107 lines
3.4 KiB
Rust
107 lines
3.4 KiB
Rust
// Copyright 2015-2017 Parity Technologies (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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//! Log entry type definition.
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use std::ops::Deref;
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use ethereum_types::{H256, Address, LogBloom};
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use bloomable::Bloomable;
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use bytes::Bytes;
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use hash::keccak;
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use heapsize::HeapSizeOf;
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use {BlockNumber};
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use ethjson;
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/// A record of execution for a `LOG` operation.
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#[derive(Default, Debug, Clone, PartialEq, Eq, RlpEncodable, RlpDecodable)]
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pub struct LogEntry {
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/// The address of the contract executing at the point of the `LOG` operation.
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pub address: Address,
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/// The topics associated with the `LOG` operation.
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pub topics: Vec<H256>,
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/// The data associated with the `LOG` operation.
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pub data: Bytes,
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}
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impl HeapSizeOf for LogEntry {
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fn heap_size_of_children(&self) -> usize {
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self.topics.heap_size_of_children() + self.data.heap_size_of_children()
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}
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}
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impl LogEntry {
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/// Calculates the bloom of this log entry.
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pub fn bloom(&self) -> LogBloom {
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self.topics.iter().fold(LogBloom::from_bloomed(&keccak(&self.address)), |b, t| b.with_bloomed(&keccak(t)))
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}
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}
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impl From<ethjson::state::Log> for LogEntry {
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fn from(l: ethjson::state::Log) -> Self {
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LogEntry {
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address: l.address.into(),
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topics: l.topics.into_iter().map(Into::into).collect(),
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data: l.data.into(),
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}
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}
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}
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/// Log localized in a blockchain.
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#[derive(Default, Debug, PartialEq, Clone)]
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pub struct LocalizedLogEntry {
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/// Plain log entry.
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pub entry: LogEntry,
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/// Block in which this log was created.
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pub block_hash: H256,
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/// Block number.
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pub block_number: BlockNumber,
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/// Hash of transaction in which this log was created.
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pub transaction_hash: H256,
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/// Index of transaction within block.
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pub transaction_index: usize,
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/// Log position in the block.
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pub log_index: usize,
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/// Log position in the transaction.
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pub transaction_log_index: usize,
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}
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impl Deref for LocalizedLogEntry {
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type Target = LogEntry;
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fn deref(&self) -> &Self::Target {
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&self.entry
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}
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}
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#[cfg(test)]
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mod tests {
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use ethereum_types::{LogBloom, Address};
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use super::LogEntry;
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#[test]
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fn test_empty_log_bloom() {
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let bloom = "00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000".parse::<LogBloom>().unwrap();
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let address = "0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6".parse::<Address>().unwrap();
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let log = LogEntry {
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address: address,
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topics: vec![],
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data: vec![]
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};
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assert_eq!(log.bloom(), bloom);
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}
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}
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