get_private_messages function for Chat history

src/functions/messages.rs

@@ -1,8 +1,14 @@
 use anyhow::Result;
 use nostr_sdk::prelude::*;
-use crate::nips::nip17;
+// Importiere das Message Struct aus nip17!
+use crate::nips::nip17::{self, Message};
 
 pub async fn send_private_message(client: &Client, receiver_pubkey: &str, message: &str) -> Result<EventId> {
     let receiver = PublicKey::parse(receiver_pubkey)?;
     nip17::send_dm(client, receiver, message).await
+}
+
+// Rückgabetyp ist Vec<Message>
+pub async fn get_private_messages(client: &Client, contact_npub: &str) -> Result<Vec<Message>> {
+    nip17::get_dm_messages(client, contact_npub).await
 }