use ruma::{CanonicalJsonObject, EventId};

use crate::Result;

pub(crate) trait Data: Send + Sync {
    /// Returns the pdu from the outlier tree.
    fn get_outlier_pdu_json(
        &self,
        event_id: &EventId,
    ) -> Result<Option<CanonicalJsonObject>>;

    /// Append the PDU as an outlier.
    fn add_pdu_outlier(
        &self,
        event_id: &EventId,
        pdu: &CanonicalJsonObject,
    ) -> Result<()>;
}