openethereum/ethcore/src/client/trace.rs

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//! Bridge between Tracedb and Blockchain.
use util::{H256};
use header::BlockNumber;
use trace::DatabaseExtras as TraceDatabaseExtras;
use blockchain::{BlockChain, BlockProvider};
use blockchain::extras::TransactionAddress;
pub use types::trace_filter::Filter;
impl TraceDatabaseExtras for BlockChain {
fn block_hash(&self, block_number: BlockNumber) -> Option<H256> {
(self as &BlockProvider).block_hash(block_number)
}
fn transaction_hash(&self, block_number: BlockNumber, tx_position: usize) -> Option<H256> {
(self as &BlockProvider).block_hash(block_number)
.and_then(|block_hash| {
let tx_address = TransactionAddress {
block_hash: block_hash,
index: tx_position
};
self.transaction(&tx_address)
})
.map(|tx| tx.hash())
}
}