Trait ethcore::client::StateClient

pub trait StateClient {
    type State: StateInfo;
    fn latest_state(&self) -> Self::State;
    fn state_at(&self, id: BlockId) -> Option<Self::State>;
}

Provides methods to access chain state

Associated Types

type State: StateInfo

Type representing chain state

Required Methods

fn latest_state(&self) -> Self::State

Get a copy of the best block's state.

fn state_at(&self, id: BlockId) -> Option<Self::State>

Attempt to get a copy of a specific block's final state.

This will not fail if given BlockId::Latest. Otherwise, this can fail (but may not) if the DB prunes state or the block is unknown.

Implementors

• impl StateClient for Client type State = State<StateDB>;

• impl StateClient for TestBlockChainClient type State = ();