refactor: Use self_fingerprint() where it makes sense

src/securejoin.rs

@@ -142,7 +142,7 @@ pub async fn get_securejoin_qr(context: &Context, chat: Option<ChatId>) -> Resul
     let auth = create_id();
     token::save(context, Namespace::Auth, grpid, &auth, time()).await?;
 
-    let fingerprint = get_self_fingerprint(context).await?.hex();
+    let fingerprint = self_fingerprint(context).await?;
 
     let self_addr = context.get_primary_self_addr().await?;
     let self_addr_urlencoded = utf8_percent_encode(&self_addr, DISALLOWED_CHARACTERS).to_string();

src/tests/verified_chats.rs

@@ -152,11 +152,7 @@ async fn test_missing_key_reexecute_securejoin() -> Result<()> {
     bob.sql
         .execute(
             "DELETE FROM public_keys WHERE fingerprint=?",
-            (&load_self_public_key(alice)
-                .await
-                .unwrap()
-                .dc_fingerprint()
-                .hex(),),
+            (&self_fingerprint(alice).await.unwrap(),),
         )
         .await?;
     let chat = Chat::load_from_db(bob, chat_id).await?;