feat: integrate otplib for TOTP authentication and remove deprecated TOTP utility

src/rest/APIRequest.js

@@ -2,15 +2,10 @@
 
 const Buffer = require('node:buffer').Buffer;
 const { setTimeout } = require('node:timers');
-const makeFetchCookie = require('fetch-cookie');
-const { CookieJar } = require('tough-cookie');
-const { fetch: fetchOriginal, FormData, buildConnector, Client, ProxyAgent } = require('undici');
+const { FormData, buildConnector, Client, ProxyAgent } = require('undici');
 const { ciphers } = require('../util/Constants');
 const Util = require('../util/Util');
 
-const cookieJar = new CookieJar();
-const fetch = makeFetchCookie.default(fetchOriginal, cookieJar);
-
 let agent = null;
 
 class APIRequest {
@@ -142,15 +137,17 @@ class APIRequest {
 
     const controller = new AbortController();
     const timeout = setTimeout(() => controller.abort(), this.client.options.restRequestTimeout).unref();
-    return fetch(url, {
-      method: this.method.toUpperCase(), // Undici doesn't normalize "patch" into "PATCH" (which surprisingly follows the spec).
-      headers,
-      body,
-      signal: controller.signal,
-      redirect: 'follow',
-      dispatcher: agent,
-      credentials: 'include',
-    }).finally(() => clearTimeout(timeout));
+    return this.rest
+      .fetch(url, {
+        method: this.method.toUpperCase(), // Undici doesn't normalize "patch" into "PATCH" (which surprisingly follows the spec).
+        headers,
+        body,
+        signal: controller.signal,
+        redirect: 'follow',
+        dispatcher: agent,
+        credentials: 'include',
+      })
+      .finally(() => clearTimeout(timeout));
   }
 }
 

src/rest/RESTManager.js

@@ -2,6 +2,9 @@
 
 const { setInterval } = require('node:timers');
 const { Collection } = require('@discordjs/collection');
+const makeFetchCookie = require('fetch-cookie');
+const { CookieJar } = require('tough-cookie');
+const { fetch: fetchOriginal } = require('undici');
 const APIRequest = require('./APIRequest');
 const routeBuilder = require('./APIRouter');
 const RequestHandler = require('./RequestHandler');
@@ -17,6 +20,8 @@ class RESTManager {
     this.globalRemaining = this.globalLimit;
     this.globalReset = null;
     this.globalDelay = null;
+    this.cookieJar = new CookieJar();
+    this.fetch = makeFetchCookie.default(fetchOriginal, this.cookieJar);
     if (client.options.restSweepInterval > 0) {
       this.sweepInterval = setInterval(() => {
         this.handlers.sweep(handler => handler._inactive);

src/rest/RequestHandler.js

@@ -9,7 +9,6 @@ const RateLimitError = require('./RateLimitError');
 const {
   Events: { DEBUG, RATE_LIMIT, INVALID_REQUEST_WARNING, API_RESPONSE, API_REQUEST },
 } = require('../util/Constants');
-const TOTP = require('../util/Totp');
 
 const captchaMessage = [
   'incorrect-captcha',
@@ -396,7 +395,7 @@ class RequestHandler {
           request.retries < 1
         ) {
           // Get mfa code
-          const { otp } = await TOTP.generate(this.manager.client.options.TOTPKey);
+          const otp = this.manager.client.authenticator.generate(this.manager.client.options.TOTPKey);
           this.manager.client.emit(
             DEBUG,
             `${data.message}