended",
+    "globals": {
+        "Atomics": "readonly",
+        "SharedArrayBuffer": "readonly"
+    },
+    "parser": "@typescript-eslint/parser",
+    "plugins": ["@typescript-eslint"],
+    "parserOptions": {
+        "ecmaVersion": 2018
+    },
+    "rules": {
+    }
+};

package.json

@@ -19,6 +19,8 @@
     "@types/chai": "^4.1.7",
     "@types/mocha": "^5.2.7",
     "@types/nock": "^10.0.3",
+    "@typescript-eslint/eslint-plugin": "^2.10.0",
+    "@typescript-eslint/parser": "^2.10.0",
     "babel-cli": "^6.9.0",
     "babel-core": "^6.9.0",
     "babel-eslint": "^6.0.4",

src/JwksClient.js

@@ -5,8 +5,25 @@ const LRU = require('lru-cache')
 
 const {JwksError} = require('./errors')
 const SigningKeyNotFoundError = require('./errors/SigningKeyNotFoundError')
+/**
+ * @callbck Callback
+ * @param {Error} error
+ * @param {object} key
+ */
 
+/**
+ * @typedef {object} JwksClientOptions
+ * @prop {boolean} cache
+ * @prop {boolean} strictSsl
+ */
+
+/**
+ * @class
+ */
 module.exports.JwksClient = class JwksClient {
+  /**
+   * @param {JwksClientOptions} options
+   */
   constructor (options) {
     this.options = {
       cache: false,
@@ -21,7 +38,9 @@ module.exports.JwksClient = class JwksClient {
       this.cache = new LRU(options)
     }
   }
-
+  /**
+   * @param {Callback} cb
+   */
   getKeys (cb) {
     this.logger(`Fetching keys from '${this.options.jwksUri}'`)
     request({
@@ -46,6 +65,9 @@ module.exports.JwksClient = class JwksClient {
     })
   }
 
+  /**
+   * @param {Callback} cb
+   */
   getSigningKeys (cb) {
     this.getKeys((err, keys) => {
       if (err) {
@@ -79,6 +101,11 @@ module.exports.JwksClient = class JwksClient {
     })
   }
 
+
+  /**
+   * @param {string} kid
+   * @param {Callback} cb
+   */
   getSigningKey (kid, cb) {
     this.logger(`Fetching signing key for '${kid}'`)