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[verify] Cache txs to avoid multiple db/network lookups

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This commit is contained in:
Alekos Filini 2021-06-18 13:13:45 +02:00
parent 7873dd5e40
commit a67aca32c0
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GPG Key ID: 431401E4A4530061
1 changed files with 9 additions and 1 deletions
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10
src/wallet/verify.rs
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@ -9,6 +9,7 @@
// You may not use this file except in accordance with one or both of these // You may not use this file except in accordance with one or both of these
// licenses. // licenses.
use std::collections::HashMap;
use std::fmt; use std::fmt;
use bitcoin::consensus::serialize; use bitcoin::consensus::serialize;
@ -34,9 +35,12 @@ pub fn verify_tx<D: Database, B: Blockchain>(
log::debug!("Verifying {}", tx.txid()); log::debug!("Verifying {}", tx.txid());
let serialized_tx = serialize(tx); let serialized_tx = serialize(tx);
let mut tx_cache = HashMap::<_, Transaction>::new();
for (index, input) in tx.input.iter().enumerate() { for (index, input) in tx.input.iter().enumerate() {
let prev_tx = if let Some(prev_tx) = database.get_raw_tx(&input.previous_output.txid)? { let prev_tx = if let Some(prev_tx) = tx_cache.get(&input.previous_output.txid) {
prev_tx.clone()
} else if let Some(prev_tx) = database.get_raw_tx(&input.previous_output.txid)? {
prev_tx prev_tx
} else if let Some(prev_tx) = blockchain.get_tx(&input.previous_output.txid)? { } else if let Some(prev_tx) = blockchain.get_tx(&input.previous_output.txid)? {
prev_tx prev_tx
@ -55,6 +59,10 @@ pub fn verify_tx<D: Database, B: Blockchain>(
&serialized_tx, &serialized_tx,
index, index,
)?; )?;
// Since we have a local cache we might as well cache stuff from the db, as it will very
// likely decrease latency compared to reading from disk or performing an SQL query.
tx_cache.insert(prev_tx.txid(), prev_tx);
} }
Ok(()) Ok(())