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49 lines
1.3 KiB
49 lines
1.3 KiB
extern crate electrs;
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extern crate hex;
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extern crate log;
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use electrs::{config::Config, store::DBStore};
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fn max_collision(store: DBStore, prefix: &[u8]) {
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let prefix_len = prefix.len();
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let mut prev: Option<Vec<u8>> = None;
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let mut collision_max = 0;
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for row in store.iter_scan(prefix) {
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assert!(row.key.starts_with(prefix));
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if let Some(prev) = prev {
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let collision_len = prev
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.iter()
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.zip(row.key.iter())
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.take_while(|(a, b)| a == b)
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.count();
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if collision_len > collision_max {
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eprintln!(
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"{} bytes collision found:\n{:?}\n{:?}\n",
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collision_len - prefix_len,
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revhex(&prev[prefix_len..]),
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revhex(&row.key[prefix_len..]),
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);
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collision_max = collision_len;
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}
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}
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prev = Some(row.key.to_vec());
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}
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}
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fn revhex(value: &[u8]) -> String {
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hex::encode(&value.iter().cloned().rev().collect::<Vec<u8>>())
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}
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fn run(config: Config) {
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if !config.db_path.exists() {
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panic!("DB {:?} must exist when running this tool!", config.db_path);
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}
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let store = DBStore::open(&config.db_path, /*low_memory=*/ false);
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max_collision(store, b"T");
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}
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fn main() {
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run(Config::from_args());
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}
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