def test_wallet_funds(self):
hub_mba = MinimumAvailableBalanceMarker(wallet=self.hub_wallet,
amount=1,
eon_number=3)
mba_checksum = hub_mba.checksum()
sign = Signature(wallet=self.hub_wallet,
checksum=crypto.hex_value(mba_checksum),
value=crypto.encode_signature(
crypto.sign_message(
mba_checksum, self.hub_private.to_string())))
sign.save()
hub_mba.signature = sign
hub_mba.save()
hub_state = ActiveState(wallet=self.hub_wallet,
eon_number=3,
updated_spendings=4,
updated_gains=76,
tx_set_hash=uuid.uuid4().hex,
tx_set_index=2)
state_checksum = hub_state.checksum()
sign = Signature(
wallet=self.hub_wallet,
checksum=crypto.hex_value(state_checksum),
value=crypto.encode_signature(
crypto.sign_message(state_checksum,
self.hub_private.to_string())))
sign.save()
hub_state.wallet_signature = sign
hub_state.save()
transfer = Transfer(
wallet=self.hub_wallet,
sender_balance_marker=hub_mba,
amount=100000,
eon_number=NOCUSTContractInterface().get_current_eon_number(),
recipient=self.wallet,
nonce=random.randint(1, 1000),
sender_active_state=hub_state,
passive=True)
transfer.save()
response = self.client.post(self.url, data=self.payload).json()
self.assertEqual(response, "Ok")
def register_owner_account(token: Token):
if Wallet.objects.filter(token=token, address__iexact=remove_0x_prefix(settings.HUB_OWNER_ACCOUNT_ADDRESS)).exists():
logger.error('Owner account already registered.')
return
if not LocalViewInterface.get_contract_parameters():
logger.error('Contract parameters not yet populated.')
return
logger.warning('Registering owner account: {}'.format(
settings.HUB_OWNER_ACCOUNT_ADDRESS))
latest_eon_number = LocalViewInterface.latest().eon_number()
authorization_digest = Wallet(
token=token, address=settings.HUB_OWNER_ACCOUNT_ADDRESS).get_admission_hash(latest_eon_number)
authorization = sign_message(
authorization_digest, settings.HUB_OWNER_ACCOUNT_KEY)
latest_tos_config = TOSConfig.objects.all().order_by('time').last()
tos_signature = sign_message(
hex_value(latest_tos_config.digest()), settings.HUB_OWNER_ACCOUNT_KEY)
registration = AdmissionRequestSerializer(data={
'token': token.address,
'address': remove_0x_prefix(settings.HUB_OWNER_ACCOUNT_ADDRESS),
'authorization': {
'value': encode_signature(authorization)
},
'tos_signature': {
'value': encode_signature(tos_signature)
}
})
registration.is_valid(raise_exception=True)
registration.save()
process_admissions()
def create_root_commitment_for_eon(token_commitments: [TokenCommitment], eon_number, latest_block_number):
token_commitment_leaves = [commitment.shorthand()
for commitment in token_commitments]
token_merkle_tree = TokenMerkleTree(token_commitment_leaves)
token_merkle_tree_root = hex_value(token_merkle_tree.root_hash())
previous_eon_basis = ZERO_CHECKSUM
if eon_number > 1:
local_block = LocalViewInterface.confirmed(eon_number - 1)
print(local_block.__dict__)
print(local_block.eon_number())
previous_eon_basis = local_block.basis
root_commitment = RootCommitment.objects.create(
eon_number=eon_number,
basis=previous_eon_basis,
merkle_root=token_merkle_tree_root,
block=latest_block_number)
for token_commitment in token_commitments:
token_commitment.root_commitment = root_commitment
token_commitment.membership_hashes = token_merkle_tree.proof(
token_commitment.token.trail)
token_commitment.save()
return root_commitment
def save(self, *args, **kwargs):
if not self.pk:
result = crypto.hash_array([
crypto.address(self.token_from.address),
crypto.address(self.token_to.address)
])
self.conduit = crypto.hex_address(crypto.hex_value(result))
super(TokenPair, self).save(*args, **kwargs)
def update_registration(self, signature, message):
# this is from Postgresql functions inside DB.
# Hell know why this exists in first place
registration = Signature.objects.create(
wallet=self.wallet,
checksum=crypto.hex_value(message),
value=signature)
self.wallet.registration_authorization = registration
self.wallet.save()
self.hub_wallet.registration_authorization = registration
self.hub_wallet.save()
def clean(self):
if not self.wallet_signature.is_valid():
raise ValidationError("Incorrect sender signature.")
elif self.wallet_signature.checksum != crypto.hex_value(
self.checksum()):
raise ValidationError("Invalid sender active state checksum.")
if self.operator_signature is not None:
if not self.operator_signature.is_valid():
raise ValidationError("Incorrect sender signature.")
elif self.operator_signature.checksum != self.wallet_signature.checksum:
raise ValidationError(
"Invalid operator active state checksum.")
def sign_admission(self, eon_number, operator_wallet, private_key):
admission_hash = self.get_admission_hash(eon_number)
admission_hash_encoded = hex_value(admission_hash)
vrs = sign_message(m=admission_hash, k=private_key)
Signature = apps.get_model('ledger', 'Signature')
operator_signature = Signature.objects.create(
wallet=operator_wallet,
checksum=admission_hash_encoded,
value=encode_signature(vrs))
return operator_signature
def validate(self, attrs):
authorization = attrs.pop('authorization').get('value')
address = attrs.get('address')
token = attrs.get('token')
tos_signature = attrs.pop('tos_signature').get('value')
if BlacklistEntry.objects.filter(
address__iexact=remove_0x_prefix(address)).exists():
raise serializers.ValidationError(
detail='', code=ErrorCode.WALLET_BLACKLISTED)
if Wallet.objects.filter(address__iexact=remove_0x_prefix(address),
token=token).exists():
raise serializers.ValidationError(
detail='', code=ErrorCode.WALLET_ALREADY_ADMITTED)
dummy_wallet = Wallet(token=token, address=remove_0x_prefix(address))
attrs['registration_eon_number'] = LocalViewInterface.latest(
).eon_number()
admission_hash = hex_value(
dummy_wallet.get_admission_hash(attrs['registration_eon_number']))
attrs['signature'] = Signature(wallet=dummy_wallet,
checksum=admission_hash,
value=authorization)
if not attrs['signature'].is_valid():
raise serializers.ValidationError(
detail='', code=ErrorCode.INVALID_ADMISSION_SIGNATURE)
latest_tos_config = TOSConfig.objects.all().order_by('time').last()
attrs['tos_signature'] = Signature(wallet=dummy_wallet,
checksum=latest_tos_config.digest(),
value=tos_signature)
if not attrs['tos_signature'].is_valid():
raise serializers.ValidationError(
detail='Invalid TOS (digest: {}) signature'.format(
latest_tos_config.digest()),
code=ErrorCode.INVALID_TOS_SIGNATURE)
attrs['tos_config'] = latest_tos_config
return attrs
def sign_active_state(self, address, private_key):
raw_checksum = self.checksum()
vrs = sign_message(m=raw_checksum, k=private_key)
Wallet = apps.get_model('ledger', 'Wallet')
try:
operator_wallet = Wallet.objects.get(
token=self.wallet.token, address=remove_0x_prefix(address))
except Wallet.DoesNotExist:
raise LookupError(
'Signing wallet {} is not yet registered'.format(address))
Signature = apps.get_model('ledger', 'Signature')
operator_signature = Signature.objects.create(
wallet=operator_wallet,
checksum=hex_value(raw_checksum),
value=encode_signature(vrs))
return operator_signature
def update(self, swap, validated_data):
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 current_swap.complete:
raise serializers.ValidationError(
detail='', code=ErrorCode.SWAP_ALREADY_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)
freezing_signature_data = validated_data.pop('freezing_signature')
freezing_checksum = crypto.hex_value(
current_swap.swap_cancellation_message_checksum())
freezing_signature = Signature(
wallet=current_swap.wallet,
checksum=freezing_checksum,
value=freezing_signature_data.get('value'))
if not freezing_signature.is_valid():
raise serializers.ValidationError(
detail='', code=ErrorCode.INVALID_FREEZING_SIGNATURE)
freezing_signature.save()
# only current swap should be locked, future swaps are not matched
with current_swap.lock(
auto_renewal=False), current_swap.wallet.lock(
auto_renewal=False), current_swap.recipient.lock(
auto_renewal=False):
swap_set.update(cancelled=True,
swap_freezing_signature=freezing_signature)
return current_swap
def validate(self, attrs):
address = attrs.get('address')
tos_signature = attrs.pop('tos_signature')
latest_tos_config = TOSConfig.objects.all().order_by('time').last()
if TOSSignature.objects.filter(
address__iexact=remove_0x_prefix(address),
tos_config=latest_tos_config).exists():
raise serializers.ValidationError(
detail='', code=ErrorCode.LATEST_TOS_ALREADY_SIGNED)
wallet = Wallet.objects.filter(
address__iexact=remove_0x_prefix(address)).last()
if wallet is None:
raise serializers.ValidationError(
detail='', code=ErrorCode.WALLET_NOT_ADMITTED)
attrs['tos_signature'] = Signature(wallet=wallet,
checksum=hex_value(
latest_tos_config.digest()),
value=tos_signature)
if not attrs['tos_signature'].is_valid():
raise serializers.ValidationError(
detail=
'Invalid TOS (digest: {}) privacy polict (digest: {}) signature'
.format(latest_tos_config.terms_of_service_digest,
latest_tos_config.privacy_policy_digest),
code=ErrorCode.INVALID_TOS_SIGNATURE)
attrs['address'] = wallet.address
attrs['tos_config'] = latest_tos_config
return attrs
def should_void_admission(wallet, operator_eon_number, is_checkpoint_created):
if wallet.registration_eon_number != operator_eon_number:
if wallet.registration_eon_number == operator_eon_number - 1 and not is_checkpoint_created:
pass
else:
logger.error('Wallet {} admission stale.'.format(wallet.address))
return True
if BlacklistEntry.objects.filter(address__iexact=wallet.address).exists():
logger.error('Blacklisted address.')
return True
if wallet.registration_authorization.checksum != hex_value(
wallet.get_admission_hash(operator_eon_number)):
logger.error('Invalid authorization checksum for {}.'.format(
wallet.address))
return True
if not wallet.registration_authorization.is_valid():
logger.error('Invalid authorization signature for {}.'.format(
wallet.address))
return True
return False
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 proof(self, index):
return ''.join(
[crypto.hex_value(node_hash) for node_hash in self.paths[index]])
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 merkle_cache_stacks(self):
merkle_hash_stack = [
crypto.hex_value(node.get('hash')) for node in self.stack
]
merkle_height_stack = [str(node.get('height')) for node in self.stack]
return (','.join(merkle_hash_stack), ','.join(merkle_height_stack))
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 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 validate(self, attrs):
admission_requests = attrs.pop('admissions')
if len(admission_requests) > settings.BULK_ADMISSION_LIMIT:
raise serializers.ValidationError(
detail='Expected <= {} but got {} admisson requests.'.format(
settings.BULK_ADMISSION_LIMIT, len(admission_requests)),
code=ErrorCode.TOO_MANY_ADMISSION_REQUESTS)
registration_eon_number = LocalViewInterface.latest().eon_number()
latest_tos_config = TOSConfig.objects.all().order_by('time').last()
attrs['signatures'] = []
attrs['tos_signatures'] = []
attrs['wallets'] = []
all_tokens = {}
for token in Token.objects.all():
all_tokens[token.address.lower()] = token
for admission_request in admission_requests:
address = remove_0x_prefix(admission_request['address'])
token = all_tokens.get(
remove_0x_prefix(admission_request['token']).lower())
if token is None:
raise serializers.ValidationError(
detail='This token {} is not registered.'.format(
admission_request['token']),
code=ErrorCode.TOKEN_NOT_REGISTERED)
if BlacklistEntry.objects.filter(address__iexact=address).exists():
continue
if Wallet.objects.filter(address__iexact=address,
token=token).exists():
continue
wallet = Wallet(token=token,
address=address,
registration_eon_number=registration_eon_number)
admission_hash = hex_value(
wallet.get_admission_hash(registration_eon_number))
signature = Signature(
wallet=wallet,
checksum=admission_hash,
value=admission_request.get('authorization').get('value'))
if not signature.is_valid():
raise serializers.ValidationError(
detail='Invalid authorization for address {} and token {}.'
.format(admission_request['address'],
admission_request['token']),
code=ErrorCode.INVALID_ADMISSION_SIGNATURE)
tos_signature = Signature(
wallet=wallet,
checksum=latest_tos_config.digest(),
value=admission_request.get('tos_signature').get('value'))
if not tos_signature.is_valid():
raise serializers.ValidationError(
detail=
'Invalid TOS (digest: {}) signature for address {} and token {}.'
.format(latest_tos_config.digest(),
admission_request['address'],
admission_request['token']),
code=ErrorCode.INVALID_TOS_SIGNATURE)
attrs['signatures'].append(signature)
attrs['tos_signatures'].append(tos_signature)
attrs['wallets'].append(wallet)
attrs['tos_config'] = latest_tos_config
return attrs
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 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 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 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 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 proof(self, index):
result = calculate_merkle_proof(
index, self.merkle_tree_leaf_map[index])
return ''.join([hex_value(node.get('hash')) for node in result])
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 fetch_contract_state_at_block(self, block_number):
try:
local_params = LocalViewInterface.get_contract_parameters()
current_eon = 1 + \
(block_number - local_params.genesis_block) // local_params.blocks_per_eon
contract_state_variables = self.contract\
.functions\
.getServerContractStateVariables()\
.call(block_identifier=block_number)
basis = contract_state_variables[0]
last_checkpoint_submission_eon = contract_state_variables[1]
last_checkpoint = contract_state_variables[2]
is_checkpoint_submitted_for_current_eon = contract_state_variables[
3]
has_missed_checkpoint_submission = contract_state_variables[4]
live_challenge_count = contract_state_variables[5]
except Exception as exception:
traceback.print_exc()
logger.error('Could not query contract state: {}'.format(
str(exception)))
return None
contract_state = ContractState(
block=block_number,
confirmed=False,
basis=crypto.hex_value(basis),
last_checkpoint_submission_eon=last_checkpoint_submission_eon,
last_checkpoint=crypto.hex_value(last_checkpoint),
is_checkpoint_submitted_for_current_eon=
is_checkpoint_submitted_for_current_eon,
has_missed_checkpoint_submission=has_missed_checkpoint_submission,
live_challenge_count=live_challenge_count)
contract_ledger_states = []
for token in Token.objects.all():
if token.block >= block_number:
continue
try:
contract_state_ledger_variables = self.contract\
.functions\
.getServerContractLedgerStateVariables(current_eon, add_0x_prefix(token.address))\
.call(block_identifier=block_number)
pending_withdrawals = contract_state_ledger_variables[0]
confirmed_withdrawals = contract_state_ledger_variables[1]
deposits = contract_state_ledger_variables[2]
total_balance = contract_state_ledger_variables[3]
contract_ledger_states.append(
ContractLedgerState(
token=token,
pending_withdrawals=pending_withdrawals,
confirmed_withdrawals=confirmed_withdrawals,
deposits=deposits,
total_balance=total_balance))
except Exception as exception:
traceback.print_exc()
logger.error(
'Could not query contract ledger state for {}: {}'.format(
token.address, str(exception)))
contract_ledger_states.append(
ContractLedgerState(token=token,
pending_withdrawals=0,
confirmed_withdrawals=0,
deposits=0,
total_balance=0))
return contract_state, contract_ledger_states
def active_state_checksum(self, obj: ActiveState):
return hex_value(obj.checksum())
