diff --git a/matrix_sdk/src/client.rs b/matrix_sdk/src/client.rs
index e5c6b408..652b8410 100644
--- a/matrix_sdk/src/client.rs
+++ b/matrix_sdk/src/client.rs
@@ -2064,6 +2064,10 @@ impl Client {
     /// * `passphrase` - The passphrase that should be used to decrypt the
     /// exported room keys.
     ///
+    /// Returns a tuple of numbers that represent the number of sessions that
+    /// were imported and the total number of sessions that were found in the
+    /// key export.
+    ///
     /// # Panics
     ///
     /// This method will panic if it isn't run on a Tokio runtime.
@@ -2093,7 +2097,7 @@ impl Client {
         feature = "docs",
         doc(cfg(all(encryption, not(target_arch = "wasm32"))))
     )]
-    pub async fn import_keys(&self, path: PathBuf, passphrase: &str) -> Result<usize> {
+    pub async fn import_keys(&self, path: PathBuf, passphrase: &str) -> Result<(usize, usize)> {
         let olm = self
             .base_client
             .olm_machine()
diff --git a/matrix_sdk_common/Cargo.toml b/matrix_sdk_common/Cargo.toml
index d348a0d1..65f336d5 100644
--- a/matrix_sdk_common/Cargo.toml
+++ b/matrix_sdk_common/Cargo.toml
@@ -20,7 +20,7 @@ js_int = "0.1.9"
 
 [dependencies.ruma]
 version = "0.0.1"
-git = "https://github.com/ruma/ruma"
+path = "/home/poljar/werk/priv/ruma/ruma"
 rev = "48d1c9747561686e1c5627405780f6de01ee17b1"
 features = ["client-api", "unstable-pre-spec"]
 
diff --git a/matrix_sdk_common/src/lib.rs b/matrix_sdk_common/src/lib.rs
index 6e718e68..92002cfc 100644
--- a/matrix_sdk_common/src/lib.rs
+++ b/matrix_sdk_common/src/lib.rs
@@ -7,7 +7,9 @@ pub use ruma::{
         error::{FromHttpRequestError, FromHttpResponseError, IntoHttpError, ServerError},
         AuthScheme, EndpointError, OutgoingRequest,
     },
-    directory, encryption, events, identifiers, presence, push, thirdparty, Outgoing, Raw,
+    directory, encryption, events, identifiers, presence, push,
+    serde::Raw,
+    thirdparty, Outgoing,
 };
 
 pub use uuid;
diff --git a/matrix_sdk_crypto/src/file_encryption/key_export.rs b/matrix_sdk_crypto/src/file_encryption/key_export.rs
index f41d5825..b881ec64 100644
--- a/matrix_sdk_crypto/src/file_encryption/key_export.rs
+++ b/matrix_sdk_crypto/src/file_encryption/key_export.rs
@@ -314,7 +314,7 @@ mod test {
         let decrypted = decrypt_key_export(Cursor::new(encrypted), "1234").unwrap();
 
         assert_eq!(export, decrypted);
-        assert_eq!(machine.import_keys(decrypted).await.unwrap(), 0);
+        assert_eq!(machine.import_keys(decrypted).await.unwrap(), (0, 1));
     }
 
     #[test]
diff --git a/matrix_sdk_crypto/src/identities/device.rs b/matrix_sdk_crypto/src/identities/device.rs
index 4dc44298..69e766c1 100644
--- a/matrix_sdk_crypto/src/identities/device.rs
+++ b/matrix_sdk_crypto/src/identities/device.rs
@@ -27,8 +27,8 @@ use matrix_sdk_common::{
     api::r0::keys::SignedKey,
     encryption::DeviceKeys,
     events::{
-        forwarded_room_key::ForwardedRoomKeyEventContent, room::encrypted::EncryptedEventContent,
-        EventType,
+        forwarded_room_key::ForwardedRoomKeyToDeviceEventContent,
+        room::encrypted::EncryptedEventContent, EventType,
     },
     identifiers::{
         DeviceId, DeviceIdBox, DeviceKeyAlgorithm, DeviceKeyId, EventEncryptionAlgorithm, UserId,
@@ -158,7 +158,7 @@ impl Device {
     ) -> OlmResult<(Session, EncryptedEventContent)> {
         let export = session.export().await;
 
-        let content: ForwardedRoomKeyEventContent = if let Ok(c) = export.try_into() {
+        let content: ForwardedRoomKeyToDeviceEventContent = if let Ok(c) = export.try_into() {
             c
         } else {
             // TODO remove this panic.
diff --git a/matrix_sdk_crypto/src/key_request.rs b/matrix_sdk_crypto/src/key_request.rs
index 32cbd69f..8ef787f4 100644
--- a/matrix_sdk_crypto/src/key_request.rs
+++ b/matrix_sdk_crypto/src/key_request.rs
@@ -30,8 +30,8 @@ use tracing::{error, info, trace, warn};
 use matrix_sdk_common::{
     api::r0::to_device::DeviceIdOrAllDevices,
     events::{
-        forwarded_room_key::ForwardedRoomKeyEventContent,
-        room_key_request::{Action, RequestedKeyInfo, RoomKeyRequestEventContent},
+        forwarded_room_key::ForwardedRoomKeyToDeviceEventContent,
+        room_key_request::{Action, RequestedKeyInfo, RoomKeyRequestToDeviceEventContent},
         AnyToDeviceEvent, EventType, ToDeviceEvent,
     },
     identifiers::{DeviceId, DeviceIdBox, EventEncryptionAlgorithm, RoomId, UserId},
@@ -67,8 +67,9 @@ pub enum KeyshareDecision {
 /// device that requested the key doesn't share an Olm session with us.
 #[derive(Debug, Clone)]
 struct WaitQueue {
-    requests_waiting_for_session:
-        Arc<DashMap<(UserId, DeviceIdBox, String), ToDeviceEvent<RoomKeyRequestEventContent>>>,
+    requests_waiting_for_session: Arc<
+        DashMap<(UserId, DeviceIdBox, String), ToDeviceEvent<RoomKeyRequestToDeviceEventContent>>,
+    >,
     requests_ids_waiting: Arc<DashMap<(UserId, DeviceIdBox), DashSet<String>>>,
 }
 
@@ -85,7 +86,7 @@ impl WaitQueue {
         self.requests_ids_waiting.is_empty() && self.requests_waiting_for_session.is_empty()
     }
 
-    fn insert(&self, device: &Device, event: &ToDeviceEvent<RoomKeyRequestEventContent>) {
+    fn insert(&self, device: &Device, event: &ToDeviceEvent<RoomKeyRequestToDeviceEventContent>) {
         let key = (
             device.user_id().to_owned(),
             device.device_id().into(),
@@ -106,7 +107,7 @@ impl WaitQueue {
         device_id: &DeviceId,
     ) -> Vec<(
         (UserId, DeviceIdBox, String),
-        ToDeviceEvent<RoomKeyRequestEventContent>,
+        ToDeviceEvent<RoomKeyRequestToDeviceEventContent>,
     )> {
         self.requests_ids_waiting
             .remove(&(user_id.to_owned(), device_id.into()))
@@ -130,8 +131,9 @@ pub(crate) struct KeyRequestMachine {
     store: Store,
     outbound_group_sessions: Arc<DashMap<RoomId, OutboundGroupSession>>,
     outgoing_to_device_requests: Arc<DashMap<Uuid, OutgoingRequest>>,
-    incoming_key_requests:
-        Arc<DashMap<(UserId, DeviceIdBox, String), ToDeviceEvent<RoomKeyRequestEventContent>>>,
+    incoming_key_requests: Arc<
+        DashMap<(UserId, DeviceIdBox, String), ToDeviceEvent<RoomKeyRequestToDeviceEventContent>>,
+    >,
     wait_queue: WaitQueue,
     users_for_key_claim: Arc<DashMap<UserId, DashSet<DeviceIdBox>>>,
 }
@@ -156,7 +158,7 @@ impl Encode for RequestedKeyInfo {
     }
 }
 
-impl Encode for ForwardedRoomKeyEventContent {
+impl Encode for ForwardedRoomKeyToDeviceEventContent {
     fn encode(&self) -> String {
         format!(
             "{}|{}|{}|{}",
@@ -168,7 +170,7 @@ impl Encode for ForwardedRoomKeyEventContent {
 fn wrap_key_request_content(
     recipient: UserId,
     id: Uuid,
-    content: &RoomKeyRequestEventContent,
+    content: &RoomKeyRequestToDeviceEventContent,
 ) -> Result<OutgoingRequest, serde_json::Error> {
     let mut messages = BTreeMap::new();
 
@@ -224,7 +226,10 @@ impl KeyRequestMachine {
     }
 
     /// Receive a room key request event.
-    pub fn receive_incoming_key_request(&self, event: &ToDeviceEvent<RoomKeyRequestEventContent>) {
+    pub fn receive_incoming_key_request(
+        &self,
+        event: &ToDeviceEvent<RoomKeyRequestToDeviceEventContent>,
+    ) {
         let sender = event.sender.clone();
         let device_id = event.content.requesting_device_id.clone();
         let request_id = event.content.request_id.clone();
@@ -255,7 +260,7 @@ impl KeyRequestMachine {
     fn handle_key_share_without_session(
         &self,
         device: Device,
-        event: &ToDeviceEvent<RoomKeyRequestEventContent>,
+        event: &ToDeviceEvent<RoomKeyRequestToDeviceEventContent>,
     ) {
         self.users_for_key_claim
             .entry(device.user_id().to_owned())
@@ -295,7 +300,7 @@ impl KeyRequestMachine {
     /// Handle a single incoming key request.
     async fn handle_key_request(
         &self,
-        event: &ToDeviceEvent<RoomKeyRequestEventContent>,
+        event: &ToDeviceEvent<RoomKeyRequestToDeviceEventContent>,
     ) -> OlmResult<Option<Session>> {
         let key_info = match &event.content.action {
             Action::Request => {
@@ -505,7 +510,7 @@ impl KeyRequestMachine {
 
         let id = Uuid::new_v4();
 
-        let content = RoomKeyRequestEventContent {
+        let content = RoomKeyRequestToDeviceEventContent {
             action: Action::Request,
             request_id: id.to_string(),
             requesting_device_id: (&*self.device_id).clone(),
@@ -546,7 +551,7 @@ impl KeyRequestMachine {
     /// Get an outgoing key info that matches the forwarded room key content.
     async fn get_key_info(
         &self,
-        content: &ForwardedRoomKeyEventContent,
+        content: &ForwardedRoomKeyToDeviceEventContent,
     ) -> Result<Option<OugoingKeyInfo>, CryptoStoreError> {
         let id: Option<Uuid> = self.store.get_object(&content.encode()).await?;
 
@@ -597,7 +602,7 @@ impl KeyRequestMachine {
         // can delete it in one transaction.
         self.delete_key_info(&key_info).await?;
 
-        let content = RoomKeyRequestEventContent {
+        let content = RoomKeyRequestToDeviceEventContent {
             action: Action::CancelRequest,
             request_id: key_info.request_id.to_string(),
             requesting_device_id: (&*self.device_id).clone(),
@@ -617,7 +622,7 @@ impl KeyRequestMachine {
     pub async fn receive_forwarded_room_key(
         &self,
         sender_key: &str,
-        event: &mut ToDeviceEvent<ForwardedRoomKeyEventContent>,
+        event: &mut ToDeviceEvent<ForwardedRoomKeyToDeviceEventContent>,
     ) -> Result<(Option<Raw<AnyToDeviceEvent>>, Option<InboundGroupSession>), CryptoStoreError>
     {
         let key_info = self.get_key_info(&event.content).await?;
@@ -637,8 +642,8 @@ impl KeyRequestMachine {
             // If we have a previous session, check if we have a better version
             // and store the new one if so.
             let session = if let Some(old_session) = old_session {
-                let first_old_index = old_session.first_known_index().await;
-                let first_index = session.first_known_index().await;
+                let first_old_index = old_session.first_known_index();
+                let first_index = session.first_known_index();
 
                 if first_old_index > first_index {
                     self.mark_as_done(info).await?;
@@ -672,9 +677,9 @@ mod test {
     use matrix_sdk_common::{
         api::r0::to_device::DeviceIdOrAllDevices,
         events::{
-            forwarded_room_key::ForwardedRoomKeyEventContent,
-            room::encrypted::EncryptedEventContent, room_key_request::RoomKeyRequestEventContent,
-            AnyToDeviceEvent, ToDeviceEvent,
+            forwarded_room_key::ForwardedRoomKeyToDeviceEventContent,
+            room::encrypted::EncryptedEventContent,
+            room_key_request::RoomKeyRequestToDeviceEventContent, AnyToDeviceEvent, ToDeviceEvent,
         },
         identifiers::{room_id, user_id, DeviceIdBox, RoomId, UserId},
         locks::Mutex,
@@ -829,7 +834,7 @@ mod test {
 
         let export = session.export_at_index(10).await.unwrap();
 
-        let content: ForwardedRoomKeyEventContent = export.try_into().unwrap();
+        let content: ForwardedRoomKeyToDeviceEventContent = export.try_into().unwrap();
 
         let mut event = ToDeviceEvent {
             sender: alice_id(),
@@ -855,7 +860,7 @@ mod test {
             .unwrap();
         let first_session = first_session.unwrap();
 
-        assert_eq!(first_session.first_known_index().await, 10);
+        assert_eq!(first_session.first_known_index(), 10);
 
         machine
             .store
@@ -886,7 +891,7 @@ mod test {
 
         let export = session.export_at_index(15).await.unwrap();
 
-        let content: ForwardedRoomKeyEventContent = export.try_into().unwrap();
+        let content: ForwardedRoomKeyToDeviceEventContent = export.try_into().unwrap();
 
         let mut event = ToDeviceEvent {
             sender: alice_id(),
@@ -902,7 +907,7 @@ mod test {
 
         let export = session.export_at_index(0).await.unwrap();
 
-        let content: ForwardedRoomKeyEventContent = export.try_into().unwrap();
+        let content: ForwardedRoomKeyToDeviceEventContent = export.try_into().unwrap();
 
         let mut event = ToDeviceEvent {
             sender: alice_id(),
@@ -914,7 +919,7 @@ mod test {
             .await
             .unwrap();
 
-        assert_eq!(second_session.unwrap().first_known_index().await, 0);
+        assert_eq!(second_session.unwrap().first_known_index(), 0);
     }
 
     #[async_test]
@@ -1073,7 +1078,8 @@ mod test {
             .unwrap()
             .get(&DeviceIdOrAllDevices::AllDevices)
             .unwrap();
-        let content: RoomKeyRequestEventContent = serde_json::from_str(content.get()).unwrap();
+        let content: RoomKeyRequestToDeviceEventContent =
+            serde_json::from_str(content.get()).unwrap();
 
         drop(request);
         alice_machine
@@ -1241,7 +1247,8 @@ mod test {
             .unwrap()
             .get(&DeviceIdOrAllDevices::AllDevices)
             .unwrap();
-        let content: RoomKeyRequestEventContent = serde_json::from_str(content.get()).unwrap();
+        let content: RoomKeyRequestToDeviceEventContent =
+            serde_json::from_str(content.get()).unwrap();
 
         drop(request);
         alice_machine
diff --git a/matrix_sdk_crypto/src/machine.rs b/matrix_sdk_crypto/src/machine.rs
index 9252e678..2cdab741 100644
--- a/matrix_sdk_crypto/src/machine.rs
+++ b/matrix_sdk_crypto/src/machine.rs
@@ -1012,7 +1012,9 @@ impl OlmMachine {
     /// imported into our store. If we already have a better version of a key
     /// the key will *not* be imported.
     ///
-    /// Returns the number of sessions that were imported to the store.
+    /// Returns a tuple of numbers that represent the number of sessions that
+    /// were imported and the total number of sessions that were found in the
+    /// key export.
     ///
     /// # Examples
     /// ```no_run
@@ -1028,32 +1030,47 @@ impl OlmMachine {
     /// machine.import_keys(exported_keys).await.unwrap();
     /// # });
     /// ```
-    pub async fn import_keys(&self, mut exported_keys: Vec<ExportedRoomKey>) -> StoreResult<usize> {
+    pub async fn import_keys(
+        &self,
+        exported_keys: Vec<ExportedRoomKey>,
+    ) -> StoreResult<(usize, usize)> {
+        struct ShallowSessions {
+            inner: BTreeMap<Arc<RoomId>, u32>,
+        }
+
+        impl ShallowSessions {
+            fn has_better_session(&self, session: &InboundGroupSession) -> bool {
+                self.inner
+                    .get(&session.room_id)
+                    .map(|existing| existing <= &session.first_known_index())
+                    .unwrap_or(false)
+            }
+        }
+
         let mut sessions = Vec::new();
 
-        for key in exported_keys.drain(..) {
+        let existing_sessions = ShallowSessions {
+            inner: self
+                .store
+                .get_inbound_group_sessions()
+                .await?
+                .into_iter()
+                .map(|s| {
+                    let index = s.first_known_index();
+                    (s.room_id, index)
+                })
+                .collect(),
+        };
+
+        let total_sessions = exported_keys.len();
+
+        for key in exported_keys.into_iter() {
             let session = InboundGroupSession::from_export(key)?;
 
             // Only import the session if we didn't have this session or if it's
             // a better version of the same session, that is the first known
             // index is lower.
-            // TODO load all sessions so we don't do a thousand small loads.
-            if let Some(existing_session) = self
-                .store
-                .get_inbound_group_session(
-                    &session.room_id,
-                    &session.sender_key,
-                    session.session_id(),
-                )
-                .await?
-            {
-                let first_index = session.first_known_index().await;
-                let existing_index = existing_session.first_known_index().await;
-
-                if first_index < existing_index {
-                    sessions.push(session)
-                }
-            } else {
+            if !existing_sessions.has_better_session(&session) {
                 sessions.push(session)
             }
         }
@@ -1072,7 +1089,7 @@ impl OlmMachine {
             num_sessions
         );
 
-        Ok(num_sessions)
+        Ok((num_sessions, total_sessions))
     }
 
     /// Export the keys that match the given predicate.
diff --git a/matrix_sdk_crypto/src/olm/group_sessions/inbound.rs b/matrix_sdk_crypto/src/olm/group_sessions/inbound.rs
index a7249563..5d6036ab 100644
--- a/matrix_sdk_crypto/src/olm/group_sessions/inbound.rs
+++ b/matrix_sdk_crypto/src/olm/group_sessions/inbound.rs
@@ -34,8 +34,8 @@ pub use olm_rs::{
 
 use matrix_sdk_common::{
     events::{
-        forwarded_room_key::ForwardedRoomKeyEventContent, room::encrypted::EncryptedEventContent,
-        AnySyncRoomEvent, SyncMessageEvent,
+        forwarded_room_key::ForwardedRoomKeyToDeviceEventContent,
+        room::encrypted::EncryptedEventContent, AnySyncRoomEvent, SyncMessageEvent,
     },
     identifiers::{DeviceKeyAlgorithm, EventEncryptionAlgorithm, RoomId},
     locks::Mutex,
@@ -57,6 +57,7 @@ use crate::error::{EventError, MegolmResult};
 pub struct InboundGroupSession {
     inner: Arc<Mutex<OlmInboundGroupSession>>,
     session_id: Arc<str>,
+    first_known_index: u32,
     pub(crate) sender_key: Arc<str>,
     pub(crate) signing_key: Arc<BTreeMap<DeviceKeyAlgorithm, String>>,
     pub(crate) room_id: Arc<RoomId>,
@@ -89,6 +90,7 @@ impl InboundGroupSession {
     ) -> Result<Self, OlmGroupSessionError> {
         let session = OlmInboundGroupSession::new(&session_key.0)?;
         let session_id = session.session_id();
+        let first_known_index = session.first_known_index();
 
         let mut keys: BTreeMap<DeviceKeyAlgorithm, String> = BTreeMap::new();
         keys.insert(DeviceKeyAlgorithm::Ed25519, signing_key.to_owned());
@@ -97,6 +99,7 @@ impl InboundGroupSession {
             inner: Arc::new(Mutex::new(session)),
             session_id: session_id.into(),
             sender_key: sender_key.to_owned().into(),
+            first_known_index,
             signing_key: Arc::new(keys),
             room_id: Arc::new(room_id.clone()),
             forwarding_chains: Arc::new(Mutex::new(None)),
@@ -129,11 +132,12 @@ impl InboundGroupSession {
     /// to create the `InboundGroupSession`.
     pub(crate) fn from_forwarded_key(
         sender_key: &str,
-        content: &mut ForwardedRoomKeyEventContent,
+        content: &mut ForwardedRoomKeyToDeviceEventContent,
     ) -> Result<Self, OlmGroupSessionError> {
         let key = Zeroizing::from(mem::take(&mut content.session_key));
 
         let session = OlmInboundGroupSession::import(&key)?;
+        let first_known_index = session.first_known_index();
         let mut forwarding_chains = content.forwarding_curve25519_key_chain.clone();
         forwarding_chains.push(sender_key.to_owned());
 
@@ -147,6 +151,7 @@ impl InboundGroupSession {
             inner: Arc::new(Mutex::new(session)),
             session_id: content.session_id.as_str().into(),
             sender_key: content.sender_key.as_str().into(),
+            first_known_index,
             signing_key: Arc::new(sender_claimed_key),
             room_id: Arc::new(content.room_id.clone()),
             forwarding_chains: Arc::new(Mutex::new(Some(forwarding_chains))),
@@ -178,7 +183,7 @@ impl InboundGroupSession {
     /// If only a limited part of this session should be exported use
     /// [`export_at_index()`](#method.export_at_index).
     pub async fn export(&self) -> ExportedRoomKey {
-        self.export_at_index(self.first_known_index().await)
+        self.export_at_index(self.first_known_index())
             .await
             .expect("Can't export at the first known index")
     }
@@ -221,12 +226,14 @@ impl InboundGroupSession {
         pickle_mode: PicklingMode,
     ) -> Result<Self, OlmGroupSessionError> {
         let session = OlmInboundGroupSession::unpickle(pickle.pickle.0, pickle_mode)?;
+        let first_known_index = session.first_known_index();
         let session_id = session.session_id();
 
         Ok(InboundGroupSession {
             inner: Arc::new(Mutex::new(session)),
             session_id: session_id.into(),
             sender_key: pickle.sender_key.into(),
+            first_known_index,
             signing_key: Arc::new(pickle.signing_key),
             room_id: Arc::new(pickle.room_id),
             forwarding_chains: Arc::new(Mutex::new(pickle.forwarding_chains)),
@@ -245,8 +252,8 @@ impl InboundGroupSession {
     }
 
     /// Get the first message index we know how to decrypt.
-    pub async fn first_known_index(&self) -> u32 {
-        self.inner.lock().await.first_known_index()
+    pub fn first_known_index(&self) -> u32 {
+        self.first_known_index
     }
 
     /// Decrypt the given ciphertext.
@@ -368,6 +375,7 @@ impl TryFrom<ExportedRoomKey> for InboundGroupSession {
 
     fn try_from(key: ExportedRoomKey) -> Result<Self, Self::Error> {
         let session = OlmInboundGroupSession::import(&key.session_key.0)?;
+        let first_known_index = session.first_known_index();
 
         let forwarding_chains = if key.forwarding_curve25519_key_chain.is_empty() {
             None
@@ -379,6 +387,7 @@ impl TryFrom<ExportedRoomKey> for InboundGroupSession {
             inner: Arc::new(Mutex::new(session)),
             session_id: key.session_id.into(),
             sender_key: key.sender_key.into(),
+            first_known_index,
             signing_key: Arc::new(key.sender_claimed_keys),
             room_id: Arc::new(key.room_id),
             forwarding_chains: Arc::new(Mutex::new(forwarding_chains)),
diff --git a/matrix_sdk_crypto/src/olm/group_sessions/mod.rs b/matrix_sdk_crypto/src/olm/group_sessions/mod.rs
index a78bde53..04174fcb 100644
--- a/matrix_sdk_crypto/src/olm/group_sessions/mod.rs
+++ b/matrix_sdk_crypto/src/olm/group_sessions/mod.rs
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 use matrix_sdk_common::{
-    events::forwarded_room_key::ForwardedRoomKeyEventContent,
+    events::forwarded_room_key::ForwardedRoomKeyToDeviceEventContent,
     identifiers::{DeviceKeyAlgorithm, EventEncryptionAlgorithm, RoomId},
 };
 use serde::{Deserialize, Serialize};
@@ -66,7 +66,7 @@ pub struct ExportedRoomKey {
     pub forwarding_curve25519_key_chain: Vec<String>,
 }
 
-impl TryInto<ForwardedRoomKeyEventContent> for ExportedRoomKey {
+impl TryInto<ForwardedRoomKeyToDeviceEventContent> for ExportedRoomKey {
     type Error = ();
 
     /// Convert an exported room key into a content for a forwarded room key
@@ -75,7 +75,7 @@ impl TryInto<ForwardedRoomKeyEventContent> for ExportedRoomKey {
     /// This will fail if the exported room key has multiple sender claimed keys
     /// or if the algorithm of the claimed sender key isn't
     /// `DeviceKeyAlgorithm::Ed25519`.
-    fn try_into(self) -> Result<ForwardedRoomKeyEventContent, Self::Error> {
+    fn try_into(self) -> Result<ForwardedRoomKeyToDeviceEventContent, Self::Error> {
         if self.sender_claimed_keys.len() != 1 {
             Err(())
         } else {
@@ -85,7 +85,7 @@ impl TryInto<ForwardedRoomKeyEventContent> for ExportedRoomKey {
                 return Err(());
             }
 
-            Ok(ForwardedRoomKeyEventContent {
+            Ok(ForwardedRoomKeyToDeviceEventContent {
                 algorithm: self.algorithm,
                 room_id: self.room_id,
                 sender_key: self.sender_key,
@@ -98,9 +98,9 @@ impl TryInto<ForwardedRoomKeyEventContent> for ExportedRoomKey {
     }
 }
 
-impl From<ForwardedRoomKeyEventContent> for ExportedRoomKey {
+impl From<ForwardedRoomKeyToDeviceEventContent> for ExportedRoomKey {
     /// Convert the content of a forwarded room key into a exported room key.
-    fn from(forwarded_key: ForwardedRoomKeyEventContent) -> Self {
+    fn from(forwarded_key: ForwardedRoomKeyToDeviceEventContent) -> Self {
         let mut sender_claimed_keys: BTreeMap<DeviceKeyAlgorithm, String> = BTreeMap::new();
         sender_claimed_keys.insert(
             DeviceKeyAlgorithm::Ed25519,
diff --git a/matrix_sdk_crypto/src/olm/mod.rs b/matrix_sdk_crypto/src/olm/mod.rs
index 2ec94b23..00d9a7aa 100644
--- a/matrix_sdk_crypto/src/olm/mod.rs
+++ b/matrix_sdk_crypto/src/olm/mod.rs
@@ -40,7 +40,7 @@ pub(crate) mod test {
     use crate::olm::{InboundGroupSession, ReadOnlyAccount, Session};
     use matrix_sdk_common::{
         api::r0::keys::SignedKey,
-        events::forwarded_room_key::ForwardedRoomKeyEventContent,
+        events::forwarded_room_key::ForwardedRoomKeyToDeviceEventContent,
         identifiers::{room_id, user_id, DeviceId, UserId},
     };
     use olm_rs::session::OlmMessage;
@@ -213,7 +213,7 @@ pub(crate) mod test {
         )
         .unwrap();
 
-        assert_eq!(0, inbound.first_known_index().await);
+        assert_eq!(0, inbound.first_known_index());
 
         assert_eq!(outbound.session_id(), inbound.session_id());
 
@@ -237,7 +237,7 @@ pub(crate) mod test {
             .unwrap();
 
         let export = inbound.export().await;
-        let export: ForwardedRoomKeyEventContent = export.try_into().unwrap();
+        let export: ForwardedRoomKeyToDeviceEventContent = export.try_into().unwrap();
 
         let imported = InboundGroupSession::from_export(export).unwrap();
 
diff --git a/matrix_sdk_crypto/src/verification/sas/helpers.rs b/matrix_sdk_crypto/src/verification/sas/helpers.rs
index b58d744a..106727b8 100644
--- a/matrix_sdk_crypto/src/verification/sas/helpers.rs
+++ b/matrix_sdk_crypto/src/verification/sas/helpers.rs
@@ -21,7 +21,7 @@ use olm_rs::sas::OlmSas;
 use matrix_sdk_common::{
     api::r0::to_device::DeviceIdOrAllDevices,
     events::{
-        key::verification::{cancel::CancelCode, mac::MacEventContent},
+        key::verification::{cancel::CancelCode, mac::MacToDeviceEventContent},
         AnyToDeviceEventContent, EventType, ToDeviceEvent,
     },
     identifiers::{DeviceId, DeviceKeyAlgorithm, DeviceKeyId, UserId},
@@ -159,7 +159,7 @@ pub fn receive_mac_event(
     sas: &OlmSas,
     ids: &SasIds,
     flow_id: &str,
-    event: &ToDeviceEvent<MacEventContent>,
+    event: &ToDeviceEvent<MacToDeviceEventContent>,
 ) -> Result<(Vec<ReadOnlyDevice>, Vec<UserIdentities>), CancelCode> {
     let mut verified_devices = Vec::new();
     let mut verified_identities = Vec::new();
@@ -270,7 +270,7 @@ fn extra_mac_info_send(ids: &SasIds, flow_id: &str) -> String {
 /// # Panics
 ///
 /// This will panic if the public key of the other side wasn't set.
-pub fn get_mac_content(sas: &OlmSas, ids: &SasIds, flow_id: &str) -> MacEventContent {
+pub fn get_mac_content(sas: &OlmSas, ids: &SasIds, flow_id: &str) -> MacToDeviceEventContent {
     let mut mac: BTreeMap<String, String> = BTreeMap::new();
 
     let key_id = DeviceKeyId::from_parts(DeviceKeyAlgorithm::Ed25519, ids.account.device_id());
@@ -291,7 +291,7 @@ pub fn get_mac_content(sas: &OlmSas, ids: &SasIds, flow_id: &str) -> MacEventCon
         .calculate_mac(&keys.join(","), &format!("{}KEY_IDS", &info))
         .expect("Can't calculate SAS MAC");
 
-    MacEventContent {
+    MacToDeviceEventContent {
         transaction_id: flow_id.to_owned(),
         keys,
         mac,
diff --git a/matrix_sdk_crypto/src/verification/sas/mod.rs b/matrix_sdk_crypto/src/verification/sas/mod.rs
index 476eadc2..d6f1322f 100644
--- a/matrix_sdk_crypto/src/verification/sas/mod.rs
+++ b/matrix_sdk_crypto/src/verification/sas/mod.rs
@@ -25,8 +25,8 @@ use matrix_sdk_common::{
     api::r0::keys::upload_signatures::Request as SignatureUploadRequest,
     events::{
         key::verification::{
-            accept::AcceptEventContent, cancel::CancelCode, mac::MacEventContent,
-            start::StartEventContent,
+            accept::AcceptToDeviceEventContent, cancel::CancelCode, mac::MacToDeviceEventContent,
+            start::StartToDeviceEventContent,
         },
         AnyToDeviceEvent, AnyToDeviceEventContent, ToDeviceEvent,
     },
@@ -122,7 +122,7 @@ impl Sas {
         other_device: ReadOnlyDevice,
         store: Arc<Box<dyn CryptoStore>>,
         other_identity: Option<UserIdentities>,
-    ) -> (Sas, StartEventContent) {
+    ) -> (Sas, StartToDeviceEventContent) {
         let (inner, content) = InnerSas::start(
             account.clone(),
             other_device.clone(),
@@ -158,7 +158,7 @@ impl Sas {
         private_identity: PrivateCrossSigningIdentity,
         other_device: ReadOnlyDevice,
         store: Arc<Box<dyn CryptoStore>>,
-        event: &ToDeviceEvent<StartEventContent>,
+        event: &ToDeviceEvent<StartToDeviceEventContent>,
         other_identity: Option<UserIdentities>,
     ) -> Result<Sas, AnyToDeviceEventContent> {
         let inner = InnerSas::from_start_event(
@@ -554,7 +554,7 @@ impl InnerSas {
         account: ReadOnlyAccount,
         other_device: ReadOnlyDevice,
         other_identity: Option<UserIdentities>,
-    ) -> (InnerSas, StartEventContent) {
+    ) -> (InnerSas, StartToDeviceEventContent) {
         let sas = SasState::<Created>::new(account, other_device, other_identity);
         let content = sas.as_content();
         (InnerSas::Created(sas), content)
@@ -563,7 +563,7 @@ impl InnerSas {
     fn from_start_event(
         account: ReadOnlyAccount,
         other_device: ReadOnlyDevice,
-        event: &ToDeviceEvent<StartEventContent>,
+        event: &ToDeviceEvent<StartToDeviceEventContent>,
         other_identity: Option<UserIdentities>,
     ) -> Result<InnerSas, AnyToDeviceEventContent> {
         match SasState::<Started>::from_start_event(account, other_device, event, other_identity) {
@@ -572,7 +572,7 @@ impl InnerSas {
         }
     }
 
-    fn accept(&self) -> Option<AcceptEventContent> {
+    fn accept(&self) -> Option<AcceptToDeviceEventContent> {
         if let InnerSas::Started(s) = self {
             Some(s.as_content())
         } else {
@@ -610,7 +610,7 @@ impl InnerSas {
         (InnerSas::Canceled(sas), Some(content))
     }
 
-    fn confirm(self) -> (InnerSas, Option<MacEventContent>) {
+    fn confirm(self) -> (InnerSas, Option<MacToDeviceEventContent>) {
         match self {
             InnerSas::KeyRecieved(s) => {
                 let sas = s.confirm();
diff --git a/matrix_sdk_crypto/src/verification/sas/sas_state.rs b/matrix_sdk_crypto/src/verification/sas/sas_state.rs
index 4065d2f7..90966008 100644
--- a/matrix_sdk_crypto/src/verification/sas/sas_state.rs
+++ b/matrix_sdk_crypto/src/verification/sas/sas_state.rs
@@ -25,13 +25,13 @@ use matrix_sdk_common::{
     events::{
         key::verification::{
             accept::{
-                AcceptEventContent, AcceptMethod, MSasV1Content as AcceptV1Content,
+                AcceptMethod, AcceptToDeviceEventContent, MSasV1Content as AcceptV1Content,
                 MSasV1ContentInit as AcceptV1ContentInit,
             },
-            cancel::{CancelCode, CancelEventContent},
-            key::KeyEventContent,
-            mac::MacEventContent,
-            start::{MSasV1Content, MSasV1ContentInit, StartEventContent, StartMethod},
+            cancel::{CancelCode, CancelToDeviceEventContent},
+            key::KeyToDeviceEventContent,
+            mac::MacToDeviceEventContent,
+            start::{MSasV1Content, MSasV1ContentInit, StartMethod, StartToDeviceEventContent},
             HashAlgorithm, KeyAgreementProtocol, MessageAuthenticationCode,
             ShortAuthenticationString, VerificationMethod,
         },
@@ -319,8 +319,8 @@ impl SasState<Created> {
     /// Get the content for the start event.
     ///
     /// The content needs to be sent to the other device.
-    pub fn as_content(&self) -> StartEventContent {
-        StartEventContent {
+    pub fn as_content(&self) -> StartToDeviceEventContent {
+        StartToDeviceEventContent {
             transaction_id: self.verification_flow_id.to_string(),
             from_device: self.device_id().into(),
             method: StartMethod::MSasV1(
@@ -339,7 +339,7 @@ impl SasState<Created> {
     /// the other side.
     pub fn into_accepted(
         self,
-        event: &ToDeviceEvent<AcceptEventContent>,
+        event: &ToDeviceEvent<AcceptToDeviceEventContent>,
     ) -> Result<SasState<Accepted>, SasState<Canceled>> {
         self.check_event(&event.sender, &event.content.transaction_id)
             .map_err(|c| self.clone().cancel(c))?;
@@ -386,7 +386,7 @@ impl SasState<Started> {
     pub fn from_start_event(
         account: ReadOnlyAccount,
         other_device: ReadOnlyDevice,
-        event: &ToDeviceEvent<StartEventContent>,
+        event: &ToDeviceEvent<StartToDeviceEventContent>,
         other_identity: Option<UserIdentities>,
     ) -> Result<SasState<Started>, SasState<Canceled>> {
         if let StartMethod::MSasV1(content) = &event.content.method {
@@ -462,10 +462,10 @@ impl SasState<Started> {
     /// This should be sent out automatically if the SAS verification flow has
     /// been started because of a
     /// m.key.verification.request -> m.key.verification.ready flow.
-    pub fn as_content(&self) -> AcceptEventContent {
+    pub fn as_content(&self) -> AcceptToDeviceEventContent {
         let accepted_protocols = AcceptedProtocols::default();
 
-        AcceptEventContent {
+        AcceptToDeviceEventContent {
             transaction_id: self.verification_flow_id.to_string(),
             method: AcceptMethod::MSasV1(
                 AcceptV1ContentInit {
@@ -494,7 +494,7 @@ impl SasState<Started> {
     /// anymore.
     pub fn into_key_received(
         self,
-        event: &mut ToDeviceEvent<KeyEventContent>,
+        event: &mut ToDeviceEvent<KeyToDeviceEventContent>,
     ) -> Result<SasState<KeyReceived>, SasState<Canceled>> {
         self.check_event(&event.sender, &event.content.transaction_id)
             .map_err(|c| self.clone().cancel(c))?;
@@ -535,7 +535,7 @@ impl SasState<Accepted> {
     /// anymore.
     pub fn into_key_received(
         self,
-        event: &mut ToDeviceEvent<KeyEventContent>,
+        event: &mut ToDeviceEvent<KeyToDeviceEventContent>,
     ) -> Result<SasState<KeyReceived>, SasState<Canceled>> {
         self.check_event(&event.sender, &event.content.transaction_id)
             .map_err(|c| self.clone().cancel(c))?;
@@ -575,8 +575,8 @@ impl SasState<Accepted> {
     /// Get the content for the key event.
     ///
     /// The content needs to be automatically sent to the other side.
-    pub fn as_content(&self) -> KeyEventContent {
-        KeyEventContent {
+    pub fn as_content(&self) -> KeyToDeviceEventContent {
+        KeyToDeviceEventContent {
             transaction_id: self.verification_flow_id.to_string(),
             key: self.inner.lock().unwrap().public_key(),
         }
@@ -588,8 +588,8 @@ impl SasState<KeyReceived> {
     ///
     /// The content needs to be automatically sent to the other side if and only
     /// if we_started is false.
-    pub fn as_content(&self) -> KeyEventContent {
-        KeyEventContent {
+    pub fn as_content(&self) -> KeyToDeviceEventContent {
+        KeyToDeviceEventContent {
             transaction_id: self.verification_flow_id.to_string(),
             key: self.inner.lock().unwrap().public_key(),
         }
@@ -632,7 +632,7 @@ impl SasState<KeyReceived> {
     /// the other side.
     pub fn into_mac_received(
         self,
-        event: &ToDeviceEvent<MacEventContent>,
+        event: &ToDeviceEvent<MacToDeviceEventContent>,
     ) -> Result<SasState<MacReceived>, SasState<Canceled>> {
         self.check_event(&event.sender, &event.content.transaction_id)
             .map_err(|c| self.clone().cancel(c))?;
@@ -688,7 +688,7 @@ impl SasState<Confirmed> {
     /// the other side.
     pub fn into_done(
         self,
-        event: &ToDeviceEvent<MacEventContent>,
+        event: &ToDeviceEvent<MacToDeviceEventContent>,
     ) -> Result<SasState<Done>, SasState<Canceled>> {
         self.check_event(&event.sender, &event.content.transaction_id)
             .map_err(|c| self.clone().cancel(c))?;
@@ -718,7 +718,7 @@ impl SasState<Confirmed> {
     /// Get the content for the mac event.
     ///
     /// The content needs to be automatically sent to the other side.
-    pub fn as_content(&self) -> MacEventContent {
+    pub fn as_content(&self) -> MacToDeviceEventContent {
         get_mac_content(
             &self.inner.lock().unwrap(),
             &self.ids,
@@ -780,7 +780,7 @@ impl SasState<Done> {
     ///
     /// The content needs to be automatically sent to the other side if it
     /// wasn't already sent.
-    pub fn as_content(&self) -> MacEventContent {
+    pub fn as_content(&self) -> MacToDeviceEventContent {
         get_mac_content(
             &self.inner.lock().unwrap(),
             &self.ids,
@@ -829,7 +829,7 @@ impl Canceled {
 
 impl SasState<Canceled> {
     pub fn as_content(&self) -> AnyToDeviceEventContent {
-        AnyToDeviceEventContent::KeyVerificationCancel(CancelEventContent {
+        AnyToDeviceEventContent::KeyVerificationCancel(CancelToDeviceEventContent {
             transaction_id: self.verification_flow_id.to_string(),
             reason: self.state.reason.to_string(),
             code: self.state.cancel_code.clone(),