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// Copyright 2015-2018 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/>. //! Indication of how secure the chain is. use {BlockNumber}; /// Indication of how secure the chain is. #[derive(Debug, PartialEq, Copy, Clone, Hash, Eq)] pub enum SecurityLevel { /// All blocks from genesis to chain head are known to have valid state transitions and PoW. FullState, /// All blocks from genesis to chain head are known to have a valid PoW. FullProofOfWork, /// Some recent headers (the argument) are known to have a valid PoW. PartialProofOfWork(BlockNumber), } impl SecurityLevel { /// `true` for `FullPoW`/`FullState`. pub fn is_full(&self) -> bool { match *self { SecurityLevel::FullState | SecurityLevel::FullProofOfWork => true, _ => false, } } }