trait ExternalFetcherT: Send + Sync {
// Required methods
fn kind(&self) -> FetcherKind;
fn timeout(&self) -> Duration;
fn concurrency(&self) -> usize;
fn invalid_api_key(&self) -> &AtomicBool;
fn fetch<'life0, 'async_trait>(
&'life0 self,
address: Address,
) -> Pin<Box<dyn Future<Output = Result<Option<Metadata>, EtherscanError>> + Send + 'async_trait>>
where Self: 'async_trait,
'life0: 'async_trait;
}