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())