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use std::collections::BTreeMap;
use async_trait::async_trait;
use ruma::{
api::federation::discovery::{ServerSigningKeys, VerifyKey},
signatures::Ed25519KeyPair,
DeviceId, OwnedServerSigningKeyId, ServerName, UserId,
};
use crate::Result;
#[async_trait]
pub trait Data: Send + Sync {
fn next_count(&self) -> Result<u64>;
fn current_count(&self) -> Result<u64>;
async fn watch(&self, user_id: &UserId, device_id: &DeviceId) -> Result<()>;
fn cleanup(&self) -> Result<()>;
fn memory_usage(&self) -> Result<String>;
fn load_keypair(&self) -> Result<Ed25519KeyPair>;
fn remove_keypair(&self) -> Result<()>;
fn add_signing_key(
&self,
origin: &ServerName,
new_keys: ServerSigningKeys,
) -> Result<BTreeMap<OwnedServerSigningKeyId, VerifyKey>>;
/// This returns an empty `Ok(BTreeMap<..>)` when there are no keys found for the server.
fn signing_keys_for(
&self,
origin: &ServerName,
) -> Result<BTreeMap<OwnedServerSigningKeyId, VerifyKey>>;
fn database_version(&self) -> Result<u64>;
fn bump_database_version(&self, new_version: u64) -> Result<()>;
}
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