Impl From<UserId> for ChatId and Recipient

src/types/chat_id.rs

@@ -12,6 +12,12 @@ use crate::types::UserId;
 #[serde(transparent)]
 pub struct ChatId(pub i64);
 
+impl From<UserId> for ChatId {
+    fn from(UserId(id): UserId) -> Self {
+        Self(id as _)
+    }
+}
+
 impl ChatId {
     pub(crate) fn is_channel(self) -> bool {
         matches!(self.unmark(), UnmarkedChatId::Channel(_))

src/types/recipient.rs

@@ -1,7 +1,7 @@
 use derive_more::{Display, From};
 use serde::{Deserialize, Serialize};
 
-use crate::types::ChatId;
+use crate::types::{ChatId, UserId};
 
 /// A unique identifier for the target chat or username of the target channel
 /// (in the format `@channelusername`).
@@ -29,6 +29,12 @@ impl Recipient {
     }
 }
 
+impl From<UserId> for Recipient {
+    fn from(id: UserId) -> Self {
+        Self::Id(id.into())
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;