pirica · July 24, 2021 11:01 · Mar 24, 2020
diff --git a/auth.js b/auth.js
@@ -0,0 +1,74 @@
+// by joe/mix
+const request = require("request-promise");
+
+module.exports = {
+    /**
+     * Login to an account.
+     * @param {string} email 
+     * @param {string} password 
+     */
+    async authenticate(email, password) {
+        let jar = await request.jar();
+
+        await this.sendEpicRequest("https://www.epicgames.com/id/api/reputation", jar);
+        await this.sendEpicRequest("https://www.epicgames.com/id/api/authenticate", jar);
+        await this.sendEpicRequest("https://www.epicgames.com/id/api/location", jar);
+
+        const csrf = await this.sendEpicRequest("https://www.epicgames.com/id/api/csrf", jar);
+
+        const cookies = JSON.parse(JSON.stringify(jar))._jar["cookies"];
+
+        const login = await request({
+            url: "https://www.epicgames.com/id/api/login",
+            method: "POST",
+            headers: {
+                "x-xsrf-token": cookies.find(i => i.key === "XSRF-TOKEN").value,
+                "Content-Type": "application/json",
+            },
+            jar: jar,
+            form: {
+                "email": email,
+                "password": password,
+                "rememberMe": true
+            }
+        });
+
+        const exchange = await request({
+            url: "https://www.epicgames.com/id/api/exchange",
+            headers: {
+                "x-xsrf-token": cookies.find(i => i.key === "XSRF-TOKEN").value,
+                "Content-Type": "application/json",
+            },
+            jar: jar,
+            json: true,
+        });
+
+        const token = await request({
+            url: "https://account-public-service-prod03.ol.epicgames.com/account/api/oauth/token",
+            method: "POST",
+            headers: {
+                "Content-Type": "application/x-www-form-urlencoded",
+                "Authorization": "basic ZWM2ODRiOGM2ODdmNDc5ZmFkZWEzY2IyYWQ4M2Y1YzY6ZTFmMzFjMjExZjI4NDEzMTg2MjYyZDM3YTEzZmM4NGQ=" // https://github.com/MixV2/EpicResearch#1231-authorization-header
+            },
+            form: {
+                grant_type: "exchange_code",
+                exchange_code: exchange["code"],
+                includePerms: false
+            },
+            json: true
+        })
+
+        return token;
+    },
+
+    /**
+     * Sends an "Epic" request, reuses cookie jar and shortens to one line.
+     * @param {string} url 
+     */
+    async sendEpicRequest(url, jar) {
+        return await request({
+            url,
+            jar
+        })
+    }
+}
diff --git a/test.js b/test.js
@@ -0,0 +1,9 @@
+const auth = require("./auth");
+
+/**
+ * An async function that authenticates and logs the account token.
+ */
+( async () => {
+    const login = await auth.authenticate("[email protected]", "GreatPassword");
+    console.log(login);
+})();