// Copyright 2015-2020 Parity Technologies (UK) Ltd.
// This file is part of OpenEthereum.

// OpenEthereum 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.

// OpenEthereum 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 OpenEthereum.  If not, see <http://www.gnu.org/licenses/>.

//! Null engine params deserialization.

use crate::uint::Uint;

/// Authority params deserialization.
#[derive(Debug, PartialEq, Deserialize)]
#[serde(deny_unknown_fields)]
#[serde(rename_all = "camelCase")]
pub struct NullEngineParams {
    /// Block reward.
    pub block_reward: Option<Uint>,
    /// Immediate finalization.
    pub immediate_finalization: Option<bool>,
}

/// Null engine descriptor
#[derive(Debug, PartialEq, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct NullEngine {
    /// Ethash params.
    pub params: NullEngineParams,
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::uint::Uint;
    use ethereum_types::U256;
    use serde_json;

    #[test]
    fn null_engine_deserialization() {
        let s = r#"{
			"params": {
				"blockReward": "0x0d"
			}
		}"#;

        let deserialized: NullEngine = serde_json::from_str(s).unwrap();
        assert_eq!(
            deserialized.params.block_reward,
            Some(Uint(U256::from(0x0d)))
        );
    }
}
