1 files changed, 16 insertions, 0 deletions
diff --git a/src/CacheCryptoStructs.h b/src/CacheCryptoStructs.h
index 9f2cfe54..eb2cc445 100644
--- a/src/CacheCryptoStructs.h
+++ b/src/CacheCryptoStructs.h
@@ -6,12 +6,28 @@
 #include <mtx/responses/crypto.hpp>
 #include <mtxclient/crypto/objects.hpp>
 
+struct DeviceAndMasterKeys
+{
+        // map from device id or master key id to message_index
+        std::map<std::string, uint64_t> devices, master_keys;
+};
+
+struct SharedWithUsers
+{
+        // userid to keys
+        std::map<std::string, DeviceAndMasterKeys> keys;
+};
+
 // Extra information associated with an outbound megolm session.
 struct OutboundGroupSessionData
 {
         std::string session_id;
         std::string session_key;
         uint64_t message_index = 0;
+
+        // who has access to this session.
+        // Rotate, when a user leaves the room and share, when a user gets added.
+        SharedWithUsers initially, currently;
 };
 
 void