74 lines
2.0 KiB
Rust
74 lines
2.0 KiB
Rust
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
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// This file is part of Parity Ethereum.
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// Parity Ethereum 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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// Parity Ethereum 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 Parity Ethereum. If not, see <http://www.gnu.org/licenses/>.
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//! Epoch verifiers and transitions.
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use ethereum_types::H256;
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use rlp::{Encodable, Decodable, DecoderError, RlpStream, Rlp};
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/// A full epoch transition.
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#[derive(Debug, Clone)]
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pub struct Transition {
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/// Block hash at which the transition occurred.
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pub block_hash: H256,
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/// Block number at which the transition occurred.
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pub block_number: u64,
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/// "transition/epoch" proof from the engine combined with a finality proof.
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pub proof: Vec<u8>,
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}
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impl Encodable for Transition {
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fn rlp_append(&self, s: &mut RlpStream) {
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s.begin_list(3)
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.append(&self.block_hash)
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.append(&self.block_number)
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.append(&self.proof);
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}
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}
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impl Decodable for Transition {
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fn decode(rlp: &Rlp) -> Result<Self, DecoderError> {
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Ok(Transition {
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block_hash: rlp.val_at(0)?,
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block_number: rlp.val_at(1)?,
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proof: rlp.val_at(2)?,
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})
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}
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}
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/// An epoch transition pending a finality proof.
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/// Not all transitions need one.
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pub struct PendingTransition {
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/// "transition/epoch" proof from the engine.
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pub proof: Vec<u8>,
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}
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impl Encodable for PendingTransition {
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fn rlp_append(&self, s: &mut RlpStream) {
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s.append(&self.proof);
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}
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}
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impl Decodable for PendingTransition {
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fn decode(rlp: &Rlp) -> Result<Self, DecoderError> {
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Ok(PendingTransition {
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proof: rlp.as_val()?,
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})
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}
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}
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