Fix simple_scenario_sync and remove async for now

mls-rs-uniffi/src/config/group_state.rs

@@ -4,7 +4,7 @@ use mls_rs_core::mls_rs_codec::{MlsDecode, MlsEncode};
 
 use super::FFICallbackError;
 
-#[derive(Clone, Debug, uniffi::Object)]
+#[derive(Clone, Debug, uniffi::Record)]
 pub struct GroupState {
     pub id: Vec<u8>,
     pub data: Vec<u8>,
@@ -16,7 +16,7 @@ impl mls_rs_core::group::GroupState for GroupState {
     }
 }
 
-#[derive(Clone, Debug, uniffi::Object)]
+#[derive(Clone, Debug, uniffi::Record)]
 pub struct EpochRecord {
     pub id: u64,
     pub data: Vec<u8>,
@@ -41,9 +41,9 @@ pub trait GroupStateStorage: Send + Sync + Debug {
 
     async fn write(
         &self,
-        state: Arc<GroupState>,
-        epoch_inserts: Vec<Arc<EpochRecord>>,
-        epoch_updates: Vec<Arc<EpochRecord>>,
+        state: GroupState,
+        epoch_inserts: Vec<EpochRecord>,
+        epoch_updates: Vec<EpochRecord>,
     ) -> Result<(), FFICallbackError>;
 
     async fn max_epoch_id(&self, group_id: Vec<u8>) -> Result<Option<u64>, FFICallbackError>;
@@ -99,16 +99,16 @@ impl mls_rs_core::group::GroupStateStorage for GroupStateStorageWrapper {
         ST: mls_rs_core::group::GroupState + MlsEncode + MlsDecode + Send + Sync,
         ET: mls_rs_core::group::EpochRecord + MlsEncode + MlsDecode + Send + Sync,
     {
-        let state = Arc::new(GroupState {
+        let state = GroupState {
             id: state.id(),
             data: state.mls_encode_to_vec()?,
-        });
+        };
 
         let epoch_to_record = |v: ET| -> Result<_, Self::Error> {
-            Ok(Arc::new(EpochRecord {
+            Ok(EpochRecord {
                 id: v.id(),
                 data: v.mls_encode_to_vec()?,
-            }))
+            })
         };
 
         let inserts = epoch_inserts

mls-rs-uniffi/src/lib.rs

@@ -53,12 +53,12 @@ fn arc_unwrap_or_clone<T: Clone>(arc: Arc<T>) -> T {
 #[uniffi(flat_error)]
 #[non_exhaustive]
 pub enum Error {
-    #[error("A mls-rs error occurred")]
+    #[error("A mls-rs error occurred: {inner}")]
     MlsError {
         #[from]
         inner: mls_rs::error::MlsError,
     },
-    #[error("An unknown error occurred")]
+    #[error("An unknown error occurred: {inner}")]
     AnyError {
         #[from]
         inner: mls_rs::error::AnyError,
@@ -329,6 +329,19 @@ impl Client {
             group_info_extensions,
         })
     }
+
+    /// Load an existing group.
+    ///
+    /// See [`mls_rs::Client::load_group`] for details.
+    pub async fn load_group(&self, group_id: Vec<u8>) -> Result<Group, Error> {
+        self.inner
+            .load_group(&group_id)
+            .await
+            .map(|g| Group {
+                inner: Arc::new(Mutex::new(g)),
+            })
+            .map_err(Into::into)
+    }
 }
 
 #[derive(Clone, Debug, uniffi::Object)]
@@ -423,6 +436,13 @@ async fn signing_identity_to_identifier(
 #[cfg_attr(not(mls_build_async), maybe_async::must_be_sync)]
 #[uniffi::export]
 impl Group {
+    /// Write the current state of the group to storage defined by
+    /// [`ClientConfig::group_state_storage`]
+    pub async fn write_to_storage(&self) -> Result<(), Error> {
+        let mut group = self.inner().await;
+        group.write_to_storage().await.map_err(Into::into)
+    }
+
     /// Perform a commit of received proposals (or an empty commit).
     ///
     /// TODO: ensure `path_required` is always set in

mls-rs-uniffi/test_bindings/simple_scenario_sync.py

@@ -1,10 +1,74 @@
-from mls_rs_uniffi import CipherSuite, generate_signature_keypair, Client
+from mls_rs_uniffi import CipherSuite, generate_signature_keypair, Client, GroupStateStorage, ClientConfig
+
+class EpochData:
+    def __init__(self, id: "int", data: "bytes"):
+        self.id = id
+        self.data = data
+
+class GroupStateData:
+    def __init__(self, state: "bytes"):
+        self.state = state
+        self.epoch_data = []
+
+class PythonGroupStateStorage(GroupStateStorage):
+    def __init__(self):
+        self.groups = {}
+
+    def state(self, group_id: "bytes"):
+        group = self.groups.get(group_id.hex())
+
+        if group == None:
+            return None 
+
+        group.state
+
+    def epoch(self, group_id: "bytes",epoch_id: "int"):
+        group = self.groups[group_id.hex()]
+
+        if group == None:
+            return None
+
+        for epoch in group.epoch_data:
+            if epoch.id == epoch_id:
+                return epoch
+
+        return None
+
+    def write(self, state: "GroupState",epoch_inserts: "typing.List[EpochRecord]",epoch_updates: "typing.List[EpochRecord]"):
+        if self.groups.get(state.id.hex()) == None:
+            self.groups[state.id.hex()] = GroupStateData(state.data)
+
+        group = self.groups[state.id.hex()]
+
+        for insert in epoch_inserts:
+            group.epoch_data.append(insert)
+
+        for update in epoch_updates:
+            for i in range(len(group.epoch_data)):
+                if group.epoch_data[i].id == update.id:
+                    group.epoch_data[i] = update
+
+    def max_epoch_id(self, group_id: "bytes"):
+        group = self.groups.get(group_id.hex())
+
+        if group == None:
+            return None 
+
+        last = group.epoch_data.last()
+
+        if last == None:
+            return None
+
+        return last.id
+
+group_state_storage = PythonGroupStateStorage()
+client_config = ClientConfig(group_state_storage)
 
 key = generate_signature_keypair(CipherSuite.CURVE25519_AES128)
-alice = Client(b'alice', key)
+alice = Client(b'alice', key, client_config)
 
 key = generate_signature_keypair(CipherSuite.CURVE25519_AES128)
-bob = Client(b'bob', key)
+bob = Client(b'bob', key, client_config)
 
 alice = alice.create_group(None)
 kp = bob.generate_key_package_message()
@@ -15,4 +79,7 @@
 msg = alice.encrypt_application_message(b'hello, bob')
 output = bob.process_incoming_message(msg)
 
-assert output.data == b'hello, bob'
+alice.write_to_storage()
+
+assert output.data == b'hello, bob'
+assert len(group_state_storage.groups) == 1