In purple, timestamp unit is seconds, not milliseconds.

src/rust/src/core.rs

@@ -149,7 +149,7 @@ async fn run<C: presage::store::Store + 'static>(
             let mut manager = manager.expect("manager must be loaded");
             // prepare a PurplePresage message for providing feed-back (send success or error)
             let mut msg = crate::bridge::Presage::from_account(account);
-            msg.timestamp = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap().as_millis() as u64;
+            msg.timestamp = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap().as_secs() as u64;
             match recipient {
                 crate::structs::Recipient::Contact(uuid) => {
                     msg.who = std::ffi::CString::new(uuid.to_string()).unwrap().into_raw();