openethereum/src/evm/ext.rs

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//! Interface for Evm externalities.
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use util::hash::*;
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use util::uint::*;
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use util::bytes::*;
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pub trait Ext {
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/// Returns a value for given key.
fn sload(&self, key: &H256) -> H256;
/// Stores a value for given key.
fn sstore(&mut self, key: H256, value: H256);
/// Returns address balance.
fn balance(&self, address: &Address) -> U256;
/// Returns the hash of one of the 256 most recent complete blocks.
fn blockhash(&self, number: &U256) -> H256;
/// Creates new contract.
/// Returns new contract address and gas used.
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fn create(&mut self, gas: u64, endowment: &U256, code: &[u8]) -> (Address, u64);
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/// Calls existing contract.
/// Returns call output and gas used.
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fn call(&mut self, gas: u64, call_gas: u64, receive_address: &Address, value: &U256, data: &[u8], code_address: &Address) -> Option<(Vec<u8>, u64)>;
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/// Returns code at given address
fn extcode(&self, address: &Address) -> Vec<u8>;
/// Creates log entry with given topics and data
fn log(&mut self, topics: Vec<H256>, data: Bytes);
}