97 lines
3.1 KiB
Rust
97 lines
3.1 KiB
Rust
// Copyright 2015, 2016 Ethcore (UK) Ltd.
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// This file is part of Parity.
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// Parity 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 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. If not, see <http://www.gnu.org/licenses/>.
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use util::numbers::{U256,H256};
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use header::BlockNumber;
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use util::bytes::{FromRawBytesVariable, FromBytesError, ToBytesWithMap};
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/// Brief info about inserted block.
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#[derive(Clone)]
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pub struct BlockInfo {
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/// Block hash.
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pub hash: H256,
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/// Block number.
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pub number: BlockNumber,
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/// Total block difficulty.
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pub total_difficulty: U256,
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/// Block location in blockchain.
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pub location: BlockLocation
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}
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/// Describes location of newly inserted block.
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#[derive(Clone)]
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pub enum BlockLocation {
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/// It's part of the canon chain.
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CanonChain,
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/// It's not a part of the canon chain.
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Branch,
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/// It's part of the fork which should become canon chain,
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/// because it's total difficulty is higher than current
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/// canon chain difficulty.
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BranchBecomingCanonChain(BranchBecomingCanonChainData),
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}
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#[derive(Clone)]
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pub struct BranchBecomingCanonChainData {
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/// Hash of the newest common ancestor with old canon chain.
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pub ancestor: H256,
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/// Hashes of the blocks between ancestor and this block.
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pub enacted: Vec<H256>,
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/// Hashes of the blocks which were invalidated.
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pub retracted: Vec<H256>,
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}
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impl FromRawBytesVariable for BranchBecomingCanonChainData {
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fn from_bytes_variable(bytes: &[u8]) -> Result<BranchBecomingCanonChainData, FromBytesError> {
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type Tuple = (Vec<H256>, Vec<H256>, H256);
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let (enacted, retracted, ancestor) = try!(Tuple::from_bytes_variable(bytes));
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Ok(BranchBecomingCanonChainData { ancestor: ancestor, enacted: enacted, retracted: retracted })
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}
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}
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impl FromRawBytesVariable for BlockLocation {
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fn from_bytes_variable(bytes: &[u8]) -> Result<BlockLocation, FromBytesError> {
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match bytes[0] {
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0 => Ok(BlockLocation::CanonChain),
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1 => Ok(BlockLocation::Branch),
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2 => Ok(BlockLocation::BranchBecomingCanonChain(
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try!(BranchBecomingCanonChainData::from_bytes_variable(&bytes[1..bytes.len()])))),
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_ => Err(FromBytesError::UnknownMarker)
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}
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}
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}
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impl ToBytesWithMap for BranchBecomingCanonChainData {
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fn to_bytes_map(&self) -> Vec<u8> {
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(&self.enacted, &self.retracted, &self.ancestor).to_bytes_map()
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}
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}
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impl ToBytesWithMap for BlockLocation {
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fn to_bytes_map(&self) -> Vec<u8> {
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match *self {
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BlockLocation::CanonChain => vec![0u8],
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BlockLocation::Branch => vec![1u8],
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BlockLocation::BranchBecomingCanonChain(ref data) => {
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let mut bytes = (&data.enacted, &data.retracted, &data.ancestor).to_bytes_map();
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bytes.insert(0, 2u8);
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bytes
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}
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}
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}
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}
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