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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/>. //! Blockhain info type definition use util::{U256, H256}; use header::BlockNumber; use types::security_level::SecurityLevel; /// Information about the blockchain gathered together. #[derive(Clone, Debug)] #[cfg_attr(feature = "ipc", binary)] pub struct BlockChainInfo { /// Blockchain difficulty. pub total_difficulty: U256, /// Block queue difficulty. pub pending_total_difficulty: U256, /// Genesis block hash. pub genesis_hash: H256, /// Best blockchain block hash. pub best_block_hash: H256, /// Best blockchain block number. pub best_block_number: BlockNumber, /// Best ancient block hash. pub ancient_block_hash: Option<H256>, /// Best ancient block number. pub ancient_block_number: Option<BlockNumber>, /// First block on the best sequence. pub first_block_hash: Option<H256>, /// Number of the first block on the best sequence. pub first_block_number: Option<BlockNumber>, } impl BlockChainInfo { /// Determine the security model for the current state. pub fn security_level(&self) -> SecurityLevel { // TODO: Detect SecurityLevel::FullState : https://github.com/ethcore/parity/issues/3834 if self.ancient_block_number.is_none() || self.first_block_number.is_none() { SecurityLevel::FullProofOfWork } else { SecurityLevel::PartialProofOfWork(self.best_block_number - self.first_block_number.expect("Guard condition means this is not none")) } } }