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improvement: query and exit early for events that get immediately replaced

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This commit is contained in:
Greg Heartsfield 2023-01-30 18:02:40 -06:00
parent b6798f96b6
commit 71bdbfb425
1 changed files with 42 additions and 0 deletions
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42
src/repo/postgres.rs
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@ -62,6 +62,48 @@ impl NostrRepo for PostgresRepo {
e.delegated_by.as_ref().and_then(|d| hex::decode(d).ok());
let event_str = serde_json::to_string(&e).unwrap();
// determine if this event would be shadowed by an existing
// replaceable event or parameterized replaceable event.
if e.is_replaceable() {
let repl_count = sqlx::query(
"SELECT e.id FROM event e WHERE e.pub_key=? AND e.kind=? AND e.created_at >= ? LIMIT 1;")
.bind(&pubkey_blob)
.bind(e.kind as i64)
.bind(Utc.timestamp_opt(e.created_at as i64, 0).unwrap())
.fetch_optional(&mut tx)
.await?;
if repl_count.is_some() {
return Ok(0);
}
}
if let Some(d_tag) = e.distinct_param() {
let repl_count:i64;
if is_lower_hex(&d_tag) && (d_tag.len() % 2 == 0) {
repl_count = sqlx::query_scalar(
"SELECT count(*) AS count FROM event e LEFT JOIN tag t ON e.id=t.event_id WHERE e.pub_key=$1 AND e.kind=$2 AND t.name='d' AND t.value_hex=$3 AND e.created_at >= $4 LIMIT 1;")
.bind(hex::decode(&e.pubkey).ok())
.bind(e.kind as i64)
.bind(hex::decode(d_tag).ok())
.bind(Utc.timestamp_opt(e.created_at as i64, 0).unwrap())
.fetch_one(&mut tx)
.await?;
} else {
repl_count = sqlx::query_scalar(
"SELECT count(*) AS count FROM event e LEFT JOIN tag t ON e.id=t.event_id WHERE e.pub_key=$1 AND e.kind=$2 AND t.name='d' AND t.value=$3 AND e.created_at >= $4 LIMIT 1;")
.bind(hex::decode(&e.pubkey).ok())
.bind(e.kind as i64)
.bind(d_tag.as_bytes())
.bind(Utc.timestamp_opt(e.created_at as i64, 0).unwrap())
.fetch_one(&mut tx)
.await?;
}
// if any rows were returned, then some newer event with
// the same author/kind/tag value exist, and we can ignore
// this event.
if repl_count > 0 {
return Ok(0)
}
}
// ignore if the event hash is a duplicate.
let mut ins_count = sqlx::query(
r#"INSERT INTO "event"