5828ff1204
This is an implementation of a slasher that lives inside the BN and can be enabled via `lighthouse bn --slasher`. Features included in this PR: - [x] Detection of attester slashing conditions (double votes, surrounds existing, surrounded by existing) - [x] Integration into Lighthouse's attestation verification flow - [x] Detection of proposer slashing conditions - [x] Extraction of attestations from blocks as they are verified - [x] Compression of chunks - [x] Configurable history length - [x] Pruning of old attestations and blocks - [x] More tests Future work: * Focus on a slice of history separate from the most recent N epochs (e.g. epochs `current - K` to `current - M`) * Run out-of-process * Ingest attestations from the chain without a resync Design notes are here https://hackmd.io/@sproul/HJSEklmPL
62 lines
2.1 KiB
Rust
62 lines
2.1 KiB
Rust
use slasher::{
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test_utils::{block as test_block, logger, E},
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Config, Slasher,
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};
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use tempdir::TempDir;
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use types::{Epoch, EthSpec};
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#[test]
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fn empty_pruning() {
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let tempdir = TempDir::new("slasher").unwrap();
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let config = Config::new(tempdir.path().into());
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let slasher = Slasher::<E>::open(config.clone(), logger()).unwrap();
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slasher.prune_database(Epoch::new(0)).unwrap();
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}
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#[test]
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fn block_pruning() {
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let slots_per_epoch = E::slots_per_epoch();
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let tempdir = TempDir::new("slasher").unwrap();
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let mut config = Config::new(tempdir.path().into());
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config.chunk_size = 2;
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config.history_length = 2;
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let slasher = Slasher::<E>::open(config.clone(), logger()).unwrap();
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let current_epoch = Epoch::from(2 * config.history_length);
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// Pruning the empty database should be safe.
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slasher.prune_database(Epoch::new(0)).unwrap();
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slasher.prune_database(current_epoch).unwrap();
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// Add blocks in excess of the history length and prune them away.
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let proposer_index = 100_000; // high to check sorting by slot
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for slot in 1..=current_epoch.as_u64() * slots_per_epoch {
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slasher.accept_block_header(test_block(slot, proposer_index, 0));
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}
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slasher.process_queued(current_epoch).unwrap();
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slasher.prune_database(current_epoch).unwrap();
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// Add more conflicting blocks, and check that only the ones within the non-pruned
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// section are detected as slashable.
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for slot in 1..=current_epoch.as_u64() * slots_per_epoch {
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slasher.accept_block_header(test_block(slot, proposer_index, 1));
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}
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slasher.process_queued(current_epoch).unwrap();
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let proposer_slashings = slasher.get_proposer_slashings();
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// Check number of proposer slashings, accounting for single block in current epoch.
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assert_eq!(
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proposer_slashings.len(),
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(config.history_length - 1) * slots_per_epoch as usize + 1
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);
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// Check epochs of all slashings are from within range.
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assert!(proposer_slashings.iter().all(|slashing| slashing
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.signed_header_1
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.message
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.slot
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.epoch(slots_per_epoch)
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> current_epoch - config.history_length as u64));
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}
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