Remade auth.rs and adapted main.rs with it.

src/auth.rs

@@ -1,315 +1,458 @@
-use std::thread::AccessError;
-use reqwest::blocking::*;
+use crate::auth::GameAuthenticationError::{IllegalParameter, IllegalRequest, IllegalResponse};
 use log::*;
-use serde::Deserialize;
+use reqwest::{blocking::*, header::*, StatusCode};
+use serde::*;
+use std::collections::HashMap;
+use std::{error::Error, fmt::Display};
 
-const OAUTH_TOKEN : (&str, &str)= (
+const OAUTH_TOKEN: (&str, &str) = (
     "3f69e56c7649492c8cc29f1af08a8a12", // Client
     "b51ee9cb12234f50a69efa67ef53812e", // Secret
 );
 
+/// Describes possible errors that may come from the functions and methods in this module.
 #[derive(Debug)]
-pub struct DeviceCredentials {
-    access_token : String,
-    pub account_id : String,
-    device_id : String,
+pub enum GameAuthenticationError {
+    IllegalParameter(String),
+    IllegalRequest(String),
+    IllegalResponse(String),
+    RequestFailed,
+}
+
+impl Display for GameAuthenticationError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{:?}", self)
+    }
+}
+
+impl Error for GameAuthenticationError {
+    fn source(&self) -> Option<&(dyn Error + 'static)> {
+        todo!();
+        match self {
+            IllegalParameter(reason) => Some(&IllegalParameter(reason.to_owned())),
+            IllegalResponse(reason) => Some(&IllegalResponse(reason.to_owned())),
+            GameAuthenticationError::IllegalRequest(reason) => {
+                Some(&IllegalRequest(reason.to_owned()))
+            }
+            _ => None,
+        }
+    }
+}
+
+pub enum ClientType {
+    ANDROID,
+    GENERIC,
+    PC,
+}
+
+#[derive(Debug)]
+pub struct AccessToken(pub String);
+
+impl AccessToken {
+    pub fn new() -> AccessToken {
+        AccessToken(String::new())
+    }
+
+    pub fn from(access_token: AccessToken) -> AccessToken {
+        AccessToken(access_token.0)
+    }
+    pub fn from_authcode(
+        http_client: &reqwest::blocking::Client,
+        authcode: &str,
+        persistent_credentials: Option<&mut PersistentCredentials>,
+        client_type: ClientType,
+    ) -> Result<AccessToken, Box<dyn Error>> {
+        if authcode.is_empty() {
+            error!("Authentication code for access token cannot be empty");
+            Err(Box::new(GameAuthenticationError::IllegalParameter(
+                "Authentication code for access token cannot be empty".to_string(),
+            )))?;
+        }
+
+        #[derive(Debug, Deserialize)]
+        struct ResponseContent {
+            access_token: String,
+            account_id: String,
+        }
+
+        const URL: &str =
+            "https://account-public-service-prod.ol.epicgames.com/account/api/oauth/token";
+
+        /* Request Headers */
+        let mut request_headers = HeaderMap::new();
+        request_headers.insert(
+            "Content-Type",
+            HeaderValue::from_static("application/x-www-form-urlencoded"),
+        );
+        request_headers.insert(
+            "Authorization",
+            HeaderValue::from_static(match client_type {
+                ClientType::ANDROID => "Basic M2Y2OWU1NmM3NjQ5NDkyYzhjYzI5ZjFhZjA4YThhMTI6YjUxZWU5Y2IxMjIzNGY1MGE2OWVmYTY3ZWY1MzgxMmU=",
+                ClientType::PC => "BASIC MzRhMDJjZjhmNDQxNGUyOWIxNTkyMTg3NmRhMzZmOWE6ZGFhZmJjY2M3Mzc3NDUwMzlkZmZlNTNkOTRmYzc2Y2Y=",
+                ClientType::GENERIC => "Basic MzRhMDJjZjhmNDQxNGUyOWIxNTkyMTg3NmRhMzZmOWE6ZGFhZmJjY2M3Mzc3NDUwMzlkZmZlNTNkOTRmYzc2Y2Y=",
+            }),
+        );
+
+        /* Request Body */
+        // "grant_type=authorization_code&code=<authcode>"
+        let request_body: reqwest::blocking::Body = reqwest::blocking::Body::from(
+            "grant_type=authorization_code&code=".trim().to_owned() + authcode.trim(),
+        );
+
+        /* Response Fetching */
+        let response = http_client
+            .post(URL)
+            .headers(request_headers)
+            .body(request_body)
+            .send()?;
+
+        info!("Got HTTP response: {:?}", response);
+        info!("Got HTTP response headers: {:?}", response.headers());
+        match response.status() {
+            StatusCode::OK => {
+                let response_content: ResponseContent = response.json::<ResponseContent>()?;
+
+                // WARN: Side effect here!!!
+                if persistent_credentials.is_some() {
+                    persistent_credentials.unwrap().account_id = response_content.account_id;
+                }
+
+                return Ok(AccessToken(response_content.access_token));
+            }
+
+            StatusCode::INTERNAL_SERVER_ERROR => {
+                error!("Internal Server Error when fetching Access Token with Authentication Code");
+                Err(Box::new(GameAuthenticationError::RequestFailed))?
+            }
+            StatusCode::UNAUTHORIZED => {
+                error!("Unauthorized action when fetching Access Token with Authentication Code");
+                Err(Box::new(GameAuthenticationError::IllegalRequest(
+                    "Unauthorized action when fetching Access Token with Authentication Code"
+                        .to_string(),
+                )))?
+            }
+            _ => {
+                error!("Unsupported response when fetching Access Token with Authentication Code");
+                error!("Got response {:?}", response.text().unwrap_or_default());
+                Err(Box::new(GameAuthenticationError::IllegalResponse(
+                    "Unsupported response when fetching Access Token with Authentication Code"
+                        .to_string(),
+                )))?
+            }
+        }
+    }
+    pub fn from_persistent_credentials(
+        http_client: &reqwest::blocking::Client,
+        credentials: &PersistentCredentials,
+        client_type: ClientType,
+    ) -> Result<AccessToken, Box<dyn Error>> {
+        // Checking credentials' content
+        {
+            if credentials.account_id.is_empty() {
+                Err(Box::new(IllegalParameter(
+                    "credentials.account_id cannot be empty".to_string(),
+                )))?;
+            }
+            if credentials.device_id.is_empty() {
+                Err(Box::new(IllegalParameter(
+                    "credentials.device_id cannot be empty".to_string(),
+                )))?;
+            }
+            if credentials.secret.is_empty() {
+                Err(Box::new(IllegalParameter(
+                    "credentials.secret cannot be empty".to_string(),
+                )))?
+            }
+        }
+
+        #[derive(Debug, Deserialize)]
+        struct ResponseContent {
+            access_token: String,
+        }
+
+        const URL: &str =
+            "https://account-public-service-prod.ol.epicgames.com/account/api/oauth/token";
+
+        let mut request_headers: HeaderMap = HeaderMap::new();
+        request_headers.insert(
+            "Content-Type",
+            HeaderValue::from_static("application/x-www-form-urlencoded"),
+        );
+        request_headers.insert(
+            "Authorization",
+            HeaderValue::from_static(match client_type {
+                ClientType::ANDROID => "Basic M2Y2OWU1NmM3NjQ5NDkyYzhjYzI5ZjFhZjA4YThhMTI6YjUxZWU5Y2IxMjIzNGY1MGE2OWVmYTY3ZWY1MzgxMmU=",
+                ClientType::PC => "BASIC MzRhMDJjZjhmNDQxNGUyOWIxNTkyMTg3NmRhMzZmOWE6ZGFhZmJjY2M3Mzc3NDUwMzlkZmZlNTNkOTRmYzc2Y2Y=",
+                ClientType::GENERIC => "Basic MzRhMDJjZjhmNDQxNGUyOWIxNTkyMTg3NmRhMzZmOWE6ZGFhZmJjY2M3Mzc3NDUwMzlkZmZlNTNkOTRmYzc2Y2Y=",
+            })
+        );
+
+        let request_body: reqwest::blocking::Body = reqwest::blocking::Body::from(
+            "grant_type=device_auth".to_string()
+                + "&account_id=".trim()
+                + &credentials.account_id
+                + "&device_id=".trim()
+                + &credentials.device_id
+                + "&secret=".trim()
+                + &credentials.secret,
+        );
+
+        let response = http_client
+            .post(URL)
+            .headers(request_headers)
+            .body(request_body)
+            .send()?;
+
+        match response.status() {
+            StatusCode::OK => {
+                let response_content: ResponseContent = response.json::<ResponseContent>()?;
+                return Ok(AccessToken(response_content.access_token));
+            }
+            StatusCode::INTERNAL_SERVER_ERROR => {
+                error!(
+                    "Internal Server Error when fetching Access Token with Persistent Credentials"
+                );
+                Err(Box::new(GameAuthenticationError::RequestFailed))?
+            }
+            StatusCode::UNAUTHORIZED => {
+                error!(
+                    "Unauthorized action when fetching Access Token with Persistent Credentials"
+                );
+                Err(Box::new(GameAuthenticationError::IllegalRequest(
+                    "Unauthorized action when fetching Access Token with Persistent Credentials"
+                        .to_string(),
+                )))?
+            }
+            _ => {
+                error!(
+                    "Unsupported response when fetching Access Token with Persistent Credentials"
+                );
+                error!("Got response:\n {:?}", response.text().unwrap_or_default());
+                Err(Box::new(GameAuthenticationError::IllegalResponse(
+                    "Unsupported response when fetching Access Token with Persistent Credentials"
+                        .to_string(),
+                )))?
+            }
+        }
+    }
+    pub fn from_exchange_code(
+        http_client: &Client,
+        exchange_code: &ExchangeCode,
+    ) -> Result<AccessToken, Box<dyn Error>> {
+        if exchange_code.0.is_empty() {
+            Err(Box::new(GameAuthenticationError::IllegalParameter(
+                "exchange_code cannot be empty".to_owned(),
+            )))?
+        }
+
+        #[derive(Debug, Deserialize)]
+        struct ResponseContent {
+            access_token: String,
+        }
+
+        const URL: &str =
+            "https://account-public-service-prod.ol.epicgames.com/account/api/oauth/token";
+
+        let mut request_headers: HeaderMap = HeaderMap::new();
+        request_headers.insert(
+            "Content-Type",
+            HeaderValue::from_static("application/x-www-form-urlencoded"),
+        );
+        request_headers.insert(
+            "Authorization",
+            HeaderValue::from_static("Basic MzRhMDJjZjhmNDQxNGUyOWIxNTkyMTg3NmRhMzZmOWE6ZGFhZmJjY2M3Mzc3NDUwMzlkZmZlNTNkOTRmYzc2Y2Y="),
+        );
+
+        let request_body: reqwest::blocking::Body = reqwest::blocking::Body::from(
+            "grant_type=exchange_code".to_string() + "&exchange_code=" + &exchange_code.0,
+        );
+
+        let response = http_client
+            .post(URL)
+            .headers(request_headers)
+            .body(request_body)
+            .send()?;
+
+        match response.status() {
+            StatusCode::OK => {
+                let response_content: ResponseContent = response.json::<ResponseContent>()?;
+                Ok(AccessToken(response_content.access_token))
+            }
+
+            StatusCode::INTERNAL_SERVER_ERROR => {
+                error!("Internal Server Error when fetching Access Token with Exchange Code");
+                Err(Box::new(GameAuthenticationError::RequestFailed))?
+            }
+            StatusCode::UNAUTHORIZED => {
+                error!("Unauthorized action when fetching Access Token with Exchange Code");
+                Err(Box::new(GameAuthenticationError::IllegalRequest(
+                    "Unauthorized action when fetching Access Token with Exchange Code".to_string(),
+                )))?
+            }
+            _ => {
+                error!("Unsupported response when fetching Access Token with Exchange Code");
+                error!("Got response {:?}", response.text().unwrap_or_default());
+                Err(Box::new(GameAuthenticationError::IllegalResponse(
+                    "Unsupported response when fetching Access Token with Exchange Code"
+                        .to_string(),
+                )))?
+            }
+        }
+    }
+}
+
+/// Contains the account info that can be kept on the device to login in the game
+#[derive(Debug)]
+pub struct PersistentCredentials {
+    pub account_id: String,
+    device_id: String,
     secret: String,
 }
 
-impl DeviceCredentials {
-    pub fn new() -> DeviceCredentials {
-        DeviceCredentials{
-            device_id: String::new(),
+impl PersistentCredentials {
+    /// Creates a new empty instance of PersistentCredentials.
+    pub fn new() -> PersistentCredentials {
+        PersistentCredentials {
             account_id: String::new(),
-            access_token: String::new(),
+            device_id: String::new(),
             secret: String::new(),
         }
     }
-    pub fn get_access_token_and_account_id(&mut self, http_client: &Client, authcode: &str) {
 
-        if authcode.is_empty() {
-            error!("Authentication Code cannot be empty");
-            return;
-        }
-
-        #[derive(Debug, Deserialize)]
-        struct ResponseStruct {
-            access_token: String,
-            expires_in: u16,
-            expires_at: String,
-            token_type: String,
-            refresh_token: String,
-            refresh_expires: u16,
-            refresh_expires_at: String,
-            account_id: String,
-            client_id: String,
-            internal_client: bool,
-            client_service: String,
-            scope: Vec<String>,
-            displayName: String,
-            app: String,
-            in_app_id: String,
-            product_id: String,
-            application_id: String,
-            acr: String,
-            auth_time: String
-        }
-
-        let url = "https://account-public-service-prod.ol.epicgames.com/account/api/oauth/token";
-        let mut req_body: String = String::from("grant_type=authorization_code&code=").trim().to_string();
-        req_body.push_str(authcode.trim());
-
-        let response = Client::post(&http_client, url)
-            .body(req_body)
-            .header("Content-Type", "application/x-www-form-urlencoded")
-            .header("Authorization",
-                    "Basic M2Y2OWU1NmM3NjQ5NDkyYzhjYzI5ZjFhZjA4YThhMTI6YjUxZWU5Y2IxMjIzNGY1MGE2OWVmYTY3ZWY1MzgxMmU=")
-            .send();
-
-        match response {
-            Ok(response_data) => {
-                match response_data.json::<ResponseStruct>().ok() {
-                    Some(response) => {
-                        self.access_token = response.access_token;
-                        self.account_id = response.account_id;
-                    },
-                    None => {
-                        error!("Failed to get access_token!");
-                    }
-                }
-            },
-            _ => { error!("Failed to get access token!"); },
+    /// Creates a new instance of PersistentCredentials with the given String parameters.
+    pub fn from(account_id: String, device_id: String, secret: String) -> PersistentCredentials {
+        PersistentCredentials {
+            account_id,
+            device_id,
+            secret,
         }
     }
 
-    pub fn get_device_auth_and_secret(&mut self, http_client: &Client) {
-
-        if self.access_token.is_empty() || self.account_id.is_empty() {
-            error!("Device access token cannot be empty!");
-            return;
+    /// Fetches the Persistent credentials
+    pub fn fetch(
+        http_client: &reqwest::blocking::Client,
+        authcode: &str,
+    ) -> Result<PersistentCredentials, Box<dyn Error>> {
+        if authcode.is_empty() {
+            Err(GameAuthenticationError::IllegalParameter(
+                "Authorization code cannot be empty".to_string(),
+            ))?
         }
 
-        let mut url : String = String::from("https://account-public-service-prod.ol.epicgames.com/account/api/public/account/");
-        url.push_str(self.account_id.as_str());
-        url.push_str("/deviceAuth");
+        // PersistentCredentials to be returned by this function.
+        let mut resulting_credentials = PersistentCredentials::new();
 
-        /*
-        let it : String = String::new;
-        it.starts_with("one thing");
-        // Just discovered String.starts_with() KEKW
-        */
+        // Getting access token and account id
+        info!("Getting Access Token");
+        let access_token: AccessToken = AccessToken::from_authcode(
+            http_client,
+            &authcode,
+            Some(&mut resulting_credentials),
+            ClientType::ANDROID,
+        )?;
 
-        #[derive(Debug, Deserialize)]
-        struct CreatedObject {
-            location: String,
-            ipAddress: String,
-            dateTime: String,
-        }
+        // Getting device_id and secret
+        {
+            let url = format!("https://account-public-service-prod.ol.epicgames.com/account/api/public/account/{}/deviceAuth", resulting_credentials.account_id);
 
-        #[derive(Debug, Deserialize)]
-        struct ResponseStruct {
-            deviceId: String,
-            accountId: String,
-            secret: String,
-            userAgent: String,
-            created: CreatedObject,
-        }
+            let mut headers = HeaderMap::new();
+            headers.insert(
+                "Authorization",
+                format!("Bearer {}", access_token.0).parse().unwrap(),
+            );
 
-        let mut bearer_header = String::from("Bearer ");
-        bearer_header.push_str(self.access_token.as_str());
+            #[derive(Debug, Deserialize)]
+            struct ResponseContent {
+                deviceId: String,
+                accountId: String,
+                secret: String,
+            }
 
-        let response = Client::post(&http_client, url)
-            .header("Authorization", bearer_header.as_str())
-            .send();
+            let response = http_client.post(&url).headers(headers).send()?;
 
-        match response {
-            Ok(response_data) => {
-                match response_data.json::<ResponseStruct>().ok() {
-                    Some(response_json) => {
-                        self.device_id = response_json.deviceId;
-                        self.secret = response_json.secret;
-                    }
-                    None => {
-                        error!("Failed to parse device_id!");
-                    },
+            match response.status() {
+                StatusCode::OK => {
+                    let response_content: ResponseContent = response.json::<ResponseContent>()?;
+                    resulting_credentials.device_id = response_content.deviceId;
+                    resulting_credentials.account_id = response_content.accountId;
+                    resulting_credentials.secret = response_content.secret;
+                    Ok(resulting_credentials)
                 }
-            },
-            _ => { error!("Failed to get device_id!"); },
+                StatusCode::INTERNAL_SERVER_ERROR => {
+                    error!("Internal Server Error when fetching device_id and secret with Access Token");
+                    Err(Box::new(GameAuthenticationError::RequestFailed))?
+                }
+                StatusCode::UNAUTHORIZED => {
+                    error!(
+                        "Unauthorized action when fetching device_id and secret with Access Token"
+                    );
+                    Err(Box::new(GameAuthenticationError::IllegalRequest(
+                        "Unauthorized action when fetching device_id and secret with Access Token"
+                            .to_string(),
+                    )))?
+                }
+                _ => {
+                    error!(
+                        "Unsupported response when fetching device_id and secret with Access Token"
+                    );
+                    error!("Got response {:?}", response.text().unwrap_or_default());
+                    Err(Box::new(GameAuthenticationError::IllegalResponse(
+                        "Unsupported response when fetching device_id and secret with Access Token"
+                            .to_string(),
+                    )))?
+                }
+            }
         }
     }
 }
 
 #[derive(Debug)]
-pub struct TemporaryCredentials {
-    access_token : String,
-    pub exchange_code : String,
-}
-
-impl TemporaryCredentials {
-    pub fn new() -> TemporaryCredentials {
-        TemporaryCredentials {
-            access_token : String::new(),
-            exchange_code : String::new(),
-        }
+pub struct ExchangeCode(pub String);
+impl ExchangeCode {
+    pub fn new() -> ExchangeCode {
+        ExchangeCode(String::new())
     }
-    pub fn get_access_token_from_device_auth(&mut self, http_client: &Client, device_credentials: &DeviceCredentials) /*Android*/ {
 
+    pub fn from_persistent_credentials(
+        http_client: &reqwest::blocking::Client,
+        access_token: &AccessToken,
+        client_type: ClientType,
+    ) -> Result<ExchangeCode, GameAuthenticationError> {
         #[derive(Debug, Deserialize)]
         struct ResponseStruct {
-            access_token: String,
-            expires_in: u16,
-            expires_at: String,
-            token_type: String,
-            refresh_token: String,
-            refresh_expires: u16,
-            refresh_expires_at: String,
-            account_id: String,
-            client_id: String,
-            internal_client: bool,
-            client_service: String,
-            displayName: String,
-            app: String,
-            in_app_id: String,
-            product_id: String,
-            application_id: String,
-            acr: String,
-            auth_time: String
-        }
-
-        let mut request_body = String::new();
-        {
-            // Grant type
-            request_body.push_str("grant_type=device_auth"
-                .trim());
-
-            // AccountID
-            request_body.push_str("&account_id=");
-            request_body.push_str(device_credentials.account_id
-                .as_str()
-                .trim());
-
-            // DeviceID
-            request_body.push_str("&device_id=");
-            request_body.push_str(device_credentials.device_id
-                .as_str()
-                .trim());
-
-            // Secret
-            request_body.push_str("&secret=");
-            request_body.push_str(device_credentials.secret
-                .as_str()
-                .trim());
-            
-            request_body = request_body.trim().to_string();
-        }
-
-        let url : &str = "https://account-public-service-prod.ol.epicgames.com/account/api/oauth/token";
-        
-        let response = Client::post(&http_client, url)
-            .body(request_body)
-            .header("Content-Type", "application/x-www-form-urlencoded")
-            .header("Authorization",
-                    "Basic M2Y2OWU1NmM3NjQ5NDkyYzhjYzI5ZjFhZjA4YThhMTI6YjUxZWU5Y2IxMjIzNGY1MGE2OWVmYTY3ZWY1MzgxMmU=")
-            .send();
-        
-        match response {
-            Ok(response_data) => {
-                match response_data.json::<ResponseStruct>().ok() {
-                    Some(response) => {
-                        self.access_token = response.access_token;
-                    },
-                    None => {
-                        error!("Failed to parse access_token!");
-                    }
-                }
-            },
-            _ => { error!("Failed to get access token!"); },
-        }
-    }
-    pub fn get_access_token_from_exchange_code(&mut self, http_client: &Client, temporary_credentials: &TemporaryCredentials) /*Generic*/ {
-        #[derive(Debug, Deserialize)]
-        struct ResponseStruct {
-            access_token: String,
-            /*expires_in: u16,
-            expires_at: String,
-            token_type: String,
-            refresh_token: String,
-            refresh_expires: u16,
-            refresh_expires_at: String,
-            account_id: String,
-            client_id: String,
-            internal_client: bool,
-            client_service: String,
-            displayName: String,
-            app: String,
-            in_app_id: String,
-            acr: String,
-            auth_time: String*/
-        }
-
-        let mut request_body = String::new();
-        request_body.push_str("grant_type=exchange_code&exchange_code=".trim());
-        request_body.push_str(temporary_credentials.exchange_code.as_str().trim());
-        
-        let url : &str = "https://account-public-service-prod.ol.epicgames.com/account/api/oauth/token";
-
-        let response = http_client.post(url)
-            .body(request_body)
-            .header("Content-Type", "application/x-www-form-urlencoded")
-            .header("Authorization",
-                    "Basic MzRhMDJjZjhmNDQxNGUyOWIxNTkyMTg3NmRhMzZmOWE6ZGFhZmJjY2M3Mzc3NDUwMzlkZmZlNTNkOTRmYzc2Y2Y=")
-            .send();
-
-        match response {
-            Ok(response_data) => {
-                match response_data.json::<ResponseStruct>().ok() {
-                    Some(response) => {
-                        self.access_token = response.access_token;
-                    },
-                    None => {
-                        error!("Failed to parse access_token!");
-                    }
-                }
-            },
-            _ => { error!("Failed to get access token!"); },
-        }
-        
-        
-    }
-    pub fn get_exchange_code(&mut self, http_client: &Client, client_id: &str) {
-
-        #[derive(Debug,Deserialize)]
-        struct ResponseStruct {
-            expiresInSeconds: u16,
             code: String,
-            creatingClientId: String,
         }
 
-        let mut bearer_header = String::from("Bearer ");
-        bearer_header.push_str(self.access_token.as_str());
-        
-        let mut query_content : String = String::from("?consumingClientId=").trim().to_string();
-        query_content.push_str(client_id.trim());
-        
-        let url: &str = "https://account-public-service-prod.ol.epicgames.com/account/api/oauth/exchange";
-        let response = Client::get(&http_client, url)
-            //.query(query_content.as_str())
-            .query(&[("consumingClientId",client_id.trim())])
-            .header("Authorization", bearer_header.as_str())
-            .send();
-        
-        match response {
-            Ok(response_data) => {            
-                match response_data.json::<ResponseStruct>().ok() {
-                    Some(response_json) => {
-                        self.exchange_code = response_json.code;
-                    }
-                    None => {
-                        error!("Failed to parse Exchange code!");
-                    },
-                }
+        let mut bearer = HeaderMap::new();
+        bearer.insert(
+            "Authorization",
+            HeaderValue::from_str(&format!("Bearer {}", access_token.0)).unwrap(),
+        );
+        let query_content = [(
+            "consumingClientId",
+            match client_type {
+                ClientType::ANDROID => "34a02cf8f4414e29b15921876da36f9a",
+                ClientType::PC | ClientType::GENERIC => "ec684b8c687f479fadea3cb2ad83f5c6",
             },
-            _ => { error!("Failed to get Exchange code!"); },
+        )];
+        let url = "https://account-public-service-prod.ol.epicgames.com/account/api/oauth/exchange";
+
+        let response = http_client
+            .get(url)
+            .query(&query_content)
+            .headers(bearer)
+            .send();
+
+        match response {
+            Ok(response_data) => match response_data.json::<ResponseStruct>() {
+                Ok(response_json) => {
+                    return Ok(ExchangeCode(response_json.code));
+                }
+                _ => Err(GameAuthenticationError::IllegalResponse(
+                    "Could not parse exchange code".to_string(),
+                ))?,
+            },
+            _ => Err(GameAuthenticationError::RequestFailed)?,
         }
     }
 }

src/main.rs

@@ -1,11 +1,10 @@
 mod auth;
 
-use std::process::exit;
-use log::*;
 use colog;
+use log::*;
 use std::env::args;
 use std::io::Write;
-use std::process::Command;
+use std::process::{exit, Command};
 
 use crate::auth::*;
 
@@ -13,7 +12,7 @@ fn main() {
     /* Initial initializations */
     {
         colog::init();
-        // TODO: Set log level to display nothing
+        // TODO: Set log level to display nothing by default
     }
 
     /* Command line arg fetching and handling */
@@ -22,8 +21,7 @@ fn main() {
         /* Help page */
         if command_line_arguments.iter().any(|a| a == "--help") {
             // TODO: Complete help message
-            let help_page : &str =
-"
+            let help_page: &str = "
 === godo-launcher help page===\n
 `--verbose`, `-v`, `-vv`\t| Enables debug logging.
 `--debug`, `-d`\t\t\t| Enables verbose logging.
@@ -31,11 +29,14 @@ fn main() {
 ";
 
             println!("{help_page}");
-            std::process::exit(0);
+            exit(0);
         }
 
         /* LogLevel modifiers */
-        if command_line_arguments.iter().any(|a| a == "--verbose" || a == "-v" || a == "-vv") {
+        if command_line_arguments
+            .iter()
+            .any(|a| a == "--verbose" || a == "-v" || a == "-vv")
+        {
             // TODO: Change Log Level to info and warn
         }
 
@@ -43,56 +44,87 @@ fn main() {
             warn!("Debug info enabled!");
             // TODO: Change Log Level to debug
         }
-
     }
 
     /* Authentication Process */
 
+    //1. get access token 1 from authcode
+    //2. get persistent credentials from access token 1
+    //3. get access token 2 from persistent credentials
+    //4. get android exchange code from access token and persistent credentials
+
     let http_client_builder = reqwest::blocking::ClientBuilder::new()
         .https_only(true)
-        .user_agent(concat!(env!("CARGO_PKG_NAME"), "/", env!("CARGO_PKG_VERSION"),));
+        .user_agent(concat!(
+            env!("CARGO_PKG_NAME"),
+            "/",
+            env!("CARGO_PKG_VERSION"),
+        ));
 
-    let http_client = http_client_builder.build()
+    let http_client = http_client_builder
+        .build()
         .unwrap_or(reqwest::blocking::Client::new());
 
     // Authentication code from user input
-    print!("Insert AuthCode > ");
+    info!("Insert Authentication Code: ");
     std::io::stdout().flush().unwrap();
-    
+
     // Getting temporal info to create persistent login info
     let mut auth_code: String = "".to_string();
     let _ = std::io::stdin().read_line(&mut auth_code).unwrap();
-    
-    let mut persistent_credentials: DeviceCredentials = DeviceCredentials::new();
-    persistent_credentials.get_access_token_and_account_id(&http_client, &auth_code);
-    persistent_credentials.get_device_auth_and_secret(&http_client);
-    dbg!(&persistent_credentials);
 
-    /* Android temporary credentials */
-    let mut android_credentials: TemporaryCredentials = TemporaryCredentials::new();
-    android_credentials.get_access_token_from_device_auth(&http_client, &persistent_credentials);
-    android_credentials.get_exchange_code(&http_client, "34a02cf8f4414e29b15921876da36f9a");
-    dbg!(&android_credentials);
+    info!("Generating persistent credentials");
+    let persistent_credentials = PersistentCredentials::fetch(&http_client, &auth_code).unwrap();
+    info!("New persistent credentials: {:#?}", &persistent_credentials);
 
-    /* Generic temporary credentials */
-    let mut generic_credentials : TemporaryCredentials = TemporaryCredentials::new();
-    generic_credentials.get_access_token_from_exchange_code(&http_client, &android_credentials);
-    generic_credentials.get_exchange_code(&http_client, "ec684b8c687f479fadea3cb2ad83f5c6");
-    dbg!(&generic_credentials);
+    // Generating Android access token and exchange code from persistent_credentials
+
+    info!("Generating Android exchange code from persistent credentials");
+    let android_token = AccessToken::from_persistent_credentials(
+        &http_client,
+        &persistent_credentials,
+        ClientType::ANDROID,
+    )
+    .unwrap();
+    info!("Android Access Token: {:#?}", &android_token);
+
+    let android_exchange_code = ExchangeCode::from_persistent_credentials(
+        &http_client,
+        &android_token,
+        ClientType::ANDROID,
+    )
+    .unwrap();
+    info!("Android Exchange Code: {:#?}", &android_exchange_code);
+
+    // Generating generic access_token and exchange code from android exchange code
+
+    info!("Generating generic access token");
+    let generic_access_token =
+        AccessToken::from_exchange_code(&http_client, &android_exchange_code).unwrap();
+    info!("Generic Access Token: {:#?}", &generic_access_token);
+
+    info!("Generating generic exchange code");
+    let generic_exchange_code = ExchangeCode::from_persistent_credentials(
+        &http_client,
+        &generic_access_token,
+        ClientType::GENERIC,
+    )
+    .unwrap();
+    info!("Generated exchange code: {:#?}", &generic_exchange_code);
 
     /* Game Launching*/
-
+    info!("Starting game...");
     let mut auth_password_argument = String::from("-AUTH_PASSWORD=");
-    auth_password_argument.push_str(generic_credentials.exchange_code.as_str());
+    auth_password_argument.push_str(generic_exchange_code.0.as_str());
 
     let mut uid_argument = String::from("-epicuserid=");
     uid_argument.push_str(persistent_credentials.account_id.as_str());
 
     let command = Command::new("cmd")
-        .arg("/C")  // '/C' executes the command and terminates the command shell
+        .arg("/C") // '/C' executes the command and terminates the command shell
         .arg("start")
         .arg("/d")
-        .arg("D:\\Games\\Epic Games\\Fortnite\\FortniteGame\\Binaries\\Win64")  // Path to the directory
+        .arg("D:\\Games\\Epic Games\\Fortnite\\FortniteGame\\Binaries\\Win64") // Path to the directory
         .arg("FortniteLauncher.exe") // The executable
         .arg("-AUTH_LOGIN=unused")
         .arg(&auth_password_argument)
@@ -104,32 +136,15 @@ fn main() {
         .arg(&uid_argument)
         .arg("-epicsandboxid=fn")
         .spawn();
-    
-    /*
-    "D:\Games\Epic Games\Fortnite\FortniteGame\Binaries\Win64/FortniteClient-Win64-Shipping_EAC_EOS.exe"
-    -obfuscationid=N8Kw52kUZsQq50886Eit-gzJOBar1g
-    -AUTH_LOGIN=unused -AUTH_PASSWORD=91ec3f72c2d94c8598082d58fc007a02
-    -AUTH_TYPE=exchangecode
-    -epicapp=Fortnite
-    -epicenv=Prod
-    -EpicPortal
-    -epicusername=Generic_Boi69
-    -epicuserid=bff1ee7d635140ed945f69a0595526b2
-    -epiclocale=en
-    -epicsandboxid=fn
-    -named_pipe=bff1ee7d635140ed945f69a0595526b2\Fortnite
-    -fromfl=eaceos
-    -caldera=eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCJ9.eyJhY2NvdW50X2lkIjoiYmZmMWVlN2Q2MzUxNDBlZDk0NWY2OWEwNTk1NTI2YjIiLCJnZW5lcmF0ZWQiOjE3MzQ1NDMwNDYsImNhbGRlcmFHdWlkIjoiOTUyZmU2OTktZjJjMy00YjZlLTk2NzctOWRlMDMyOTcyZjkxIiwiYWNQcm92aWRlciI6IkVhc3lBbnRpQ2hlYXRFT1MiLCJub3RlcyI6IiIsInByZSI6dHJ1ZSwicGFlIjpmYWxzZSwiZmFsbGJhY2siOmZhbHNlfQ.SaiRyK-FFbzCI3TVM8RRFS0UyCu5VUsTlIMeNKPZHYcKUORdE7fZJlo0DC4zoZsPfmLNEzZxCLb_sJVPiy-m7A
-    */
-    
+
     match command {
         Ok(mut child) => {
             // Optionally, you can wait for the process to complete
             let status = child.wait().expect("Failed to wait on child");
-            println!("Command executed with status: {}", status);
+            info!("Command executed with status: {}", status);
         }
         Err(e) => {
-            eprintln!("Error executing command: {}", e);
+            error!("Error executing command: {}", e);
             exit(1);
         }
     }