server notified of client profile updates

src-common/src/lib.rs

@@ -13,6 +13,7 @@ pub struct Profile {
 #[serde(tag = "type", rename_all = "camelCase")]
 pub enum ClientMessage {
     Register { profile: Profile, signature: String },
+    ProfileUpdated { profile: Profile, signature: String },
     Signed { payload: String, signature: String },
 }
 
@@ -34,3 +35,11 @@ pub fn register_bytes(challenge: &str, profile: &Profile) -> Vec<u8> {
 pub fn message_bytes(payload: &str) -> Vec<u8> {
     format!("wyd-message-v{VERSION}\n{payload}").into_bytes()
 }
+
+pub fn profile_bytes(profile: &Profile) -> Vec<u8> {
+    format!(
+        "wyd-profile-v{VERSION}\n{}\n{}",
+        profile.id, profile.display_name
+    )
+    .into_bytes()
+}