Trait AsyncBlobStore 

pub trait AsyncBlobStore:
    Debug
    + Send
    + Sync {
    // Required methods
    fn read_blob(
        &self,
    ) -> Pin<Box<dyn Future<Output = Result<Option<Vec<u8>>, String>> + Send + '_>>;
    fn write_blob(
        &self,
        bytes: Vec<u8>,
    ) -> Pin<Box<dyn Future<Output = Result<(), String>> + Send + '_>>;
}

[CR-4] re-export so hosts can build ClientConfig { storage_backend: … } without pulling ping_mls_store in directly. AsyncBlobStore is the async single-blob trait WASM hosts implement to back StorageBackend::IndexedDb; BlobFuture is the matching future-type helper. Async single-blob storage. Reads + writes the entire MLS snapshot as one opaque byte slab; the provider takes care of (de)serialising the MemoryStorage HashMap inside that slab.

Native targets get Send + Sync so the provider can be shared across tokio threads; WASM drops the bound to match wasm-bindgen + JsFuture being !Send.

Debug is required so crate::StorageBackend can still derive Debug without resorting to a manual impl on the enum.

Required Methods

fn read_blob( &self, ) -> Pin<Box<dyn Future<Output = Result<Option<Vec<u8>>, String>> + Send + '_>>

Return the previously-written snapshot, or Ok(None) when the store is empty. Errors propagate as String so we don’t have to pull the host’s error type into this crate.

fn write_blob( &self, bytes: Vec<u8>, ) -> Pin<Box<dyn Future<Output = Result<(), String>> + Send + '_>>

Overwrite the snapshot. Implementations MUST be atomic (a partial write would leave the provider unable to load on next cold start).

Implementors