pub trait BackendReader<Block: BlockT> {
// Required methods
fn block_hash<'life0, 'life1, 'async_trait>(
&'life0 self,
ethereum_block_hash: &'life1 H256
) -> Pin<Box<dyn Future<Output = Result<Option<Vec<Block::Hash>>, String>> + Send + 'async_trait>>
where Self: 'async_trait,
'life0: 'async_trait,
'life1: 'async_trait;
fn transaction_metadata<'life0, 'life1, 'async_trait>(
&'life0 self,
ethereum_transaction_hash: &'life1 H256
) -> Pin<Box<dyn Future<Output = Result<Vec<TransactionMetadata<Block>>, String>> + Send + 'async_trait>>
where Self: 'async_trait,
'life0: 'async_trait,
'life1: 'async_trait;
fn filter_logs<'life0, 'async_trait>(
&'life0 self,
from_block: u64,
to_block: u64,
addresses: Vec<H160>,
topics: Vec<Vec<Option<H256>>>
) -> Pin<Box<dyn Future<Output = Result<Vec<FilteredLog<Block>>, String>> + Send + 'async_trait>>
where Self: 'async_trait,
'life0: 'async_trait;
fn is_indexed(&self) -> bool;
}