def confirm_swaps_for_eon(operator_eon_number):
checkpoint_created = RootCommitment.objects.filter(
eon_number=operator_eon_number).exists()
with transaction.atomic():
# Countersign swaps (no matching yet)
swaps_pending_operator_confirmation = Transfer.objects \
.filter(
processed=False,
complete=False,
voided=False,
cancelled=False,
swap=True,
eon_number=operator_eon_number,
sender_active_state__isnull=False,
recipient_active_state__isnull=False,
sender_active_state__operator_signature__isnull=True,
recipient_active_state__operator_signature__isnull=True) \
.select_for_update() \
.order_by('time')
for swap in swaps_pending_operator_confirmation:
with swap.lock(auto_renewal=True), swap.wallet.lock(
auto_renewal=True), swap.recipient.lock(auto_renewal=True):
swap_wallet_view_context = WalletTransferContext(
wallet=swap.wallet, transfer=swap)
swap_recipient_view_context = WalletTransferContext(
wallet=swap.recipient, transfer=swap)
if swap_expired(swap, operator_eon_number, checkpoint_created):
logger.info('Retiring swap')
swap.retire_swap()
if should_void_swap(swap, swap_wallet_view_context,
swap_recipient_view_context,
operator_eon_number, checkpoint_created):
logger.info('Voiding swap.')
swap.close(voided=True)
elif swap.is_fulfilled_swap():
logger.info('Skipping finalized swap.')
elif swap.is_signed_by_operator():
logger.info('Skipping signed swap.')
else:
try:
swap.sign_swap(settings.HUB_OWNER_ACCOUNT_ADDRESS,
settings.HUB_OWNER_ACCOUNT_KEY)
operator_celery.send_task(
'auditor.tasks.on_swap_confirmation',
args=[swap.id])
except LookupError as e:
logger.error(e)
def to_representation(self, transfer: Transfer):
if transfer.final_receipt_hashes is None:
return {}
# include proof if
# 1) context wallet_id is provided and parent is sender wallet
# 2) context wallet_id is None
include_proof = self.context.get(
'wallet_id') is None or self.context.get(
'wallet_id') == transfer.wallet.id
if include_proof:
recipient_balance = WalletTransferContext(
wallet=transfer.recipient,
transfer=transfer).balance_as_of_eon(transfer.eon_number + 1)
return {
'merkle_proof':
ProofSerializer(recipient_balance, read_only=True).data
if include_proof else None,
'transfer_membership_chain':
long_string_to_list(transfer.final_receipt_hashes, 64),
'transfer_membership_trail':
int(transfer.final_receipt_index),
'transfer_membership_values':
csf_to_list(transfer.final_receipt_values)
if transfer.passive else None
}
def to_representation(self, instance: ExclusiveBalanceAllotment):
wallet_context = WalletTransferContext(
wallet=instance.wallet, transfer=None)
passive_checksum, passive_amount, passive_marker = wallet_context.get_passive_values(
eon_number=instance.eon_number - 1)
return {
'eon_number': int(instance.eon_number),
'left': str_int(instance.left),
'right': str_int(instance.right),
'allotment_chain': long_string_to_list(instance.merkle_proof_hashes, 64),
'membership_chain': long_string_to_list(instance.merkle_membership_chain(), 64),
'values': csf_to_list(instance.merkle_proof_values, str_int),
'trail': int(instance.merkle_proof_trail),
'active_state_checksum':
encode_hex(instance.active_state.checksum()) if instance.active_state else
encode_hex(b'\0'*32),
'active_state':
ConciseActiveStateSerializer(
instance.active_state, read_only=True).data if instance.active_state else None,
'passive_checksum': encode_hex(passive_checksum),
'passive_amount': str_int(passive_amount),
'passive_marker': str_int(passive_marker)
}
def delegated_withdrawal(request):
signature = request.POST.get("signature")
wallet_address = request.POST.get("wallet")
amount = int(request.POST.get("amount"))
token = request.POST.get("token")
expiry = int(request.POST.get("expiry"))
message = [
crypto.address(wallet_address),
crypto.address(token),
crypto.uint256(amount),
crypto.uint256(expiry)
]
message = crypto.hash_array(message)
v, r, s = crypto.decode_signature(signature)
trust = crypto.verify_message_signature(crypto.address(wallet_address),
message, (v, r, s))
if not trust:
return Response(data="Signature is invalid", status=400)
wallet = Wallet.objects.filter(address=remove_0x_prefix(wallet_address),
token__address=token).get()
nc = NOCUSTContractInterface()
current_eon = nc.get_current_eon_number()
wallet_view_context = WalletTransferContext(wallet, None)
available_amount = wallet_view_context.loosely_available_funds_at_eon(
current_eon, current_eon, False, False)
if available_amount < amount:
return Response(data="Not enough funds", status=400)
nc.delegated_withdraw(token, wallet_address, amount, expiry,
crypto.uint256(r), crypto.uint256(s), v)
return Response(data="Ok", status=200)
def create(self, validated_data):
active_state_signature_data = validated_data.pop('debit_signature')
wallet = validated_data.pop('wallet')
recipient = validated_data.pop('recipient')
# get current eon
current_eon = LocalViewInterface.latest().eon_number()
# transfer eon should be the current eon number
if validated_data.pop('eon_number') != current_eon:
raise serializers.ValidationError(
detail='', code=ErrorCode.EON_NUMBER_OUT_OF_SYNC)
# TODO refactor this such that the recipient is only locked after the sender's details are verified
wallets = sorted([wallet, recipient], key=lambda w: w.trail_identifier)
with RootCommitment.read_write_lock(
suffix=current_eon, auto_renewal=False), wallets[0].lock(
auto_renewal=False), wallets[1].lock(auto_renewal=False):
if RootCommitment.objects.filter(eon_number=current_eon +
1).exists():
raise serializers.ValidationError(
detail='', code=ErrorCode.EON_NUMBER_OUT_OF_SYNC)
transfer = Transfer(wallet=wallet,
amount=validated_data.pop('amount'),
eon_number=current_eon,
recipient=recipient,
nonce=validated_data.pop('nonce'),
passive=True)
wallet_view_context = WalletTransferContext(wallet=wallet,
transfer=transfer)
recipient_view_context = WalletTransferContext(wallet=recipient,
transfer=transfer)
# Minimal SLA
if not wallet.is_sla_exempt() and not recipient.is_sla_exempt():
if not wallet.has_valid_sla():
sender_transfers_list = wallet_view_context.authorized_transfers_list(
only_appended=False, force_append=True)
if len(sender_transfers_list) > settings.SLA_THRESHOLD:
raise serializers.ValidationError(
detail='',
code=ErrorCode.DEBIT_WALLET_EXCEEDED_SLA)
elif not recipient.has_valid_sla():
recipient_transfers_list = recipient_view_context.authorized_transfers_list(
only_appended=False, force_append=True)
if len(recipient_transfers_list) > settings.SLA_THRESHOLD:
raise serializers.ValidationError(
detail='',
code=ErrorCode.CREDIT_WALLET_EXCEEDED_SLA)
# Ensure sender log consistency
can_append_to_sender_log = wallet_view_context.can_schedule_transfer(
)
if can_append_to_sender_log is not True:
raise serializers.ValidationError(
detail='Sender: {}'.format(can_append_to_sender_log),
code=ErrorCode.DEBIT_WALLET_CANNOT_ADD_TRANSACTION)
# Ensure recipient log consistency
can_append_to_recipient_log = recipient_view_context.can_schedule_transfer(
)
if can_append_to_recipient_log is not True:
raise serializers.ValidationError(
detail='Recipient: {}'.format(can_append_to_recipient_log),
code=ErrorCode.CREDIT_WALLET_CANNOT_ADD_TRANSACTION)
# Ensure transfer consistency
can_spend, currently_available_funds = wallet_view_context.can_send_transfer(
current_eon_number=current_eon,
using_only_appended_funds=False)
if can_spend is not True:
raise serializers.ValidationError(
detail=can_spend, code=ErrorCode.DEBIT_WALLET_OVERSPENDING)
# Validate data
concise_balance_marker_signature_data = validated_data.pop(
'debit_balance_signature')
concise_balance_marker_amount = validated_data.pop('debit_balance')
if concise_balance_marker_amount > currently_available_funds - transfer.amount:
raise serializers.ValidationError(
detail='',
code=ErrorCode.DEBIT_WALLET_BALANCE_MARKER_EXCEED_BALANCE)
concise_balance_marker = MinimumAvailableBalanceMarker(
wallet=wallet,
eon_number=transfer.eon_number,
amount=concise_balance_marker_amount)
concise_balance_marker_checksum = hex_value(
concise_balance_marker.checksum())
concise_balance_marker_signature = Signature(
wallet=transfer.wallet,
checksum=concise_balance_marker_checksum,
value=concise_balance_marker_signature_data.get('value'))
if not concise_balance_marker_signature.is_valid():
raise serializers.ValidationError(
detail='', code=ErrorCode.INVALID_DEBIT_BALANCE_SIGNATURE)
tx_set_tree = wallet_view_context.optimized_authorized_transfers_tree(
)
tx_set_hash = hex_value(tx_set_tree.root_hash())
transfer_index = tx_set_tree.merkle_tree_nonce_map.get(
transfer.nonce)
transfer_proof = tx_set_tree.proof(transfer_index)
highest_spendings, highest_gains = wallet_view_context.off_chain_actively_sent_received_amounts(
eon_number=transfer.eon_number, only_appended=False)
active_state = ActiveState(wallet=wallet,
updated_spendings=highest_spendings +
transfer.amount,
updated_gains=highest_gains,
tx_set_hash=tx_set_hash,
tx_set_proof_hashes=transfer_proof,
tx_set_index=transfer_index,
eon_number=transfer.eon_number)
checksum = hex_value(active_state.checksum())
active_state_signature = Signature(
wallet=transfer.wallet,
checksum=checksum,
value=active_state_signature_data.get('value'))
if not active_state_signature.is_valid():
raise serializers.ValidationError(
detail='', code=ErrorCode.INVALID_DEBIT_SIGNATURE)
transfer.position = recipient_view_context.off_chain_passively_received_amount(
eon_number=transfer.eon_number, only_appended=False)
# locking context covers saving the state as well to make sure checkpoint creation is consistent
with transaction.atomic():
Signature.objects.bulk_create(
[concise_balance_marker_signature, active_state_signature])
concise_balance_marker.signature = concise_balance_marker_signature
concise_balance_marker.save()
active_state.wallet_signature = active_state_signature
active_state.operator_signature = active_state.sign_active_state(
settings.HUB_OWNER_ACCOUNT_ADDRESS,
settings.HUB_OWNER_ACCOUNT_KEY)
active_state.save()
transfer.sender_active_state = active_state
transfer.sender_balance_marker = concise_balance_marker
# cache transfer index in sender active set
transfer.sender_merkle_index = transfer_index
# transfer.sender_merkle_root_cache = tx_set_hash
# cache active set merkle mountains height array and hash array for recipient active set
transfer.sender_merkle_hash_cache, transfer.sender_merkle_height_cache = tx_set_tree.merkle_cache_stacks(
)
transfer.complete = True
transfer.appended = True
transfer.processed = True
transfer.save()
if transfer.appended:
operator_celery.send_task('auditor.tasks.on_transfer_confirmation',
args=[transfer.id])
return transfer
def check_active_state_signature(swap,
wallet,
active_state_signature_data,
is_future_state,
starting_balance,
highest_spendings,
highest_gains,
signature_type=None):
wallet_view_context = WalletTransferContext(wallet=wallet, transfer=swap)
# fulfillment active state
if signature_type == SignatureType.FULFILLMENT:
swap.processed, swap.complete = True, True
if is_future_state:
# done for all future eons
# assumes this is the only TX in set
tx_set_tree = WalletTransferContext.optimized_authorized_transfers_tree_from_list(
[
swap.shorthand(wallet_view_context,
is_last_transfer=True,
starting_balance=starting_balance)
])
else:
# done once for current eon
tx_set_tree = wallet_view_context.optimized_authorized_transfers_tree()
# fulfillment active state
if signature_type == SignatureType.FULFILLMENT:
swap.processed, swap.complete = False, False
tx_set_hash = crypto.hex_value(tx_set_tree.root_hash())
transfer_index = tx_set_tree.merkle_tree_nonce_map.get(swap.nonce)
transfer_proof = tx_set_tree.proof(transfer_index)
# debit active state
if signature_type == SignatureType.DEBIT:
updated_spendings = highest_spendings + swap.amount
updated_gains = highest_gains
state_name = "Debit"
# credit active state
elif signature_type == SignatureType.CREDIT:
updated_spendings = highest_spendings
updated_gains = highest_gains
state_name = "Credit"
# fulfillment active state
elif signature_type == SignatureType.FULFILLMENT:
updated_spendings = highest_spendings
updated_gains = highest_gains + swap.amount_swapped
state_name = "Fulfillment"
active_state = ActiveState(wallet=wallet,
updated_spendings=updated_spendings,
updated_gains=updated_gains,
tx_set_hash=tx_set_hash,
tx_set_proof_hashes=transfer_proof,
tx_set_index=transfer_index,
eon_number=swap.eon_number)
active_state_checksum = crypto.hex_value(active_state.checksum())
active_state_signature = Signature(
wallet=wallet,
checksum=active_state_checksum,
value=active_state_signature_data.get('value'))
if not active_state_signature.is_valid():
error_code = None
if signature_type == SignatureType.CREDIT:
error_code = ErrorCode.INVALID_FUTURE_CREDIT_SIGNATURE if is_future_state else ErrorCode.INVALID_CREDIT_SIGNATURE
elif signature_type == SignatureType.DEBIT:
error_code = ErrorCode.INVALID_FUTURE_DEBIT_SIGNATURE if is_future_state else ErrorCode.INVALID_DEBIT_SIGNATURE
elif signature_type == SignatureType.FULFILLMENT:
error_code = ErrorCode.INVALID_FUTURE_CREDIT_FULFILLMENT_SIGNATURE if is_future_state else ErrorCode.INVALID_CREDIT_FULFILLMENT_SIGNATURE
raise serializers.ValidationError(
'Active state signature failed for eon {}'.format(swap.eon_number),
code=error_code)
return active_state, active_state_signature, transfer_index, tx_set_tree.merkle_cache_stacks(
)
def should_void_swap(swap: Transfer,
wallet_view_context: WalletTransferContext,
recipient_view_context: WalletTransferContext,
operator_eon_number: int, is_checkpoint_created: bool):
if not settings.SWAPS_ENABLED:
logger.error('Swaps disabled. Voiding {}'.format(swap.id))
return True
if swap.amount < 1:
logger.error('Swap {} has less than 1 amount'.format(swap.id))
return True
if swap.amount_swapped < 1:
logger.error('Swap {} has less than 1 amount swapped'.format(swap.id))
return True
# Unauthorized transfer
if swap.sender_active_state is None:
logger.error('Swap {} no authorization'.format(swap.id))
return True
# Invalid signature by sender
if not swap.sender_active_state.wallet_signature.is_valid():
logger.error('Swap {} invalid sender signature.'.format(swap.id))
return True
# Unreceived transaction
if swap.recipient_active_state is None:
logger.error('Swap receipt for {} not provided.'.format(swap.id))
return True
# Invalid signature by recipient
if not swap.recipient_active_state.wallet_signature.is_valid():
logger.error('Swap {} invalid receipt signature.'.format(swap.id))
return True
# Ensure log consistency
can_append_to_sender_log = wallet_view_context.can_append_transfer()
if can_append_to_sender_log is not True:
logger.error('Sender: {}'.format(can_append_to_sender_log))
return True
can_append_to_recipient_log = recipient_view_context.can_append_transfer()
if can_append_to_recipient_log is not True:
logger.error('Recipient: {}'.format(can_append_to_recipient_log))
return True
# Skip consistency checks since they were done at least once before.
if swap.appended:
return False
# Overspending
sender_funds_remaining = wallet_view_context.loosely_available_funds_at_eon(
eon_number=swap.eon_number,
current_eon_number=operator_eon_number,
is_checkpoint_created=is_checkpoint_created,
only_appended=True)
# sender remaining funds should be more than remaining amount in order
matched_out, matched_in = swap.matched_amounts(all_eons=True)
if sender_funds_remaining < swap.amount - matched_out:
logger.error('Swap {} overspending.'.format(swap.id))
return True
# Prevent future overdrawing
# if swap.sender_balance_marker.amount > sender_funds_remaining - swap.amount:
if swap.sender_balance_marker.amount != 0:
logger.error('Swap {} invalid concise marker balance.'.format(swap.id))
return True
concise_balance_marker = MinimumAvailableBalanceMarker(
wallet=swap.wallet,
eon_number=swap.eon_number,
amount=swap.sender_balance_marker.amount)
concise_balance_marker_checksum = crypto.hex_value(
concise_balance_marker.checksum())
if swap.sender_balance_marker.signature.checksum != concise_balance_marker_checksum:
logger.error('Swap {} invalid concise marker checksum for {}.'.format(
swap.id, swap.sender_balance_marker.amount))
return True
highest_spendings, highest_gains = wallet_view_context.off_chain_actively_sent_received_amounts(
eon_number=swap.eon_number, only_appended=True)
# if this is a multi eon swap
if Transfer.objects.filter(eon_number=swap.eon_number - 1,
tx_id=swap.tx_id).exists():
# set balances to initial fixed balances stored in transfer eon state
sender_starting_balance = swap.sender_starting_balance
recipient_starting_balance = swap.recipient_starting_balance
# make sure this eon's starting balance is exactly the initial stored balance
# when matched amount is taken into consideration for both sender and receiver
if wallet_view_context.starting_balance_in_eon(
swap.eon_number) != sender_starting_balance - matched_out:
logger.error(
'Swap {} invalid sender starting balance of future state {} != {} - {}.'
.format(
swap.id,
wallet_view_context.starting_balance_in_eon(
swap.eon_number), sender_starting_balance,
matched_out))
if recipient_view_context.starting_balance_in_eon(
swap.eon_number) != recipient_starting_balance + matched_in:
logger.error(
'Swap {} invalid recipient starting balance of future state {} != {} + {}.'
.format(
swap.id,
recipient_view_context.starting_balance_in_eon(
swap.eon_number), recipient_starting_balance,
matched_out))
assert (wallet_view_context.starting_balance_in_eon(
swap.eon_number) == sender_starting_balance - matched_out)
assert (recipient_view_context.starting_balance_in_eon(
swap.eon_number) == recipient_starting_balance + matched_in)
else:
sender_starting_balance = int(
wallet_view_context.starting_balance_in_eon(swap.eon_number))
recipient_starting_balance = int(
recipient_view_context.starting_balance_in_eon(swap.eon_number))
# Debit Authorization
tx_set_tree = wallet_view_context.optimized_authorized_transfers_tree(
only_appended=True, starting_balance=sender_starting_balance)
tx_set_hash = crypto.hex_value(tx_set_tree.root_hash())
transfer_index = tx_set_tree.merkle_tree_nonce_map.get(swap.nonce)
transfer_proof = tx_set_tree.proof(transfer_index)
highest_spendings, highest_gains = wallet_view_context.off_chain_actively_sent_received_amounts(
eon_number=swap.eon_number, only_appended=True)
debiting_active_state = ActiveState(wallet=swap.wallet,
updated_spendings=highest_spendings +
swap.amount,
updated_gains=highest_gains,
tx_set_hash=tx_set_hash,
tx_set_proof_hashes=transfer_proof,
tx_set_index=transfer_index,
eon_number=swap.eon_number)
debiting_active_state_checksum = crypto.hex_value(
debiting_active_state.checksum())
if swap.sender_active_state.wallet_signature.checksum != debiting_active_state_checksum:
logger.error('Swap {} invalid debit active state checksum.'.format(
swap.id))
return True
# Credit Authorization
tx_set_tree = recipient_view_context.optimized_authorized_transfers_tree(
only_appended=True, starting_balance=recipient_starting_balance)
tx_set_hash = crypto.hex_value(tx_set_tree.root_hash())
transfer_index = tx_set_tree.merkle_tree_nonce_map.get(swap.nonce)
transfer_proof = tx_set_tree.proof(transfer_index)
highest_spendings, highest_gains = recipient_view_context.off_chain_actively_sent_received_amounts(
eon_number=swap.eon_number, only_appended=True)
crediting_active_state = ActiveState(wallet=swap.recipient,
updated_spendings=highest_spendings,
updated_gains=highest_gains,
tx_set_hash=tx_set_hash,
tx_set_proof_hashes=transfer_proof,
tx_set_index=transfer_index,
eon_number=swap.eon_number)
crediting_active_state_checksum = crypto.hex_value(
crediting_active_state.checksum())
if swap.recipient_active_state.wallet_signature.checksum != crediting_active_state_checksum:
logger.error('Swap {} invalid credit active state checksum.'.format(
swap.id))
return True
# Finality Authorization
swap.complete = True
tx_set_tree = recipient_view_context.optimized_authorized_transfers_tree(
only_appended=True, starting_balance=recipient_starting_balance)
swap.complete = False
tx_set_hash = crypto.hex_value(tx_set_tree.root_hash())
transfer_index = tx_set_tree.merkle_tree_nonce_map.get(swap.nonce)
transfer_proof = tx_set_tree.proof(transfer_index)
recipient_fulfillment_active_state = ActiveState(
wallet=swap.recipient,
updated_spendings=highest_spendings,
updated_gains=highest_gains + swap.amount_swapped,
tx_set_hash=tx_set_hash,
tx_set_proof_hashes=transfer_proof,
tx_set_index=transfer_index,
eon_number=swap.eon_number)
recipient_fulfillment_active_state_checksum = crypto.hex_value(
recipient_fulfillment_active_state.checksum())
if swap.recipient_fulfillment_active_state.wallet_signature.checksum != recipient_fulfillment_active_state_checksum:
logger.error(
'Swap {} invalid finalization active state checksum.'.format(
swap.id))
return True
return False
def send_transaction(test_case,
eon_number,
sender,
recipient,
amount,
nonce,
token,
expected_status=status.HTTP_201_CREATED):
# Sender account
sender_wallet = Wallet.objects.get(address=remove_0x_prefix(
sender.get('address')),
token=token)
# Recipient account
recipient_wallet = Wallet.objects.get(address=remove_0x_prefix(
recipient.get('address')),
token=token)
transfer = Transfer(wallet=sender_wallet,
amount=amount,
eon_number=eon_number,
recipient=recipient_wallet,
nonce=nonce,
passive=True)
sender_view_context = WalletTransferContext(wallet=sender_wallet,
transfer=transfer)
sender_highest_spent, sender_highest_gained = sender_view_context.off_chain_actively_sent_received_amounts(
eon_number=eon_number, only_appended=False)
updated_spendings = sender_highest_spent + amount
# Authorize transaction
transfer_set_root = hex_value(
sender_view_context.authorized_transfers_tree_root(only_appended=False,
force_append=True))
active_state = ActiveState(wallet=sender_wallet,
updated_spendings=updated_spendings,
updated_gains=sender_highest_gained,
eon_number=eon_number,
tx_set_hash=transfer_set_root)
sender_active_state_authorization = sign_message(active_state.checksum(),
sender.get('pk'))
sender_active_state_signature = Signature(
wallet=sender_wallet,
checksum=hex_value(active_state.checksum()),
value=encode_signature(sender_active_state_authorization))
test_case.assertTrue(sender_active_state_signature.is_valid())
_, available_balance = sender_view_context.can_send_transfer(
current_eon_number=eon_number, using_only_appended_funds=False)
new_balance = available_balance - transfer.amount
concise_balance_marker = MinimumAvailableBalanceMarker(
wallet=sender_wallet, eon_number=eon_number, amount=new_balance)
sender_concise_balance_marker_authorization = sign_message(
concise_balance_marker.checksum(), sender.get('pk'))
concise_balance_marker_signature = Signature(
wallet=sender_wallet,
checksum=hex_value(concise_balance_marker.checksum()),
value=encode_signature(sender_concise_balance_marker_authorization))
test_case.assertTrue(concise_balance_marker_signature.is_valid())
print("Sender view:")
print("available_balance:", available_balance)
print("transfer_set_root:", transfer_set_root)
print("active_state.updated_spendings:", active_state.updated_spendings)
print("active_state.updated_gains:", active_state.updated_gains)
# Make API Request
url = reverse('transfer-endpoint')
data = {
'debit_signature': {
'value': encode_signature(sender_active_state_authorization),
},
'debit_balance_signature': {
'value':
encode_signature(sender_concise_balance_marker_authorization),
},
'debit_balance': new_balance,
'eon_number': eon_number,
'amount': amount,
'nonce': nonce,
'wallet': {
'address': sender_wallet.address,
'token': sender_wallet.token.address,
},
'recipient': {
'address': recipient_wallet.address,
'token': recipient_wallet.token.address,
},
}
# Send tx to server
x = datetime.datetime.now()
response = test_case.client.post(url, data, format='json')
y = datetime.datetime.now()
delta = y - x
# Ensure the transaction was recorded
test_case.assertEqual(response.status_code, expected_status,
'\n'.join([url,
str(data),
str(response.content)]))
print('TX Time: {}s for {}'.format(delta, amount))
# fo rpassive transfer assert that transaction is confirmed
tx = json.loads(response.content)
transfer = Transfer.objects.get(id=tx['id'])
test_case.assertTrue(transfer.complete)
test_case.assertTrue(transfer.appended)
test_case.assertNotEqual(transfer.sender_active_state.operator_signature,
None)
# Log time delta
return delta
def update(self, swap, validated_data):
current_swap = None
is_swap_cancelled = False
with transaction.atomic():
current_eon = LocalViewInterface.latest().eon_number()
swap_set = Transfer.objects.select_for_update().filter(
tx_id=swap.tx_id, eon_number__gte=current_eon,
swap=True).order_by('eon_number')
current_swap = swap_set[0]
if not current_swap.cancelled:
raise serializers.ValidationError(
detail='', code=ErrorCode.SWAP_NOT_FROZEN)
elif current_swap.processed:
raise serializers.ValidationError(
detail='', code=ErrorCode.SWAP_ALREADY_CLOSED)
elif current_swap.swap_freezing_signature is None:
raise serializers.ValidationError(
detail='', code=ErrorCode.MISSING_FREEZING_SIGNATURE)
elif None not in [
current_swap.sender_cancellation_active_state,
current_swap.recipient_cancellation_active_state
]:
raise serializers.ValidationError(
detail='', code=ErrorCode.SWAP_ALREADY_CANCELLED)
sender_cancellation_signatures = validated_data.get(
'sender_cancellation_signature')
recipient_cancellation_signatures = validated_data.get(
'recipient_cancellation_signature')
# state to save
sender_cancellation_active_state_signature_records = []
sender_cancellation_active_state_records = []
recipient_cancellation_active_state_signature_records = []
recipient_cancellation_active_state_records = []
# make sure appropriate number of signatures was provided
if swap_set.count() != len(sender_cancellation_signatures):
raise serializers.ValidationError(
detail=
'Wrong number of sender cancellation signatures, expected {} but got {}'
.format(swap_set.count(),
len(sender_cancellation_signatures)),
code=ErrorCode.WRONG_NUMBER_OF_DEBIT_SIGNATURES)
if swap_set.count() != len(recipient_cancellation_signatures):
raise serializers.ValidationError(
detail=
'Wrong number of recipient cancellation signatures, expected {} but got {}'
.format(swap_set.count(),
len(recipient_cancellation_signatures)),
code=ErrorCode.WRONG_NUMBER_OF_CREDIT_SIGNATURES)
sender_view_context = WalletTransferContext(
wallet=current_swap.wallet, transfer=current_swap)
debit_tx_set_tree = sender_view_context.optimized_authorized_transfers_tree(
force_append=False, assume_active_state_exists=True)
tx_set_hash = crypto.hex_value(debit_tx_set_tree.root_hash())
transfer_index = debit_tx_set_tree.merkle_tree_nonce_map.get(
current_swap.nonce)
transfer_proof = debit_tx_set_tree.proof(transfer_index)
sender_highest_spendings, sender_highest_gains = sender_view_context.off_chain_actively_sent_received_amounts(
eon_number=current_swap.eon_number, only_appended=False)
matched_out, _ = current_swap.matched_amounts()
sender_highest_gains += current_swap.amount - matched_out
sender_cancellation_active_state = ActiveState(
wallet=current_swap.wallet,
updated_spendings=sender_highest_spendings,
updated_gains=sender_highest_gains,
tx_set_hash=tx_set_hash,
tx_set_proof_hashes=transfer_proof,
tx_set_index=transfer_index,
eon_number=current_swap.eon_number)
sender_cancellation_active_state_checksum = crypto.hex_value(
sender_cancellation_active_state.checksum())
sender_cancellation_active_state_signature = Signature(
wallet=current_swap.wallet,
checksum=sender_cancellation_active_state_checksum,
value=sender_cancellation_signatures[0].get('value'))
if not sender_cancellation_active_state_signature.is_valid():
raise serializers.ValidationError(
detail='', code=ErrorCode.INVALID_DEBIT_SIGNATURE)
sender_cancellation_active_state_records.append(
sender_cancellation_active_state)
sender_cancellation_active_state_signature_records.append(
sender_cancellation_active_state_signature)
recipient_view_context = WalletTransferContext(
wallet=current_swap.recipient, transfer=current_swap)
credit_tx_set_tree = recipient_view_context.optimized_authorized_transfers_tree(
force_append=False, assume_active_state_exists=True)
tx_set_hash = crypto.hex_value(credit_tx_set_tree.root_hash())
transfer_index = credit_tx_set_tree.merkle_tree_nonce_map.get(
current_swap.nonce)
transfer_proof = credit_tx_set_tree.proof(transfer_index)
recipient_highest_spendings, recipient_highest_gains = recipient_view_context.off_chain_actively_sent_received_amounts(
eon_number=current_swap.eon_number, only_appended=False)
recipient_cancellation_active_state = ActiveState(
wallet=current_swap.recipient,
updated_spendings=recipient_highest_spendings +
current_swap.amount_swapped,
updated_gains=recipient_highest_gains +
current_swap.amount_swapped,
tx_set_hash=tx_set_hash,
tx_set_proof_hashes=transfer_proof,
tx_set_index=transfer_index,
eon_number=current_swap.eon_number)
recipient_cancellation_active_state_checksum = crypto.hex_value(
recipient_cancellation_active_state.checksum())
recipient_cancellation_active_state_signature = Signature(
wallet=current_swap.recipient,
checksum=recipient_cancellation_active_state_checksum,
value=recipient_cancellation_signatures[0].get('value'))
if not recipient_cancellation_active_state_signature.is_valid():
raise serializers.ValidationError(
detail='', code=ErrorCode.INVALID_CREDIT_SIGNATURE)
recipient_cancellation_active_state_records.append(
recipient_cancellation_active_state)
recipient_cancellation_active_state_signature_records.append(
recipient_cancellation_active_state_signature)
# calculate future spent, gained, empty tx set
empty_tx_set_hash = crypto.hex_value(NODE_CACHE[0]['hash'])
sender_future_spent_gained = max(sender_highest_spendings,
sender_highest_gains) + 1
recipient_future_spent_gained = max(
recipient_highest_spendings,
recipient_highest_gains) + current_swap.amount_swapped + 1
for index in range(1, len(swap_set)):
future_swap = swap_set[index]
sender_cancellation_active_state = ActiveState(
wallet=future_swap.wallet,
updated_spendings=sender_future_spent_gained,
updated_gains=sender_future_spent_gained,
tx_set_hash=empty_tx_set_hash,
# any dummy value
tx_set_proof_hashes='',
# any dummy value
tx_set_index=0,
eon_number=future_swap.eon_number)
sender_cancellation_active_state_checksum = crypto.hex_value(
sender_cancellation_active_state.checksum())
sender_cancellation_active_state_signature = Signature(
wallet=future_swap.recipient,
checksum=sender_cancellation_active_state_checksum,
value=sender_cancellation_signatures[index].get('value'))
if not sender_cancellation_active_state_signature.is_valid():
raise serializers.ValidationError(
detail='',
code=ErrorCode.INVALID_FUTURE_DEBIT_SIGNATURE)
sender_cancellation_active_state_signature_records.append(
sender_cancellation_active_state_signature)
sender_cancellation_active_state_records.append(
sender_cancellation_active_state)
recipient_cancellation_active_state = ActiveState(
wallet=future_swap.recipient,
updated_spendings=recipient_future_spent_gained,
updated_gains=recipient_future_spent_gained,
tx_set_hash=empty_tx_set_hash,
# any dummy value
tx_set_proof_hashes='',
# any dummy value
tx_set_index=0,
eon_number=future_swap.eon_number)
recipient_cancellation_active_state_checksum = crypto.hex_value(
recipient_cancellation_active_state.checksum())
recipient_cancellation_active_state_signature = Signature(
wallet=future_swap.recipient,
checksum=recipient_cancellation_active_state_checksum,
value=recipient_cancellation_signatures[index].get(
'value'))
if not recipient_cancellation_active_state_signature.is_valid(
):
raise serializers.ValidationError(
detail='',
code=ErrorCode.INVALID_FUTURE_CREDIT_SIGNATURE)
recipient_cancellation_active_state_signature_records.append(
recipient_cancellation_active_state_signature)
recipient_cancellation_active_state_records.append(
recipient_cancellation_active_state)
assert (len(swap_set) == len(
sender_cancellation_active_state_signature_records))
assert (len(swap_set) == len(
recipient_cancellation_active_state_signature_records))
Signature.objects.bulk_create(
sender_cancellation_active_state_signature_records +
recipient_cancellation_active_state_signature_records)
with current_swap.lock(
auto_renewal=False), current_swap.wallet.lock(
auto_renewal=False), current_swap.recipient.lock(
auto_renewal=False):
for index in range(len(swap_set)):
sender_cancellation_active_state_records[
index].wallet_signature = sender_cancellation_active_state_signature_records[
index]
recipient_cancellation_active_state_records[
index].wallet_signature = recipient_cancellation_active_state_signature_records[
index]
ActiveState.objects.bulk_create(
sender_cancellation_active_state_records +
recipient_cancellation_active_state_records)
for index in range(len(swap_set)):
swap_set[
index].sender_cancellation_active_state = sender_cancellation_active_state_records[
index]
swap_set[
index].recipient_cancellation_active_state = recipient_cancellation_active_state_records[
index]
if index > 0:
swap_set[index].voided = True
swap_set[index].appended = False
swap_set[index].processed = True
Transfer.objects.bulk_update(swap_set, [
'sender_cancellation_active_state',
'recipient_cancellation_active_state', 'voided',
'appended', 'processed'
])
swap_set[0].sign_swap_cancellation(
settings.HUB_OWNER_ACCOUNT_ADDRESS,
settings.HUB_OWNER_ACCOUNT_KEY)
swap_set[0].close(cancelled=True, appended=True)
current_swap = swap_set[0]
is_swap_cancelled = True
if is_swap_cancelled:
operator_celery.send_task('auditor.tasks.on_swap_cancellation',
args=[current_swap.id])
return current_swap
def should_void_transfer(transfer, wallet_view_context: WalletTransferContext,
recipient_view_context: WalletTransferContext,
operator_eon_number, is_checkpoint_created):
if transfer.eon_number != operator_eon_number and is_checkpoint_created:
logger.error('Transfer {} eon mismatch ({}, {})'.format(
transfer.id, transfer.eon_number, operator_eon_number))
return True
if transfer.amount < 0:
logger.error('Transfer {} has negative amount'.format(transfer.id))
return True
# Unauthorized transfer
if transfer.sender_active_state is None:
logger.error('Transfer {} no authorization'.format(transfer.id))
return True
# Invalid signature by sender
if not transfer.sender_active_state.wallet_signature.is_valid():
logger.error('Transfer {} invalid sender signature.'.format(
transfer.id))
return True
# Ensure sender log consistency
can_append_to_sender_log = wallet_view_context.can_append_transfer()
if can_append_to_sender_log is not True:
logger.error('Sender: {}'.format(can_append_to_sender_log))
return True
# Ensure recipient log consistency
can_append_to_recipient_log = recipient_view_context.can_append_transfer()
if can_append_to_recipient_log is not True:
logger.error('Recipient: {}'.format(can_append_to_recipient_log))
return True
# Ensure transfer consistency
can_spend, currently_available_funds = wallet_view_context.can_send_transfer(
current_eon_number=operator_eon_number, using_only_appended_funds=True)
if can_spend is not True:
passively_received = wallet_view_context.off_chain_passively_received_amount(
eon_number=operator_eon_number, only_appended=True)
logger.error(can_spend)
logger.info(passively_received)
return True
last_active_transfer, last_active_transfer_is_outgoing = wallet_view_context.last_appended_active_transfer(
operator_eon_number)
last_active_state = WalletTransferContext.appropriate_transfer_active_state(
transfer=last_active_transfer,
is_outgoing=last_active_transfer_is_outgoing)
previous_spendings = last_active_state.updated_spendings if last_active_transfer else 0
updated_spendings = transfer.sender_active_state.updated_spendings
# Incorrect updated spendings
if last_active_transfer:
if updated_spendings != previous_spendings + transfer.amount:
logger.error(
'Transfer {} invalid updated spendings. Expected {}, found {}.'
.format(transfer.id, previous_spendings + transfer.amount,
updated_spendings))
return True
elif updated_spendings != transfer.amount:
logger.error(
'Transfer {} invalid initial spendings. Expected {}, found {}.'.
format(transfer.id, transfer.amount, updated_spendings))
return True
# Incorrect transfer position
last_passively_received = recipient_view_context.last_appended_incoming_passive_transfer(
operator_eon_number)
if last_passively_received:
if transfer.position != last_passively_received.position + last_passively_received.amount:
logger.error(
'Transfer {} invalid offset. Expected {}, found {}.'.format(
transfer.id, last_passively_received.position +
last_passively_received.amount, transfer.position))
return True
elif transfer.position != 0:
logger.error(
'Transfer {} invalid offset. Expected {}, found {}.'.format(
transfer.id, 0, transfer.position))
return True
if transfer.sender_balance_marker.amount > currently_available_funds - transfer.amount:
logger.error('Transfer {} invalid concise marker balance.'.format(
transfer.id))
return True
concise_balance_marker = MinimumAvailableBalanceMarker(
wallet=transfer.wallet,
eon_number=transfer.eon_number,
amount=transfer.sender_balance_marker.amount)
concise_balance_marker_checksum = hex_value(
concise_balance_marker.checksum())
if transfer.sender_balance_marker.signature.checksum != concise_balance_marker_checksum:
logger.error(
'Transfer {} invalid concise marker checksum worth: {}'.format(
transfer.id, currently_available_funds - transfer.amount))
passively_received = wallet_view_context.off_chain_passively_received_amount(
eon_number=operator_eon_number, only_appended=True)
logger.info(passively_received)
return True
return False
def update(self, swap, validated_data):
current_swap = None
is_swap_finalized = False
with transaction.atomic():
current_eon = LocalViewInterface.latest().eon_number()
swap_set = Transfer.objects.select_for_update().filter(
tx_id=swap.tx_id, eon_number__gte=current_eon,
swap=True).order_by('eon_number')
current_swap = swap_set[0]
if not current_swap.complete:
raise serializers.ValidationError(
detail='', code=ErrorCode.SWAP_NOT_FULFILLED)
elif current_swap.cancelled:
raise serializers.ValidationError(
detail='', code=ErrorCode.SWAP_ALREADY_FROZEN)
elif current_swap.voided:
raise serializers.ValidationError(
detail='', code=ErrorCode.SWAP_ALREADY_VOIDED)
elif current_swap.processed:
raise serializers.ValidationError(
detail='', code=ErrorCode.SWAP_ALREADY_CLOSED)
elif current_swap.recipient_finalization_active_state is not None:
raise serializers.ValidationError(
detail='', code=ErrorCode.SWAP_ALREADY_FINALIZED)
finalization_signatures = validated_data.pop(
'finalization_signature')
# state to save
finalization_active_state_signature_records = []
finalization_active_state_records = []
if swap_set.count() != len(finalization_signatures):
raise serializers.ValidationError(
detail=
'Wrong number of finalization signatures, expected {} but got {}'
.format(swap_set.count(), len(finalization_signatures)),
code=ErrorCode.WRONG_NUMBER_OF_CREDIT_SIGNATURES)
recipient_view_context = WalletTransferContext(
wallet=current_swap.recipient, transfer=current_swap)
tx_set_tree = recipient_view_context.optimized_authorized_transfers_tree(
)
tx_set_hash = crypto.hex_value(tx_set_tree.root_hash())
transfer_index = tx_set_tree.merkle_tree_nonce_map.get(
current_swap.nonce)
transfer_proof = tx_set_tree.proof(transfer_index)
highest_spendings, highest_gains = recipient_view_context.off_chain_actively_sent_received_amounts(
eon_number=current_swap.eon_number, only_appended=False)
finalization_active_state = ActiveState(
wallet=current_swap.recipient,
updated_spendings=highest_spendings +
current_swap.amount_swapped,
updated_gains=highest_gains + current_swap.amount_swapped,
tx_set_hash=tx_set_hash,
tx_set_proof_hashes=transfer_proof,
tx_set_index=transfer_index,
eon_number=current_swap.eon_number)
finalization_active_state_signature_data = finalization_signatures[
0]
finalization_active_state_checksum = crypto.hex_value(
finalization_active_state.checksum())
finalization_active_state_signature = Signature(
wallet=current_swap.recipient,
checksum=finalization_active_state_checksum,
value=finalization_active_state_signature_data.get('value'))
if not finalization_active_state_signature.is_valid():
raise serializers.ValidationError(
detail='', code=ErrorCode.INVALID_CREDIT_SIGNATURE)
finalization_active_state_signature_records.append(
finalization_active_state_signature)
finalization_active_state_records.append(finalization_active_state)
# calculate future spent, gained, empty tx set
future_spent_gained = max(highest_spendings,
highest_gains) + swap.amount_swapped + 1
empty_tx_set_hash = crypto.hex_value(NODE_CACHE[0]['hash'])
for index in range(1, len(swap_set)):
future_swap = swap_set[index]
finalization_active_state = ActiveState(
wallet=future_swap.recipient,
updated_spendings=future_spent_gained,
updated_gains=future_spent_gained,
tx_set_hash=empty_tx_set_hash,
# any dummy value
tx_set_proof_hashes='',
# any dummy value
tx_set_index=0,
eon_number=future_swap.eon_number)
finalization_active_state_checksum = crypto.hex_value(
finalization_active_state.checksum())
finalization_active_state_signature = Signature(
wallet=swap.recipient,
checksum=finalization_active_state_checksum,
value=finalization_signatures[index].get('value'))
if not finalization_active_state_signature.is_valid():
raise serializers.ValidationError(
detail='',
code=ErrorCode.INVALID_FUTURE_CREDIT_SIGNATURE)
finalization_active_state_signature_records.append(
finalization_active_state_signature)
finalization_active_state_records.append(
finalization_active_state)
Signature.objects.bulk_create(
finalization_active_state_signature_records)
with current_swap.lock(
auto_renewal=False), current_swap.wallet.lock(
auto_renewal=False), current_swap.recipient.lock(
auto_renewal=False):
for index in range(len(finalization_active_state_records)):
finalization_active_state_records[
index].wallet_signature = finalization_active_state_signature_records[
index]
ActiveState.objects.bulk_create(
finalization_active_state_records)
for index in range(len(swap_set)):
swap_set[
index].recipient_finalization_active_state = finalization_active_state_records[
index]
if index > 0:
swap_set[index].voided = True
swap_set[index].appended = False
swap_set[index].processed = True
Transfer.objects.bulk_update(swap_set, [
'recipient_finalization_active_state', 'voided',
'appended', 'processed'
])
swap_set[0].sign_swap_finalization(
settings.HUB_OWNER_ACCOUNT_ADDRESS,
settings.HUB_OWNER_ACCOUNT_KEY)
swap_set[0].close(complete=True, appended=True)
current_swap = swap_set[0]
is_swap_finalized = True
if is_swap_finalized:
operator_celery.send_task('auditor.tasks.on_swap_finalization',
args=[current_swap.id])
return current_swap
def init_swap_challenge(test_case: RPCTestCase, swap: Transfer, eon_number):
sender_transfer_context = WalletTransferContext(wallet=swap.wallet,
transfer=None)
if Transfer.objects.filter(eon_number=swap.eon_number - 1,
tx_id=swap.tx_id).exists():
starting_balance = int(swap.sender_starting_balance)
else:
starting_balance = int(
sender_transfer_context.starting_balance_in_eon(eon_number))
transfers_list_nonce_index_map = {}
transfers_list = sender_transfer_context.authorized_transfers_list_shorthand(
only_appended=True,
force_append=False,
eon_number=eon_number,
last_transfer_is_finalized=True,
index_map=transfers_list_nonce_index_map,
starting_balance=starting_balance)
sender_active_state = sender_transfer_context.last_appended_active_state(
eon_number=eon_number)
transfer_tree = TransactionMerkleTree(transfers_list)
transfer_index = transfers_list_nonce_index_map.get(int(swap.nonce))
transfer_node = transfer_tree.merkle_tree_leaf_map.get(transfer_index)
transfer_proof = [
node.get('hash')
for node in calculate_merkle_proof(transfer_index, transfer_node)
]
test_case.assertEqual(sender_active_state.tx_set_hash,
crypto.hex_value(transfer_tree.root_hash()))
tx_set_root = crypto.zfill(
crypto.decode_hex(sender_active_state.tx_set_hash))
deltas = [
int(sender_active_state.updated_spendings),
int(sender_active_state.updated_gains)
]
test_case.assertTrue(
test_case.contract_interface.check_merkle_membership_proof(
trail=int(transfer_index),
chain=[crypto.zfill(x) for x in transfer_proof],
node=transfer_node.get('hash'),
merkle_root=tx_set_root))
token_commitment = TokenCommitment.objects.get(
token=swap.wallet.token, root_commitment__eon_number=eon_number + 1)
v, r, s = sender_active_state.operator_signature.vrs()
# swap_sender_balance = sender_transfer_context.balance_as_of_eon(
# eon_number)
sender_balance = sender_transfer_context.balance_as_of_eon(eon_number + 1)
passive_checksum, passive_amount, passive_marker = sender_transfer_context.get_passive_values(
eon_number=eon_number + 1)
swap_order = [
int(swap.amount), # sell
int(swap.amount_swapped), # buy
# int(swap_sender_balance.right - swap_sender_balance.left),
starting_balance, # balance
int(swap.nonce)
] # nonce
chain_transition_checksum = test_case.contract_interface.check_proof_of_transition_agreement(
token_address=swap.wallet.token.address,
holder=swap.wallet.address,
trail_identifier=swap.wallet.trail_identifier,
eon_number=eon_number,
tx_set_root=tx_set_root,
deltas=deltas,
attester=settings.HUB_OWNER_ACCOUNT_ADDRESS,
r=crypto.uint256(r),
s=crypto.uint256(s),
v=v)
test_case.assertEqual(crypto.hex_value(sender_active_state.checksum()),
crypto.hex_value(chain_transition_checksum))
node_hash = merkle_tree.leaf_hash(
merkle_tree.wallet_leaf_inner_hash, {
'contract': settings.HUB_LQD_CONTRACT_ADDRESS,
'token': swap.wallet.token.address,
'wallet': swap.wallet.address,
'left': sender_balance.left,
'right': sender_balance.right,
'active_state_checksum': sender_active_state.checksum(),
'passive_checksum': passive_checksum,
'passive_amount': passive_amount,
'passive_marker': passive_marker,
})
checkpoint = RootCommitment.objects.get(eon_number=eon_number + 1)
test_case.contract_interface.check_exclusive_allotment_proof(
allotment_trail=int(sender_balance.merkle_proof_trail),
membership_trail=swap.wallet.token.trail,
node=node_hash,
merkle_root=crypto.decode_hex(checkpoint.merkle_root),
allotment_chain=[
crypto.zfill(crypto.decode_hex(v)) for v in long_string_to_list(
sender_balance.merkle_proof_hashes, 64)
],
membership_chain=[
crypto.zfill(crypto.decode_hex(checksum))
for checksum in long_string_to_list(
token_commitment.membership_hashes, 64)
],
value=csf_to_list(sender_balance.merkle_proof_values, int),
left=int(sender_balance.left),
right=int(sender_balance.right))
test_case.contract_interface.issue_swap_challenge(
token_pair=[swap.wallet.token.address, swap.recipient.token.address],
wallet=swap.wallet.address,
swap_order=swap_order,
sender_tx_recipient_trails=[
swap.wallet.trail_identifier,
int(transfer_index), swap.recipient.trail_identifier
],
allotment_chain=[
crypto.zfill(crypto.decode_hex(v)) for v in long_string_to_list(
sender_balance.merkle_proof_hashes, 64)
],
membership_chain=[
crypto.zfill(crypto.decode_hex(checksum))
for checksum in long_string_to_list(
token_commitment.membership_hashes, 64)
],
tx_chain=[crypto.zfill(x) for x in transfer_proof],
values=csf_to_list(sender_balance.merkle_proof_values, int),
l_r=[int(sender_balance.left),
int(sender_balance.right)],
tx_set_root=tx_set_root,
deltas=deltas,
passive_checksum=passive_checksum,
passive_amount=passive_amount,
passive_marker=passive_marker)
def test_partial_match_multi_eon_swap(self):
commit_eon(test_case=self, eon_number=1)
advance_to_next_eon(test_case=self, eon_number=1)
commit_eon(test_case=self, eon_number=2)
buy_lqd_nonce = random.randint(1, 999999)
sell_lqd_nonce = random.randint(1, 999999)
total_remaining_eons = 8
# make persistent swap
send_swap( # Buy LQD at 0.5 ETH
test_case=self,
eon_number=2,
account=self.testrpc_accounts[1],
token=self.eth_token,
token_swapped=self.lqd_token,
amount=4,
amount_swapped=8,
nonce=buy_lqd_nonce,
eon_count=total_remaining_eons)
swap = Transfer.objects.filter(
swap=True, wallet__token=self.eth_token).order_by('id')[0]
swap_tx_id = swap.tx_id
wallet_transfer_context = WalletTransferContext(wallet=swap.wallet,
transfer=None)
recipient_transfer_context = WalletTransferContext(
wallet=swap.recipient, transfer=None)
wallet_funds_before = 4
recipient_funds_before = 0
# process swaps
confirm_swaps_for_eon(operator_eon_number=2)
cancel_finalize_swaps_for_eon(operator_eon_number=2)
process_swaps_for_eon(operator_eon_number=2)
# make opposite swap
send_swap( # Sell LQD at 0.5 ETH
test_case=self,
eon_number=2,
account=self.testrpc_accounts[2],
token=self.lqd_token,
token_swapped=self.eth_token,
amount=2,
amount_swapped=1,
nonce=sell_lqd_nonce,
eon_count=1)
# process swaps
confirm_swaps_for_eon(operator_eon_number=2)
cancel_finalize_swaps_for_eon(operator_eon_number=2)
process_swaps_for_eon(operator_eon_number=2)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(2, False),
wallet_funds_before - 1)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(2, False),
recipient_funds_before + 2)
wallet_funds_before = wallet_funds_before - 1
recipient_funds_before = recipient_funds_before + 2
# skip some eons
for i in range(3, 5):
# proceed to next eon
advance_to_next_eon(test_case=self, eon_number=i - 1)
commit_eon(test_case=self, eon_number=i)
total_remaining_eons -= 1
swap = Transfer.objects.get(swap=True,
tx_id=swap_tx_id,
eon_number=i)
self.assertEqual(swap.eon_number, i)
# process swaps
confirm_swaps_for_eon(operator_eon_number=i)
cancel_finalize_swaps_for_eon(operator_eon_number=i)
process_swaps_for_eon(operator_eon_number=i)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(i, False),
wallet_funds_before)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(i, False),
recipient_funds_before)
new_wallet_funds = wallet_funds_before
new_recipient_funds = recipient_funds_before
# partial match across eons
for i in range(5, 8):
# proceed to next eon
advance_to_next_eon(test_case=self, eon_number=i - 1)
commit_eon(test_case=self, eon_number=i)
total_remaining_eons -= 1
swap = Transfer.objects.get(swap=True,
tx_id=swap_tx_id,
eon_number=i)
self.assertEqual(swap.eon_number, i)
# process swaps
confirm_swaps_for_eon(operator_eon_number=i)
cancel_finalize_swaps_for_eon(operator_eon_number=i)
process_swaps_for_eon(operator_eon_number=i)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(i, False),
new_wallet_funds)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(i, False),
new_recipient_funds)
# make opposite swap
send_swap( # Sell LQD at 0.5 ETH
test_case=self,
eon_number=i,
account=self.testrpc_accounts[i - 2],
token=self.lqd_token,
token_swapped=self.eth_token,
amount=2,
amount_swapped=1,
nonce=sell_lqd_nonce,
eon_count=1)
# process swaps
confirm_swaps_for_eon(operator_eon_number=i)
cancel_finalize_swaps_for_eon(operator_eon_number=i)
process_swaps_for_eon(operator_eon_number=i)
finalize_last_swap(test_case=self,
token=self.lqd_token,
token_swapped=self.eth_token,
account=self.testrpc_accounts[i - 2],
eon_count=1)
# process swaps
confirm_swaps_for_eon(operator_eon_number=i)
cancel_finalize_swaps_for_eon(operator_eon_number=i)
process_swaps_for_eon(operator_eon_number=i)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(i, False),
new_wallet_funds - 1)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(i, False),
new_recipient_funds + 2)
new_wallet_funds = new_wallet_funds - 1
new_recipient_funds = new_recipient_funds + 2
swap = Transfer.objects.get(swap=True, tx_id=swap_tx_id, eon_number=7)
matched_out, matched_in = swap.matched_amounts(all_eons=True)
# self.assertTrue(swap.processed)
self.assertTrue(swap.appended)
self.assertFalse(swap.voided)
self.assertFalse(swap.cancelled)
self.assertEqual(matched_out, 4)
self.assertEqual(matched_in, 8)
self.assertTrue(swap.complete)
self.assertEqual(
Transfer.objects.filter(tx_id=swap_tx_id,
eon_number__gt=7,
swap=True,
voided=False).count(), 0)
finalize_swap(test_case=self,
swap=swap,
account=self.testrpc_accounts[1],
eon_count=total_remaining_eons)
# process swaps
confirm_swaps_for_eon(operator_eon_number=7)
cancel_finalize_swaps_for_eon(operator_eon_number=7)
process_swaps_for_eon(operator_eon_number=7)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(7, False),
wallet_funds_before - 3)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(7, False),
recipient_funds_before + 6)
advance_to_next_eon(test_case=self, eon_number=7)
commit_eon(test_case=self, eon_number=8)
# process swaps
confirm_swaps_for_eon(operator_eon_number=8)
cancel_finalize_swaps_for_eon(operator_eon_number=8)
process_swaps_for_eon(operator_eon_number=8)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(8, False),
wallet_funds_before - 3)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(8, False),
recipient_funds_before + 6)
def finalize_swap(test_case: RPCTestCase,
swap: Transfer,
account,
expected_status=status.HTTP_200_OK,
eon_count=1):
print('FINALIZING {} ({}/{})'.format(swap.id, int(swap.amount),
int(swap.amount_swapped)))
finalization_authorizations = []
test_case.assertTrue(swap.complete)
recipient_view_context = WalletTransferContext(wallet=swap.recipient,
transfer=swap)
tx_set_tree = recipient_view_context.authorized_transfers_tree(
only_appended=False, force_append=True)
tx_set_hash = crypto.hex_value(tx_set_tree.root_hash())
transfer_index = tx_set_tree.merkle_tree_nonce_map.get(swap.nonce)
transfer_proof = tx_set_tree.proof(transfer_index)
highest_spendings, highest_gains = recipient_view_context.off_chain_actively_sent_received_amounts(
eon_number=swap.eon_number, only_appended=False)
print("Finalize spent {} gained {}".format(highest_spendings,
highest_gains))
for state in ActiveState.objects.filter(wallet=swap.recipient,
eon_number=swap.eon_number):
print(state.id)
print("Finalize spent {} gained {}".format(state.updated_spendings,
state.updated_gains))
finalization_active_state = ActiveState(
wallet=swap.recipient,
updated_spendings=highest_spendings + swap.amount_swapped,
updated_gains=highest_gains + swap.amount_swapped,
tx_set_hash=tx_set_hash,
tx_set_proof_hashes=transfer_proof,
tx_set_index=transfer_index,
eon_number=swap.eon_number)
finalization_authorizations.append({
'value':
encode_signature(
sign_message(finalization_active_state.checksum(),
account.get('pk')))
})
for i in range(1, eon_count):
future_spent_gained = max(highest_spendings,
highest_gains) + swap.amount_swapped + 1
empty_tx_set_hash = crypto.hex_value(NODE_CACHE[0]['hash'])
finalization_active_state = ActiveState(
wallet=swap.recipient,
updated_spendings=future_spent_gained,
updated_gains=future_spent_gained,
tx_set_hash=empty_tx_set_hash,
# any dummy value
tx_set_proof_hashes='',
# any dummy value
tx_set_index=0,
eon_number=swap.eon_number + i)
finalization_authorizations.append({
'value':
encode_signature(
sign_message(finalization_active_state.checksum(),
account.get('pk')))
})
# Make API Request
url = reverse('finalize-swap-endpoint', kwargs={'pk': swap.id})
data = {'finalization_signature': finalization_authorizations}
# Send tx to server
x = datetime.now()
response = test_case.client.put(url, data, format='json')
y = datetime.now()
delta = y - x
# Ensure the transaction was recorded
test_case.assertEqual(response.status_code, expected_status,
response.content)
print('FINALIZE Time: {}s'.format(delta))
# Log time delta
return delta
def cancel_swap(test_case: RPCTestCase,
swap: Transfer,
account,
expected_status=status.HTTP_200_OK,
eon_count=1):
sender_cancellation_authorizations = []
recipient_cancellation_authorizations = []
sender_view_context = WalletTransferContext(wallet=swap.wallet,
transfer=swap)
tx_set_tree = sender_view_context.authorized_transfers_tree(
only_appended=False,
force_append=False,
assume_active_state_exists=True)
tx_set_hash = crypto.hex_value(tx_set_tree.root_hash())
transfer_index = tx_set_tree.merkle_tree_nonce_map.get(swap.nonce)
transfer_proof = tx_set_tree.proof(transfer_index)
sender_highest_spendings, sender_highest_gains = sender_view_context.off_chain_actively_sent_received_amounts(
eon_number=swap.eon_number, only_appended=False)
matched_out, _ = swap.matched_amounts()
sender_highest_gains += swap.amount - matched_out
sender_cancellation_active_state = ActiveState(
wallet=swap.wallet,
updated_spendings=sender_highest_spendings,
updated_gains=sender_highest_gains,
tx_set_hash=tx_set_hash,
tx_set_proof_hashes=transfer_proof,
tx_set_index=transfer_index,
eon_number=swap.eon_number)
recipient_view_context = WalletTransferContext(wallet=swap.recipient,
transfer=swap)
tx_set_tree = recipient_view_context.authorized_transfers_tree(
only_appended=False,
force_append=False,
assume_active_state_exists=True)
tx_set_hash = crypto.hex_value(tx_set_tree.root_hash())
transfer_index = tx_set_tree.merkle_tree_nonce_map.get(swap.nonce)
transfer_proof = tx_set_tree.proof(transfer_index)
recipient_highest_spendings, recipient_highest_gains = recipient_view_context.off_chain_actively_sent_received_amounts(
eon_number=swap.eon_number, only_appended=False)
recipient_cancellation_active_state = ActiveState(
wallet=swap.recipient,
updated_spendings=recipient_highest_spendings + swap.amount_swapped,
updated_gains=recipient_highest_gains + swap.amount_swapped,
tx_set_hash=tx_set_hash,
tx_set_proof_hashes=transfer_proof,
tx_set_index=transfer_index,
eon_number=swap.eon_number)
sender_cancellation_authorizations.append({
'value':
encode_signature(
sign_message(sender_cancellation_active_state.checksum(),
account.get('pk')))
})
recipient_cancellation_authorizations.append({
'value':
encode_signature(
sign_message(recipient_cancellation_active_state.checksum(),
account.get('pk')))
})
for i in range(1, eon_count):
empty_tx_set_hash = crypto.hex_value(NODE_CACHE[0]['hash'])
sender_future_spent_gained = max(sender_highest_spendings,
sender_highest_gains) + 1
recipient_future_spent_gained = max(
recipient_highest_spendings,
recipient_highest_gains) + swap.amount_swapped + 1
sender_cancellation_active_state = ActiveState(
wallet=swap.wallet,
updated_spendings=sender_future_spent_gained,
updated_gains=sender_future_spent_gained,
tx_set_hash=empty_tx_set_hash,
# any dummy value
tx_set_proof_hashes='',
# any dummy value
tx_set_index=0,
eon_number=swap.eon_number + i)
recipient_cancellation_active_state = ActiveState(
wallet=swap.recipient,
updated_spendings=recipient_future_spent_gained,
updated_gains=recipient_future_spent_gained,
tx_set_hash=empty_tx_set_hash,
# any dummy value
tx_set_proof_hashes='',
# any dummy value
tx_set_index=0,
eon_number=swap.eon_number + i)
sender_cancellation_authorizations.append({
'value':
encode_signature(
sign_message(sender_cancellation_active_state.checksum(),
account.get('pk')))
})
recipient_cancellation_authorizations.append({
'value':
encode_signature(
sign_message(recipient_cancellation_active_state.checksum(),
account.get('pk')))
})
# Make API Request
url = reverse('cancel-swap-endpoint', kwargs={'pk': swap.id})
data = {
'sender_cancellation_signature': sender_cancellation_authorizations,
'recipient_cancellation_signature':
recipient_cancellation_authorizations
}
# Send tx to server
x = datetime.now()
response = test_case.client.put(url, data, format='json')
y = datetime.now()
delta = y - x
# Ensure the transaction was recorded
test_case.assertEqual(response.status_code, expected_status,
response.content)
print('CANCEL Time: {}s'.format(delta))
# Log time delta
return delta
def send_swap(test_case: RPCTestCase,
eon_number,
account,
token,
token_swapped,
amount,
amount_swapped,
nonce,
expected_status=status.HTTP_201_CREATED,
eon_count=1,
sell_order=True):
# Sender account
sender_wallet = Wallet.objects.get(address=remove_0x_prefix(
account.get('address')),
token=token)
# Recipient account
recipient_wallet = Wallet.objects.get(address=remove_0x_prefix(
account.get('address')),
token=token_swapped)
sender_wallet_context = WalletTransferContext(wallet=sender_wallet,
transfer=None)
recipient_wallet_context = WalletTransferContext(wallet=recipient_wallet,
transfer=None)
initial_sender_balance = sender_wallet_context.available_funds_at_eon(
eon_number=eon_number, only_appended=False)
initial_recipient_balance = recipient_wallet_context.available_funds_at_eon(
eon_number=eon_number, only_appended=False)
if initial_sender_balance < amount:
send_transaction(test_case=test_case,
eon_number=eon_number,
sender=testrpc_accounts.accounts[0],
recipient=account,
amount=amount - initial_sender_balance,
nonce=random.randint(1, 999999),
token=token)
if initial_sender_balance > amount:
# clear sender account
send_transaction(test_case=test_case,
eon_number=eon_number,
sender=account,
recipient=testrpc_accounts.accounts[0],
amount=initial_sender_balance - amount,
nonce=random.randint(1, 999999),
token=token)
if initial_recipient_balance > 0:
# clear recipient account
send_transaction(test_case=test_case,
eon_number=eon_number,
sender=account,
recipient=testrpc_accounts.accounts[0],
amount=initial_recipient_balance,
nonce=random.randint(1, 999999),
token=token_swapped)
sender_balance = sender_wallet_context.available_funds_at_eon(
eon_number=eon_number, only_appended=False)
recipient_balance = recipient_wallet_context.available_funds_at_eon(
eon_number=eon_number, only_appended=False)
test_case.assertEqual(sender_balance, amount)
test_case.assertEqual(recipient_balance, 0)
debit_balance_signatures = []
debit_signatures = []
credit_balance_signatures = []
credit_signatures = []
fulfillment_signatures = []
for i in range(eon_count):
swap = Transfer(wallet=sender_wallet,
amount=amount,
eon_number=eon_number + i,
recipient=recipient_wallet,
amount_swapped=amount_swapped,
nonce=nonce,
processed=False,
complete=False,
swap=True)
sender_wallet_context = WalletTransferContext(wallet=sender_wallet,
transfer=swap)
recipient_wallet_context = WalletTransferContext(
wallet=recipient_wallet, transfer=swap)
sender_highest_spent, sender_highest_gained = sender_wallet_context.off_chain_actively_sent_received_amounts(
eon_number=eon_number + i, only_appended=False)
if i == 0:
tx_set_tree = sender_wallet_context.authorized_transfers_tree(
only_appended=False, force_append=True)
else:
tx_set_tree = WalletTransferContext.authorized_transfers_tree_from_list(
[
swap.shorthand(sender_wallet_context,
is_last_transfer=True,
starting_balance=sender_balance)
])
tx_set_hash = hex_value(tx_set_tree.root_hash())
debiting_active_state = ActiveState(
wallet=sender_wallet,
updated_spendings=sender_highest_spent + amount,
updated_gains=sender_highest_gained,
eon_number=eon_number + i,
tx_set_hash=tx_set_hash)
debiting_active_state_authorization = sign_message(
debiting_active_state.checksum(), account.get('pk'))
debiting_active_state_signature = Signature(
wallet=sender_wallet,
checksum=hex_value(debiting_active_state.checksum()),
value=encode_signature(debiting_active_state_authorization))
test_case.assertTrue(debiting_active_state_signature.is_valid())
debit_concise_balance_marker = MinimumAvailableBalanceMarker(
wallet=sender_wallet, eon_number=eon_number + i, amount=0)
debit_concise_balance_marker_authorization = sign_message(
debit_concise_balance_marker.checksum(), account.get('pk'))
debit_concise_balance_marker_signature = Signature(
wallet=sender_wallet,
checksum=hex_value(debit_concise_balance_marker.checksum()),
value=encode_signature(debit_concise_balance_marker_authorization))
test_case.assertTrue(debit_concise_balance_marker_signature.is_valid())
recipient_highest_spent, recipient_highest_gained = recipient_wallet_context.off_chain_actively_sent_received_amounts(
eon_number=eon_number + i, only_appended=False)
if i == 0:
tx_set_tree = recipient_wallet_context.authorized_transfers_tree(
only_appended=False, force_append=True)
else:
tx_set_tree = WalletTransferContext.authorized_transfers_tree_from_list(
[
swap.shorthand(recipient_wallet_context,
is_last_transfer=True,
starting_balance=recipient_balance)
])
tx_set_hash = hex_value(tx_set_tree.root_hash())
crediting_active_state = ActiveState(
wallet=recipient_wallet,
updated_spendings=recipient_highest_spent,
updated_gains=recipient_highest_gained,
eon_number=eon_number + i,
tx_set_hash=tx_set_hash)
crediting_active_state_authorization = sign_message(
crediting_active_state.checksum(), account.get('pk'))
crediting_active_state_signature = Signature(
wallet=recipient_wallet,
checksum=hex_value(crediting_active_state.checksum()),
value=encode_signature(crediting_active_state_authorization))
test_case.assertTrue(crediting_active_state_signature.is_valid())
credit_concise_balance_marker = MinimumAvailableBalanceMarker(
wallet=recipient_wallet, eon_number=eon_number + i, amount=0)
credit_concise_balance_marker_authorization = sign_message(
credit_concise_balance_marker.checksum(), account.get('pk'))
credit_concise_balance_marker_signature = Signature(
wallet=recipient_wallet,
checksum=hex_value(credit_concise_balance_marker.checksum()),
value=encode_signature(
credit_concise_balance_marker_authorization))
test_case.assertTrue(
credit_concise_balance_marker_signature.is_valid())
swap.processed, swap.complete = True, True
if i == 0:
tx_set_tree = recipient_wallet_context.authorized_transfers_tree(
only_appended=False, force_append=True)
else:
tx_set_tree = WalletTransferContext.authorized_transfers_tree_from_list(
[
swap.shorthand(recipient_wallet_context,
is_last_transfer=True,
starting_balance=0)
])
tx_set_hash = hex_value(tx_set_tree.root_hash())
recipient_fulfillment_active_state = ActiveState(
wallet=recipient_wallet,
updated_spendings=recipient_highest_spent,
updated_gains=recipient_highest_gained + amount_swapped,
eon_number=eon_number + i,
tx_set_hash=tx_set_hash)
recipient_fulfillment_active_state_authorization = sign_message(
recipient_fulfillment_active_state.checksum(), account.get('pk'))
swap.processed, swap.complete = False, False
recipient_fulfillment_active_state_signature = Signature(
wallet=recipient_wallet,
checksum=hex_value(recipient_fulfillment_active_state.checksum()),
value=encode_signature(
recipient_fulfillment_active_state_authorization))
test_case.assertTrue(
recipient_fulfillment_active_state_signature.is_valid())
debit_balance_signatures.append({
'value':
encode_signature(debit_concise_balance_marker_authorization)
})
debit_signatures.append(
{'value': encode_signature(debiting_active_state_authorization)})
credit_balance_signatures.append({
'value':
encode_signature(credit_concise_balance_marker_authorization)
})
credit_signatures.append(
{'value': encode_signature(crediting_active_state_authorization)})
fulfillment_signatures.append({
'value':
encode_signature(recipient_fulfillment_active_state_authorization)
})
# Make API Request
url = reverse('swap-endpoint')
data = {
'debit_signature': debit_signatures,
'debit_balance_signature': debit_balance_signatures,
'credit_signature': credit_signatures,
'credit_balance_signature': credit_balance_signatures,
'credit_fulfillment_signature': fulfillment_signatures,
'eon_number': eon_number,
'amount': amount,
'amount_swapped': amount_swapped,
'nonce': nonce,
'wallet': {
'address': sender_wallet.address,
'token': sender_wallet.token.address,
},
'recipient': {
'address': recipient_wallet.address,
'token': recipient_wallet.token.address,
},
'sell_order': sell_order
}
# Send tx to server
x = datetime.now()
response = test_case.client.post(url, data, format='json')
y = datetime.now()
delta = y - x
# Ensure the transaction was recorded
test_case.assertEqual(response.status_code, expected_status,
response.content)
print('SWAP Time: {}s for {}/{}'.format(delta, amount, amount_swapped))
# assert that swap created for current eon is confirmed
tx = json.loads(response.content)
swap = Transfer.objects.get(id=tx['id'])
test_case.assertEqual(swap.eon_number, eon_number)
test_case.assertTrue(swap.is_signed_by_operator())
# Log time delta
return delta
def slash_bad_withdrawals():
contract_interface = NOCUSTContractInterface()
current_eon = contract_interface.get_current_eon_number()
# This lock is needed because some Withdrawal objects might be mutated, which can affect the checkpoint.
with RootCommitment.global_lock():
checkpoint_created = RootCommitment.objects.filter(
eon_number=current_eon).exists()
# fetch all wallets that issued a pending withdrawal
# pending withdrawals that were not slashed yet and issued during this eon or the previous one
withdrawal_wallets = WithdrawalRequest.objects \
.filter(slashed=False, eon_number__gte=current_eon-1) \
.values_list('wallet', flat=True).distinct()
for wallet_id in withdrawal_wallets:
# fetch wallet object
wallet = Wallet.objects.get(id=wallet_id)
with wallet.lock(auto_renewal=True), transaction.atomic():
pending_withdrawals = WithdrawalRequest.objects \
.filter(wallet=wallet, slashed=False, eon_number__gte=current_eon-1) \
.select_for_update()
# skip slashing if no slashable pending withdrawals are found
if pending_withdrawals.count() == 0:
logger.warning('Skipping withdrawal slash for {}. No Slashable Pending Withdrawals.'
.format(wallet.address))
continue
withdrawal_aggregate_query = pending_withdrawals.aggregate(
Sum('amount'), Min('eon_number'))
withdrawal_amount = withdrawal_aggregate_query['amount__sum']
min_eon = withdrawal_aggregate_query['eon_number__min']
withdrawals_in_current_eon = WithdrawalRequest.objects.filter(
wallet=wallet, eon_number=current_eon).count()
# create a tag for the tuple
# (current eon, number of pending withdrawals in this eon, wallet id, total withdrawal amount )
tag = 'withdrawal_request_{}_{}_{}_{}' \
.format(current_eon, withdrawals_in_current_eon, wallet.id, withdrawal_amount)
if EthereumTransaction.objects.filter(tag=tag).exists():
logger.warning(
'Skipping withdrawal slash for address {} and token {}. Slashing transaction already enqueued.'
.format(
wallet.address,
wallet.token.address))
continue
wallet_transfer_context = WalletTransferContext(
wallet=wallet, transfer=None)
available_balance = wallet_transfer_context.loosely_available_funds_at_eon(
eon_number=current_eon,
current_eon_number=current_eon,
is_checkpoint_created=checkpoint_created,
only_appended=True)
if available_balance >= 0:
logger.warning(
'Skipping withdrawal slash for address {} and token {}. Available balance covers amount.'
.format(
wallet.address,
wallet.token.address))
continue
# find minimum balance marker
# start before min possible eon
# until current eon
minimum_balance = MinimumAvailableBalanceMarker.objects \
.filter(
wallet=wallet,
eon_number__gte=min_eon-1,
eon_number__lte=current_eon) \
.order_by('amount') \
.first()
if minimum_balance is None or minimum_balance.amount >= withdrawal_amount:
logger.warning(
'Skipping withdrawal slash for address {} and token {}. Minimum balance within two epochs covers amount.'
.format(
wallet.address, wallet.token.address))
continue
logger.warning('{}: Slashing withdrawals of {} > {} >= {}.'
.format(
wallet.address,
withdrawal_amount,
available_balance,
minimum_balance.amount))
v, r, s = minimum_balance.signature.vrs()
# slash all withdrawals for this wallet-token pair
contract_interface.queue_slash_withdrawal(
token_address=wallet.token.address,
wallet_address=wallet.address,
eon_number=minimum_balance.eon_number,
available=int(minimum_balance.amount),
r=crypto.uint256(r),
s=crypto.uint256(s),
v=v,
tag=tag)
# mark all related withdrawals as slashed
pending_withdrawals.update(slashed=True)
def create(self, validated_data):
wallet = validated_data.pop('wallet')
recipient = validated_data.pop('recipient')
if not TokenPair.objects.filter(token_from=wallet.token,
token_to=recipient.token).exists():
raise serializers.ValidationError(
detail='', code=ErrorCode.TOKEN_PAIR_BLOCKED)
# swap data
valid_eons = validated_data.pop('valid_eons')
swap_amount = validated_data.pop('amount')
swap_nonce = validated_data.pop('nonce')
sell_order = validated_data.pop('sell_order', True)
swap_amount_swapped = validated_data.pop('amount_swapped')
debit_signatures = validated_data.pop('debit_signature')
debit_balance_signatures = validated_data.pop(
'debit_balance_signature')
credit_balance_signatures = validated_data.pop(
'credit_balance_signature')
credit_signatures = validated_data.pop('credit_signature')
recipient_fulfillment_signatures = validated_data.pop(
'credit_fulfillment_signature')
# common transaction id
tx_id = uuid.uuid4()
tx_time = timezone.now()
# cached items to be used later
sender_available_balance = 0
recipient_available_balance = 0
swap_set = []
debit_tx_set_index = []
credit_tx_set_index = []
# recipient_fulfillment_tx_set_index = []
debit_tx_set_cache = []
credit_tx_set_cache = []
# recipient_fulfillment_tx_set_cache = []
debit_balance_signature_records = []
credit_balance_signature_records = []
debit_signature_records = []
credit_signature_records = []
recipient_fulfillment_signature_records = []
debit_balance_records = []
credit_balance_records = []
debit_active_state_records = []
credit_active_state_records = []
recipient_fulfillment_active_state_records = []
initial_swap_confirmed = False
# get current eon
current_eon = LocalViewInterface.latest().eon_number()
# initial swap eon should be the current eon number
if validated_data.pop('eon_number') != current_eon:
raise serializers.ValidationError(
detail='', code=ErrorCode.EON_NUMBER_OUT_OF_SYNC)
wallets = sorted([wallet, recipient], key=lambda w: w.token.id)
with RootCommitment.read_write_lock(
suffix=current_eon, auto_renewal=False), wallets[0].lock(
auto_renewal=False), wallets[1].lock(auto_renewal=False):
if RootCommitment.objects.filter(eon_number=current_eon +
1).exists():
raise serializers.ValidationError(
detail='Checkpoint was already created for this eon.',
code=ErrorCode.EON_NUMBER_OUT_OF_SYNC)
for eon_number in range(current_eon, current_eon + valid_eons):
swap = Transfer(tx_id=tx_id,
wallet=wallet,
amount=swap_amount,
eon_number=eon_number,
recipient=recipient,
nonce=swap_nonce,
amount_swapped=swap_amount_swapped,
swap=True,
sell_order=sell_order,
time=tx_time)
wallet_view_context = WalletTransferContext(wallet=wallet,
transfer=swap)
recipient_view_context = WalletTransferContext(
wallet=recipient, transfer=swap)
if eon_number == current_eon:
# Ensure sender log consistency
can_append_to_sender_log = wallet_view_context.can_schedule_transfer(
)
if can_append_to_sender_log is not True:
raise serializers.ValidationError(
detail='Sender: {}'.format(
can_append_to_sender_log),
code=ErrorCode.DEBIT_WALLET_CANNOT_ADD_TRANSACTION)
# Ensure recipient log consistency
can_append_to_recipient_log = recipient_view_context.can_schedule_transfer(
)
if can_append_to_recipient_log is not True:
raise serializers.ValidationError(
detail='Recipient: {}'.format(
can_append_to_recipient_log),
code=ErrorCode.CREDIT_WALLET_CANNOT_ADD_TRANSACTION
)
# Ensure swap consistency
can_spend, sender_available_balance = wallet_view_context.can_send_transfer(
current_eon_number=current_eon,
using_only_appended_funds=False)
if can_spend is not True:
raise serializers.ValidationError(
detail=can_spend,
code=ErrorCode.DEBIT_WALLET_OVERSPENDING)
# Ensure that sender balance is exactly equal to total outgoing amount
if sender_available_balance != swap.amount:
raise serializers.ValidationError(
detail=
'Sender balance should be exactly equal to outgoing swap amount, {} != {}.'
.format(sender_available_balance, swap.amount),
code=ErrorCode.DEBIT_WALLET_BALANCE_AMOUNT_MISMATCH
)
# Ensure that recipient balance is zero
recipient_available_balance = recipient_view_context.available_funds_at_eon(
eon_number=eon_number, only_appended=False)
if recipient_available_balance != 0:
raise serializers.ValidationError(
detail='Recipient balance should be exactly zero.',
code=ErrorCode.CREDIT_WALLET_BALANCE_NOT_ZERO)
current_eon_swap = swap
sender_highest_spendings, sender_highest_gains = wallet_view_context.off_chain_actively_sent_received_amounts(
eon_number=swap.eon_number, only_appended=False)
recipient_highest_spendings, recipient_highest_gains = recipient_view_context.off_chain_actively_sent_received_amounts(
eon_number=swap.eon_number, only_appended=False)
else:
sender_highest_spendings, sender_highest_gains = 0, 0
recipient_highest_spendings, recipient_highest_gains = 0, 0
# Minimum Debit Balance Marker
debit_balance_marker_signature_data = debit_balance_signatures[
eon_number - current_eon]
debit_balance_marker = MinimumAvailableBalanceMarker(
wallet=wallet, eon_number=eon_number, amount=0)
debit_balance_marker_checksum = crypto.hex_value(
debit_balance_marker.checksum())
debit_balance_marker_signature = Signature(
wallet=wallet,
checksum=debit_balance_marker_checksum,
value=debit_balance_marker_signature_data.get('value'))
if not debit_balance_marker_signature.is_valid():
raise serializers.ValidationError(
detail='',
code=ErrorCode.INVALID_DEBIT_BALANCE_SIGNATURE)
# Minimum Credit Balance Marker
credit_balance_marker_signature_data = credit_balance_signatures[
eon_number - current_eon]
credit_balance_marker = MinimumAvailableBalanceMarker(
wallet=recipient, eon_number=eon_number, amount=0)
credit_balance_marker_checksum = crypto.hex_value(
credit_balance_marker.checksum())
credit_balance_marker_signature = Signature(
wallet=recipient,
checksum=credit_balance_marker_checksum,
value=credit_balance_marker_signature_data.get('value'))
if not credit_balance_marker_signature.is_valid():
raise serializers.ValidationError(
detail='',
code=ErrorCode.INVALID_CREDIT_BALANCE_SIGNATURE)
assert (sender_available_balance == swap.amount)
# Debit Authorization
debit_active_state_signature_data = debit_signatures[
eon_number - current_eon]
debit_active_state, \
debit_active_state_signature, \
debit_transfer_index, \
debit_transfer_cache = check_active_state_signature(
swap,
wallet,
debit_active_state_signature_data,
eon_number > current_eon,
sender_available_balance,
sender_highest_spendings,
sender_highest_gains,
signature_type=SignatureType.DEBIT)
# Credit Authorization
credit_active_state_signature_data = credit_signatures[
eon_number - current_eon]
credit_active_state, \
credit_active_state_signature, \
credit_transfer_index, \
credit_transfer_cache = check_active_state_signature(
swap,
recipient,
credit_active_state_signature_data,
eon_number > current_eon,
recipient_available_balance,
recipient_highest_spendings,
recipient_highest_gains,
signature_type=SignatureType.CREDIT)
# Finality Authorization
recipient_fulfillment_active_state_signature_data = recipient_fulfillment_signatures[
eon_number - current_eon]
recipient_fulfillment_active_state, \
recipient_fulfillment_active_state_signature, \
recipient_fulfillment_transfer_index, \
recipient_fulfillment_transfer_cache = check_active_state_signature(
swap,
recipient,
recipient_fulfillment_active_state_signature_data,
eon_number > current_eon,
recipient_available_balance,
recipient_highest_spendings,
recipient_highest_gains,
signature_type=SignatureType.FULFILLMENT)
# accumulate records to be saved
debit_balance_signature_records.append(
debit_balance_marker_signature)
credit_balance_signature_records.append(
credit_balance_marker_signature)
debit_signature_records.append(debit_active_state_signature)
credit_signature_records.append(credit_active_state_signature)
recipient_fulfillment_signature_records.append(
recipient_fulfillment_active_state_signature)
debit_balance_records.append(debit_balance_marker)
credit_balance_records.append(credit_balance_marker)
debit_active_state_records.append(debit_active_state)
credit_active_state_records.append(credit_active_state)
recipient_fulfillment_active_state_records.append(
recipient_fulfillment_active_state)
debit_tx_set_index.append(debit_transfer_index)
credit_tx_set_index.append(credit_transfer_index)
# recipient_fulfillment_tx_set_index.append(recipient_fulfillment_transfer_index)
debit_tx_set_cache.append(debit_transfer_cache)
credit_tx_set_cache.append(credit_transfer_cache)
# recipient_fulfillment_tx_set_cache.append(recipient_fulfillment_transfer_cache)
swap_set.append(swap)
assert (swap_set[0] is not None
and swap_set[0].eon_number == current_eon)
assert (len(swap_set) == valid_eons)
# locking context covers saving the state as well to make sure checkpoint creation is consistent
with transaction.atomic():
Signature.objects.bulk_create(
debit_balance_signature_records +
credit_balance_signature_records +
debit_signature_records + credit_signature_records +
recipient_fulfillment_signature_records)
for index in range(valid_eons):
debit_balance_records[
index].signature = debit_balance_signature_records[
index]
credit_balance_records[
index].signature = credit_balance_signature_records[
index]
debit_active_state_records[
index].wallet_signature = debit_signature_records[
index]
credit_active_state_records[
index].wallet_signature = credit_signature_records[
index]
recipient_fulfillment_active_state_records[
index].wallet_signature = recipient_fulfillment_signature_records[
index]
ActiveState.objects.bulk_create(
debit_active_state_records + credit_active_state_records +
recipient_fulfillment_active_state_records)
MinimumAvailableBalanceMarker.objects.bulk_create(
debit_balance_records + credit_balance_records)
for index in range(valid_eons):
swap_set[
index].sender_active_state = debit_active_state_records[
index]
swap_set[
index].recipient_active_state = credit_active_state_records[
index]
swap_set[
index].recipient_fulfillment_active_state = recipient_fulfillment_active_state_records[
index]
swap_set[
index].sender_balance_marker = debit_balance_records[
index]
swap_set[
index].sender_starting_balance = sender_available_balance
swap_set[
index].recipient_starting_balance = recipient_available_balance
# cache swap index in sender active set
swap_set[index].sender_merkle_index = debit_tx_set_index[
index]
# cache swap index in recipient active set
swap_set[
index].recipient_merkle_index = credit_tx_set_index[
index]
# cache active set merkle mountains height array and hash array for sender active set
swap_set[index].sender_merkle_hash_cache, swap_set[
index].sender_merkle_height_cache = debit_tx_set_cache[
index]
# cache active set merkle mountains height array and hash array for recipient active set
swap_set[index].recipient_merkle_hash_cache, swap_set[
index].recipient_merkle_height_cache = debit_tx_set_cache[
index]
Transfer.objects.bulk_create(swap_set)
swap_set[0].sign_swap(settings.HUB_OWNER_ACCOUNT_ADDRESS,
settings.HUB_OWNER_ACCOUNT_KEY)
initial_swap_confirmed = True
if initial_swap_confirmed:
operator_celery.send_task('auditor.tasks.on_swap_confirmation',
args=[swap_set[0].id])
return swap_set[0]
def respond_to_challenges():
contract_interface = NOCUSTContractInterface()
contract_interface.get_current_eon_number()
latest_root_commitment = RootCommitment.objects\
.all()\
.order_by('eon_number')\
.last()
if latest_root_commitment is None:
return
with Challenge.global_lock():
challenges = Challenge.objects\
.filter(rebuted=False, eon_number__lte=latest_root_commitment.eon_number)\
.order_by('block')
for challenge in challenges:
token = challenge.wallet.token
challenge_entry_token = token.address
if challenge.wallet.token != challenge.recipient.token:
try:
tp = TokenPair.objects.get(
token_from=challenge.wallet.token,
token_to=challenge.recipient.token)
except TokenPair.DoesNotExist:
logger.warning(
"Skipping challenge for {}. token pair not found!".
format(challenge.wallet.address))
continue
token = challenge.recipient.token
challenge_entry_token = to_checksum_address(tp.conduit)
challenge_entry = contract_interface.get_challenge_record(
token_address=challenge_entry_token,
recipient=challenge.recipient.address,
sender=challenge.wallet.address)
if not challenge_entry.challengeStage:
logger.warning(
"Skipping answered challenge for {}. Where is the answer tx_id?"
.format(challenge.wallet.address))
continue
try:
recipient_balance = ExclusiveBalanceAllotment.objects.get(
wallet=challenge.recipient,
eon_number=challenge.eon_number)
except ExclusiveBalanceAllotment.DoesNotExist:
logger.error("Could not find balance for {} at eon {}.".format(
challenge.wallet.address, challenge.eon_number))
send_admin_email(subject='DISPUTE! NO BALANCE!',
content='{}'.format(challenge.wallet.address))
return
token_commitment = TokenCommitment.objects.get(
token=token, root_commitment__eon_number=challenge.eon_number)
# state update challenge
if challenge.wallet.token == challenge.recipient.token and challenge.wallet.address == challenge.recipient.address:
v_0, r_0, s_0 = recipient_balance.wallet_v_r_s()
v_1, r_1, s_1 = recipient_balance.operator_v_r_s()
recipient_transfer_context = WalletTransferContext(
wallet=challenge.recipient, transfer=None)
passive_checksum, passive_amount, passive_marker = recipient_transfer_context.get_passive_values(
eon_number=challenge_entry.initialStateEon)
logger.info(
"Answering challenge for {} with balance {}.".format(
challenge.wallet.address, recipient_balance.amount()))
logger.info("{}{}{}, {}{}{}".format(v_0, r_0, s_0, v_1, r_1,
s_1))
send_admin_email(subject='DISPUTE! Sate Update.',
content='{}'.format(challenge.wallet.address))
# TODO signal critical failure if this does not succeed!
transaction = contract_interface.queue_answer_state_update_challenge(
challenge=challenge,
allotment_chain=[
crypto.zfill(crypto.decode_hex(checksum))
for checksum in long_string_to_list(
recipient_balance.merkle_proof_hashes, 64)
],
membership_chain=[
crypto.zfill(crypto.decode_hex(checksum))
for checksum in long_string_to_list(
token_commitment.membership_hashes, 64)
],
values=csf_to_list(recipient_balance.merkle_proof_values,
int),
l_r=[
int(recipient_balance.left),
int(recipient_balance.right)
],
tx_set_root=crypto.zfill(
crypto.decode_hex(
recipient_balance.transaction_set_root())),
deltas=[d for d in recipient_balance.deltas()],
r=[crypto.uint256(r_0),
crypto.uint256(r_1)],
s=[crypto.uint256(s_0),
crypto.uint256(s_1)],
v=[v_0, v_1],
passive_checksum=passive_checksum,
passive_amount=passive_amount,
passive_marker=passive_marker)
# transfer challenge
elif challenge.wallet.token == challenge.recipient.token and challenge.wallet.address != challenge.recipient.address:
try:
transfer = Transfer.objects.get(
recipient=challenge.recipient,
eon_number=challenge_entry.initialStateEon,
nonce=challenge_entry.deliveredTxNonce)
except Transfer.DoesNotExist:
logger.error(
"Could not find transfer for {} at eon {} with nonce {}."
.format(challenge.recipient.address,
challenge.eon_number,
challenge_entry.deliveredTxNonce))
send_admin_email(
subject='DISPUTE! NO TRANSFER!',
content=
"Could not find transfer for {} at eon {} with nonce {}."
.format(challenge.recipient.address,
challenge.eon_number,
challenge_entry.deliveredTxNonce))
return
recipient_transfer_context = WalletTransferContext(
wallet=challenge.recipient, transfer=None)
transfers_list_nonce_index_map = {}
transfers_list = recipient_transfer_context.authorized_transfers_list_shorthand(
only_appended=True,
force_append=False,
eon_number=challenge_entry.initialStateEon,
last_transfer_is_finalized=False,
index_map=transfers_list_nonce_index_map)
transfer_tree = TransactionMerkleTree(transfers_list)
transfer_index = transfers_list_nonce_index_map.get(
transfer.nonce)
transfer_node = transfer_tree.merkle_tree_leaf_map.get(
transfer_index)
transfer_proof = [
node.get('hash') for node in calculate_merkle_proof(
transfer_index, transfer_node)
]
passive_checksum, passive_amount, passive_marker = recipient_transfer_context.get_passive_values(
eon_number=challenge_entry.initialStateEon)
send_admin_email(subject='DISPUTE! Transfer Delivery.',
content='{} {} {}'.format(
challenge.wallet.address,
challenge.recipient.address,
transfer_index))
# TODO signal critical failure if this does not succeed!
transaction = contract_interface.queue_answer_delivery_challenge(
challenge=challenge,
tx_trail=transfer_index,
allotment_chain=[
crypto.zfill(crypto.decode_hex(v))
for v in long_string_to_list(
recipient_balance.merkle_proof_hashes, 64)
],
membership_chain=[
crypto.zfill(crypto.decode_hex(checksum))
for checksum in long_string_to_list(
token_commitment.membership_hashes, 64)
],
values=csf_to_list(recipient_balance.merkle_proof_values,
int),
l_r=[
int(recipient_balance.left),
int(recipient_balance.right)
],
deltas=[d for d in recipient_balance.deltas()],
tx_set_root=crypto.decode_hex(
recipient_balance.transaction_set_root()),
tx_chain=[crypto.zfill(x) for x in transfer_proof],
passive_checksum=passive_checksum,
passive_amount=passive_amount,
passive_marker=passive_marker)
# swap challenge
elif challenge.wallet.token != challenge.recipient.token and challenge.wallet.address == challenge.recipient.address:
try:
transfer = Transfer.objects.get(
recipient=challenge.recipient,
eon_number=challenge_entry.initialStateEon,
nonce=challenge_entry.deliveredTxNonce)
except Transfer.DoesNotExist:
logger.error(
"Could not find transfer for {} at eon {} with nonce {}."
.format(challenge.recipient.address,
challenge.eon_number,
challenge_entry.deliveredTxNonce))
send_admin_email(
subject='DISPUTE! NO SWAP!',
content=
"Could not find transfer for {} at eon {} with nonce {}."
.format(challenge.recipient.address,
challenge.eon_number,
challenge_entry.deliveredTxNonce))
return
recipient_transfer_context = WalletTransferContext(
wallet=challenge.recipient, transfer=None)
# if not initial transfer in a multi eon swap
# override starting balance to cached starting balance
if Transfer.objects.filter(eon_number=transfer.eon_number - 1,
tx_id=transfer.tx_id).exists():
starting_balance = int(transfer.recipient_starting_balance)
else:
starting_balance = int(
recipient_transfer_context.starting_balance_in_eon(
challenge_entry.initialStateEon))
transfers_list_nonce_index_map = {}
transfers_list = recipient_transfer_context.authorized_transfers_list_shorthand(
only_appended=True,
force_append=False,
eon_number=challenge_entry.initialStateEon,
last_transfer_is_finalized=True,
index_map=transfers_list_nonce_index_map,
starting_balance=starting_balance)
transfer_tree = TransactionMerkleTree(transfers_list)
transfer_index = transfers_list_nonce_index_map.get(
transfer.nonce)
transfer_node = transfer_tree.merkle_tree_leaf_map.get(
transfer_index)
transfer_proof = [
node.get('hash') for node in calculate_merkle_proof(
transfer_index, transfer_node)
]
passive_checksum, passive_amount, passive_marker = recipient_transfer_context.get_passive_values(
eon_number=challenge_entry.initialStateEon)
send_admin_email(subject='DISPUTE! Swap Delivery.',
content='{} {} {}'.format(
challenge.wallet.address,
challenge.recipient.address,
transfer_index))
is_cancelled = transfer.cancelled and transfer.recipient_cancellation_active_state is not None
if transfer.complete or is_cancelled:
starting_balance = 2**256 - 1
# TODO signal critical failure if this does not succeed!
transaction = contract_interface.queue_answer_swap_challenge(
challenge=challenge,
token_pair=[
challenge.wallet.token.address,
challenge.recipient.token.address
],
balance_at_start_of_eon=starting_balance,
tx_trail=int(transfer_index),
allotment_chain=[
crypto.zfill(crypto.decode_hex(v))
for v in long_string_to_list(
recipient_balance.merkle_proof_hashes, 64)
],
membership_chain=[
crypto.zfill(crypto.decode_hex(checksum))
for checksum in long_string_to_list(
token_commitment.membership_hashes, 64)
],
values=csf_to_list(recipient_balance.merkle_proof_values,
int),
l_r=[
int(recipient_balance.left),
int(recipient_balance.right)
],
deltas=[d for d in recipient_balance.deltas()],
tx_set_root=crypto.zfill(
crypto.decode_hex(
recipient_balance.transaction_set_root())),
tx_chain=[crypto.zfill(x) for x in transfer_proof],
passive_checksum=passive_checksum,
passive_amount=passive_amount,
passive_marker=passive_marker)
challenge.rebuted = True
challenge.save()
logger.warning(transaction)
def test_unmatched_swap(self):
commit_eon(test_case=self, eon_number=1)
advance_to_next_eon(test_case=self, eon_number=1)
commit_eon(test_case=self, eon_number=2)
# make a valid swap
send_swap(test_case=self,
eon_number=2,
account=self.testrpc_accounts[1],
token=self.eth_token,
token_swapped=self.lqd_token,
amount=1,
amount_swapped=2,
nonce=random.randint(1, 999999))
swap = Transfer.objects.filter(swap=True)[0]
wallet_transfer_context = WalletTransferContext(wallet=swap.wallet,
transfer=None)
funds_before = 1
# process swaps
confirm_swaps_for_eon(operator_eon_number=2)
cancel_finalize_swaps_for_eon(operator_eon_number=2)
process_swaps_for_eon(operator_eon_number=2)
# proceed to next eon
advance_to_next_eon(test_case=self, eon_number=2)
commit_eon(test_case=self, eon_number=3)
funds_after = wallet_transfer_context.balance_amount_as_of_eon(3)
self.assertEqual(funds_before, funds_after)
# make and cancel a swap
send_swap(test_case=self,
eon_number=3,
account=self.testrpc_accounts[1],
token=self.eth_token,
token_swapped=self.lqd_token,
amount=1,
amount_swapped=2,
nonce=random.randint(1, 999999))
freeze_last_swap(test_case=self,
token=self.eth_token,
token_swapped=self.lqd_token,
account=self.testrpc_accounts[1])
cancel_last_swap(test_case=self,
token=self.eth_token,
token_swapped=self.lqd_token,
account=self.testrpc_accounts[1])
funds_before = wallet_transfer_context.balance_amount_as_of_eon(3)
# process swaps
confirm_swaps_for_eon(operator_eon_number=3)
cancel_finalize_swaps_for_eon(operator_eon_number=3)
process_swaps_for_eon(operator_eon_number=3)
# proceed to next eon
advance_to_next_eon(test_case=self, eon_number=3)
commit_eon(test_case=self, eon_number=4)
funds_after = wallet_transfer_context.balance_amount_as_of_eon(4)
self.assertEqual(funds_before, funds_after)
def process_passive_transfer(transfer, operator_eon_number,
checkpoint_created):
if transfer.wallet == transfer.recipient:
logger.info('Voiding self transfer.')
transfer.close(voided=True)
return
with transfer.lock(auto_renewal=True), transfer.wallet.lock(
auto_renewal=True), transfer.recipient.lock(auto_renewal=True):
wallet_view_context = WalletTransferContext(wallet=transfer.wallet,
transfer=transfer)
recipient_view_context = WalletTransferContext(
wallet=transfer.recipient, transfer=transfer)
if should_void_transfer(transfer, wallet_view_context,
recipient_view_context, operator_eon_number,
checkpoint_created):
logger.info('Voiding transfer.')
transfer.close(voided=True)
return
tx_set_tree = wallet_view_context.optimized_authorized_transfers_tree(
only_appended=True)
tx_set_hash = hex_value(tx_set_tree.root_hash())
highest_spendings, highest_gains = wallet_view_context.off_chain_actively_sent_received_amounts(
eon_number=transfer.eon_number, only_appended=True)
active_state = ActiveState(
wallet=transfer.wallet,
updated_spendings=transfer.sender_active_state.updated_spendings,
updated_gains=highest_gains,
tx_set_hash=tx_set_hash,
eon_number=transfer.eon_number)
raw_checksum = active_state.checksum()
encoded_checksum = hex_value(raw_checksum)
wallet_active_state = transfer.sender_active_state
if wallet_active_state.wallet_signature.checksum != encoded_checksum:
logger.error(
'Transfer {} invalid sender active state checksum for {}'.
format(transfer.id, transfer.wallet.address))
transfer.close(voided=True)
return
try:
wallet_active_state.operator_signature = wallet_active_state.sign_active_state(
settings.HUB_OWNER_ACCOUNT_ADDRESS,
settings.HUB_OWNER_ACCOUNT_KEY)
except LookupError as e:
logger.error(e)
return
transfer.sender_active_state.save()
transfer.close(complete=True, appended=True)
operator_celery.send_task('auditor.tasks.on_transfer_confirmation',
args=[transfer.id])
logger.info('Passive transfer {} processed.'.format(transfer.id))
def test_checkpoint_creation(self):
self.eth_token = Token.objects.first()
lqd_token_address = deploy_new_test_token(test_case=self)
distribute_token_balance_to_addresses(
test_case=self,
token_address=lqd_token_address,
recipients=testrpc_accounts.accounts)
self.lqd_token = register_token(token_address=lqd_token_address,
name='Liquidity',
short_name='LQD',
register_on_chain=True)
send_queued_transactions()
self.tokens = [self.eth_token, self.lqd_token]
TokenPair.objects.create(token_from=self.eth_token,
token_to=self.lqd_token)
TokenPair.objects.create(token_from=self.lqd_token,
token_to=self.eth_token)
self.registered_accounts = {
self.eth_token: register_testrpc_accounts(self,
token=self.eth_token),
self.lqd_token: register_testrpc_accounts(self,
token=self.lqd_token)
}
for token in self.tokens:
self.assertEqual(
self.contract_interface.get_unmanaged_funds(token.address, 1),
0)
self.assertEqual(
self.contract_interface.get_managed_funds(token.address, 1), 0)
for token in self.tokens:
create_deposits(self, testrpc_accounts.accounts, token)
for token in self.tokens:
self.assertEqual(
self.contract_interface.get_unmanaged_funds(token.address, 1),
self.contract_interface.get_total_balance(token.address))
self.assertEqual(
self.contract_interface.get_managed_funds(token.address, 1), 0)
for account in testrpc_accounts.accounts[1:5]:
eth_wallet = Wallet.objects.get(address=remove_0x_prefix(
account.get('address')),
token=self.eth_token)
lqd_wallet = Wallet.objects.get(address=remove_0x_prefix(
account.get('address')),
token=self.lqd_token)
eth_wallet_context = WalletTransferContext(wallet=eth_wallet,
transfer=None)
lqd_wallet_context = WalletTransferContext(wallet=lqd_wallet,
transfer=None)
account[
'reduced_eth_balance'] = eth_wallet_context.available_funds_at_eon(
eon_number=1, only_appended=False) - 1
account[
'reduced_lqd_balance'] = lqd_wallet_context.available_funds_at_eon(
eon_number=1, only_appended=False)
send_swap( # Buy LQD at 0.5 ETH
test_case=self,
eon_number=1,
account=account,
token=self.eth_token,
token_swapped=self.lqd_token,
amount=1,
amount_swapped=2,
nonce=random.randint(1, 999999))
for account in testrpc_accounts.accounts[5:9]:
eth_wallet = Wallet.objects.get(address=remove_0x_prefix(
account.get('address')),
token=self.eth_token)
lqd_wallet = Wallet.objects.get(address=remove_0x_prefix(
account.get('address')),
token=self.lqd_token)
eth_wallet_context = WalletTransferContext(wallet=eth_wallet,
transfer=None)
lqd_wallet_context = WalletTransferContext(wallet=lqd_wallet,
transfer=None)
account[
'reduced_eth_balance'] = eth_wallet_context.available_funds_at_eon(
eon_number=1, only_appended=False)
account[
'reduced_lqd_balance'] = lqd_wallet_context.available_funds_at_eon(
eon_number=1, only_appended=False) - 2
send_swap( # Sell LQD at 0.5 ETH
test_case=self,
eon_number=1,
account=account,
token=self.lqd_token,
token_swapped=self.eth_token,
amount=2,
amount_swapped=1,
nonce=random.randint(1, 999999))
confirm_swaps_for_eon(operator_eon_number=1)
cancel_finalize_swaps_for_eon(operator_eon_number=1)
process_swaps_for_eon(operator_eon_number=1)
for account in testrpc_accounts.accounts[1:5]:
finalize_last_swap(test_case=self,
token=self.eth_token,
token_swapped=self.lqd_token,
account=account)
for account in testrpc_accounts.accounts[5:9]:
finalize_last_swap(test_case=self,
token=self.lqd_token,
token_swapped=self.eth_token,
account=account)
confirm_swaps_for_eon(operator_eon_number=1)
cancel_finalize_swaps_for_eon(operator_eon_number=1)
process_swaps_for_eon(operator_eon_number=1)
buyers_sellers = [
testrpc_accounts.accounts[1:5], testrpc_accounts.accounts[5:9]
]
for i in range(0, 2):
for account in buyers_sellers[i]:
eth_wallet = Wallet.objects.get(address=remove_0x_prefix(
account.get('address')),
token=self.eth_token)
lqd_wallet = Wallet.objects.get(address=remove_0x_prefix(
account.get('address')),
token=self.lqd_token)
eth_wallet_context = WalletTransferContext(wallet=eth_wallet,
transfer=None)
lqd_wallet_context = WalletTransferContext(wallet=lqd_wallet,
transfer=None)
eth_out, eth_in = eth_wallet_context.off_chain_actively_sent_received_amounts(
eon_number=1, only_appended=False)
lqd_out, lqd_in = lqd_wallet_context.off_chain_actively_sent_received_amounts(
eon_number=1, only_appended=False)
eth_out -= account['reduced_eth_balance']
lqd_out -= account['reduced_lqd_balance']
if i == 0: # LQD buyers
assert eth_out == 1 and eth_in == 0, '{}/{}'.format(
eth_out, eth_in)
assert lqd_out - 2 == 0 and lqd_in - 2 == 2, '{}/{}'.format(
lqd_out, lqd_in)
else: # LQD sellers
assert lqd_out == 2 and lqd_in == 0, '{}/{}'.format(
lqd_out, lqd_in)
assert eth_out - 1 == 0 and eth_in - 1 == 1, '{}/{}'.format(
eth_out, eth_in)
# Verify transfers were complete
swaps = Transfer.objects.filter(swap=True)
for transfer in swaps:
self.assertTrue(transfer.is_fulfilled_swap())
commit_eon(test_case=self, eon_number=1)
advance_to_next_eon(test_case=self, eon_number=1)
commit_eon(test_case=self, eon_number=2)
def place_parallel_withdrawals(test_case: RPCTestCase,
token,
wallet_address,
current_eon,
dishonest=False):
token_commitment = TokenCommitment.objects.get(
token=token, root_commitment__eon_number=current_eon - 1)
wallet = Wallet.objects.get(token=token,
address=remove_0x_prefix(wallet_address))
wallet_transfer_context = WalletTransferContext(wallet=wallet,
transfer=None)
allotment = wallet_transfer_context.balance_as_of_eon(
eon_number=current_eon - 1)
passive_checksum, passive_amount, passive_marker = wallet_transfer_context.get_passive_values(
eon_number=current_eon - 1)
available_balance = wallet_transfer_context.loosely_available_funds_at_eon(
eon_number=current_eon,
current_eon_number=current_eon,
is_checkpoint_created=True,
only_appended=True)
overdraw = dishonest and available_balance < allotment.amount()
if overdraw:
total_draw = max(available_balance, allotment.amount()) // 4
else:
total_draw = min(available_balance, allotment.amount()) // 4
total_amount = 0
if (total_draw == 0):
return (total_amount, [], False)
withdrawal_amounts = [total_draw // 4, total_draw // 2, total_draw // 4]
for withdrawal_amount in withdrawal_amounts:
cyan([
wallet.address, wallet.token.address, withdrawal_amount,
available_balance
])
test_case.contract_interface.withdraw(
token_address=wallet.token.address,
wallet=wallet.address,
active_state_checksum=crypto.zfill(
allotment.active_state_checksum()),
trail=int(allotment.merkle_proof_trail),
allotment_chain=[
crypto.zfill(crypto.decode_hex(checksum))
for checksum in long_string_to_list(
allotment.merkle_proof_hashes, 64)
],
membership_chain=[
crypto.zfill(crypto.decode_hex(checksum))
for checksum in long_string_to_list(
token_commitment.membership_hashes, 64)
],
values=csf_to_list(allotment.merkle_proof_values, int),
exclusive_allotment_interval=[
int(allotment.left), int(allotment.right)
],
withdrawal_amount=int(withdrawal_amount),
passive_checksum=passive_checksum,
passive_amount=passive_amount,
passive_marker=passive_marker)
total_amount += int(withdrawal_amount)
return (total_amount, withdrawal_amounts, overdraw)
def process_swaps_for_eon(operator_eon_number):
checkpoint_created = RootCommitment.objects.filter(
eon_number=operator_eon_number).exists()
notification_queue = []
with transaction.atomic():
default_time = timezone.now() - datetime.timedelta(days=365000)
# Match swaps
last_unprocessed_swap_time = timezone.make_aware(
datetime.datetime.fromtimestamp(
cache.get_or_set('last_unprocessed_swap_time',
default_time.timestamp())))
unprocessed_swaps = Transfer.objects \
.filter(
time__gte=last_unprocessed_swap_time,
processed=False,
complete=False,
voided=False,
cancelled=False,
swap=True,
eon_number=operator_eon_number,
sender_active_state__operator_signature__isnull=False,
recipient_active_state__operator_signature__isnull=False) \
.select_for_update() \
.order_by('time')
order_books_cache = {}
for swap in unprocessed_swaps:
last_unprocessed_swap_time = max(
last_unprocessed_swap_time,
swap.time + datetime.timedelta(milliseconds=1))
matched_successfully = False
with transaction.atomic(), swap.lock(
auto_renewal=True), swap.wallet.lock(
auto_renewal=True), swap.recipient.lock(
auto_renewal=True):
swap_wallet_view_context = WalletTransferContext(
wallet=swap.wallet, transfer=swap)
swap_recipient_view_context = WalletTransferContext(
wallet=swap.recipient, transfer=swap)
if swap_expired(swap, operator_eon_number, checkpoint_created):
logger.info('Retiring swap')
swap.retire_swap()
continue
if should_void_swap(swap, swap_wallet_view_context,
swap_recipient_view_context,
operator_eon_number, checkpoint_created):
logger.info('Voiding swap.')
swap.close(voided=True)
continue
elif swap.is_fulfilled_swap():
logger.info('Skipping finalized swap.')
continue
opposite_order_book_name = '{}-{}'.format(
swap.recipient.token.short_name,
swap.wallet.token.short_name)
# If this is a sell order then the opposite orderbook is for buys, which should be sorted
# in decremental order by price such that the first element in the list is the highest priced
opposite_comparison_function = price_comparison_function(
inverse=swap.sell_order, reverse=swap.sell_order)
if opposite_order_book_name not in order_books_cache:
print("FETCHED")
opposite_swaps = Transfer.objects\
.filter(
id__lte=swap.id,
wallet__token=swap.recipient.token,
recipient__token=swap.wallet.token,
processed=False,
complete=False,
voided=False,
cancelled=False,
swap=True,
eon_number=operator_eon_number,
sender_active_state__operator_signature__isnull=False,
recipient_active_state__operator_signature__isnull=False)\
.select_for_update()
order_books_cache[opposite_order_book_name] = SortedList(
opposite_swaps,
key=cmp_to_key(opposite_comparison_function))
else:
print("CACHED")
opposite_order_book = SortedList(
order_books_cache[opposite_order_book_name],
key=cmp_to_key(opposite_comparison_function))
opposite_orders_consumed = 0
if len(opposite_order_book) == 0:
print("EMPTY")
opposite_swaps = Transfer.objects \
.filter(
id__lte=swap.id,
wallet__token=swap.recipient.token,
recipient__token=swap.wallet.token,
processed=False,
complete=False,
voided=False,
cancelled=False,
swap=True,
eon_number=operator_eon_number,
sender_active_state__operator_signature__isnull=False,
recipient_active_state__operator_signature__isnull=False) \
.select_for_update()
assert (len(opposite_order_book) == opposite_swaps.count())
for opposite in opposite_order_book:
# BUY Price: amount / amount_swapped
# SELL Price: amount_swapped / amount
if swap.sell_order:
logger.info('SELL FOR {} VS BUY AT {}'.format(
swap.amount_swapped / swap.amount,
opposite.amount / opposite.amount_swapped))
else:
logger.info('BUY AT {} VS SELL FOR {}'.format(
swap.amount / swap.amount_swapped,
opposite.amount_swapped / opposite.amount))
# The invariant is that the buy order price is greater than or equal to the sell order price
invariant = swap.amount * \
opposite.amount >= opposite.amount_swapped * swap.amount_swapped
if not invariant:
break
with opposite.lock(
auto_renewal=True), opposite.wallet.lock(
auto_renewal=True), opposite.recipient.lock(
auto_renewal=True):
opposite_wallet_view_context = WalletTransferContext(
wallet=opposite.wallet, transfer=opposite)
opposite_recipient_view_context = WalletTransferContext(
wallet=opposite.recipient, transfer=opposite)
if swap_expired(opposite, operator_eon_number,
checkpoint_created):
opposite.retire_swap()
opposite_orders_consumed += 1
continue
if should_void_swap(opposite,
opposite_wallet_view_context,
opposite_recipient_view_context,
operator_eon_number,
checkpoint_created):
opposite.close(voided=True)
opposite_orders_consumed += 1
continue
elif opposite.is_fulfilled_swap():
opposite_orders_consumed += 1
continue
matched_successfully = match_limit_to_limit(
swap, opposite)
if opposite.is_fulfilled_swap():
opposite_orders_consumed += 1
try:
opposite.sign_swap_fulfillment(
settings.HUB_OWNER_ACCOUNT_ADDRESS,
settings.HUB_OWNER_ACCOUNT_KEY)
except LookupError as e:
logger.error(e)
if swap.is_fulfilled_swap():
try:
swap.sign_swap_fulfillment(
settings.HUB_OWNER_ACCOUNT_ADDRESS,
settings.HUB_OWNER_ACCOUNT_KEY)
except LookupError as e:
logger.error(e)
if swap.is_fulfilled_swap():
break
order_books_cache[
opposite_order_book_name] = opposite_order_book.islice(
opposite_orders_consumed)
swap_order_book_name = '{}-{}'.format(
swap.wallet.token.short_name,
swap.recipient.token.short_name)
if not swap.is_fulfilled_swap(
) and swap_order_book_name in order_books_cache:
swap_comparison_function = price_comparison_function(
inverse=not swap.sell_order,
reverse=not swap.sell_order)
swap_order_book = SortedList(
order_books_cache[swap_order_book_name],
key=cmp_to_key(swap_comparison_function))
swap_order_book.add(swap)
order_books_cache[swap_order_book_name] = swap_order_book
if matched_successfully:
notification_queue.append((swap.id, opposite.id))
cache.set('last_unprocessed_swap_time',
last_unprocessed_swap_time.timestamp())
for swap_id, opposite_id in notification_queue:
operator_celery.send_task('auditor.tasks.on_swap_matching',
args=[swap_id, opposite_id])
def test_match_multi_eon_swap(self):
commit_eon(test_case=self, eon_number=1)
advance_to_next_eon(test_case=self, eon_number=1)
commit_eon(test_case=self, eon_number=2)
buy_lqd_nonce = random.randint(1, 999999)
sell_lqd_nonce = random.randint(1, 999999)
total_remaining_eons = 5
# make persistent swap
send_swap( # Buy LQD at 0.5 ETH
test_case=self,
eon_number=2,
account=self.testrpc_accounts[1],
token=self.eth_token,
token_swapped=self.lqd_token,
amount=1,
amount_swapped=2,
nonce=buy_lqd_nonce,
eon_count=total_remaining_eons)
self.assertEqual(
Transfer.objects.filter(swap=True).count(), total_remaining_eons)
swap = Transfer.objects.filter(swap=True)[0]
swap_tx_id = swap.tx_id
wallet_transfer_context = WalletTransferContext(wallet=swap.wallet,
transfer=None)
recipient_transfer_context = WalletTransferContext(
wallet=swap.recipient, transfer=None)
wallet_funds_before = 1
recipient_funds_before = 0
# process swaps
confirm_swaps_for_eon(operator_eon_number=2)
cancel_finalize_swaps_for_eon(operator_eon_number=2)
process_swaps_for_eon(operator_eon_number=2)
# skip some eons
for i in range(3, 6):
# proceed to next eon
advance_to_next_eon(test_case=self, eon_number=i - 1)
commit_eon(test_case=self, eon_number=i)
total_remaining_eons -= 1
# process swaps
confirm_swaps_for_eon(operator_eon_number=i)
cancel_finalize_swaps_for_eon(operator_eon_number=i)
process_swaps_for_eon(operator_eon_number=i)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(i, False),
wallet_funds_before)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(i, False),
recipient_funds_before)
# make opposite swap
send_swap( # Sell LQD at 0.5 ETH
test_case=self,
eon_number=5,
account=self.testrpc_accounts[2],
token=self.lqd_token,
token_swapped=self.eth_token,
amount=2,
amount_swapped=1,
nonce=sell_lqd_nonce,
eon_count=1)
# process swaps
confirm_swaps_for_eon(operator_eon_number=5)
cancel_finalize_swaps_for_eon(operator_eon_number=5)
process_swaps_for_eon(operator_eon_number=5)
swap1 = Transfer.objects.filter(eon_number=5).order_by('time')[0]
swap2 = Transfer.objects.filter(eon_number=5).order_by('time')[1]
self.assertNotEqual(swap1.tx_id, swap2.tx_id)
# finalize swaps
swap = Transfer.objects.get(swap=True, tx_id=swap_tx_id, eon_number=5)
self.assertEqual(
Transfer.objects.filter(tx_id=swap_tx_id,
eon_number__gt=5,
swap=True,
voided=False).count(), 0)
finalize_swap(test_case=self,
swap=swap,
account=self.testrpc_accounts[1],
eon_count=total_remaining_eons)
finalize_last_swap(test_case=self,
token=self.lqd_token,
token_swapped=self.eth_token,
account=self.testrpc_accounts[2],
eon_count=1)
# process swaps
confirm_swaps_for_eon(operator_eon_number=5)
cancel_finalize_swaps_for_eon(operator_eon_number=5)
process_swaps_for_eon(operator_eon_number=5)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(5, False),
wallet_funds_before - 1)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(5, False),
recipient_funds_before + 2)
def test_cancel_multi_eon_swap(self):
commit_eon(test_case=self, eon_number=1)
advance_to_next_eon(test_case=self, eon_number=1)
commit_eon(test_case=self, eon_number=2)
buy_lqd_nonce = random.randint(1, 999999)
sell_lqd_nonce = random.randint(1, 999999)
total_remaining_eons = 5
# make persistent swap
buy_lqd = send_swap( # Buy LQD at 0.5 ETH
test_case=self,
eon_number=2,
account=self.testrpc_accounts[1],
token=self.eth_token,
token_swapped=self.lqd_token,
amount=1,
amount_swapped=2,
nonce=buy_lqd_nonce,
eon_count=total_remaining_eons)
swap = Transfer.objects.filter(
swap=True, wallet__token=self.eth_token).order_by('id')[0]
swap_tx_id = swap.tx_id
wallet_transfer_context = WalletTransferContext(wallet=swap.wallet,
transfer=None)
recipient_transfer_context = WalletTransferContext(
wallet=swap.recipient, transfer=None)
wallet_funds_before = 1
recipient_funds_before = 0
# process swaps
confirm_swaps_for_eon(operator_eon_number=2)
cancel_finalize_swaps_for_eon(operator_eon_number=2)
process_swaps_for_eon(operator_eon_number=2)
# skip some eons
for i in range(3, 5):
# proceed to next eon
advance_to_next_eon(test_case=self, eon_number=i - 1)
commit_eon(test_case=self, eon_number=i)
total_remaining_eons -= 1
# process swaps
confirm_swaps_for_eon(operator_eon_number=i)
cancel_finalize_swaps_for_eon(operator_eon_number=i)
process_swaps_for_eon(operator_eon_number=i)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(i, False),
wallet_funds_before)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(i, False),
recipient_funds_before)
self.assertEqual(
wallet_transfer_context.balance_as_of_eon(i).amount(),
wallet_funds_before)
swap = Transfer.objects.get(swap=True, tx_id=swap_tx_id, eon_number=4)
freeze_swap(test_case=self,
swap=swap,
account=self.testrpc_accounts[1])
swap = Transfer.objects.get(swap=True, tx_id=swap_tx_id, eon_number=4)
cancel_swap(test_case=self,
swap=swap,
account=self.testrpc_accounts[1],
eon_count=total_remaining_eons)
self.assertEqual(
Transfer.objects.filter(tx_id=swap_tx_id,
eon_number__gt=4,
swap=True,
voided=False).count(), 0)
swap = Transfer.objects.filter(swap=True)[0]
self.assertTrue(swap.cancelled)
self.assertTrue(swap.processed)
self.assertTrue(swap.appended)
self.assertTrue(swap.sender_cancellation_active_state.
operator_signature is not None)
# proceed to next eon
advance_to_next_eon(test_case=self, eon_number=4)
commit_eon(test_case=self, eon_number=5)
total_remaining_eons -= 1
# process swaps
confirm_swaps_for_eon(operator_eon_number=5)
cancel_finalize_swaps_for_eon(operator_eon_number=5)
process_swaps_for_eon(operator_eon_number=5)
swap = Transfer.objects.filter(swap=True)[0]
self.assertTrue(swap.cancelled)
self.assertTrue(swap.processed)
self.assertTrue(swap.appended)
self.assertEqual(swap.eon_number, 4)
self.assertEqual(
wallet_transfer_context.balance_as_of_eon(5).amount(),
wallet_funds_before)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(5, False),
wallet_funds_before)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(5, False),
recipient_funds_before)
# make opposite swap
sell_lqd = send_swap( # Sell LQD at 0.5 ETH
test_case=self,
eon_number=5,
account=self.testrpc_accounts[2],
token=self.lqd_token,
token_swapped=self.eth_token,
amount=2,
amount_swapped=1,
nonce=sell_lqd_nonce,
eon_count=1)
# process swaps
confirm_swaps_for_eon(operator_eon_number=5)
cancel_finalize_swaps_for_eon(operator_eon_number=5)
process_swaps_for_eon(operator_eon_number=5)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(5, False),
wallet_funds_before)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(5, False),
recipient_funds_before)
commit_eon(test_case=self, eon_number=5)
def test_cancel_after_partial_match_multi_eon_swap(self):
commit_eon(test_case=self, eon_number=1)
advance_to_next_eon(test_case=self, eon_number=1)
commit_eon(test_case=self, eon_number=2)
buy_lqd_nonce = random.randint(1, 999999)
sell_lqd_nonce = random.randint(1, 999999)
total_remaining_eons = 5
# make persistent swap
send_swap( # Buy LQD at 0.5 ETH
test_case=self,
eon_number=2,
account=self.testrpc_accounts[1],
token=self.eth_token,
token_swapped=self.lqd_token,
amount=2,
amount_swapped=4,
nonce=buy_lqd_nonce,
eon_count=total_remaining_eons)
swap = Transfer.objects.filter(
swap=True, wallet__token=self.eth_token).order_by('id')[0]
swap_tx_id = swap.tx_id
wallet_transfer_context = WalletTransferContext(wallet=swap.wallet,
transfer=None)
recipient_transfer_context = WalletTransferContext(
wallet=swap.recipient, transfer=None)
wallet_funds_before = 2
recipient_funds_before = 0
# process swaps
confirm_swaps_for_eon(operator_eon_number=2)
cancel_finalize_swaps_for_eon(operator_eon_number=2)
process_swaps_for_eon(operator_eon_number=2)
# skip some eons
for i in range(3, 5):
# proceed to next eon
advance_to_next_eon(test_case=self, eon_number=i - 1)
commit_eon(test_case=self, eon_number=i)
total_remaining_eons -= 1
try:
swap = Transfer.objects.get(swap=True,
tx_id=swap_tx_id,
eon_number=i)
self.assertTrue(True)
except Transfer.DoesNotExist:
self.assertTrue(False)
# process swaps
confirm_swaps_for_eon(operator_eon_number=i)
cancel_finalize_swaps_for_eon(operator_eon_number=i)
process_swaps_for_eon(operator_eon_number=i)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(i, False),
wallet_funds_before)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(i, False),
recipient_funds_before)
# make opposite swap
send_swap( # Sell LQD at 0.5 ETH
test_case=self,
eon_number=4,
account=self.testrpc_accounts[2],
token=self.lqd_token,
token_swapped=self.eth_token,
amount=2,
amount_swapped=1,
nonce=sell_lqd_nonce,
eon_count=1)
# process swaps
confirm_swaps_for_eon(operator_eon_number=4)
cancel_finalize_swaps_for_eon(operator_eon_number=4)
process_swaps_for_eon(operator_eon_number=4)
finalize_last_swap(test_case=self,
token=self.lqd_token,
token_swapped=self.eth_token,
account=self.testrpc_accounts[2],
eon_count=1)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(4, False),
wallet_funds_before - 1)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(4, False),
recipient_funds_before + 2)
# proceed to next eon
advance_to_next_eon(test_case=self, eon_number=4)
commit_eon(test_case=self, eon_number=5)
total_remaining_eons -= 1
swap = Transfer.objects.get(swap=True, tx_id=swap_tx_id, eon_number=5)
self.assertFalse(swap.processed)
self.assertTrue(swap.appended)
self.assertFalse(swap.voided)
self.assertFalse(swap.cancelled)
self.assertFalse(swap.complete)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(5, False),
wallet_funds_before - 1)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(5, False),
recipient_funds_before + 2)
# process swaps
confirm_swaps_for_eon(operator_eon_number=5)
cancel_finalize_swaps_for_eon(operator_eon_number=5)
process_swaps_for_eon(operator_eon_number=5)
swap = Transfer.objects.get(swap=True, tx_id=swap_tx_id, eon_number=5)
freeze_swap(test_case=self,
swap=swap,
account=self.testrpc_accounts[1])
swap = Transfer.objects.get(swap=True, tx_id=swap_tx_id, eon_number=5)
cancel_swap(test_case=self,
swap=swap,
account=self.testrpc_accounts[1],
eon_count=total_remaining_eons)
self.assertEqual(
Transfer.objects.filter(tx_id=swap_tx_id,
eon_number__gt=5,
swap=True,
voided=False).count(), 0)
# process swaps
confirm_swaps_for_eon(operator_eon_number=5)
cancel_finalize_swaps_for_eon(operator_eon_number=5)
process_swaps_for_eon(operator_eon_number=5)
swap = Transfer.objects.get(swap=True, tx_id=swap_tx_id, eon_number=5)
self.assertTrue(swap.processed)
self.assertTrue(swap.appended)
self.assertFalse(swap.voided)
self.assertTrue(swap.cancelled)
self.assertFalse(swap.complete)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(5, False),
wallet_funds_before - 1)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(5, False),
recipient_funds_before + 2)
# proceed to next eon
advance_to_next_eon(test_case=self, eon_number=5)
commit_eon(test_case=self, eon_number=6)
total_remaining_eons -= 1
# process swaps
confirm_swaps_for_eon(operator_eon_number=6)
cancel_finalize_swaps_for_eon(operator_eon_number=6)
process_swaps_for_eon(operator_eon_number=6)
swap = Transfer.objects.get(swap=True, tx_id=swap_tx_id, eon_number=6)
self.assertTrue(swap.processed)
self.assertFalse(swap.appended)
self.assertTrue(swap.voided)
self.assertTrue(swap.cancelled)
self.assertFalse(swap.complete)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(6, False),
wallet_funds_before - 1)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(6, False),
recipient_funds_before + 2)
# make opposite swap
send_swap( # Sell LQD at 0.5 ETH
test_case=self,
eon_number=6,
account=self.testrpc_accounts[3],
token=self.lqd_token,
token_swapped=self.eth_token,
amount=2,
amount_swapped=1,
nonce=sell_lqd_nonce,
eon_count=1)
# process swaps
confirm_swaps_for_eon(operator_eon_number=6)
cancel_finalize_swaps_for_eon(operator_eon_number=6)
process_swaps_for_eon(operator_eon_number=6)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(6, False),
wallet_funds_before - 1)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(6, False),
recipient_funds_before + 2)
commit_eon(test_case=self, eon_number=6)
def test_cancel_after_partial_match_swap(self):
commit_eon(test_case=self, eon_number=1)
advance_to_next_eon(test_case=self, eon_number=1)
commit_eon(test_case=self, eon_number=2)
buy_lqd_nonce = random.randint(1, 999999)
sell_lqd_nonce = random.randint(1, 999999)
total_remaining_eons = 5
# make persistent swap
send_swap( # Buy LQD at 0.5 ETH
test_case=self,
eon_number=2,
account=self.testrpc_accounts[1],
token=self.eth_token,
token_swapped=self.lqd_token,
amount=2,
amount_swapped=4,
nonce=buy_lqd_nonce,
eon_count=total_remaining_eons)
swap = Transfer.objects.filter(
swap=True, wallet__token=self.eth_token).order_by('id')[0]
swap_tx_id = swap.tx_id
wallet_transfer_context = WalletTransferContext(wallet=swap.wallet,
transfer=None)
recipient_transfer_context = WalletTransferContext(
wallet=swap.recipient, transfer=None)
wallet_funds_before = 2
recipient_funds_before = 0
# process swaps
confirm_swaps_for_eon(operator_eon_number=2)
cancel_finalize_swaps_for_eon(operator_eon_number=2)
process_swaps_for_eon(operator_eon_number=2)
# make opposite swap
send_swap( # Sell LQD at 0.5 ETH
test_case=self,
eon_number=2,
account=self.testrpc_accounts[2],
token=self.lqd_token,
token_swapped=self.eth_token,
amount=2,
amount_swapped=1,
nonce=sell_lqd_nonce,
eon_count=1)
# process swaps
confirm_swaps_for_eon(operator_eon_number=2)
cancel_finalize_swaps_for_eon(operator_eon_number=2)
process_swaps_for_eon(operator_eon_number=2)
finalize_last_swap(test_case=self,
token=self.lqd_token,
token_swapped=self.eth_token,
account=self.testrpc_accounts[2],
eon_count=1)
# process swaps
confirm_swaps_for_eon(operator_eon_number=2)
cancel_finalize_swaps_for_eon(operator_eon_number=2)
process_swaps_for_eon(operator_eon_number=2)
swap = Transfer.objects.get(swap=True, tx_id=swap_tx_id, eon_number=2)
freeze_swap(test_case=self,
swap=swap,
account=self.testrpc_accounts[1])
swap = Transfer.objects.get(swap=True, tx_id=swap_tx_id, eon_number=2)
cancel_swap(test_case=self,
swap=swap,
account=self.testrpc_accounts[1],
eon_count=total_remaining_eons)
self.assertEqual(
Transfer.objects.filter(tx_id=swap_tx_id,
eon_number__gt=2,
swap=True,
voided=False).count(), 0)
# process swaps
confirm_swaps_for_eon(operator_eon_number=2)
cancel_finalize_swaps_for_eon(operator_eon_number=2)
process_swaps_for_eon(operator_eon_number=2)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(2, False),
wallet_funds_before - 1)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(2, False),
recipient_funds_before + 2)
advance_to_next_eon(test_case=self, eon_number=2)
commit_eon(test_case=self, eon_number=3)
# process swaps
confirm_swaps_for_eon(operator_eon_number=3)
cancel_finalize_swaps_for_eon(operator_eon_number=3)
process_swaps_for_eon(operator_eon_number=3)
self.assertEqual(
wallet_transfer_context.available_funds_at_eon(3, False),
wallet_funds_before - 1)
self.assertEqual(
recipient_transfer_context.available_funds_at_eon(3, False),
recipient_funds_before + 2)
def create_token_commitment_for_eon(token: Token, eon_number):
logger.info('Creating Token Commitment for {} at {}'.format(
token.address, eon_number))
last_eon_number = eon_number - 1
with transaction.atomic():
wallets = Wallet.objects\
.filter(
token=token,
registration_operator_authorization__isnull=False,
trail_identifier__isnull=False)\
.order_by('trail_identifier')
new_balances = []
left, right = 0, 0
for wallet in wallets:
with wallet.lock(auto_renewal=True):
wallet_transfer_context = WalletTransferContext(
wallet=wallet, transfer=None)
last_transfer, last_transfer_is_outgoing = wallet_transfer_context.last_appended_active_transfer(
eon_number=last_eon_number)
last_transfer_active_state = None
if last_transfer is not None and last_transfer.is_open_swap():
last_transfer.retire_swap()
if last_transfer is not None:
last_transfer_active_state = WalletTransferContext.appropriate_transfer_active_state(
transfer=last_transfer,
is_outgoing=last_transfer_is_outgoing)
available_funds = wallet_transfer_context.available_funds_at_eon(
eon_number=last_eon_number,
only_appended=True)
right = left + available_funds
assert right >= left, 'Wallet {} Token {} Balance {}'.format(
wallet.address, token.address, available_funds)
passive_checksum, passive_amount, passive_marker = wallet_transfer_context.get_passive_values(
eon_number=last_eon_number)
new_balances.append({
'contract': settings.HUB_LQD_CONTRACT_ADDRESS,
'token': token.address,
'wallet': wallet.address,
'left': left,
'right': right,
'active_state_checksum': last_transfer_active_state.checksum() if last_transfer_active_state is not None else b'\0'*32,
'active_state': last_transfer_active_state,
'passive_checksum': passive_checksum,
'passive_amount': passive_amount,
'passive_marker': passive_marker,
})
left = right
last_incoming_passive_transfer = wallet_transfer_context.last_appended_incoming_passive_transfer(
eon_number=last_eon_number)
if last_incoming_passive_transfer:
wallet_transfer_context = WalletTransferContext(
wallet=wallet, transfer=last_incoming_passive_transfer)
passive_eon_transfers_list = wallet_transfer_context.incoming_passive_transfers_list(
only_appended=True,
force_append=False)
passive_transfers_merkle_tree = wallet_transfer_context.incoming_passive_transfers_tree(
only_appended=True,
force_append=False)
for index, incoming_passive_transfer in enumerate(passive_eon_transfers_list):
final_transfer_index = index
final_transfer_membership_proof = passive_transfers_merkle_tree.proof(
final_transfer_index)
final_transfer_membership_proof_chain = final_transfer_membership_proof.get(
"chain")
final_transfer_membership_proof_values = final_transfer_membership_proof.get(
"values")
assert incoming_passive_transfer.final_receipt_hashes is None
assert incoming_passive_transfer.final_receipt_index is None
assert incoming_passive_transfer.final_receipt_values is None
incoming_passive_transfer.final_receipt_hashes = final_transfer_membership_proof_chain
incoming_passive_transfer.final_receipt_index = final_transfer_index
incoming_passive_transfer.final_receipt_values = final_transfer_membership_proof_values
incoming_passive_transfer.save()
if last_transfer_active_state is None:
continue
wallet_transfer_context = WalletTransferContext(
wallet=wallet, transfer=last_transfer)
starting_balance = int(
wallet_transfer_context.starting_balance_in_eon(last_eon_number))
# if last active transfer is a multi eon swap
# starting balance included in every tx checksum should be set to the cached starting balance
# this way checkpoint state will match signed active state
if last_transfer.is_swap() and not last_transfer.cancelled:
if Transfer.objects.filter(eon_number=last_transfer.eon_number-1, tx_id=last_transfer.tx_id).exists():
matched_out, matched_in = last_transfer.matched_amounts(
all_eons=True)
current_matched_out, current_matched_in = last_transfer.matched_amounts(
all_eons=False)
if last_transfer_is_outgoing:
sender_starting_balance = last_transfer.sender_starting_balance
# current eon's starting balance should be equal to
# cached starting balance - committed matched out amount in past rounds
assert(starting_balance == sender_starting_balance -
matched_out + current_matched_out)
starting_balance = sender_starting_balance
else:
recipient_starting_balance = last_transfer.recipient_starting_balance
# current eon's starting balance should be equal to
# cached starting balance + committed matched in amount in past rounds
assert(
starting_balance == recipient_starting_balance + matched_in - current_matched_in)
starting_balance = recipient_starting_balance
confirmed_eon_transfers_list = wallet_transfer_context.authorized_transfers_list(
only_appended=True,
force_append=False)
confirmed_eon_transfers_list_shorthand = wallet_transfer_context.authorized_transfers_list_shorthand(
only_appended=True,
force_append=False,
last_transfer_is_finalized=False,
starting_balance=starting_balance)
transaction_merkle_tree = TransactionMerkleTree(
confirmed_eon_transfers_list_shorthand)
transaction_merkle_tree_root = hex_value(
transaction_merkle_tree.root_hash())
assert transaction_merkle_tree_root == last_transfer_active_state.tx_set_hash,\
'{}/{}'.format(transaction_merkle_tree_root,
last_transfer_active_state.tx_set_hash)
for confirmed_incoming_transfer in confirmed_eon_transfers_list:
if confirmed_incoming_transfer.recipient != wallet:
continue
final_transfer_index = transaction_merkle_tree.merkle_tree_nonce_map.get(
confirmed_incoming_transfer.nonce)
final_transfer_membership_proof_chain = transaction_merkle_tree.proof(
final_transfer_index)
assert confirmed_incoming_transfer.final_receipt_hashes is None
assert confirmed_incoming_transfer.final_receipt_index is None
confirmed_incoming_transfer.final_receipt_hashes = final_transfer_membership_proof_chain
confirmed_incoming_transfer.final_receipt_index = final_transfer_index
confirmed_incoming_transfer.save()
managed_funds = 0
if eon_number > 1:
last_eon = LocalViewInterface.confirmed(eon_number=last_eon_number)
pending_withdrawals_until_last_eon = \
WithdrawalRequest.objects\
.filter(wallet__token=token, eon_number__lte=last_eon_number, slashed=False)\
.filter(Q(withdrawal__isnull=True) | Q(withdrawal__block__gt=last_eon.block))
if not pending_withdrawals_until_last_eon.exists():
last_eon_pending_withdrawals = 0
else:
last_eon_pending_withdrawals = pending_withdrawals_until_last_eon\
.aggregate(Sum('amount')) \
.get('amount__sum')
total_token_balance = last_eon.contractledgerstate_set.get(
token=token).total_balance
managed_funds = total_token_balance - last_eon_pending_withdrawals
if right < managed_funds:
logger.warning('UNCLAIMED FUNDS: {} in {}'.format(
managed_funds - right, token.address))
send_admin_email(
subject='Soft TokenCommitment Warning: Extra funds',
content='There are some additional funds in the balance pool that belong to no one: {} of {}'
.format(managed_funds - right, token.address))
altered_balances = new_balances + [{
'contract': settings.HUB_LQD_CONTRACT_ADDRESS,
'token': token.address,
'wallet': settings.HUB_OWNER_ACCOUNT_ADDRESS,
'left': left,
'right': managed_funds,
'active_state_checksum': b'\0'*32,
'active_state': None,
'passive_checksum': b'\0'*32,
'passive_amount': 0,
'passive_marker': 0,
}]
new_merkle_tree = MerkleTree(altered_balances, managed_funds)
right = managed_funds
else:
if right > managed_funds:
logger.error('OVERCLAIMING FUNDS!! {} > {} in {}'.format(
right, managed_funds, token.address))
send_admin_email(
subject='HARD Checkpoint Error: OVERCLAIMING!',
content='OVERCLAIMING FUNDS!! {} > {} in {}'.format(right, managed_funds, token.address))
new_merkle_tree = MerkleTree(new_balances, right)
bulk_manager = BulkCreateManager(chunk_size=500)
for index, balance in enumerate(new_balances):
if not balance.get('wallet') or balance.get('wallet') == '0x0000000000000000000000000000000000000000':
continue
merkle_proof = new_merkle_tree.proof(index)
wallet = Wallet.objects.get(
token=token,
address=remove_0x_prefix(balance.get('wallet')))
# TODO verify validity through RPC prior to insertion
assert(wallet.trail_identifier == index)
# create records in batches
bulk_manager.add(
ExclusiveBalanceAllotment(
wallet=wallet,
eon_number=eon_number,
left=balance.get('left'),
right=balance.get('right'),
merkle_proof_hashes=merkle_proof.get('chain'),
merkle_proof_values=merkle_proof.get('values'),
merkle_proof_trail=index,
active_state=balance.get('active_state')
)
)
# make sure remaining batch is added
bulk_manager.done()
token_commitment = TokenCommitment.objects.create(
token=token,
merkle_root=hex_value(new_merkle_tree.root_hash()),
upper_bound=right)
return token_commitment
def make_random_valid_transactions(test_case: RPCTestCase,
eon_number,
accounts,
token: Token,
make_deposits=True):
print('Making random valid transactions.')
transfer_starting_count = Transfer.objects.count()
active_state_starting_count = ActiveState.objects.count()
balance_marker_starting_count = MinimumAvailableBalanceMarker.objects.count(
)
signature_starting_count = Signature.objects.count()
if make_deposits:
create_deposits(test_case, accounts, token)
transactions = 50
tx_amount = 0
time_to_send = datetime.timedelta(0)
ids = [
Wallet.objects.get(address=remove_0x_prefix(account.get('address')),
token=token).pk for account in accounts
]
passive_transfers = 0
for i in range(transactions):
# Randomly choose two wallets
a, b = 0, 0
while a == b:
a = random.randint(2, len(ids))
b = random.randint(2, len(ids))
# Sender account
sender = Wallet.objects.get(pk=ids[a - 1])
available = WalletTransferContext(wallet=sender, transfer=None)\
.available_funds_at_eon(eon_number=eon_number, only_appended=False)
amount = min(available, int(random.random() * available))
tx_amount += amount
# Recipient account
nonce = random.randint(1, 999999)
# Send tx to server and log time delta
time_to_send += send_transaction(test_case=test_case,
eon_number=eon_number,
sender=accounts[a - 1],
recipient=accounts[b - 1],
amount=amount,
nonce=nonce,
token=token)
# Assert expected database state
executed_transfer_count = i + 1
test_case.assertEqual(
Transfer.objects.count(),
transfer_starting_count + executed_transfer_count)
test_case.assertEqual(
MinimumAvailableBalanceMarker.objects.count(),
balance_marker_starting_count + executed_transfer_count)
added_active_states_in_previous_iterations = passive_transfers
added_active_states_in_current_iteration = 1
test_case.assertEqual(
ActiveState.objects.count(), active_state_starting_count +
added_active_states_in_previous_iterations +
added_active_states_in_current_iteration)
added_operator_signatures = passive_transfers
synchronously_confirmed_passive = 1
test_case.assertEqual(
Signature.objects.count(),
signature_starting_count
# sender / recipient active state sigs
+ added_active_states_in_previous_iterations +
added_active_states_in_current_iteration +
executed_transfer_count # balance marker sigs
+ added_operator_signatures +
synchronously_confirmed_passive) # operator sigs on active states
test_case.assertEqual(
Signature.objects.count(),
signature_starting_count
# sender / recipient active state sigs
+ added_active_states_in_previous_iterations +
added_active_states_in_current_iteration +
executed_transfer_count # balance marker sigs
+ added_operator_signatures # operator sigs on active states
+ added_active_states_in_current_iteration)
passive_transfers += 1
average_time_to_send = time_to_send / transactions
print("Total wei transferred: ", tx_amount)
print("Average time to send: ", average_time_to_send)
