async fn lookup_pending_nonce(
        &self,
        _account_address: Address,
        _last_known_nonce: u32,
    ) -> Result<Option<Nonce>, Web3Error> {
        Ok(None)
    }
Attempts to look up the pending nonce for the account in the sink-specific storage.
By default, returns `Ok(None)`.
core/node/api_server/src/tx_sender/tx_sink.rs