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eth2.0-specs
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bugfix attestation creation so that it works on mainnet with multiple committees per slot, and improve bitfield index descriptions

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protolambda 2019-06-29 18:14:17 +02:00
parent 0c29c5125f
commit 5d633bfdf3
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1 changed files with 34 additions and 29 deletions
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63
test_libs/pyspec/eth2spec/test/phase_0/epoch_processing/test_process_justification_and_finalization.py
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@ -36,6 +36,11 @@ def add_mock_attestations(spec, state, epoch, source, target, sufficient_support
epoch_start_slot = spec.get_epoch_start_slot(epoch)
for slot in range(epoch_start_slot, epoch_start_slot + spec.SLOTS_PER_EPOCH):
for shard in get_shards_for_slot(spec, state, slot):
# Check if we already have had sufficient balance. (and undone if we don't want it).
# If so, do not create more attestations. (we do not have empty pending attestations normally anyway)
if remaining_balance < 0:
return
committee = spec.get_crosslink_committee(state, spec.slot_to_epoch(slot), shard)
# Create a bitfield filled with the given count per attestation,
# exactly on the right-most part of the committee field.
@ -45,22 +50,23 @@ def add_mock_attestations(spec, state, epoch, source, target, sufficient_support
if remaining_balance > 0:
remaining_balance -= state.validators[v].effective_balance
aggregation_bits[v] = 1
elif not sufficient_support:
aggregation_bits[v - 1] = 0
break
else:
break
attestations.append(spec.PendingAttestation(
aggregation_bits=aggregation_bits,
data=spec.AttestationData(
beacon_block_root=b'\xaa' * 32,
source=source,
target=target,
crosslink=spec.Crosslink(shard=shard)
),
inclusion_delay=1,
))
# remove just one attester to make the marginal support insufficient
if not sufficient_support:
aggregation_bits[aggregation_bits.index(1)] = 0
attestations.append(spec.PendingAttestation(
aggregation_bits=aggregation_bits,
data=spec.AttestationData(
beacon_block_root=b'\xaa' * 32,
source=source,
target=target,
crosslink=spec.Crosslink(shard=shard)
),
inclusion_delay=1,
))
def finalize_on_234(spec, state, epoch, sufficient_support):
@ -82,7 +88,7 @@ def finalize_on_234(spec, state, epoch, sufficient_support):
state.previous_justified_checkpoint = c4
state.current_justified_checkpoint = c3
state.justification_bits = spec.Bitvector[spec.JUSTIFICATION_BITS_LENGTH]()
state.justification_bits[1:3] = [1, 1] # mock 2nd and 3rd latest epochs as justified
state.justification_bits[1:3] = [1, 1] # mock 3rd and 4th latest epochs as justified (indices are pre-shift)
# mock the 2nd latest epoch as justifiable, with 4th as source
add_mock_attestations(spec, state,
epoch=epoch - 2,
@ -93,12 +99,11 @@ def finalize_on_234(spec, state, epoch, sufficient_support):
# process!
yield from run_process_just_and_fin(spec, state)
assert state.previous_justified_checkpoint == c3 # changed to old current
if sufficient_support:
assert state.previous_justified_checkpoint == c3 # changed to old current
assert state.current_justified_checkpoint == c2 # changed to 2nd latest
assert state.finalized_checkpoint == c4 # finalized old previous justified epoch
else:
assert state.previous_justified_checkpoint == c3 # changed to old current
assert state.current_justified_checkpoint == c3 # still old current
assert state.finalized_checkpoint == old_finalized # no new finalized
@ -108,7 +113,8 @@ def finalize_on_23(spec, state, epoch, sufficient_support):
state.slot = (spec.SLOTS_PER_EPOCH * epoch) - 1 # skip ahead to just before epoch
# 43210 -- epochs ago
# 3210x -- justification bitfield indices
# 210xx -- justification bitfield indices (pre shift)
# 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'\xaa' * 32)
@ -120,7 +126,7 @@ def finalize_on_23(spec, state, epoch, sufficient_support):
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 2nd latest epoch as justified
state.justification_bits[1] = 1 # mock 3rd latest epoch as justified (indices are pre-shift)
# mock the 2nd latest epoch as justifiable, with 3rd as source
add_mock_attestations(spec, state,
epoch=epoch - 2,
@ -131,12 +137,11 @@ def finalize_on_23(spec, state, epoch, sufficient_support):
# process!
yield from run_process_just_and_fin(spec, state)
assert state.previous_justified_checkpoint == c3 # changed to old current
if sufficient_support:
assert state.previous_justified_checkpoint == c3 # changed to old current
assert state.current_justified_checkpoint == c2 # changed to 2nd latest
assert state.finalized_checkpoint == c3 # finalized old previous justified epoch
else:
assert state.previous_justified_checkpoint == c3 # changed to old current
assert state.current_justified_checkpoint == c3 # still old current
assert state.finalized_checkpoint == old_finalized # no new finalized
@ -146,7 +151,8 @@ def finalize_on_123(spec, state, epoch, sufficient_support):
state.slot = (spec.SLOTS_PER_EPOCH * epoch) - 1 # skip ahead to just before epoch
# 43210 -- epochs ago
# 3210x -- justification bitfield indices
# 210xx -- justification bitfield indices (pre shift)
# 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'\xaa' * 32)
@ -158,10 +164,10 @@ def finalize_on_123(spec, state, epoch, sufficient_support):
state.block_roots[spec.get_epoch_start_slot(c1.epoch) % spec.SLOTS_PER_HISTORICAL_ROOT] = c1.root
old_finalized = state.finalized_checkpoint
state.previous_justified_checkpoint = c4
state.previous_justified_checkpoint = c4 # not c3, otherwise finalize 23 would trigger.
state.current_justified_checkpoint = c2
state.justification_bits = spec.Bitvector[spec.JUSTIFICATION_BITS_LENGTH]()
state.justification_bits[0:2] = [1, 1] # mock 1st and 2nd latest epochs as justified
state.justification_bits[0:2] = [1, 1] # mock 2nd and 3rd latest epochs as justified (indices are pre-shift)
# mock the 1st latest epoch as justifiable, with 3rd as source
add_mock_attestations(spec, state,
epoch=epoch - 1,
@ -172,12 +178,11 @@ 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
if sufficient_support:
assert state.previous_justified_checkpoint == c2 # changed to old current
assert state.current_justified_checkpoint == c1 # changed to 1st latest
assert state.finalized_checkpoint == c2 # finalized old current
else:
assert state.previous_justified_checkpoint == c2 # changed to old current
assert state.current_justified_checkpoint == c2 # still old current
assert state.finalized_checkpoint == old_finalized # no new finalized
@ -187,7 +192,8 @@ def finalize_on_12(spec, state, epoch, sufficient_support):
state.slot = (spec.SLOTS_PER_EPOCH * epoch) - 1 # skip ahead to just before epoch
# 43210 -- epochs ago
# 3210 -- justification bitfield indices
# 210xx -- justification bitfield indices (pre shift)
# 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)
@ -199,7 +205,7 @@ def finalize_on_12(spec, state, epoch, sufficient_support):
state.previous_justified_checkpoint = c2
state.current_justified_checkpoint = c2
state.justification_bits = spec.Bitvector[spec.JUSTIFICATION_BITS_LENGTH]()
state.justification_bits[0] = 1 # mock latest epoch as justified
state.justification_bits[0] = 1 # mock 2nd latest epoch as justified (this is pre-shift)
# mock the 1st latest epoch as justifiable, with 2nd as source
add_mock_attestations(spec, state,
epoch=epoch - 1,
@ -210,12 +216,11 @@ def finalize_on_12(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
if sufficient_support:
assert state.previous_justified_checkpoint == c2 # changed to old current
assert state.current_justified_checkpoint == c1 # changed to 1st latest
assert state.finalized_checkpoint == c2 # finalized previous justified epoch
else:
assert state.previous_justified_checkpoint == c2 # changed to old current
assert state.current_justified_checkpoint == c2 # still old current
assert state.finalized_checkpoint == old_finalized # no new finalized