Trait Callback 

pub trait Callback {
    // Required methods
    fn balance(&self, _: Address) -> U256;
    fn nonce(&self, _: Address) -> U256;
    fn code(&self, _: Address) -> Vec<u8> ;
    fn storage(&self, _: Address, _: U256) -> M256;
    fn exists(&self, _: Address) -> bool;
    fn blockhash(&self, _: U256) -> H256;
}

Required Methods

fn balance(&self, _: Address) -> U256

fn nonce(&self, _: Address) -> U256

fn code(&self, _: Address) -> Vec<u8>

fn storage(&self, _: Address, _: U256) -> M256

fn exists(&self, _: Address) -> bool

fn blockhash(&self, _: U256) -> H256

Implementors