lighthouse/beacon_node/beacon_chain/tests/attestation_production.rs
2023-11-09 15:05:44 +11:00

253 lines
8.2 KiB
Rust

#![cfg(not(debug_assertions))]
use beacon_chain::block_verification_types::RpcBlock;
use beacon_chain::test_utils::{AttestationStrategy, BeaconChainHarness, BlockStrategy};
use beacon_chain::{StateSkipConfig, WhenSlotSkipped};
use lazy_static::lazy_static;
use std::sync::Arc;
use tree_hash::TreeHash;
use types::{AggregateSignature, EthSpec, Keypair, MainnetEthSpec, RelativeEpoch, Slot};
pub const VALIDATOR_COUNT: usize = 16;
lazy_static! {
/// A cached set of keys.
static ref KEYPAIRS: Vec<Keypair> = types::test_utils::generate_deterministic_keypairs(VALIDATOR_COUNT);
}
/// This test builds a chain that is just long enough to finalize an epoch then it produces an
/// attestation at each slot from genesis through to three epochs past the head.
///
/// It checks the produced attestation against some locally computed values.
#[tokio::test]
async fn produces_attestations() {
let num_blocks_produced = MainnetEthSpec::slots_per_epoch() * 4;
let additional_slots_tested = MainnetEthSpec::slots_per_epoch() * 3;
let harness = BeaconChainHarness::builder(MainnetEthSpec)
.default_spec()
.keypairs(KEYPAIRS[..].to_vec())
.fresh_ephemeral_store()
.mock_execution_layer()
.build();
let chain = &harness.chain;
// Test all valid committee indices for all slots in the chain.
// for slot in 0..=current_slot.as_u64() + MainnetEthSpec::slots_per_epoch() * 3 {
for slot in 0..=num_blocks_produced + additional_slots_tested {
if slot > 0 && slot <= num_blocks_produced {
harness.advance_slot();
harness
.extend_chain(
1,
BlockStrategy::OnCanonicalHead,
AttestationStrategy::AllValidators,
)
.await;
}
let slot = Slot::from(slot);
let mut state = chain
.state_at_slot(slot, StateSkipConfig::WithStateRoots)
.expect("should get state");
let block_slot = if slot <= num_blocks_produced {
slot
} else {
Slot::from(num_blocks_produced)
};
let blinded_block = chain
.block_at_slot(block_slot, WhenSlotSkipped::Prev)
.expect("should get block")
.expect("block should not be skipped");
let block_root = blinded_block.message().tree_hash_root();
let block = chain
.store
.make_full_block(&block_root, blinded_block)
.unwrap();
let blobs = chain.get_blobs(&block_root).unwrap();
let epoch_boundary_slot = state
.current_epoch()
.start_slot(MainnetEthSpec::slots_per_epoch());
let target_root = if state.slot() == epoch_boundary_slot {
block_root
} else {
*state
.get_block_root(epoch_boundary_slot)
.expect("should get target block root")
};
state
.build_committee_cache(RelativeEpoch::Current, &harness.chain.spec)
.unwrap();
let committee_cache = state
.committee_cache(RelativeEpoch::Current)
.expect("should get committee_cache");
let committee_count = committee_cache.committees_per_slot();
for index in 0..committee_count {
let committee_len = committee_cache
.get_beacon_committee(slot, index)
.expect("should get committee for slot")
.committee
.len();
let attestation = chain
.produce_unaggregated_attestation(slot, index)
.expect("should produce attestation");
let data = &attestation.data;
assert_eq!(
attestation.aggregation_bits.len(),
committee_len,
"bad committee len"
);
assert!(
attestation.aggregation_bits.is_zero(),
"some committee bits are set"
);
assert_eq!(
attestation.signature,
AggregateSignature::empty(),
"bad signature"
);
assert_eq!(data.index, index, "bad index");
assert_eq!(data.slot, slot, "bad slot");
assert_eq!(data.beacon_block_root, block_root, "bad block root");
assert_eq!(
data.source,
state.current_justified_checkpoint(),
"bad source"
);
assert_eq!(
data.source,
state.current_justified_checkpoint(),
"bad source"
);
assert_eq!(data.target.epoch, state.current_epoch(), "bad target epoch");
assert_eq!(data.target.root, target_root, "bad target root");
let rpc_block =
RpcBlock::<MainnetEthSpec>::new(None, Arc::new(block.clone()), Some(blobs.clone()))
.unwrap();
let beacon_chain::data_availability_checker::MaybeAvailableBlock::Available(
available_block,
) = chain
.data_availability_checker
.verify_kzg_for_rpc_block(rpc_block)
.unwrap()
else {
panic!("block should be available")
};
let early_attestation = {
let proto_block = chain
.canonical_head
.fork_choice_read_lock()
.get_block(&block_root)
.unwrap();
chain
.early_attester_cache
.add_head_block(
block_root,
available_block,
proto_block,
&state,
&chain.spec,
)
.unwrap();
chain
.early_attester_cache
.try_attest(slot, index, &chain.spec)
.unwrap()
.unwrap()
};
assert_eq!(
attestation, early_attestation,
"early attester cache inconsistent"
);
}
}
}
/// Ensures that the early attester cache wont create an attestation to a block in a later slot than
/// the one requested.
#[tokio::test]
async fn early_attester_cache_old_request() {
let harness = BeaconChainHarness::builder(MainnetEthSpec)
.default_spec()
.keypairs(KEYPAIRS[..].to_vec())
.fresh_ephemeral_store()
.mock_execution_layer()
.build();
harness.advance_slot();
harness
.extend_chain(
2,
BlockStrategy::OnCanonicalHead,
AttestationStrategy::AllValidators,
)
.await;
let head = harness.chain.head_snapshot();
assert_eq!(head.beacon_block.slot(), 2);
let head_proto_block = harness
.chain
.canonical_head
.fork_choice_read_lock()
.get_block(&head.beacon_block_root)
.unwrap();
let head_blobs = harness
.chain
.get_blobs(&head.beacon_block_root)
.expect("should get blobs");
let rpc_block =
RpcBlock::<MainnetEthSpec>::new(None, head.beacon_block.clone(), Some(head_blobs)).unwrap();
let beacon_chain::data_availability_checker::MaybeAvailableBlock::Available(available_block) =
harness
.chain
.data_availability_checker
.verify_kzg_for_rpc_block(rpc_block)
.unwrap()
else {
panic!("block should be available")
};
harness
.chain
.early_attester_cache
.add_head_block(
head.beacon_block_root,
available_block,
head_proto_block,
&head.beacon_state,
&harness.chain.spec,
)
.unwrap();
let attest_slot = head.beacon_block.slot() - 1;
let attestation = harness
.chain
.produce_unaggregated_attestation(attest_slot, 0)
.unwrap();
assert_eq!(attestation.data.slot, attest_slot);
let attested_block = harness
.chain
.get_blinded_block(&attestation.data.beacon_block_root)
.unwrap()
.unwrap();
assert_eq!(attested_block.slot(), attest_slot);
}