Use a type alias instead of a generic in Request

src/core/network/mod.rs

@@ -20,7 +20,7 @@ pub enum RequestError {
 
 pub type ResponseResult<T> = Result<T, RequestError>;
 
-pub async fn request<T: DeserializeOwned, R: Request<T>>(
+pub async fn request<T: DeserializeOwned, R: Request<ReturnValue = T>>(
     client: &Client,
     request: R,
 ) -> ResponseResult<T> {

src/core/requests/get_me.rs

@@ -8,7 +8,9 @@ pub struct GetMe {
     token: String,
 }
 
-impl Request<User> for GetMe {
+impl Request for GetMe {
+    type ReturnValue = User;
+
     fn name(&self) -> &str {
         "getMe"
     }

src/core/requests/mod.rs

@@ -1,8 +1,11 @@
 use reqwest::r#async::multipart::Form;
+use serde::de::DeserializeOwned;
 
 /// Request that can be sended to telegram.
-/// `R` - return type.
-pub trait Request<R: serde::de::DeserializeOwned> {
+/// `ReturnValue` - a type that will be returned from Telegram.
+pub trait Request {
+    type ReturnValue: DeserializeOwned;
+
     /// Get name of the request (e.g. "getMe" or "sendMessage")
     fn name(&self) -> &str;
 

src/core/requests/send_message.rs

@@ -21,7 +21,9 @@ pub struct SendMessage {
     reply_markup: Option<()>, // TODO: ReplyMarkup enum
 }
 
-impl Request<Message> for SendMessage {
+impl Request for SendMessage {
+    type ReturnValue = Message;
+
     fn name(&self) -> &str {
         "getMe"
     }