df02639b71
## Issue Addressed
Closes https://github.com/sigp/lighthouse/issues/2112
Closes https://github.com/sigp/lighthouse/issues/1861
## Proposed Changes
Collect attestations by validator index in the slasher, and use the magic of reference counting to automatically discard redundant attestations. This results in us storing only 1-2% of the attestations observed when subscribed to all subnets, which carries over to a 50-100x reduction in data stored 🎉
## Additional Info
There's some nuance to the configuration of the `slot-offset`. It has a profound effect on the effictiveness of de-duplication, see the docs added to the book for an explanation: 5442e695e5/book/src/slasher.md (slot-offset)
67 lines
2.0 KiB
Rust
67 lines
2.0 KiB
Rust
#![deny(missing_debug_implementations)]
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mod array;
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mod attestation_queue;
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mod attester_record;
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mod batch_stats;
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mod block_queue;
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pub mod config;
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mod database;
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mod error;
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pub mod metrics;
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mod migrate;
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mod slasher;
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pub mod test_utils;
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mod utils;
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pub use crate::slasher::Slasher;
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pub use attestation_queue::{AttestationBatch, AttestationQueue, SimpleBatch};
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pub use attester_record::{AttesterRecord, IndexedAttesterRecord};
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pub use block_queue::BlockQueue;
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pub use config::Config;
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pub use database::SlasherDB;
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pub use error::Error;
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use types::{AttesterSlashing, EthSpec, IndexedAttestation, ProposerSlashing};
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#[derive(Debug, PartialEq)]
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pub enum AttesterSlashingStatus<E: EthSpec> {
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NotSlashable,
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/// A weird outcome that can occur when we go to lookup an attestation by its target
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/// epoch for a surround slashing, but find a different attestation -- indicating that
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/// the validator has already been caught double voting.
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AlreadyDoubleVoted,
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DoubleVote(Box<IndexedAttestation<E>>),
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SurroundsExisting(Box<IndexedAttestation<E>>),
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SurroundedByExisting(Box<IndexedAttestation<E>>),
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}
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#[derive(Debug, PartialEq)]
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pub enum ProposerSlashingStatus {
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NotSlashable,
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DoubleVote(Box<ProposerSlashing>),
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}
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impl<E: EthSpec> AttesterSlashingStatus<E> {
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pub fn into_slashing(
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self,
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new_attestation: &IndexedAttestation<E>,
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) -> Option<AttesterSlashing<E>> {
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use AttesterSlashingStatus::*;
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// The surrounding attestation must be in `attestation_1` to be valid.
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match self {
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NotSlashable => None,
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AlreadyDoubleVoted => None,
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DoubleVote(existing) | SurroundedByExisting(existing) => Some(AttesterSlashing {
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attestation_1: *existing,
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attestation_2: new_attestation.clone(),
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}),
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SurroundsExisting(existing) => Some(AttesterSlashing {
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attestation_1: new_attestation.clone(),
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attestation_2: *existing,
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}),
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}
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}
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}
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