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Merge pull request #645 from ethcore/import_route
blockchain import_route
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// Copyright 2015, 2016 Ethcore (UK) Ltd. | ||
// This file is part of Parity. | ||
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// 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. | ||
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// 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. | ||
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// You should have received a copy of the GNU General Public License | ||
// along with Parity. If not, see <http://www.gnu.org/licenses/>. | ||
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//! Import route. | ||
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use util::hash::H256; | ||
use blockchain::block_info::{BlockInfo, BlockLocation}; | ||
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/// Import route for newly inserted block. | ||
#[derive(Debug, PartialEq)] | ||
pub struct ImportRoute { | ||
/// Blocks that were invalidated by new block. | ||
pub retracted: Vec<H256>, | ||
/// Blocks that were validated by new block. | ||
pub enacted: Vec<H256>, | ||
} | ||
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impl ImportRoute { | ||
pub fn none() -> Self { | ||
ImportRoute { | ||
retracted: vec![], | ||
enacted: vec![], | ||
} | ||
} | ||
} | ||
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impl From<BlockInfo> for ImportRoute { | ||
fn from(info: BlockInfo) -> ImportRoute { | ||
match info.location { | ||
BlockLocation::CanonChain => ImportRoute { | ||
retracted: vec![], | ||
enacted: vec![info.hash], | ||
}, | ||
BlockLocation::Branch => ImportRoute::none(), | ||
BlockLocation::BranchBecomingCanonChain { mut enacted, retracted, .. } => { | ||
enacted.push(info.hash); | ||
ImportRoute { | ||
retracted: retracted, | ||
enacted: enacted, | ||
} | ||
} | ||
} | ||
} | ||
} | ||
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#[cfg(test)] | ||
mod tests { | ||
use util::hash::H256; | ||
use util::numbers::U256; | ||
use blockchain::block_info::{BlockInfo, BlockLocation}; | ||
use blockchain::ImportRoute; | ||
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#[test] | ||
fn import_route_none() { | ||
assert_eq!(ImportRoute::none(), ImportRoute { | ||
enacted: vec![], | ||
retracted: vec![], | ||
}); | ||
} | ||
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#[test] | ||
fn import_route_branch() { | ||
let info = BlockInfo { | ||
hash: H256::from(U256::from(1)), | ||
number: 0, | ||
total_difficulty: U256::from(0), | ||
location: BlockLocation::Branch, | ||
}; | ||
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assert_eq!(ImportRoute::from(info), ImportRoute::none()); | ||
} | ||
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#[test] | ||
fn import_route_canon_chain() { | ||
let info = BlockInfo { | ||
hash: H256::from(U256::from(1)), | ||
number: 0, | ||
total_difficulty: U256::from(0), | ||
location: BlockLocation::CanonChain, | ||
}; | ||
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assert_eq!(ImportRoute::from(info), ImportRoute { | ||
retracted: vec![], | ||
enacted: vec![H256::from(U256::from(1))], | ||
}); | ||
} | ||
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#[test] | ||
fn import_route_branch_becoming_canon_chain() { | ||
let info = BlockInfo { | ||
hash: H256::from(U256::from(2)), | ||
number: 0, | ||
total_difficulty: U256::from(0), | ||
location: BlockLocation::BranchBecomingCanonChain { | ||
ancestor: H256::from(U256::from(0)), | ||
enacted: vec![H256::from(U256::from(1))], | ||
retracted: vec![H256::from(U256::from(3)), H256::from(U256::from(4))], | ||
} | ||
}; | ||
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assert_eq!(ImportRoute::from(info), ImportRoute { | ||
retracted: vec![H256::from(U256::from(3)), H256::from(U256::from(4))], | ||
enacted: vec![H256::from(U256::from(1)), H256::from(U256::from(2))], | ||
}); | ||
} | ||
} |
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