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fix finalize on double justification in 123 rule

This commit is contained in:
protolambda 2019-06-29 22:27:05 +02:00
parent afb33ddc5b
commit 36dd977b85
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GPG Key ID: EC89FDBB2B4C7623
1 changed files with 39 additions and 32 deletions
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71
test_libs/pyspec/eth2spec/test/phase_0/epoch_processing/test_process_justification_and_finalization.py
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@ -60,7 +60,7 @@ def add_mock_attestations(spec, state, epoch, source, target, sufficient_support
attestations.append(spec.PendingAttestation(
aggregation_bits=aggregation_bits,
data=spec.AttestationData(
beacon_block_root=b'\xaa' * 32,
beacon_block_root=b'\xff' * 32, # irrelevant to testing
source=source,
target=target,
crosslink=spec.Crosslink(shard=shard)
@ -69,6 +69,20 @@ def add_mock_attestations(spec, state, epoch, source, target, sufficient_support
))
def get_checkpoints(spec, epoch):
c1 = None if epoch < 1 else spec.Checkpoint(epoch=epoch - 1, root=b'\xaa' * 32)
c2 = None if epoch < 2 else spec.Checkpoint(epoch=epoch - 2, root=b'\xbb' * 32)
c3 = None if epoch < 3 else spec.Checkpoint(epoch=epoch - 3, root=b'\xcc' * 32)
c4 = None if epoch < 4 else spec.Checkpoint(epoch=epoch - 4, root=b'\xdd' * 32)
c5 = None if epoch < 5 else spec.Checkpoint(epoch=epoch - 5, root=b'\xee' * 32)
return c1, c2, c3, c4, c5
def put_checkpoints_in_block_roots(spec, state, checkpoints):
for c in checkpoints:
state.block_roots[spec.get_epoch_start_slot(c.epoch) % spec.SLOTS_PER_HISTORICAL_ROOT] = c.root
def finalize_on_234(spec, state, epoch, sufficient_support):
assert epoch > 4
state.slot = (spec.SLOTS_PER_EPOCH * epoch) - 1 # skip ahead to just before epoch
@ -77,12 +91,8 @@ def finalize_on_234(spec, state, epoch, sufficient_support):
# 3210x -- justification bitfield indices
# 11*0. -- justification bitfield contents, . = this epoch, * is being justified now
# checkpoints for the epochs ago:
c4 = spec.Checkpoint(epoch=epoch - 4, root=b'\xdd' * 32)
c3 = spec.Checkpoint(epoch=epoch - 3, root=b'\xcc' * 32)
c2 = spec.Checkpoint(epoch=epoch - 2, root=b'\xbb' * 32)
state.block_roots[spec.get_epoch_start_slot(c4.epoch) % spec.SLOTS_PER_HISTORICAL_ROOT] = c4.root
state.block_roots[spec.get_epoch_start_slot(c3.epoch) % spec.SLOTS_PER_HISTORICAL_ROOT] = c3.root
state.block_roots[spec.get_epoch_start_slot(c2.epoch) % spec.SLOTS_PER_HISTORICAL_ROOT] = c2.root
c1, c2, c3, c4, _ = get_checkpoints(spec, epoch)
put_checkpoints_in_block_roots(spec, state, [c1, c2, c3, c4])
old_finalized = state.finalized_checkpoint
state.previous_justified_checkpoint = c4
@ -117,16 +127,14 @@ def finalize_on_23(spec, state, epoch, sufficient_support):
# 3210x -- justification bitfield indices (post shift)
# 01*0. -- justification bitfield contents, . = this epoch, * is being justified now
# checkpoints for the epochs ago:
c3 = spec.Checkpoint(epoch=epoch - 3, root=b'\xcc' * 32)
c2 = spec.Checkpoint(epoch=epoch - 2, root=b'\xbb' * 32)
state.block_roots[spec.get_epoch_start_slot(c3.epoch) % spec.SLOTS_PER_HISTORICAL_ROOT] = c3.root
state.block_roots[spec.get_epoch_start_slot(c2.epoch) % spec.SLOTS_PER_HISTORICAL_ROOT] = c2.root
c1, c2, c3, _, _ = get_checkpoints(spec, epoch)
put_checkpoints_in_block_roots(spec, state, [c1, c2, c3])
old_finalized = state.finalized_checkpoint
state.previous_justified_checkpoint = c3
state.current_justified_checkpoint = c3
state.justification_bits = spec.Bitvector[spec.JUSTIFICATION_BITS_LENGTH]()
state.justification_bits[1] = 1 # mock 3rd latest epoch as justified (indices are pre-shift)
state.justification_bits[1] = 1 # mock 3rd latest epoch as justified (index is pre-shift)
# mock the 2nd latest epoch as justifiable, with 3rd as source
add_mock_attestations(spec, state,
epoch=epoch - 2,
@ -147,7 +155,7 @@ def finalize_on_23(spec, state, epoch, sufficient_support):
def finalize_on_123(spec, state, epoch, sufficient_support):
assert epoch > 3
assert epoch > 5
state.slot = (spec.SLOTS_PER_EPOCH * epoch) - 1 # skip ahead to just before epoch
# 43210 -- epochs ago
@ -155,19 +163,20 @@ def finalize_on_123(spec, state, epoch, sufficient_support):
# 3210x -- justification bitfield indices (post shift)
# 011*. -- justification bitfield contents, . = this epoch, * is being justified now
# checkpoints for the epochs ago:
c4 = spec.Checkpoint(epoch=epoch - 4, root=b'\xdd' * 32)
c3 = spec.Checkpoint(epoch=epoch - 3, root=b'\xcc' * 32)
c2 = spec.Checkpoint(epoch=epoch - 2, root=b'\xbb' * 32)
c1 = spec.Checkpoint(epoch=epoch - 1, root=b'\xaa' * 32)
state.block_roots[spec.get_epoch_start_slot(c3.epoch) % spec.SLOTS_PER_HISTORICAL_ROOT] = c3.root
state.block_roots[spec.get_epoch_start_slot(c2.epoch) % spec.SLOTS_PER_HISTORICAL_ROOT] = c2.root
state.block_roots[spec.get_epoch_start_slot(c1.epoch) % spec.SLOTS_PER_HISTORICAL_ROOT] = c1.root
c1, c2, c3, c4, c5 = get_checkpoints(spec, epoch)
put_checkpoints_in_block_roots(spec, state, [c1, c2, c3, c4, c5])
old_finalized = state.finalized_checkpoint
state.previous_justified_checkpoint = c4 # not c3, otherwise finalize 23 would trigger.
state.current_justified_checkpoint = c2
state.previous_justified_checkpoint = c5
state.current_justified_checkpoint = c3
state.justification_bits = spec.Bitvector[spec.JUSTIFICATION_BITS_LENGTH]()
state.justification_bits[0:2] = [1, 1] # mock 2nd and 3rd latest epochs as justified (indices are pre-shift)
state.justification_bits[1] = 1 # mock 3rd latest epochs as justified (index is pre-shift)
# mock the 2nd latest epoch as justifiable, with 5th as source
add_mock_attestations(spec, state,
epoch=epoch - 2,
source=c5,
target=c2,
sufficient_support=sufficient_support)
# mock the 1st latest epoch as justifiable, with 3rd as source
add_mock_attestations(spec, state,
epoch=epoch - 1,
@ -178,12 +187,12 @@ def finalize_on_123(spec, state, epoch, sufficient_support):
# process!
yield from run_process_just_and_fin(spec, state)
assert state.previous_justified_checkpoint == c2 # changed to old current
assert state.previous_justified_checkpoint == c3 # changed to old current
if sufficient_support:
assert state.current_justified_checkpoint == c1 # changed to 1st latest
assert state.finalized_checkpoint == c2 # finalized old current
assert state.finalized_checkpoint == c3 # finalized old current
else:
assert state.current_justified_checkpoint == c2 # still old current
assert state.current_justified_checkpoint == c3 # still old current
assert state.finalized_checkpoint == old_finalized # no new finalized
@ -196,10 +205,8 @@ def finalize_on_12(spec, state, epoch, sufficient_support):
# 3210x -- justification bitfield indices (post shift)
# 001*. -- justification bitfield contents, . = this epoch, * is being justified now
# checkpoints for the epochs ago:
c2 = spec.Checkpoint(epoch=epoch - 2, root=b'\xbb' * 32)
c1 = spec.Checkpoint(epoch=epoch - 1, root=b'\xaa' * 32)
state.block_roots[spec.get_epoch_start_slot(c2.epoch) % spec.SLOTS_PER_HISTORICAL_ROOT] = c2.root
state.block_roots[spec.get_epoch_start_slot(c1.epoch) % spec.SLOTS_PER_HISTORICAL_ROOT] = c1.root
c1, c2, _, _, _ = get_checkpoints(spec, epoch)
put_checkpoints_in_block_roots(spec, state, [c1, c2])
old_finalized = state.finalized_checkpoint
state.previous_justified_checkpoint = c2
@ -252,13 +259,13 @@ def test_23_poor_support(spec, state):
@with_all_phases
@spec_state_test
def test_123_ok_support(spec, state):
yield from finalize_on_123(spec, state, 4, True)
yield from finalize_on_123(spec, state, 6, True)
@with_all_phases
@spec_state_test
def test_123_poor_support(spec, state):
yield from finalize_on_123(spec, state, 4, False)
yield from finalize_on_123(spec, state, 6, False)
@with_all_phases