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':type bid: Bid'
def insert_bid(self, bid):
assert isinstance(bid, Bid), type(bid) if ((not self._bids.tick_exists(bid.order_id)) and bid.is_valid()): self._bids.insert_tick(bid) timeout_delay = ((float(bid.timestamp) + float(bid.timeout)) - time.time()) task = deferLater(reactor, timeout_delay, self.timeout_bid, bid.order_id) ...
':type order_id: OrderId'
def remove_bid(self, order_id):
assert isinstance(order_id, OrderId), type(order_id) if self._bids.tick_exists(order_id): self.cancel_pending_task(('bid_%s_timeout' % order_id)) self._bids.remove_tick(order_id)
':type order_id: OrderId :type recipient_order_id: OrderId :type quantity: Quantity :type end_transaction_timestamp: Timestamp'
def trade_tick(self, order_id, recipient_order_id, quantity, end_transaction_timestamp):
assert isinstance(order_id, OrderId), type(order_id) assert isinstance(recipient_order_id, OrderId), type(recipient_order_id) assert isinstance(quantity, Quantity), type(quantity) self._logger.debug('Trading tick in order book for own order %s vs order %s (quantity: ...
':param order_id: The order id to search for :type order_id: OrderId :return: True if the tick exists, False otherwise :rtype: bool'
def tick_exists(self, order_id):
assert isinstance(order_id, OrderId), type(order_id) is_ask = self._asks.tick_exists(order_id) is_bid = self._bids.tick_exists(order_id) return (is_ask or is_bid)
':param order_id: The order id to search for :type order_id: OrderId :rtype: TickEntry'
def get_ask(self, order_id):
assert isinstance(order_id, OrderId), type(order_id) return self._asks.get_tick(order_id)
':param order_id: The order id to search for :type order_id: OrderId :rtype: TickEntry'
def get_bid(self, order_id):
assert isinstance(order_id, OrderId), type(order_id) return self._bids.get_tick(order_id)
'Return a tick with the specified order id. :param order_id: The order id to search for :type order_id: OrderId :rtype: TickEntry'
def get_tick(self, order_id):
assert isinstance(order_id, OrderId), type(order_id) return (self._bids.get_tick(order_id) or self._asks.get_tick(order_id))
':param order_id: The order id to search for :type order_id: OrderId :return: True if the ask exists, False otherwise :rtype: bool'
def ask_exists(self, order_id):
assert isinstance(order_id, OrderId), type(order_id) return self._asks.tick_exists(order_id)
':param order_id: The order id to search for :type order_id: OrderId :return: True if the bid exists, False otherwise :rtype: bool'
def bid_exists(self, order_id):
assert isinstance(order_id, OrderId), type(order_id) return self._bids.tick_exists(order_id)
':type order_id: OrderId'
def remove_tick(self, order_id):
assert isinstance(order_id, OrderId), type(order_id) self.remove_ask(order_id) self.remove_bid(order_id)
'Return the asks side :rtype: Side'
@property def asks(self):
return self._asks
'Return the bids side :rtype: Side'
@property def bids(self):
return self._bids
'Return the price an ask needs to have to make a trade :rtype: Price'
def get_bid_price(self, price_wallet_id, quantity_wallet_id):
return self._bids.get_max_price(price_wallet_id, quantity_wallet_id)
'Return the price a bid needs to have to make a trade :rtype: Price'
def get_ask_price(self, price_wallet_id, quantity_wallet_id):
return self._asks.get_min_price(price_wallet_id, quantity_wallet_id)
'Return the spread between the bid and the ask price :rtype: Price'
def get_bid_ask_spread(self, price_wallet_id, quantity_wallet_id):
return (self.get_ask_price(price_wallet_id, quantity_wallet_id) - self.get_bid_price(price_wallet_id, quantity_wallet_id))
'Return the price in between the bid and the ask price :rtype: Price'
def get_mid_price(self, price_wallet_id, quantity_wallet_id):
ask_price = int(self.get_ask_price(price_wallet_id, quantity_wallet_id)) bid_price = int(self.get_bid_price(price_wallet_id, quantity_wallet_id)) return Price(((ask_price + bid_price) / 2), price_wallet_id)
'Return the depth of the price level with the given price on the bid side :param price: The price for the price level :type price: Price :return: The depth at that price level :rtype: Quantity'
def bid_side_depth(self, price):
assert isinstance(price, Price), type(price) return self._bids.get_price_level(price).depth
'Return the depth of the price level with the given price on the ask side :param price: The price for the price level :type price: Price :return: The depth at that price level :rtype: Quantity'
def ask_side_depth(self, price):
assert isinstance(price, Price), type(price) return self._asks.get_price_level(price).depth
'format: [(<price>, <depth>), (<price>, <depth>), ...] :return: The depth profile :rtype: list'
def get_bid_side_depth_profile(self, price_wallet_id, quantity_wallet_id):
profile = [] for (key, value) in self._bids.get_price_level_list(price_wallet_id, quantity_wallet_id).items(): profile.append((key, value.depth)) return profile
'format: [(<price>, <depth>), (<price>, <depth>), ...] :return: The depth profile :rtype: list'
def get_ask_side_depth_profile(self, price_wallet_id, quantity_wallet_id):
profile = [] for (key, value) in self._asks.get_price_level_list(price_wallet_id, quantity_wallet_id).items(): profile.append((key, value.depth)) return profile
':param price: The price to be relative to :type price: Price :return: The relative price :rtype: Price'
def bid_relative_price(self, price):
assert isinstance(price, Price), type(price) return (self.get_bid_price('BTC', 'MC') - price)
':param price: The price to be relative to :type price: Price :return: The relative price :rtype: Price'
def ask_relative_price(self, price):
assert isinstance(price, Price), type(price) return (self.get_ask_price('BTC', 'MC') - price)
':param tick: The tick with the price to be relative to :type tick: Tick :return: The relative price :rtype: Price'
def relative_tick_price(self, tick):
assert isinstance(tick, Tick), type(tick) if tick.is_ask(): return self.ask_relative_price(tick.price) else: return self.bid_relative_price(tick.price)
'Return the price level that an ask has to match to make a trade :rtype: PriceLevel'
def get_bid_price_level(self, price_wallet_id, quantity_wallet_id):
return self._bids.get_max_price_list(price_wallet_id, quantity_wallet_id)
'Return the price level that a bid has to match to make a trade :rtype: PriceLevel'
def get_ask_price_level(self, price_wallet_id, quantity_wallet_id):
return self._asks.get_min_price_list(price_wallet_id, quantity_wallet_id)
'Return all IDs of the orders in the orderbook, both asks and bids. The returned list is sorted. :rtype: [OrderId]'
def get_order_ids(self):
ids = [] for (price_wallet_id, quantity_wallet_id) in self.asks.get_price_level_list_wallets(): for (_, price_level) in self.asks.get_price_level_list(price_wallet_id, quantity_wallet_id).items(): for ask in price_level: ids.append(ask.tick.order_id) for (price_wallet_id,...
'Write all ticks to the database'
def save_to_database(self):
self.database.delete_all_ticks() for order_id in self.get_order_ids(): tick = self.get_tick(order_id) if tick.is_valid(): self.database.add_tick(tick.tick)
'Restore ticks from the database'
def restore_from_database(self):
for tick in self.database.get_ticks(): if ((not self.tick_exists(tick.order_id)) and tick.is_valid()): (self.insert_ask(tick) if tick.is_ask() else self.insert_bid(tick))
':param ttl: Integer representation of a time to live :type ttl: int :raises ValueError: Thrown when one of the arguments are invalid'
def __init__(self, ttl):
super(Ttl, self).__init__() if (not isinstance(ttl, int)): raise ValueError('Time to live must be an int') if (ttl < 0): raise ValueError('Time to live must be greater than zero') self._ttl = ttl
'Create a time to live with the default value :return: The ttl :rtype: Ttl'
@classmethod def default(cls):
return cls(cls.DEFAULT)
'Check if the ttl is still hig enough to be send on :return: True if it is alive, False otherwise :rtype: bool'
def is_alive(self):
return (self._ttl > 0)
'Makes a hop by reducing the ttl by 1, to simulate the message being relayed through a node'
def make_hop(self):
self._ttl -= 1
':rtype: TickEntry'
@property def first_tick(self):
return self._head_tick
'Return the length of the amount of ticks contained in the price level :rtype: integer'
@property def length(self):
return self._length
'The depth is equal to the total amount of volume contained in this price level :rtype: Quantity'
@property def depth(self):
return self._depth
':param new_depth: The new depth :type new_depth: Quantity'
@depth.setter def depth(self, new_depth):
assert isinstance(new_depth, Quantity), type(new_depth) self._depth = new_depth
'Return the length of the amount of ticks contained in the price level'
def __len__(self):
return self.length
'Return the next tick in the price level for the iterator'
def next(self):
if (self._last is None): raise StopIteration else: return_value = self._last self._last = self._last.next_tick return return_value
':type tick: TickEntry'
def append_tick(self, tick):
assert isinstance(tick, TickEntry), type(tick) assert (tick.quantity.wallet_id == self._quantity_wallet_id) if (self._length == 0): tick.prev_tick = None tick.next_tick = None self._head_tick = tick self._tail_tick = tick else: tick.prev_tick = self._tail_tick ...
':type tick: TickEntry'
def remove_tick(self, tick):
assert isinstance(tick, TickEntry), type(tick) self._depth -= tick.quantity self._length -= 1 if (self._length == 0): return prev_tick = tick.prev_tick next_tick = tick.next_tick if ((prev_tick is not None) and (next_tick is not None)): prev_tick.next_tick = next_tick ...
':type transaction_repository: TransactionRepository'
def __init__(self, transaction_repository):
super(TransactionManager, self).__init__() self._logger = logging.getLogger(self.__class__.__name__) self._logger.info('Transaction Manager initialized') assert isinstance(transaction_repository, TransactionRepository), type(transaction_repository) self.transaction_repository = transaction_rep...
':type proposed_trade: ProposedTrade :rtype: Transaction'
def create_from_proposed_trade(self, proposed_trade):
assert isinstance(proposed_trade, ProposedTrade), type(proposed_trade) transaction = Transaction.from_proposed_trade(proposed_trade, self.transaction_repository.next_identity()) self.transaction_repository.add(transaction) self._logger.info('Transaction created with id: %s, quantity: %...
':type start_transaction: StartTransaction :rtype: Transaction'
def create_from_start_transaction(self, start_transaction):
assert isinstance(start_transaction, StartTransaction), type(start_transaction) transaction = Transaction(start_transaction.transaction_id, start_transaction.price, start_transaction.quantity, start_transaction.recipient_order_id, start_transaction.order_id, Timestamp.now()) self.transaction_repository.add(...
':param transaction_id: The transaction id to look for :type transaction_id: TransactionId :return: The transaction or null if it cannot be found :rtype: Transaction'
def find_by_id(self, transaction_id):
assert isinstance(transaction_id, TransactionId), type(transaction_id) return self.transaction_repository.find_by_id(transaction_id)
':rtype: [Transaction]'
def find_all(self):
return self.transaction_repository.find_all()
':type transaction_number: int :raises ValueError: Thrown when one of the arguments are invalid'
def __init__(self, transaction_number):
super(TransactionNumber, self).__init__() if (not isinstance(transaction_number, int)): raise ValueError('Transaction number must be an integer') self._transaction_number = transaction_number
':param trader_id: The trader id who created the order :param transaction_number: The number of the transaction created :type trader_id: TraderId :type transaction_number: TransactionNumber'
def __init__(self, trader_id, transaction_number):
super(TransactionId, self).__init__() assert isinstance(trader_id, TraderId), type(trader_id) assert isinstance(transaction_number, TransactionNumber), type(transaction_number) self._trader_id = trader_id self._transaction_number = transaction_number
':rtype: TraderId'
@property def trader_id(self):
return self._trader_id
':rtype: TransactionNumber'
@property def transaction_number(self):
return self._transaction_number
'format: <trader_id>.<transaction_number>'
def __str__(self):
return ('%s.%s' % (self.trader_id, self.transaction_number))
':param transaction_id: An transaction id to identify the order :param price: A price to indicate for which amount to sell or buy :param quantity: A quantity to indicate how much to sell or buy :param order_id: The id of your order for this transaction :param partner_order_id: The id of the order of the other party :pa...
def __init__(self, transaction_id, price, quantity, order_id, partner_order_id, timestamp):
super(Transaction, self).__init__() self._logger = logging.getLogger(self.__class__.__name__) assert isinstance(transaction_id, TransactionId), type(transaction_id) assert isinstance(price, Price), type(price) assert isinstance(quantity, Quantity), type(quantity) assert isinstance(order_id, Orde...
'Create a Transaction object based on information in the database.'
@classmethod def from_database(cls, data, payments):
(trader_id, transaction_number, order_trader_id, order_number, partner_trader_id, partner_order_number, price, price_type, transferred_price, quantity, quantity_type, transferred_quantity, transaction_timestamp, sent_wallet_info, received_wallet_info, incoming_address, outgoing_address, partner_incoming_address, pa...
'Returns a database representation of a Transaction object. :rtype: tuple'
def to_database(self):
return (unicode(self.transaction_id.trader_id), int(self.transaction_id.transaction_number), unicode(self.order_id.trader_id), int(self.order_id.order_number), unicode(self.partner_order_id.trader_id), int(self.partner_order_id.order_number), float(self.price), unicode(self.price.wallet_id), float(self.transferred_...
':param proposed_trade: The proposed trade to create the transaction for :param transaction_id: The transaction id to use for this transaction :type proposed_trade: ProposedTrade :type transaction_id: TransactionId :return: The created transaction :rtype: Transaction'
@classmethod def from_proposed_trade(cls, proposed_trade, transaction_id):
assert isinstance(proposed_trade, ProposedTrade), type(proposed_trade) assert isinstance(transaction_id, TransactionId), type(transaction_id) return cls(transaction_id, proposed_trade.price, proposed_trade.quantity, proposed_trade.recipient_order_id, proposed_trade.order_id, proposed_trade.timestamp)
':rtype: TransactionId'
@property def transaction_id(self):
return self._transaction_id
':rtype: Price'
@property def price(self):
return self._price
':rtype: Price'
@property def total_price(self):
return self._total_price
':rtype: Price'
@property def transferred_price(self):
return self._transferred_price
':rtype: Quantity'
@property def total_quantity(self):
return self._quantity
':rtype: Quantity'
@property def transferred_quantity(self):
return self._transferred_quantity
'Return the id of your order :rtype: OrderId'
@property def order_id(self):
return self._order_id
':rtype: OrderId'
@property def partner_order_id(self):
return self._partner_order_id
':rtype: [Payment]'
@property def payments(self):
return self._payments
':rtype: Timestamp'
@property def timestamp(self):
return self._timestamp
'Return the status of this transaction, can be one of these: "pending", "completed", "error". :rtype: str'
@property def status(self):
if len([payment for payment in self.payments if (not payment.success)]): return 'error' return ('completed' if self.is_payment_complete() else 'pending')
'Return an a amount that is a multiple of min_unit.'
@staticmethod def unitize(amount, min_unit):
if ((Decimal(str(amount)) % Decimal(str(min_unit))) == Decimal(0)): return amount return ((int((amount / min_unit)) + 1) * min_unit)
'Return a dictionary with a representation of this transaction.'
def to_dictionary(self):
return {'trader_id': str(self.transaction_id.trader_id), 'order_number': int(self.order_id.order_number), 'partner_trader_id': str(self.partner_order_id.trader_id), 'partner_order_number': int(self.partner_order_id.order_number), 'transaction_number': int(self.transaction_id.transaction_number), 'price': float(self...
':param message_id: A message id to identify the message :param transaction_id: A transaction id to identify the transaction :param order_id: My order id :param recipient_order_id: The order id of the recipient of this message :param proposal_id: The proposal ID associated with this start transaction message :param pri...
def __init__(self, message_id, transaction_id, order_id, recipient_order_id, proposal_id, price, quantity, timestamp):
super(StartTransaction, self).__init__(message_id, timestamp) assert isinstance(transaction_id, TransactionId), type(transaction_id) assert isinstance(order_id, OrderId), type(order_id) assert isinstance(recipient_order_id, OrderId), type(order_id) assert isinstance(proposal_id, int), type(proposal_...
':rtype: TransactionId'
@property def transaction_id(self):
return self._transaction_id
':rtype: OrderId'
@property def order_id(self):
return self._order_id
':rtype: OrderId'
@property def recipient_order_id(self):
return self._recipient_order_id
':return: The proposal id :rtype: int'
@property def proposal_id(self):
return self._proposal_id
':return: The price :rtype: Price'
@property def price(self):
return self._price
':return: The quantity :rtype: Quantity'
@property def quantity(self):
return self._quantity
'Restore a start transaction message from the network :param data: StartTransactionPayload :return: Restored start transaction :rtype: StartTransaction'
@classmethod def from_network(cls, data):
assert hasattr(data, 'trader_id'), isinstance(data.trader_id, TraderId) assert hasattr(data, 'message_number'), isinstance(data.message_number, MessageNumber) assert hasattr(data, 'transaction_trader_id'), isinstance(data.transaction_trader_id, TraderId) assert hasattr(data, 'transaction_number'), isins...
'Return network representation of the start transaction message'
def to_network(self):
return (self._message_id.trader_id, self._message_id.message_number, self._transaction_id.trader_id, self._transaction_id.transaction_number, self._order_id.trader_id, self._order_id.order_number, self._recipient_order_id.trader_id, self._recipient_order_id.order_number, self._proposal_id, self._price, self._quanti...
'Don\'t use this method directly, use one of the class methods. :param message_id: A message id to identify the trade :param order_id: A order id to identify the order :param recipient_order_id: A order id to identify the traded party :param proposal_id: The ID of the trade proposal :param timestamp: A timestamp wen th...
def __init__(self, message_id, order_id, recipient_order_id, proposal_id, timestamp):
super(Trade, self).__init__(message_id, timestamp) assert isinstance(order_id, OrderId), type(order_id) assert isinstance(recipient_order_id, OrderId), type(recipient_order_id) assert isinstance(proposal_id, int), type(proposal_id) self._order_id = order_id self._recipient_order_id = recipient_o...
'Propose a trade to another node :param message_id: A message id to identify the trade :param order_id: A order id to identify the order :param recipient_order_id: A order id to identify the traded party :param price: A price for the trade :param quantity: A quantity to be traded :param timestamp: A timestamp wen this ...
@classmethod def propose(cls, message_id, order_id, recipient_order_id, price, quantity, timestamp):
return ProposedTrade(message_id, order_id, recipient_order_id, random.randint(0, 100000000), price, quantity, timestamp)
'Decline a trade from another node :param message_id: A message id to identify the trade :param timestamp: A timestamp when the trade was declined :param proposed_trade: A proposed trade that needs to be declined :type message_id: MessageId :type timestamp: Timestamp :type proposed_trade: ProposedTrade :return: A decli...
@classmethod def decline(cls, message_id, timestamp, proposed_trade):
assert isinstance(proposed_trade, ProposedTrade), type(proposed_trade) return DeclinedTrade(message_id, proposed_trade.recipient_order_id, proposed_trade.order_id, proposed_trade.proposal_id, timestamp)
'Counter a trade from another node :param message_id: A message id to identify the trade :param quantity: The quantity to use for the counter offer :param timestamp: A timestamp when the trade was countered :param proposed_trade: A proposed trade that needs to be countered :type message_id: MessageId :type quantity: Qu...
@classmethod def counter(cls, message_id, quantity, timestamp, proposed_trade):
assert isinstance(proposed_trade, ProposedTrade), type(proposed_trade) return CounterTrade(message_id, proposed_trade.recipient_order_id, proposed_trade.order_id, proposed_trade.proposal_id, proposed_trade.price, quantity, timestamp)
':return: The order id :rtype: OrderId'
@property def order_id(self):
return self._order_id
':return: The order id :rtype: OrderId'
@property def recipient_order_id(self):
return self._recipient_order_id
':return: The proposal id :rtype: int'
@property def proposal_id(self):
return self._proposal_id
'Don\'t use this method directly, use the class methods from Trade or use the from_network :param message_id: A message id to identify the trade :param order_id: A order id to identify the order :param recipient_order_id: A order id to identify the traded party :param proposal_id: The ID of the trade proposal :param pr...
def __init__(self, message_id, order_id, recipient_order_id, proposal_id, price, quantity, timestamp):
super(ProposedTrade, self).__init__(message_id, order_id, recipient_order_id, proposal_id, timestamp) assert isinstance(price, Price), type(price) assert isinstance(quantity, Quantity), type(quantity) self._price = price self._quantity = quantity
'Restore a proposed trade from the network :param data: TradePayload :return: Restored proposed trade :rtype: ProposedTrade'
@classmethod def from_network(cls, data):
assert hasattr(data, 'trader_id'), isinstance(data.trader_id, TraderId) assert hasattr(data, 'message_number'), isinstance(data.message_number, MessageNumber) assert hasattr(data, 'order_number'), isinstance(data.order_number, OrderNumber) assert hasattr(data, 'recipient_trader_id'), isinstance(data.rec...
':return: The price :rtype: Price'
@property def price(self):
return self._price
':return: The quantity :rtype: Quantity'
@property def quantity(self):
return self._quantity
'Return whether this trade proposal has an acceptable price. :rtype: bool'
def has_acceptable_price(self, is_ask, order_price):
return ((is_ask and (self.price >= order_price)) or ((not is_ask) and (self.price <= order_price)))
'Return network representation of a proposed trade'
def to_network(self):
return (self._recipient_order_id.trader_id, (self._order_id.trader_id, self._message_id.message_number, self._order_id.order_number, self._recipient_order_id.trader_id, self._recipient_order_id.order_number, self._proposal_id, self._price, self._quantity, self._timestamp))
'Don\'t use this method directly, use one of the class methods of Trade or use from_network :param message_id: A message id to identify the trade :param order_id: A order id to identify the order :param recipient_order_id: A order id to identify the traded party :param proposal_id: The ID of the trade proposal :param p...
def __init__(self, message_id, order_id, recipient_order_id, proposal_id, price, quantity, timestamp):
super(CounterTrade, self).__init__(message_id, order_id, recipient_order_id, proposal_id, price, quantity, timestamp)
'Restore a counter trade from the network :param data: TradePayload :return: Restored counter trade :rtype: CounterTrade'
@classmethod def from_network(cls, data):
assert hasattr(data, 'trader_id'), isinstance(data.trader_id, TraderId) assert hasattr(data, 'message_number'), isinstance(data.message_number, MessageNumber) assert hasattr(data, 'order_number'), isinstance(data.order_number, OrderNumber) assert hasattr(data, 'recipient_trader_id'), isinstance(data.rec...
'Return network representation of a counter trade'
def to_network(self):
return (self._recipient_order_id.trader_id, (self._order_id.trader_id, self._message_id.message_number, self._order_id.order_number, self._recipient_order_id.trader_id, self._recipient_order_id.order_number, self._proposal_id, self._price, self._quantity, self._timestamp))
'Don\'t use this method directly, use one of the class methods from Trade or the from_network :param message_id: A message id to identify the trade :param order_id: A order id to identify the order :param recipient_order_id: A order id to identify the order :param proposal_id: The ID of the trade proposal :param timest...
def __init__(self, message_id, order_id, recipient_order_id, proposal_id, timestamp):
super(DeclinedTrade, self).__init__(message_id, order_id, recipient_order_id, proposal_id, timestamp)
'Restore a declined trade from the network :param data: DeclinedTradePayload :return: Restored declined trade :rtype: DeclinedTrade'
@classmethod def from_network(cls, data):
assert hasattr(data, 'trader_id'), isinstance(data.trader_id, TraderId) assert hasattr(data, 'message_number'), isinstance(data.message_number, MessageNumber) assert hasattr(data, 'order_number'), isinstance(data.order_number, OrderNumber) assert hasattr(data, 'recipient_trader_id'), isinstance(data.rec...
'Return network representation of a declined trade'
def to_network(self):
return (self._recipient_order_id.trader_id, (self._order_id.trader_id, self._message_id.message_number, self._order_id.order_number, self._recipient_order_id.trader_id, self._recipient_order_id.order_number, self._proposal_id, self._timestamp))
':param ip: String representation of an ipv4 address :type ip: str :param port: Integer representation of a port :type port: int :raises ValueError: Thrown when one of the arguments are invalid'
def __init__(self, ip, port):
super(SocketAddress, self).__init__() assert isinstance(ip, str), type(ip) assert isinstance(port, int), type(port) if (not is_valid_address((ip, port))): raise ValueError('Address is not valid') self._ip = ip self._port = port
':return: The ip :rtype: str'
@property def ip(self):
return self._ip
':return: The port :rtype: int'
@property def port(self):
return self._port
':param price: Integer representation of a price that is positive or zero :param wallet_id: Identifier of the wallet type of this price :type price: float :type wallet_id: str :raises ValueError: Thrown when one of the arguments are invalid'
def __init__(self, price, wallet_id):
super(Price, self).__init__() if (not isinstance(price, (int, float))): raise ValueError('Price must be an int or a float') if (not isinstance(wallet_id, str)): raise ValueError('Wallet id must be a string') if (price < 0): raise ValueError('Pr...
':rtype: str'
@property def wallet_id(self):
return self._wallet_id