nimbus-eth2/tests/spec_block_processing/test_process_attestation.nim

119 lines
4.1 KiB
Nim

# beacon_chain
# Copyright (c) 2018 Status Research & Development GmbH
# Licensed and distributed under either of
# * MIT license (license terms in the root directory or at http://opensource.org/licenses/MIT).
# * Apache v2 license (license terms in the root directory or at http://www.apache.org/licenses/LICENSE-2.0).
# at your option. This file may not be copied, modified, or distributed except according to those terms.
# process_attestation (beaconstate.nim)
# https://github.com/ethereum/eth2.0-specs/blob/v0.8.1/specs/core/0_beacon-chain.md#attestations
# ---------------------------------------------------------------
{.used.}
import
# Standard library
unittest,
# shims 0.19.6
stew/objects, # import default
# Specs
../../beacon_chain/spec/[beaconstate, datatypes, helpers, validator],
# Mock helpers
../mocking/[mock_genesis, mock_attestations, mock_state, mock_blocks],
../testutil
suite "[Unit - Spec - Block processing] Attestations " & preset():
const NumValidators = uint64(8) * SLOTS_PER_EPOCH
let genesisState = initGenesisState(NumValidators)
doAssert genesisState.validators.len == int NumValidators
template valid_attestation(name: string, body: untyped): untyped {.dirty.}=
# Process a valid attestation
#
# The BeaconState is exposed as "state" in the calling context
# The attestation to process must be named "attestation" in the calling context
test name:
var state{.inject.}: BeaconState
deepCopy(state, genesisState)
# Attestation setup body
# ----------------------------------------
body
# Params for sanity checks
# ----------------------------------------
let
current_epoch_count = state.current_epoch_attestations.len
previous_epoch_count = state.previous_epoch_attestations.len
# State transition
# ----------------------------------------
var cache = get_empty_per_epoch_cache()
check process_attestation(
state, attestation, flags = {}, cache
)
# Check that the attestation was processed
if attestation.data.target.epoch == state.get_current_epoch():
check(state.current_epoch_attestations.len == current_epoch_count + 1)
else:
check(state.previous_epoch_attestations.len == previous_epoch_count + 1)
valid_attestation("Valid attestation"):
let attestation = mockAttestation(state)
state.slot += MIN_ATTESTATION_INCLUSION_DELAY
valid_attestation("Valid attestation from previous epoch"):
let attestation = mockAttestation(state)
state.slot = Slot(SLOTS_PER_EPOCH - 1)
nextEpoch(state)
applyEmptyBlock(state)
# TODO check if this should be replaced
when false:
when MAX_EPOCHS_PER_CROSSLINK > 4'u64:
test "Valid attestation since max epochs per crosslinks [Skipped for preset: " & const_preset & ']':
discard
else:
valid_attestation("Valid attestation since max epochs per crosslinks"):
for _ in 0 ..< MAX_EPOCHS_PER_CROSSLINK + 2:
nextEpoch(state)
applyEmptyBlock(state)
let attestation = mockAttestation(state)
check: attestation.data.crosslink.end_epoch - attestation.data.crosslink.start_epoch == MAX_EPOCHS_PER_CROSSLINK
for _ in 0 ..< MIN_ATTESTATION_INCLUSION_DELAY:
nextSlot(state)
valid_attestation("Empty aggregation bit"):
var attestation = mockAttestation(state)
state.slot += MIN_ATTESTATION_INCLUSION_DELAY
# Overwrite committee
attestation.aggregation_bits = init(CommitteeValidatorsBits, attestation.aggregation_bits.len)
signMockAttestation(state, attestation)
# TODO - invalid attestations
# - Wrong end epoch
# - Invalid signature
# - Before inclusion delay
# - past last inclusion slot
# - before oldest known source epoch
# - wrong shard
# - invalid shard
# - target epoch too old
# - target epoch too far in the future
# - source epoch in the future
# - invalid current source root
# - bad source root
# - non-zero crosslink data root
# - bad parent crosslink
# - bad crosslink start epoch
# - bad crosslink end epoch
# - inconsistent custody bits length
# - non-empty custody bits in phase 0