530 lines
15 KiB
Rust
530 lines
15 KiB
Rust
#![cfg(not(debug_assertions))]
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#[macro_use]
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extern crate lazy_static;
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use beacon_chain::AttestationProcessingOutcome;
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use beacon_chain::{
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test_utils::{
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AttestationStrategy, BeaconChainHarness, BlockStrategy, HarnessType, PersistedBeaconChain,
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BEACON_CHAIN_DB_KEY,
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},
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BlockProcessingOutcome,
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};
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use state_processing::{
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per_slot_processing, per_slot_processing::Error as SlotProcessingError, EpochProcessingError,
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};
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use store::Store;
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use types::{BeaconStateError, EthSpec, Hash256, Keypair, MinimalEthSpec, RelativeEpoch, Slot};
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// Should ideally be divisible by 3.
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pub const VALIDATOR_COUNT: usize = 24;
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lazy_static! {
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/// A cached set of keys.
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static ref KEYPAIRS: Vec<Keypair> = types::test_utils::generate_deterministic_keypairs(VALIDATOR_COUNT);
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}
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fn get_harness(validator_count: usize) -> BeaconChainHarness<HarnessType<MinimalEthSpec>> {
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let harness = BeaconChainHarness::new(MinimalEthSpec, KEYPAIRS[0..validator_count].to_vec());
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harness.advance_slot();
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harness
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}
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#[test]
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fn massive_skips() {
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let harness = get_harness(8);
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let spec = &MinimalEthSpec::default_spec();
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let mut state = harness.chain.head().beacon_state;
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// Run per_slot_processing until it returns an error.
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let error = loop {
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match per_slot_processing(&mut state, spec) {
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Ok(_) => continue,
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Err(e) => break e,
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}
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};
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assert!(state.slot > 1, "the state should skip at least one slot");
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assert_eq!(
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error,
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SlotProcessingError::EpochProcessingError(EpochProcessingError::BeaconStateError(
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BeaconStateError::InsufficientValidators
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)),
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"should return error indicating that validators have been slashed out"
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)
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}
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#[test]
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fn iterators() {
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let num_blocks_produced = MinimalEthSpec::slots_per_epoch() * 2 - 1;
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let harness = get_harness(VALIDATOR_COUNT);
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harness.extend_chain(
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num_blocks_produced as usize,
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BlockStrategy::OnCanonicalHead,
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// No need to produce attestations for this test.
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AttestationStrategy::SomeValidators(vec![]),
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);
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let block_roots: Vec<(Hash256, Slot)> = harness.chain.rev_iter_block_roots().collect();
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let state_roots: Vec<(Hash256, Slot)> = harness.chain.rev_iter_state_roots().collect();
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assert_eq!(
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block_roots.len(),
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state_roots.len(),
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"should be an equal amount of block and state roots"
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);
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assert!(
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block_roots.iter().any(|(_root, slot)| *slot == 0),
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"should contain genesis block root"
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);
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assert!(
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state_roots.iter().any(|(_root, slot)| *slot == 0),
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"should contain genesis state root"
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);
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assert_eq!(
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block_roots.len(),
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num_blocks_produced as usize + 1,
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"should contain all produced blocks, plus the genesis block"
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);
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block_roots.windows(2).for_each(|x| {
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assert_eq!(
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x[1].1,
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x[0].1 - 1,
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"block root slots should be decreasing by one"
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)
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});
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state_roots.windows(2).for_each(|x| {
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assert_eq!(
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x[1].1,
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x[0].1 - 1,
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"state root slots should be decreasing by one"
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)
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});
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let head = &harness.chain.head();
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assert_eq!(
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*block_roots.first().expect("should have some block roots"),
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(head.beacon_block_root, head.beacon_block.slot),
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"first block root and slot should be for the head block"
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);
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assert_eq!(
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*state_roots.first().expect("should have some state roots"),
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(head.beacon_state_root, head.beacon_state.slot),
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"first state root and slot should be for the head state"
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);
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}
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#[test]
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fn chooses_fork() {
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let harness = get_harness(VALIDATOR_COUNT);
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let two_thirds = (VALIDATOR_COUNT / 3) * 2;
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let delay = MinimalEthSpec::default_spec().min_attestation_inclusion_delay as usize;
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let honest_validators: Vec<usize> = (0..two_thirds).collect();
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let faulty_validators: Vec<usize> = (two_thirds..VALIDATOR_COUNT).collect();
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let initial_blocks = delay + 1;
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let honest_fork_blocks = delay + 1;
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let faulty_fork_blocks = delay + 2;
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// Build an initial chain where all validators agree.
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harness.extend_chain(
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initial_blocks,
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BlockStrategy::OnCanonicalHead,
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AttestationStrategy::AllValidators,
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);
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let (honest_head, faulty_head) = harness.generate_two_forks_by_skipping_a_block(
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&honest_validators,
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&faulty_validators,
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honest_fork_blocks,
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faulty_fork_blocks,
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);
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assert!(honest_head != faulty_head, "forks should be distinct");
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let state = &harness.chain.head().beacon_state;
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assert_eq!(
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state.slot,
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Slot::from(initial_blocks + honest_fork_blocks),
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"head should be at the current slot"
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);
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assert_eq!(
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harness.chain.head().beacon_block_root,
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honest_head,
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"the honest chain should be the canonical chain"
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);
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}
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#[test]
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fn finalizes_with_full_participation() {
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let num_blocks_produced = MinimalEthSpec::slots_per_epoch() * 5;
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let harness = get_harness(VALIDATOR_COUNT);
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harness.extend_chain(
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num_blocks_produced as usize,
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BlockStrategy::OnCanonicalHead,
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AttestationStrategy::AllValidators,
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);
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let state = &harness.chain.head().beacon_state;
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assert_eq!(
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state.slot, num_blocks_produced,
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"head should be at the current slot"
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);
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assert_eq!(
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state.current_epoch(),
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num_blocks_produced / MinimalEthSpec::slots_per_epoch(),
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"head should be at the expected epoch"
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);
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assert_eq!(
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state.current_justified_checkpoint.epoch,
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state.current_epoch() - 1,
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"the head should be justified one behind the current epoch"
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);
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assert_eq!(
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state.finalized_checkpoint.epoch,
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state.current_epoch() - 2,
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"the head should be finalized two behind the current epoch"
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);
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}
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#[test]
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fn finalizes_with_two_thirds_participation() {
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let num_blocks_produced = MinimalEthSpec::slots_per_epoch() * 5;
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let harness = get_harness(VALIDATOR_COUNT);
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let two_thirds = (VALIDATOR_COUNT / 3) * 2;
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let attesters = (0..two_thirds).collect();
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harness.extend_chain(
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num_blocks_produced as usize,
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BlockStrategy::OnCanonicalHead,
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AttestationStrategy::SomeValidators(attesters),
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);
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let state = &harness.chain.head().beacon_state;
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assert_eq!(
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state.slot, num_blocks_produced,
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"head should be at the current slot"
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);
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assert_eq!(
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state.current_epoch(),
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num_blocks_produced / MinimalEthSpec::slots_per_epoch(),
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"head should be at the expected epoch"
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);
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// Note: the 2/3rds tests are not justifying the immediately prior epochs because the
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// `MIN_ATTESTATION_INCLUSION_DELAY` is preventing an adequate number of attestations being
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// included in blocks during that epoch.
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assert_eq!(
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state.current_justified_checkpoint.epoch,
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state.current_epoch() - 2,
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"the head should be justified two behind the current epoch"
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);
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assert_eq!(
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state.finalized_checkpoint.epoch,
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state.current_epoch() - 4,
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"the head should be finalized three behind the current epoch"
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);
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}
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#[test]
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fn does_not_finalize_with_less_than_two_thirds_participation() {
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let num_blocks_produced = MinimalEthSpec::slots_per_epoch() * 5;
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let harness = get_harness(VALIDATOR_COUNT);
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let two_thirds = (VALIDATOR_COUNT / 3) * 2;
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let less_than_two_thirds = two_thirds - 1;
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let attesters = (0..less_than_two_thirds).collect();
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harness.extend_chain(
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num_blocks_produced as usize,
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BlockStrategy::OnCanonicalHead,
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AttestationStrategy::SomeValidators(attesters),
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);
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let state = &harness.chain.head().beacon_state;
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assert_eq!(
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state.slot, num_blocks_produced,
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"head should be at the current slot"
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);
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assert_eq!(
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state.current_epoch(),
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num_blocks_produced / MinimalEthSpec::slots_per_epoch(),
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"head should be at the expected epoch"
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);
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assert_eq!(
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state.current_justified_checkpoint.epoch, 0,
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"no epoch should have been justified"
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);
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assert_eq!(
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state.finalized_checkpoint.epoch, 0,
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"no epoch should have been finalized"
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);
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}
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#[test]
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fn does_not_finalize_without_attestation() {
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let num_blocks_produced = MinimalEthSpec::slots_per_epoch() * 5;
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let harness = get_harness(VALIDATOR_COUNT);
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harness.extend_chain(
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num_blocks_produced as usize,
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BlockStrategy::OnCanonicalHead,
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AttestationStrategy::SomeValidators(vec![]),
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);
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let state = &harness.chain.head().beacon_state;
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assert_eq!(
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state.slot, num_blocks_produced,
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"head should be at the current slot"
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);
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assert_eq!(
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state.current_epoch(),
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num_blocks_produced / MinimalEthSpec::slots_per_epoch(),
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"head should be at the expected epoch"
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);
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assert_eq!(
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state.current_justified_checkpoint.epoch, 0,
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"no epoch should have been justified"
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);
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assert_eq!(
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state.finalized_checkpoint.epoch, 0,
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"no epoch should have been finalized"
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);
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}
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#[test]
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fn roundtrip_operation_pool() {
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let num_blocks_produced = MinimalEthSpec::slots_per_epoch() * 5;
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let harness = get_harness(VALIDATOR_COUNT);
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// Add some attestations
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harness.extend_chain(
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num_blocks_produced as usize,
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BlockStrategy::OnCanonicalHead,
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AttestationStrategy::AllValidators,
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);
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assert!(harness.chain.op_pool.num_attestations() > 0);
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// TODO: could add some other operations
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harness.chain.persist().unwrap();
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let key = Hash256::from_slice(&BEACON_CHAIN_DB_KEY.as_bytes());
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let p: PersistedBeaconChain<HarnessType<MinimalEthSpec>> =
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harness.chain.store.get(&key).unwrap().unwrap();
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let restored_op_pool = p
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.op_pool
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.into_operation_pool(&p.canonical_head.beacon_state, &harness.spec);
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assert_eq!(harness.chain.op_pool, restored_op_pool);
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}
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#[test]
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fn free_attestations_added_to_fork_choice_some_none() {
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let num_blocks_produced = MinimalEthSpec::slots_per_epoch() / 2;
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let harness = get_harness(VALIDATOR_COUNT);
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harness.extend_chain(
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num_blocks_produced as usize,
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BlockStrategy::OnCanonicalHead,
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AttestationStrategy::AllValidators,
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);
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let state = &harness.chain.head().beacon_state;
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let fork_choice = &harness.chain.fork_choice;
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let validator_slots: Vec<(usize, Slot)> = (0..VALIDATOR_COUNT)
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.into_iter()
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.map(|validator_index| {
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let slot = state
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.get_attestation_duties(validator_index, RelativeEpoch::Current)
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.expect("should get attester duties")
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.unwrap()
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.slot;
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(validator_index, slot)
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})
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.collect();
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for (validator, slot) in validator_slots.clone() {
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let latest_message = fork_choice.latest_message(validator);
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if slot <= num_blocks_produced && slot != 0 {
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assert_eq!(
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latest_message.unwrap().1,
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slot,
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"Latest message slot for {} should be equal to slot {}.",
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validator,
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slot
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)
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} else {
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assert!(
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latest_message.is_none(),
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"Latest message slot should be None."
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)
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}
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}
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}
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#[test]
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fn attestations_with_increasing_slots() {
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let num_blocks_produced = MinimalEthSpec::slots_per_epoch() * 5;
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let harness = get_harness(VALIDATOR_COUNT);
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let mut attestations = vec![];
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for _ in 0..num_blocks_produced {
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harness.extend_chain(
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2,
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BlockStrategy::OnCanonicalHead,
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// Don't produce & include any attestations (we'll collect them later).
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AttestationStrategy::SomeValidators(vec![]),
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);
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attestations.append(&mut harness.get_free_attestations(
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&AttestationStrategy::AllValidators,
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&harness.chain.head().beacon_state,
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harness.chain.head().beacon_block_root,
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harness.chain.head().beacon_block.slot,
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));
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harness.advance_slot();
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}
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for attestation in attestations {
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assert_eq!(
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harness.chain.process_attestation(attestation),
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Ok(AttestationProcessingOutcome::Processed)
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)
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}
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}
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#[test]
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fn free_attestations_added_to_fork_choice_all_updated() {
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let num_blocks_produced = MinimalEthSpec::slots_per_epoch() * 2 - 1;
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let harness = get_harness(VALIDATOR_COUNT);
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harness.extend_chain(
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num_blocks_produced as usize,
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BlockStrategy::OnCanonicalHead,
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AttestationStrategy::AllValidators,
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);
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let state = &harness.chain.head().beacon_state;
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let fork_choice = &harness.chain.fork_choice;
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let validators: Vec<usize> = (0..VALIDATOR_COUNT).collect();
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let slots: Vec<Slot> = validators
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.iter()
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.map(|&v| {
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state
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.get_attestation_duties(v, RelativeEpoch::Current)
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.expect("should get attester duties")
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.unwrap()
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.slot
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})
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.collect();
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let validator_slots: Vec<(&usize, Slot)> = validators.iter().zip(slots).collect();
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for (validator, slot) in validator_slots {
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let latest_message = fork_choice.latest_message(*validator);
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assert_eq!(
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latest_message.unwrap().1,
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slot,
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"Latest message slot should be equal to attester duty."
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);
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if slot != num_blocks_produced {
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let block_root = state
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.get_block_root(slot)
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.expect("Should get block root at slot");
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assert_eq!(
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latest_message.unwrap().0,
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*block_root,
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"Latest message block root should be equal to block at slot."
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);
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}
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}
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}
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fn run_skip_slot_test(skip_slots: u64) {
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let num_validators = 8;
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let harness_a = get_harness(num_validators);
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let harness_b = get_harness(num_validators);
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for _ in 0..skip_slots {
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harness_a.advance_slot();
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harness_b.advance_slot();
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}
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harness_a.extend_chain(
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1,
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BlockStrategy::OnCanonicalHead,
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// No attestation required for test.
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AttestationStrategy::SomeValidators(vec![]),
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);
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assert_eq!(
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harness_a.chain.head().beacon_block.slot,
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Slot::new(skip_slots + 1)
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);
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assert_eq!(harness_b.chain.head().beacon_block.slot, Slot::new(0));
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assert_eq!(
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harness_b
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.chain
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.process_block(harness_a.chain.head().beacon_block.clone()),
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Ok(BlockProcessingOutcome::Processed {
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block_root: harness_a.chain.head().beacon_block_root
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})
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);
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harness_b
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.chain
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.fork_choice()
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.expect("should run fork choice");
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assert_eq!(
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harness_b.chain.head().beacon_block.slot,
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Slot::new(skip_slots + 1)
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);
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}
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#[test]
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fn produces_and_processes_with_genesis_skip_slots() {
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for i in 0..MinimalEthSpec::slots_per_epoch() * 4 {
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run_skip_slot_test(i)
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}
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}
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