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    // Copyright 2015-2017 Parity Technologies (UK) Ltd.
    // This file is part of Parity.

    // Parity is free software: you can redistribute it and/or modify
    // it under the terms of the GNU General Public License as published by
    // the Free Software Foundation, either version 3 of the License, or
    // (at your option) any later version.

    // Parity is distributed in the hope that it will be useful,
    // but WITHOUT ANY WARRANTY; without even the implied warranty of
    // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    // GNU General Public License for more details.

    // You should have received a copy of the GNU General Public License
    // along with Parity.  If not, see <http://www.gnu.org/licenses/>.

    //! Ethereum protocol module.
    //!
    //! Contains all Ethereum network specific stuff, such as denominations and
    //! consensus specifications.

    /// Export the ethash module.
    pub mod ethash;
    /// Export the denominations module.
    pub mod denominations;

    pub use self::ethash::{Ethash};
    pub use self::denominations::*;

    use super::spec::*;

    /// Most recent fork block that we support on Mainnet.
    pub const FORK_SUPPORTED_FRONTIER: u64 = 2675000;

    /// Most recent fork block that we support on Ropsten.
    pub const FORK_SUPPORTED_ROPSTEN: u64 = 10;

    fn load(b: &[u8]) -> Spec {
    	Spec::load(b).expect("chain spec is invalid")
    }

    /// Create a new Olympic chain spec.
    pub fn new_olympic() -> Spec { load(include_bytes!("../../res/ethereum/olympic.json")) }

    /// Create a new Frontier mainnet chain spec.
    pub fn new_frontier() -> Spec { load(include_bytes!("../../res/ethereum/frontier.json")) }

    /// Create a new Frontier mainnet chain spec without the DAO hardfork.
    pub fn new_classic() -> Spec { load(include_bytes!("../../res/ethereum/classic.json")) }

    /// Create a new Frontier mainnet chain spec without the DAO hardfork.
    pub fn new_expanse() -> Spec { load(include_bytes!("../../res/ethereum/expanse.json")) }

    /// Create a new Frontier chain spec as though it never changes to Homestead.
    pub fn new_frontier_test() -> Spec { load(include_bytes!("../../res/ethereum/frontier_test.json")) }

    /// Create a new Homestead chain spec as though it never changed from Frontier.
    pub fn new_homestead_test() -> Spec { load(include_bytes!("../../res/ethereum/homestead_test.json")) }

    /// Create a new Homestead-EIP150 chain spec as though it never changed from Homestead/Frontier.
    pub fn new_eip150_test() -> Spec { load(include_bytes!("../../res/ethereum/eip150_test.json")) }

    /// Create a new Homestead-EIP150 chain spec as though it never changed from Homestead/Frontier.
    pub fn new_eip161_test() -> Spec { load(include_bytes!("../../res/ethereum/eip161_test.json")) }

    /// Create a new Frontier/Homestead/DAO chain spec with transition points at #5 and #8.
    pub fn new_transition_test() -> Spec { load(include_bytes!("../../res/ethereum/transition_test.json")) }

    /// Create a new Frontier main net chain spec without genesis accounts.
    pub fn new_mainnet_like() -> Spec { load(include_bytes!("../../res/ethereum/frontier_like_test.json")) }

    /// Create a new Ropsten chain spec.
    pub fn new_ropsten() -> Spec { load(include_bytes!("../../res/ethereum/ropsten.json")) }

    /// Create a new Morden chain spec.
    pub fn new_morden() -> Spec { load(include_bytes!("../../res/ethereum/morden.json")) }

    #[cfg(test)]
    mod tests {
    	use util::*;
    	use state::*;
    	use super::*;
    	use tests::helpers::*;
    	use views::BlockView;

    	#[test]
    	fn ensure_db_good() {
    		let spec = new_morden();
    		let engine = &spec.engine;
    		let genesis_header = spec.genesis_header();
    		let mut db_result = get_temp_state_db();
    		let db = spec.ensure_db_good(db_result.take(), &Default::default()).unwrap();
    		let s = State::from_existing(db, genesis_header.state_root().clone(), engine.account_start_nonce(), Default::default()).unwrap();
    		assert_eq!(s.balance(&"0000000000000000000000000000000000000001".into()), 1u64.into());
    		assert_eq!(s.balance(&"0000000000000000000000000000000000000002".into()), 1u64.into());
    		assert_eq!(s.balance(&"0000000000000000000000000000000000000003".into()), 1u64.into());
    		assert_eq!(s.balance(&"0000000000000000000000000000000000000004".into()), 1u64.into());
    		assert_eq!(s.balance(&"102e61f5d8f9bc71d0ad4a084df4e65e05ce0e1c".into()), U256::from(1u64) << 200);
    		assert_eq!(s.balance(&"0000000000000000000000000000000000000000".into()), 0u64.into());
    	}

    	#[test]
    	fn morden() {
    		let morden = new_morden();

    		assert_eq!(morden.state_root(), "f3f4696bbf3b3b07775128eb7a3763279a394e382130f27c21e70233e04946a9".into());
    		let genesis = morden.genesis_block();
    		assert_eq!(BlockView::new(&genesis).header_view().sha3(), "0cd786a2425d16f152c658316c423e6ce1181e15c3295826d7c9904cba9ce303".into());

    		let _ = morden.engine;
    	}

    	#[test]
    	fn frontier() {
    		let frontier = new_frontier();

    		assert_eq!(frontier.state_root(), "d7f8974fb5ac78d9ac099b9ad5018bedc2ce0a72dad1827a1709da30580f0544".into());
    		let genesis = frontier.genesis_block();
    		assert_eq!(BlockView::new(&genesis).header_view().sha3(), "d4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3".into());

    		let _ = frontier.engine;
    	}
    }

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