fix: remove moment dependency

Author: ernest-okot

README.md

@@ -128,11 +128,7 @@ collections
   })
   .then(accountBalance => console.log({ accountBalance }))
   .catch(error => {
-    if (error.response) {
-      return console.log(error.response.data, error.response.config);
-    }
-
-    return console.log(error.message);
+    console.log(error);
   });
 ```
 
@@ -211,10 +207,6 @@ disbursements
   })
   .then(accountBalance => console.log({ accountBalance }))
   .catch(error => {
-    if (error.response) {
-      console.log(error.response.data, error.response.config);
-    }
-
-    console.log(error.message);
+    console.log(error);
   });
 ```

examples/disbursements.js

@@ -37,9 +37,5 @@ disbursements
   })
   .then(accountBalance => console.log({ accountBalance }))
   .catch(error => {
-    if (error.response) {
-      console.log(error.response.data, error.response.config);
-    }
-
-    console.log(error.message);
+    console.log(error);
   });

package-lock.json

@@ -25,7 +25,8 @@
   },
   "keywords": [
     "MTN",
-    "Mobile Money",
+    "Mobile",
+    "Money",
     "Momo",
     "TypeScript",
     "NodeJS"
@@ -37,7 +38,6 @@
   "dependencies": {
     "axios": "^0.18.0",
     "commander": "^2.19.0",
-    "moment": "^2.22.2",
     "uuid": "^3.3.2"
   },
   "devDependencies": {

package.json

@@ -1,5 +1,4 @@
 import { AxiosInstance } from "axios";
-import moment from "moment";
 
 import { createClient } from "./client";
 
@@ -14,7 +13,7 @@ export type Authorizer = (
 
 interface OAuthCredentials {
   accessToken: string;
-  expires: Date;
+  expires: number;
 }
 
 export function createTokenRefresher(
@@ -27,11 +26,10 @@ export function createTokenRefresher(
       return authorize(config)
         .then((accessToken: AccessToken) => {
           const { access_token, expires_in }: AccessToken = accessToken;
+          const expires: number = Date.now() + expires_in * 1000 - 60000;
           return {
             accessToken: access_token,
-            expires: moment()
-              .add(expires_in, "seconds")
-              .toDate()
+            expires
           };
         })
         .then(freshCredentials => {
@@ -83,5 +81,5 @@ function isExpired(credentials: OAuthCredentials): boolean {
     return true;
   }
 
-  return moment().isAfter(credentials.expires);
+  return Date.now() > credentials.expires;
 }