41 lines
1.5 KiB
Rust
41 lines
1.5 KiB
Rust
// Copyright 2015-2020 Parity Technologies (UK) Ltd.
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// This file is part of OpenEthereum.
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// OpenEthereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// OpenEthereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with OpenEthereum. If not, see <http://www.gnu.org/licenses/>.
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//! Indication of how secure the chain is.
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use crate::BlockNumber;
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/// Indication of how secure the chain is.
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#[derive(Debug, PartialEq, Copy, Clone, Hash, Eq)]
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pub enum SecurityLevel {
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/// All blocks from genesis to chain head are known to have valid state transitions and PoW.
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FullState,
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/// All blocks from genesis to chain head are known to have a valid PoW.
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FullProofOfWork,
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/// Some recent headers (the argument) are known to have a valid PoW.
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PartialProofOfWork(BlockNumber),
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}
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impl SecurityLevel {
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/// `true` for `FullPoW`/`FullState`.
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pub fn is_full(&self) -> bool {
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match *self {
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SecurityLevel::FullState | SecurityLevel::FullProofOfWork => true,
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_ => false,
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}
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}
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}
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