fix: do not panic on a JSON not containing the PDU

Do not panic on a JSON not containing the PDU when executing the parse-pdu admin command.

src/database/admin.rs

@@ -354,13 +354,9 @@ fn process_admin_command(
                 let string = body[1..body.len() - 1].join("\n");
                 match serde_json::from_str(&string) {
                     Ok(value) => {
-                        let event_id = EventId::parse(format!(
+                        match ruma::signatures::reference_hash(&value, &RoomVersionId::V6) {
-                            "${}",
+                            Ok(hash) => {
-                            // Anything higher than version3 behaves the same
+                                let event_id = EventId::parse(format!("${}", hash));
-                            ruma::signatures::reference_hash(&value, &RoomVersionId::V6)
-                                .expect("ruma can calculate reference hashes")
-                        ))
-                        .expect("ruma's reference hashes are valid event ids");
 
                                 match serde_json::from_value::<PduEvent>(
                                     serde_json::to_value(value).expect("value is json"),
@@ -375,6 +371,12 @@ fn process_admin_command(
                                     )),
                                 }
                             }
+                            Err(e) => RoomMessageEventContent::text_plain(format!(
+                                "Could not parse PDU JSON: {:?}",
+                                e
+                            )),
+                        }
+                    }
                     Err(e) => RoomMessageEventContent::text_plain(format!(
                         "Invalid json in command body: {}",
                         e