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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/>.

    //! Snapshot manifest type definition

    use util::hash::H256;
    use rlp::*;
    use util::Bytes;

    /// Manifest data.
    #[derive(Debug, Clone, PartialEq, Eq)]
    #[cfg_attr(feature = "ipc", binary)]
    pub struct ManifestData {
    	/// List of state chunk hashes.
    	pub state_hashes: Vec<H256>,
    	/// List of block chunk hashes.
    	pub block_hashes: Vec<H256>,
    	/// The final, expected state root.
    	pub state_root: H256,
    	/// Block number this snapshot was taken at.
    	pub block_number: u64,
    	/// Block hash this snapshot was taken at.
    	pub block_hash: H256,
    }

    impl ManifestData {
    	/// Encode the manifest data to rlp.
    	pub fn into_rlp(self) -> Bytes {
    		let mut stream = RlpStream::new_list(5);
    		stream.append(&self.state_hashes);
    		stream.append(&self.block_hashes);
    		stream.append(&self.state_root);
    		stream.append(&self.block_number);
    		stream.append(&self.block_hash);

    		stream.out()
    	}

    	/// Try to restore manifest data from raw bytes, interpreted as RLP.
    	pub fn from_rlp(raw: &[u8]) -> Result<Self, DecoderError> {
    		let decoder = UntrustedRlp::new(raw);

    		let state_hashes: Vec<H256> = decoder.val_at(0)?;
    		let block_hashes: Vec<H256> = decoder.val_at(1)?;
    		let state_root: H256 = decoder.val_at(2)?;
    		let block_number: u64 = decoder.val_at(3)?;
    		let block_hash: H256 = decoder.val_at(4)?;

    		Ok(ManifestData {
    			state_hashes: state_hashes,
    			block_hashes: block_hashes,
    			state_root: state_root,
    			block_number: block_number,
    			block_hash: block_hash,
    		})
    	}
    }

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