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 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 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 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_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 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_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 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 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]