openethereum/src/log_entry.rs
2016-01-19 17:02:01 +01:00

80 lines
2.2 KiB
Rust

use util::*;
use basic_types::LogBloom;
/// A single log's entry.
#[derive(Debug,PartialEq,Eq)]
pub struct LogEntry {
/// TODO [Gav Wood] Please document me
pub address: Address,
/// TODO [Gav Wood] Please document me
pub topics: Vec<H256>,
/// TODO [Gav Wood] Please document me
pub data: Bytes,
}
impl RlpStandard for LogEntry {
fn rlp_append(&self, s: &mut RlpStream) {
s.append_list(3);
s.append(&self.address);
s.append(&self.topics);
s.append(&self.data);
}
}
impl LogEntry {
/// Create a new log entry.
pub fn new(address: Address, topics: Vec<H256>, data: Bytes) -> LogEntry {
LogEntry {
address: address,
topics: topics,
data: data
}
}
/// Returns reference to address.
pub fn address(&self) -> &Address {
&self.address
}
/// Returns reference to topics.
pub fn topics(&self) -> &Vec<H256> {
&self.topics
}
/// Returns reference to data.
pub fn data(&self) -> &Bytes {
&self.data
}
/// Calculates the bloom of this log entry.
pub fn bloom(&self) -> LogBloom {
self.topics.iter().fold(LogBloom::from_bloomed(&self.address.sha3()), |b, t| b.with_bloomed(&t.sha3()))
}
}
impl FromJson for LogEntry {
/// Convert given JSON object to a LogEntry.
fn from_json(json: &Json) -> LogEntry {
// TODO: check bloom.
LogEntry {
address: xjson!(&json["address"]),
topics: xjson!(&json["topics"]),
data: xjson!(&json["data"]),
}
}
}
#[cfg(test)]
mod tests {
use util::*;
use super::LogEntry;
#[test]
fn test_empty_log_bloom() {
let bloom = H2048::from_str("00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000").unwrap();
let address = Address::from_str("0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6").unwrap();
let log = LogEntry::new(address, vec![], vec![]);
assert_eq!(log.bloom(), bloom);
}
}