From 49e5461ef75d6c65cb32ef94344149f18eeb0974 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Damir=20Jeli=C4=87?= <poljar@termina.org.uk>
Date: Thu, 30 Nov 2023 13:17:30 +0100
Subject: [PATCH] Add a method to check if we have a room key stored locally

---
 crates/matrix-sdk-crypto/src/machine.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/crates/matrix-sdk-crypto/src/machine.rs b/crates/matrix-sdk-crypto/src/machine.rs
index 3bb063374..96a70f8a9 100644
--- a/crates/matrix-sdk-crypto/src/machine.rs
+++ b/crates/matrix-sdk-crypto/src/machine.rs
@@ -1535,6 +1535,16 @@ impl OlmMachine {
         result
     }
 
+    /// Do we have the room key for the given room and with the given session id
+    /// in the store?
+    pub async fn is_room_key_available(
+        &self,
+        room_id: &RoomId,
+        session_id: &str,
+    ) -> Result<bool, CryptoStoreError> {
+        Ok(self.store().get_inbound_group_session(room_id, session_id).await?.is_some())
+    }
+
     /// Get encryption info for a decrypted timeline event.
     ///
     /// This recalculates the [`EncryptionInfo`] data that is returned by