async fn estimator_worker<P: Provider<Ethereum> + Send + Sync + Clone + 'static, DB: DatabaseRef + Send + Sync + Clone>(
client: Arc<Flashbots<P>>,
encoder: impl SwapEncoder + Send + Sync + Clone + 'static,
compose_channel_rx: Broadcaster<MessageSwapCompose<DB>>,
compose_channel_tx: Broadcaster<MessageSwapCompose<DB>>,
) -> WorkerResult