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Merge pull request #850 from ethereum/vbuterin-patch-13 

Withdrawal queue -> exit queue
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Danny Ryan 2019-04-14 19:21:52 +10:00 committed by GitHub
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232
specs/core/0_beacon-chain.md
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@ -93,15 +93,14 @@
- [`is_surround_vote`](#is_surround_vote)
- [`integer_squareroot`](#integer_squareroot)
- [`get_delayed_activation_exit_epoch`](#get_delayed_activation_exit_epoch)
- [`get_churn_limit`](#get_churn_limit)
- [`bls_verify`](#bls_verify)
- [`bls_verify_multiple`](#bls_verify_multiple)
- [`bls_aggregate_pubkeys`](#bls_aggregate_pubkeys)
- [Routines for updating validator status](#routines-for-updating-validator-status)
- [`activate_validator`](#activate_validator)
- [`initiate_validator_exit`](#initiate_validator_exit)
- [`exit_validator`](#exit_validator)
- [`slash_validator`](#slash_validator)
- [`prepare_validator_for_withdrawal`](#prepare_validator_for_withdrawal)
- [Ethereum 1.0 deposit contract](#ethereum-10-deposit-contract)
- [Deposit arguments](#deposit-arguments)
- [Withdrawal credentials](#withdrawal-credentials)
@ -122,9 +121,9 @@
- [Justification and finalization](#justification-and-finalization)
- [Crosslinks](#crosslinks-1)
- [Apply rewards](#apply-rewards)
- [Ejections](#ejections)
- [Validator registry and shuffling seed data](#validator-registry-and-shuffling-seed-data)
- [Slashings and exit queue](#slashings-and-exit-queue)
- [Balance-driven status transitions](#balance-driven-status-transitions)
- [Activation queue and start shard](#activation-queue-and-start-shard)
- [Slashings](#slashings)
- [Final updates](#final-updates)
- [Per-slot processing](#per-slot-processing)
- [Per-block processing](#per-block-processing)
@ -183,9 +182,9 @@ These configurations are updated for releases, but may be out of sync during `de
| - | - |
| `SHARD_COUNT` | `2**10` (= 1,024) |
| `TARGET_COMMITTEE_SIZE` | `2**7` (= 128) |
| `MAX_BALANCE_CHURN_QUOTIENT` | `2**5` (= 32) |
| `MAX_ATTESTATION_PARTICIPANTS` | `2**12` (= 4,096) |
| `MAX_EXIT_DEQUEUES_PER_EPOCH` | `2**2` (= 4) |
| `MIN_PER_EPOCH_CHURN_LIMIT` | `2**2` (= 4) |
| `CHURN_LIMIT_QUOTIENT` | `2**16` (= 65,536) |
| `SHUFFLE_ROUND_COUNT` | 90 |
* For the safety of crosslinks `TARGET_COMMITTEE_SIZE` exceeds [the recommended minimum committee size of 111](https://vitalik.ca/files/Ithaca201807_Sharding.pdf); with sufficient active validators (at least `SLOTS_PER_EPOCH * TARGET_COMMITTEE_SIZE`), the shuffling algorithm ensures committee sizes of at least `TARGET_COMMITTEE_SIZE`. (Unbiasable randomness with a Verifiable Delay Function (VDF) will improve committee robustness and lower the safe minimum committee size.)
@ -238,7 +237,6 @@ These configurations are updated for releases, but may be out of sync during `de
* `MAX_CROSSLINK_EPOCHS` should be a small constant times `SHARD_COUNT // SLOTS_PER_EPOCH`
### State list lengths
| Name | Value | Unit | Duration |
@ -417,14 +415,14 @@ The types are defined topologically to aid in facilitating an executable version
'pubkey': 'bytes48',
# Withdrawal credentials
'withdrawal_credentials': 'bytes32',
# Epoch when became eligible for activation
'activation_eligibility_epoch': 'uint64',
# Epoch when validator activated
'activation_epoch': 'uint64',
# Epoch when validator exited
'exit_epoch': 'uint64',
# Epoch when validator is eligible to withdraw
'withdrawable_epoch': 'uint64',
# Did the validator initiate an exit
'initiated_exit': 'bool',
# Was the validator slashed
'slashed': 'bool',
# Rounded balance
@ -590,7 +588,6 @@ The types are defined topologically to aid in facilitating an executable version
# Validator registry
'validator_registry': [Validator],
'balances': ['uint64'],
'validator_registry_update_epoch': 'uint64',
# Randomness and committees
'latest_randao_mixes': ['bytes32', LATEST_RANDAO_MIXES_LENGTH],
@ -744,11 +741,11 @@ def is_slashable_validator(validator: Validator, epoch: Epoch) -> bool:
### `get_active_validator_indices`
```python
def get_active_validator_indices(validators: List[Validator], epoch: Epoch) -> List[ValidatorIndex]:
def get_active_validator_indices(state: BeaconState, epoch: Epoch) -> List[ValidatorIndex]:
"""
Get indices of active validators from ``validators``.
Get active validator indices at ``epoch``.
"""
return [i for i, v in enumerate(validators) if is_active_validator(v, epoch)]
return [i for i, v in enumerate(state.validator_registry) if is_active_validator(v, epoch)]
```
### `get_balance`
@ -842,7 +839,7 @@ def get_epoch_committee_count(state: BeaconState, epoch: Epoch) -> int:
"""
Return the number of committees in one epoch.
"""
active_validators = get_active_validator_indices(state.validator_registry, epoch)
active_validators = get_active_validator_indices(state, epoch)
return max(
1,
min(
@ -894,10 +891,7 @@ def get_crosslink_committees_at_slot(state: BeaconState,
next_epoch = current_epoch + 1
assert previous_epoch <= epoch <= next_epoch
indices = get_active_validator_indices(
state.validator_registry,
epoch,
)
indices = get_active_validator_indices(state, epoch)
if epoch == current_epoch:
start_shard = state.latest_start_shard
@ -1268,6 +1262,16 @@ def get_delayed_activation_exit_epoch(epoch: Epoch) -> Epoch:
return epoch + 1 + ACTIVATION_EXIT_DELAY
```
### `get_churn_limit`
```python
def get_churn_limit(state: BeaconState) -> int:
return max(
MIN_PER_EPOCH_CHURN_LIMIT,
len(get_active_validator_indices(state, get_current_epoch(state))) // CHURN_LIMIT_QUOTIENT
)
```
### `bls_verify`
`bls_verify` is a function for verifying a BLS signature, defined in the [BLS Signature spec](../bls_signature.md#bls_verify).
@ -1280,7 +1284,6 @@ def get_delayed_activation_exit_epoch(epoch: Epoch) -> Epoch:
`bls_aggregate_pubkeys` is a function for aggregating multiple BLS public keys into a single aggregate key, defined in the [BLS Signature spec](../bls_signature.md#bls_aggregate_pubkeys).
### Routines for updating validator status
Note: All functions in this section mutate `state`.
@ -1295,7 +1298,11 @@ def activate_validator(state: BeaconState, index: ValidatorIndex, is_genesis: bo
"""
validator = state.validator_registry[index]
validator.activation_epoch = GENESIS_EPOCH if is_genesis else get_delayed_activation_exit_epoch(get_current_epoch(state))
if is_genesis:
validator.activation_eligibility_epoch = GENESIS_EPOCH
validator.activation_epoch = GENESIS_EPOCH
else:
validator.activation_epoch = get_delayed_activation_exit_epoch(get_current_epoch(state))
```
#### `initiate_validator_exit`
@ -1306,23 +1313,21 @@ def initiate_validator_exit(state: BeaconState, index: ValidatorIndex) -> None:
Initiate the validator of the given ``index``.
Note that this function mutates ``state``.
"""
# Return if validator already initiated exit
validator = state.validator_registry[index]
validator.initiated_exit = True
```
if validator.exit_epoch != FAR_FUTURE_EPOCH:
return
#### `exit_validator`
# Compute exit queue epoch
exit_epochs = [v.exit_epoch for v in state.validator_registry if v.exit_epoch != FAR_FUTURE_EPOCH]
exit_queue_epoch = sorted(exit_epochs + [get_delayed_activation_exit_epoch(get_current_epoch(state))])[-1]
exit_queue_churn = len([v for v in state.validator_registry if v.exit_epoch == exit_queue_epoch])
if exit_queue_churn >= get_churn_limit(state):
exit_queue_epoch += 1
```python
def exit_validator(state: BeaconState, index: ValidatorIndex) -> None:
"""
Exit the validator with the given ``index``.
Note that this function mutates ``state``.
"""
validator = state.validator_registry[index]
# Update validator exit epoch if not previously exited
if validator.exit_epoch == FAR_FUTURE_EPOCH:
validator.exit_epoch = get_delayed_activation_exit_epoch(get_current_epoch(state))
# Set validator exit epoch and withdrawable epoch
validator.exit_epoch = exit_queue_epoch
validator.withdrawable_epoch = validator.exit_epoch + MIN_VALIDATOR_WITHDRAWABILITY_DELAY
```
#### `slash_validator`
@ -1333,7 +1338,7 @@ def slash_validator(state: BeaconState, slashed_index: ValidatorIndex, whistlebl
Slash the validator with index ``slashed_index``.
Note that this function mutates ``state``.
"""
exit_validator(state, slashed_index)
initiate_validator_exit(state, slashed_index)
state.validator_registry[slashed_index].slashed = True
state.validator_registry[slashed_index].withdrawable_epoch = get_current_epoch(state) + LATEST_SLASHED_EXIT_LENGTH
slashed_balance = get_effective_balance(state, slashed_index)
@ -1349,19 +1354,6 @@ def slash_validator(state: BeaconState, slashed_index: ValidatorIndex, whistlebl
decrease_balance(state, slashed_index, whistleblowing_reward)
```
#### `prepare_validator_for_withdrawal`
```python
def prepare_validator_for_withdrawal(state: BeaconState, index: ValidatorIndex) -> None:
"""
Set the validator with the given ``index`` as withdrawable
``MIN_VALIDATOR_WITHDRAWABILITY_DELAY`` after the current epoch.
Note that this function mutates ``state``.
"""
validator = state.validator_registry[index]
validator.withdrawable_epoch = get_current_epoch(state) + MIN_VALIDATOR_WITHDRAWABILITY_DELAY
```
## Ethereum 1.0 deposit contract
The initial deployment phases of Ethereum 2.0 are implemented without consensus changes to Ethereum 1.0. A deposit contract at address `DEPOSIT_CONTRACT_ADDRESS` is added to Ethereum 1.0 for deposits of ETH to the beacon chain. Validator balances will be withdrawable to the shards in phase 2, i.e. when the EVM2.0 is deployed and the shards have state.
@ -1466,7 +1458,6 @@ def get_genesis_beacon_state(genesis_validator_deposits: List[Deposit],
# Validator registry
validator_registry=[],
balances=[],
validator_registry_update_epoch=GENESIS_EPOCH,
# Randomness and committees
latest_randao_mixes=Vector([ZERO_HASH for _ in range(LATEST_RANDAO_MIXES_LENGTH)]),
@ -1503,11 +1494,11 @@ def get_genesis_beacon_state(genesis_validator_deposits: List[Deposit],
process_deposit(state, deposit)
# Process genesis activations
for validator_index, _ in enumerate(state.validator_registry):
for validator_index in range(len(state.validator_registry)):
if get_effective_balance(state, validator_index) >= MAX_DEPOSIT_AMOUNT:
activate_validator(state, validator_index, is_genesis=True)
genesis_active_index_root = hash_tree_root(get_active_validator_indices(state.validator_registry, GENESIS_EPOCH))
genesis_active_index_root = hash_tree_root(get_active_validator_indices(state, GENESIS_EPOCH))
for index in range(LATEST_ACTIVE_INDEX_ROOTS_LENGTH):
state.latest_active_index_roots[index] = genesis_active_index_root
@ -1641,25 +1632,25 @@ We define some helper functions utilized when processing an epoch transition:
```python
def get_current_total_balance(state: BeaconState) -> Gwei:
return get_total_balance(state, get_active_validator_indices(state.validator_registry, get_current_epoch(state)))
return get_total_balance(state, get_active_validator_indices(state, get_current_epoch(state)))
```
```python
def get_previous_total_balance(state: BeaconState) -> Gwei:
return get_total_balance(state, get_active_validator_indices(state.validator_registry, get_previous_epoch(state)))
return get_total_balance(state, get_active_validator_indices(state, get_previous_epoch(state)))
```
```python
def get_attesting_indices(state: BeaconState, attestations: List[PendingAttestation]) -> List[ValidatorIndex]:
def get_unslashed_attesting_indices(state: BeaconState, attestations: List[PendingAttestation]) -> List[ValidatorIndex]:
output = set()
for a in attestations:
output = output.union(get_attestation_participants(state, a.data, a.aggregation_bitfield))
return sorted(list(output))
return sorted(filter(lambda index: not state.validator_registry[index].slashed, list(output)))
```
```python
def get_attesting_balance(state: BeaconState, attestations: List[PendingAttestation]) -> Gwei:
return get_total_balance(state, get_attesting_indices(state, attestations))
return get_total_balance(state, get_unslashed_attesting_indices(state, attestations))
```
```python
@ -1707,7 +1698,7 @@ def get_winning_root_and_participants(state: BeaconState, shard: Shard) -> Tuple
# lexicographically higher hash
winning_root = max(all_roots, key=lambda r: (get_attesting_balance(state, get_attestations_for(r)), r))
return winning_root, get_attesting_indices(state, get_attestations_for(winning_root))
return winning_root, get_unslashed_attesting_indices(state, get_attestations_for(winning_root))
```
```python
@ -1864,7 +1855,7 @@ def get_justification_and_finalization_deltas(state: BeaconState) -> Tuple[List[
for index in eligible_validators:
base_reward = get_base_reward(state, index)
# Expected FFG source
if index in get_attesting_indices(state, state.previous_epoch_attestations):
if index in get_unslashed_attesting_indices(state, state.previous_epoch_attestations):
rewards[index] += base_reward * total_attesting_balance // total_balance
# Inclusion speed bonus
rewards[index] += (
@ -1874,17 +1865,17 @@ def get_justification_and_finalization_deltas(state: BeaconState) -> Tuple[List[
else:
penalties[index] += base_reward
# Expected FFG target
if index in get_attesting_indices(state, boundary_attestations):
if index in get_unslashed_attesting_indices(state, boundary_attestations):
rewards[index] += base_reward * boundary_attesting_balance // total_balance
else:
penalties[index] += get_inactivity_penalty(state, index, epochs_since_finality)
# Expected head
if index in get_attesting_indices(state, matching_head_attestations):
if index in get_unslashed_attesting_indices(state, matching_head_attestations):
rewards[index] += base_reward * matching_head_balance // total_balance
else:
penalties[index] += base_reward
# Proposer bonus
if index in get_attesting_indices(state, state.previous_epoch_attestations):
if index in get_unslashed_attesting_indices(state, state.previous_epoch_attestations):
proposer_index = get_beacon_proposer_index(state, inclusion_slot(state, index))
rewards[proposer_index] += base_reward // PROPOSER_REWARD_QUOTIENT
# Take away max rewards if we're not finalizing
@ -1933,91 +1924,49 @@ def apply_rewards(state: BeaconState) -> None:
)
```
#### Ejections
#### Balance-driven status transitions
Run `process_ejections(state)`.
Run `process_balance_driven_status_transitions(state)`.
```python
def process_ejections(state: BeaconState) -> None:
def process_balance_driven_status_transitions(state: BeaconState) -> None:
"""
Iterate through the validator registry
and eject active validators with balance below ``EJECTION_BALANCE``.
and deposit or eject active validators with sufficiently high or low balances
"""
for index in get_active_validator_indices(state.validator_registry, get_current_epoch(state)):
if get_balance(state, index) < EJECTION_BALANCE:
for index, validator in enumerate(state.validator_registry):
balance = get_balance(state, index)
if validator.activation_eligibility_epoch == FAR_FUTURE_EPOCH and balance >= MAX_DEPOSIT_AMOUNT:
state.activation_eligibility_epoch = get_current_epoch(state)
if is_active_validator(validator, get_current_epoch(state)) and balance < EJECTION_BALANCE:
initiate_validator_exit(state, index)
```
#### Validator registry and shuffling seed data
```python
def update_validator_registry(state: BeaconState) -> None:
"""
Update validator registry.
Note that this function mutates ``state``.
"""
current_epoch = get_current_epoch(state)
# The active validators
active_validator_indices = get_active_validator_indices(state.validator_registry, current_epoch)
# The total effective balance of active validators
total_balance = get_total_balance(state, active_validator_indices)
# The maximum balance churn in Gwei (for deposits and exits separately)
max_balance_churn = max(
MAX_DEPOSIT_AMOUNT,
total_balance // (2 * MAX_BALANCE_CHURN_QUOTIENT)
)
# Activate validators within the allowable balance churn
balance_churn = 0
for index, validator in enumerate(state.validator_registry):
if validator.activation_epoch == FAR_FUTURE_EPOCH and get_balance(state, index) >= MAX_DEPOSIT_AMOUNT:
# Check the balance churn would be within the allowance
balance_churn += get_effective_balance(state, index)
if balance_churn > max_balance_churn:
break
# Activate validator
activate_validator(state, index, is_genesis=False)
# Exit validators within the allowable balance churn
if current_epoch < state.validator_registry_update_epoch + LATEST_SLASHED_EXIT_LENGTH:
balance_churn = (
state.latest_slashed_balances[state.validator_registry_update_epoch % LATEST_SLASHED_EXIT_LENGTH] -
state.latest_slashed_balances[current_epoch % LATEST_SLASHED_EXIT_LENGTH]
)
for index, validator in enumerate(state.validator_registry):
if validator.exit_epoch == FAR_FUTURE_EPOCH and validator.initiated_exit:
# Check the balance churn would be within the allowance
balance_churn += get_effective_balance(state, index)
if balance_churn > max_balance_churn:
break
# Exit validator
exit_validator(state, index)
state.validator_registry_update_epoch = current_epoch
```
#### Activation queue and start shard
Run the following function:
```python
def update_registry(state: BeaconState) -> None:
# Check if we should update, and if so, update
if state.finalized_epoch > state.validator_registry_update_epoch:
update_validator_registry(state)
activation_queue = sorted([
validator for validator in state.validator_registry if
validator.activation_eligibility_epoch != FAR_FUTURE_EPOCH and
validator.activation_epoch >= get_delayed_activation_exit_epoch(state.finalized_epoch)
], key=lambda index: state.validator_registry[index].activation_eligibility_epoch)
for index in activation_queue[:get_churn_limit(state)]:
activate_validator(state, index, is_genesis=False)
state.latest_start_shard = (
state.latest_start_shard +
get_shard_delta(state, get_current_epoch(state))
) % SHARD_COUNT
```
**Invariant**: the active index root that is hashed into the shuffling seed actually is the `hash_tree_root` of the validator set that is used for that epoch.
#### Slashings
#### Slashings and exit queue
Run `process_slashings(state)` and `process_exit_queue(state)`:
Run `process_slashings(state)`:
```python
def process_slashings(state: BeaconState) -> None:
@ -2026,7 +1975,7 @@ def process_slashings(state: BeaconState) -> None:
Note that this function mutates ``state``.
"""
current_epoch = get_current_epoch(state)
active_validator_indices = get_active_validator_indices(state.validator_registry, current_epoch)
active_validator_indices = get_active_validator_indices(state, current_epoch)
total_balance = get_total_balance(state, active_validator_indices)
# Compute `total_penalties`
@ -2043,30 +1992,6 @@ def process_slashings(state: BeaconState) -> None:
decrease_balance(state, index, penalty)
```
```python
def process_exit_queue(state: BeaconState) -> None:
"""
Process the exit queue.
Note that this function mutates ``state``.
"""
def eligible(index):
validator = state.validator_registry[index]
# Filter out dequeued validators
if validator.withdrawable_epoch != FAR_FUTURE_EPOCH:
return False
# Dequeue if the minimum amount of time has passed
else:
return get_current_epoch(state) >= validator.exit_epoch + MIN_VALIDATOR_WITHDRAWABILITY_DELAY
eligible_indices = filter(eligible, list(range(len(state.validator_registry))))
# Sort in order of exit epoch, and validators that exit within the same epoch exit in order of validator index
sorted_indices = sorted(eligible_indices, key=lambda index: state.validator_registry[index].exit_epoch)
for dequeues, index in enumerate(sorted_indices):
if dequeues >= MAX_EXIT_DEQUEUES_PER_EPOCH:
break
prepare_validator_for_withdrawal(state, index)
```
#### Final updates
Run the following function:
@ -2078,7 +2003,7 @@ def finish_epoch_update(state: BeaconState) -> None:
# Set active index root
index_root_position = (next_epoch + ACTIVATION_EXIT_DELAY) % LATEST_ACTIVE_INDEX_ROOTS_LENGTH
state.latest_active_index_roots[index_root_position] = hash_tree_root(
get_active_validator_indices(state.validator_registry, next_epoch + ACTIVATION_EXIT_DELAY)
get_active_validator_indices(state, next_epoch + ACTIVATION_EXIT_DELAY)
)
# Set total slashed balances
state.latest_slashed_balances[next_epoch % LATEST_SLASHED_EXIT_LENGTH] = (
@ -2342,6 +2267,7 @@ def process_deposit(state: BeaconState, deposit: Deposit) -> None:
validator = Validator(
pubkey=pubkey,
withdrawal_credentials=deposit.data.withdrawal_credentials,
activation_eligibility_epoch=FAR_FUTURE_EPOCH,
activation_epoch=FAR_FUTURE_EPOCH,
exit_epoch=FAR_FUTURE_EPOCH,
withdrawable_epoch=FAR_FUTURE_EPOCH,
@ -2377,8 +2303,6 @@ def process_voluntary_exit(state: BeaconState, exit: VoluntaryExit) -> None:
assert is_active_validator(validator, get_current_epoch(state))
# Verify the validator has not yet exited
assert validator.exit_epoch == FAR_FUTURE_EPOCH
# Verify the validator has not initiated an exit
assert validator.initiated_exit is False
# Exits must specify an epoch when they become valid; they are not valid before then
assert get_current_epoch(state) >= exit.epoch
# Verify the validator has been active long enough

1
tests/phase0/block_processing/test_process_attestation.py
View File

@ -7,7 +7,6 @@ from build.phase0.state_transition import (
state_transition,
)
from build.phase0.spec import (
ZERO_HASH,
get_current_epoch,
process_attestation,
slot_to_epoch,

1
tests/phase0/block_processing/test_process_attester_slashing.py
View File

@ -31,7 +31,6 @@ def run_attester_slashing_processing(state, attester_slashing, valid=True):
slashed_index = attester_slashing.attestation_1.custody_bit_0_indices[0]
slashed_validator = post_state.validator_registry[slashed_index]
assert not slashed_validator.initiated_exit
assert slashed_validator.slashed
assert slashed_validator.exit_epoch < spec.FAR_FUTURE_EPOCH
assert slashed_validator.withdrawable_epoch < spec.FAR_FUTURE_EPOCH

4
tests/phase0/block_processing/test_process_deposit.py
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@ -15,8 +15,8 @@ from tests.phase0.helpers import (
)
# mark entire file as 'voluntary_exits'
pytestmark = pytest.mark.voluntary_exits
# mark entire file as 'deposits'
pytestmark = pytest.mark.deposits
def test_success(state):

1
tests/phase0/block_processing/test_process_proposer_slashing.py
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@ -30,7 +30,6 @@ def run_proposer_slashing_processing(state, proposer_slashing, valid=True):
process_proposer_slashing(post_state, proposer_slashing)
slashed_validator = post_state.validator_registry[proposer_slashing.proposer_index]
assert not slashed_validator.initiated_exit
assert slashed_validator.slashed
assert slashed_validator.exit_epoch < spec.FAR_FUTURE_EPOCH
assert slashed_validator.withdrawable_epoch < spec.FAR_FUTURE_EPOCH

190
tests/phase0/block_processing/test_voluntary_exit.py
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@ -5,6 +5,7 @@ import build.phase0.spec as spec
from build.phase0.spec import (
get_active_validator_indices,
get_churn_limit,
get_current_epoch,
process_voluntary_exit,
)
@ -18,158 +19,145 @@ from tests.phase0.helpers import (
pytestmark = pytest.mark.voluntary_exits
def test_success(state):
pre_state = deepcopy(state)
#
# setup pre_state
#
# move state forward PERSISTENT_COMMITTEE_PERIOD epochs to allow for exit
pre_state.slot += spec.PERSISTENT_COMMITTEE_PERIOD * spec.SLOTS_PER_EPOCH
def run_voluntary_exit_processing(state, voluntary_exit, valid=True):
"""
Run ``process_voluntary_exit`` returning the pre and post state.
If ``valid == False``, run expecting ``AssertionError``
"""
post_state = deepcopy(state)
#
# build voluntary exit
#
current_epoch = get_current_epoch(pre_state)
validator_index = get_active_validator_indices(pre_state.validator_registry, current_epoch)[0]
privkey = pubkey_to_privkey[pre_state.validator_registry[validator_index].pubkey]
if not valid:
with pytest.raises(AssertionError):
process_voluntary_exit(post_state, voluntary_exit)
return state, None
process_voluntary_exit(post_state, voluntary_exit)
validator_index = voluntary_exit.validator_index
assert state.validator_registry[validator_index].exit_epoch == spec.FAR_FUTURE_EPOCH
assert post_state.validator_registry[validator_index].exit_epoch < spec.FAR_FUTURE_EPOCH
return state, post_state
def test_success(state):
# move state forward PERSISTENT_COMMITTEE_PERIOD epochs to allow for exit
state.slot += spec.PERSISTENT_COMMITTEE_PERIOD * spec.SLOTS_PER_EPOCH
current_epoch = get_current_epoch(state)
validator_index = get_active_validator_indices(state, current_epoch)[0]
privkey = pubkey_to_privkey[state.validator_registry[validator_index].pubkey]
voluntary_exit = build_voluntary_exit(
pre_state,
state,
current_epoch,
validator_index,
privkey,
)
post_state = deepcopy(pre_state)
pre_state, post_state = run_voluntary_exit_processing(state, voluntary_exit)
return pre_state, voluntary_exit, post_state
#
# test valid exit
#
process_voluntary_exit(post_state, voluntary_exit)
assert not pre_state.validator_registry[validator_index].initiated_exit
assert post_state.validator_registry[validator_index].initiated_exit
def test_success_exit_queue(state):
# move state forward PERSISTENT_COMMITTEE_PERIOD epochs to allow for exit
state.slot += spec.PERSISTENT_COMMITTEE_PERIOD * spec.SLOTS_PER_EPOCH
current_epoch = get_current_epoch(state)
# exit `MAX_EXITS_PER_EPOCH`
initial_indices = get_active_validator_indices(state, current_epoch)[:get_churn_limit(state)]
post_state = state
for index in initial_indices:
privkey = pubkey_to_privkey[state.validator_registry[index].pubkey]
voluntary_exit = build_voluntary_exit(
state,
current_epoch,
index,
privkey,
)
pre_state, post_state = run_voluntary_exit_processing(post_state, voluntary_exit)
# exit an additional validator
validator_index = get_active_validator_indices(state, current_epoch)[-1]
privkey = pubkey_to_privkey[state.validator_registry[validator_index].pubkey]
voluntary_exit = build_voluntary_exit(
state,
current_epoch,
validator_index,
privkey,
)
pre_state, post_state = run_voluntary_exit_processing(post_state, voluntary_exit)
assert (
post_state.validator_registry[validator_index].exit_epoch ==
post_state.validator_registry[initial_indices[0]].exit_epoch + 1
)
return pre_state, voluntary_exit, post_state
def test_validator_not_active(state):
pre_state = deepcopy(state)
current_epoch = get_current_epoch(pre_state)
validator_index = get_active_validator_indices(pre_state.validator_registry, current_epoch)[0]
privkey = pubkey_to_privkey[pre_state.validator_registry[validator_index].pubkey]
current_epoch = get_current_epoch(state)
validator_index = get_active_validator_indices(state, current_epoch)[0]
privkey = pubkey_to_privkey[state.validator_registry[validator_index].pubkey]
#
# setup pre_state
#
pre_state.validator_registry[validator_index].activation_epoch = spec.FAR_FUTURE_EPOCH
state.validator_registry[validator_index].activation_epoch = spec.FAR_FUTURE_EPOCH
#
# build and test voluntary exit
#
voluntary_exit = build_voluntary_exit(
pre_state,
state,
current_epoch,
validator_index,
privkey,
)
with pytest.raises(AssertionError):
process_voluntary_exit(pre_state, voluntary_exit)
return pre_state, voluntary_exit, None
pre_state, post_state = run_voluntary_exit_processing(state, voluntary_exit, False)
return pre_state, voluntary_exit, post_state
def test_validator_already_exited(state):
pre_state = deepcopy(state)
#
# setup pre_state
#
# move state forward PERSISTENT_COMMITTEE_PERIOD epochs to allow validator able to exit
pre_state.slot += spec.PERSISTENT_COMMITTEE_PERIOD * spec.SLOTS_PER_EPOCH
state.slot += spec.PERSISTENT_COMMITTEE_PERIOD * spec.SLOTS_PER_EPOCH
current_epoch = get_current_epoch(pre_state)
validator_index = get_active_validator_indices(pre_state.validator_registry, current_epoch)[0]
privkey = pubkey_to_privkey[pre_state.validator_registry[validator_index].pubkey]
current_epoch = get_current_epoch(state)
validator_index = get_active_validator_indices(state, current_epoch)[0]
privkey = pubkey_to_privkey[state.validator_registry[validator_index].pubkey]
# but validator already has exited
pre_state.validator_registry[validator_index].exit_epoch = current_epoch + 2
state.validator_registry[validator_index].exit_epoch = current_epoch + 2
#
# build voluntary exit
#
voluntary_exit = build_voluntary_exit(
pre_state,
state,
current_epoch,
validator_index,
privkey,
)
with pytest.raises(AssertionError):
process_voluntary_exit(pre_state, voluntary_exit)
return pre_state, voluntary_exit, None
def test_validator_already_initiated_exit(state):
pre_state = deepcopy(state)
#
# setup pre_state
#
# move state forward PERSISTENT_COMMITTEE_PERIOD epochs to allow validator able to exit
pre_state.slot += spec.PERSISTENT_COMMITTEE_PERIOD * spec.SLOTS_PER_EPOCH
current_epoch = get_current_epoch(pre_state)
validator_index = get_active_validator_indices(pre_state.validator_registry, current_epoch)[0]
privkey = pubkey_to_privkey[pre_state.validator_registry[validator_index].pubkey]
# but validator already has initiated exit
pre_state.validator_registry[validator_index].initiated_exit = True
#
# build voluntary exit
#
voluntary_exit = build_voluntary_exit(
pre_state,
current_epoch,
validator_index,
privkey,
)
with pytest.raises(AssertionError):
process_voluntary_exit(pre_state, voluntary_exit)
return pre_state, voluntary_exit, None
pre_state, post_state = run_voluntary_exit_processing(state, voluntary_exit, False)
return pre_state, voluntary_exit, post_state
def test_validator_not_active_long_enough(state):
pre_state = deepcopy(state)
#
# setup pre_state
#
current_epoch = get_current_epoch(pre_state)
validator_index = get_active_validator_indices(pre_state.validator_registry, current_epoch)[0]
privkey = pubkey_to_privkey[pre_state.validator_registry[validator_index].pubkey]
current_epoch = get_current_epoch(state)
validator_index = get_active_validator_indices(state, current_epoch)[0]
privkey = pubkey_to_privkey[state.validator_registry[validator_index].pubkey]
# but validator already has initiated exit
pre_state.validator_registry[validator_index].initiated_exit = True
#
# build voluntary exit
#
voluntary_exit = build_voluntary_exit(
pre_state,
state,
current_epoch,
validator_index,
privkey,
)
assert (
current_epoch - pre_state.validator_registry[validator_index].activation_epoch <
current_epoch - state.validator_registry[validator_index].activation_epoch <
spec.PERSISTENT_COMMITTEE_PERIOD
)
with pytest.raises(AssertionError):
process_voluntary_exit(pre_state, voluntary_exit)
return pre_state, voluntary_exit, None
pre_state, post_state = run_voluntary_exit_processing(state, voluntary_exit, False)
return pre_state, voluntary_exit, post_state

11
tests/phase0/helpers.py
View File

@ -25,7 +25,6 @@ from build.phase0.spec import (
get_attestation_participants,
get_block_root,
get_crosslink_committee_for_attestation,
get_crosslink_committees_at_slot,
get_current_epoch,
get_domain,
get_empty_block,
@ -96,14 +95,6 @@ def create_genesis_state(num_validators, deposit_data_leaves=None):
)
def force_registry_change_at_next_epoch(state):
# artificially trigger registry update at next epoch transition
state.finalized_epoch = get_current_epoch(state) - 1
for crosslink in state.latest_crosslinks:
crosslink.epoch = state.finalized_epoch
state.validator_registry_update_epoch = state.finalized_epoch - 1
def build_empty_block_for_next_slot(state):
empty_block = get_empty_block()
empty_block.slot = state.slot + 1
@ -208,7 +199,7 @@ def build_deposit(state,
def get_valid_proposer_slashing(state):
current_epoch = get_current_epoch(state)
validator_index = get_active_validator_indices(state.validator_registry, current_epoch)[-1]
validator_index = get_active_validator_indices(state, current_epoch)[-1]
privkey = pubkey_to_privkey[state.validator_registry[validator_index].pubkey]
slot = state.slot

34
tests/phase0/test_sanity.py
View File

@ -39,7 +39,6 @@ from build.phase0.utils.merkle_minimal import (
from tests.phase0.helpers import (
build_deposit_data,
build_empty_block_for_next_slot,
force_registry_change_at_next_epoch,
get_valid_attestation,
get_valid_attester_slashing,
get_valid_proposer_slashing,
@ -128,11 +127,9 @@ def test_proposer_slashing(state):
block.body.proposer_slashings.append(proposer_slashing)
state_transition(test_state, block)
assert not state.validator_registry[validator_index].initiated_exit
assert not state.validator_registry[validator_index].slashed
slashed_validator = test_state.validator_registry[validator_index]
assert not slashed_validator.initiated_exit
assert slashed_validator.slashed
assert slashed_validator.exit_epoch < spec.FAR_FUTURE_EPOCH
assert slashed_validator.withdrawable_epoch < spec.FAR_FUTURE_EPOCH
@ -154,11 +151,9 @@ def test_attester_slashing(state):
block.body.attester_slashings.append(attester_slashing)
state_transition(test_state, block)
assert not state.validator_registry[validator_index].initiated_exit
assert not state.validator_registry[validator_index].slashed
slashed_validator = test_state.validator_registry[validator_index]
assert not slashed_validator.initiated_exit
assert slashed_validator.slashed
assert slashed_validator.exit_epoch < spec.FAR_FUTURE_EPOCH
assert slashed_validator.withdrawable_epoch < spec.FAR_FUTURE_EPOCH
@ -283,14 +278,12 @@ def test_attestation(state):
def test_voluntary_exit(state):
pre_state = deepcopy(state)
validator_index = get_active_validator_indices(
pre_state.validator_registry,
pre_state,
get_current_epoch(pre_state)
)[-1]
# move state forward PERSISTENT_COMMITTEE_PERIOD epochs to allow for exit
pre_state.slot += spec.PERSISTENT_COMMITTEE_PERIOD * spec.SLOTS_PER_EPOCH
# artificially trigger registry update at next epoch transition
force_registry_change_at_next_epoch(pre_state)
post_state = deepcopy(pre_state)
@ -316,9 +309,7 @@ def test_voluntary_exit(state):
initiate_exit_block.body.voluntary_exits.append(voluntary_exit)
state_transition(post_state, initiate_exit_block)
assert not pre_state.validator_registry[validator_index].initiated_exit
assert post_state.validator_registry[validator_index].initiated_exit
assert post_state.validator_registry[validator_index].exit_epoch == spec.FAR_FUTURE_EPOCH
assert post_state.validator_registry[validator_index].exit_epoch < spec.FAR_FUTURE_EPOCH
#
# Process within epoch transition
@ -335,7 +326,7 @@ def test_voluntary_exit(state):
def test_no_exit_churn_too_long_since_change(state):
pre_state = deepcopy(state)
validator_index = get_active_validator_indices(
pre_state.validator_registry,
pre_state,
get_current_epoch(pre_state)
)[-1]
@ -344,14 +335,6 @@ def test_no_exit_churn_too_long_since_change(state):
#
# move state forward PERSISTENT_COMMITTEE_PERIOD epochs to allow for exit
pre_state.slot += spec.PERSISTENT_COMMITTEE_PERIOD * spec.SLOTS_PER_EPOCH
# artificially trigger registry update at next epoch transition
force_registry_change_at_next_epoch(pre_state)
# make epochs since registry update greater than LATEST_SLASHED_EXIT_LENGTH
pre_state.validator_registry_update_epoch = (
get_current_epoch(pre_state) - spec.LATEST_SLASHED_EXIT_LENGTH
)
# set validator to have previously initiated exit
pre_state.validator_registry[validator_index].initiated_exit = True
post_state = deepcopy(pre_state)
@ -362,7 +345,6 @@ def test_no_exit_churn_too_long_since_change(state):
block.slot += spec.SLOTS_PER_EPOCH
state_transition(post_state, block)
assert post_state.validator_registry_update_epoch == get_current_epoch(post_state) - 1
assert post_state.validator_registry[validator_index].exit_epoch == spec.FAR_FUTURE_EPOCH
return pre_state, [block], post_state
@ -371,8 +353,8 @@ def test_no_exit_churn_too_long_since_change(state):
def test_transfer(state):
pre_state = deepcopy(state)
current_epoch = get_current_epoch(pre_state)
sender_index = get_active_validator_indices(pre_state.validator_registry, current_epoch)[-1]
recipient_index = get_active_validator_indices(pre_state.validator_registry, current_epoch)[0]
sender_index = get_active_validator_indices(pre_state, current_epoch)[-1]
recipient_index = get_active_validator_indices(pre_state, current_epoch)[0]
transfer_pubkey = pubkeys[-1]
transfer_privkey = privkeys[-1]
amount = get_balance(pre_state, sender_index)
@ -419,11 +401,11 @@ def test_transfer(state):
return pre_state, [block], post_state
def test_ejection(state):
def test_balance_driven_status_transitions(state):
pre_state = deepcopy(state)
current_epoch = get_current_epoch(pre_state)
validator_index = get_active_validator_indices(pre_state.validator_registry, current_epoch)[-1]
validator_index = get_active_validator_indices(pre_state, current_epoch)[-1]
assert pre_state.validator_registry[validator_index].exit_epoch == spec.FAR_FUTURE_EPOCH
@ -438,7 +420,7 @@ def test_ejection(state):
block.slot += spec.SLOTS_PER_EPOCH
state_transition(post_state, block)
assert post_state.validator_registry[validator_index].initiated_exit == True
assert post_state.validator_registry[validator_index].exit_epoch < spec.FAR_FUTURE_EPOCH
return pre_state, [block], post_state

3
utils/phase0/state_transition.py
View File

@ -94,10 +94,9 @@ def process_epoch_transition(state: BeaconState) -> None:
spec.process_crosslinks(state)
spec.maybe_reset_eth1_period(state)
spec.apply_rewards(state)
spec.process_ejections(state)
spec.process_balance_driven_status_transitions(state)
spec.update_registry(state)
spec.process_slashings(state)
spec.process_exit_queue(state)
spec.finish_epoch_update(state)