use util::*;

/// Simple vector of hashes, should be at most 256 items large, can be smaller if being used
/// for a block whose number is less than 257.
pub type LastHashes = Vec<H256>;

/// Information concerning the execution environment for a message-call/contract-creation.
pub struct EnvInfo {
	/// The block number.
	pub number: U256,
	/// The block author.
	pub author: Address,
	/// The block timestamp.
	pub timestamp: U256,
	/// The block difficulty.
	pub difficulty: U256,
	/// The block gas limit.
	pub gas_limit: U256,
	/// The last 256 block hashes.
	pub last_hashes: LastHashes,
	/// The gas used.
	pub gas_used: U256,
}