class OasisMarketMakerKeeper: """Keeper acting as a market maker on OasisDEX, on the W-ETH/SAI pair.""" logger = logging.getLogger() def __init__(self, args: list, **kwargs): parser = argparse.ArgumentParser(prog='oasis-market-maker-keeper') parser.add_argument("--rpc-host", type=str, default="localhost", help="JSON-RPC host (default: `localhost')") parser.add_argument("--rpc-port", type=int, default=8545, help="JSON-RPC port (default: `8545')") parser.add_argument("--rpc-timeout", type=int, default=10, help="JSON-RPC timeout (in seconds, default: 10)") parser.add_argument( "--eth-from", type=str, required=True, help="Ethereum account from which to send transactions") parser.add_argument("--tub-address", type=str, required=True, help="Ethereum address of the Tub contract") parser.add_argument("--oasis-address", type=str, required=True, help="Ethereum address of the OasisDEX contract") parser.add_argument("--config", type=str, required=True, help="Bands configuration file") parser.add_argument("--price-feed", type=str, required=True, help="Source of price feed") parser.add_argument( "--price-feed-expiry", type=int, default=120, help="Maximum age of the price feed (in seconds, default: 120)") parser.add_argument( "--round-places", type=int, default=2, help="Number of decimal places to round order prices to (default=2)" ) parser.add_argument( "--min-eth-balance", type=float, default=0, help="Minimum ETH balance below which keeper will cease operation") parser.add_argument("--gas-price", type=int, default=0, help="Gas price (in Wei)") parser.add_argument( "--smart-gas-price", dest='smart_gas_price', action='store_true', help= "Use smart gas pricing strategy, based on the ethgasstation.info feed" ) parser.add_argument("--debug", dest='debug', action='store_true', help="Enable debug output") self.arguments = parser.parse_args(args) setup_logging(self.arguments) self.web3 = kwargs['web3'] if 'web3' in kwargs else Web3( HTTPProvider( endpoint_uri= f"http://{self.arguments.rpc_host}:{self.arguments.rpc_port}", request_kwargs={"timeout": self.arguments.rpc_timeout})) self.web3.eth.defaultAccount = self.arguments.eth_from self.our_address = Address(self.arguments.eth_from) self.otc = MatchingMarket(web3=self.web3, address=Address( self.arguments.oasis_address)) self.tub = Tub(web3=self.web3, address=Address(self.arguments.tub_address)) self.sai = ERC20Token(web3=self.web3, address=self.tub.sai()) self.gem = ERC20Token(web3=self.web3, address=self.tub.gem()) self.min_eth_balance = Wad.from_number(self.arguments.min_eth_balance) self.bands_config = ReloadableConfig(self.arguments.config) self.gas_price = GasPriceFactory().create_gas_price(self.arguments) self.price_feed = PriceFeedFactory().create_price_feed( self.arguments.price_feed, self.arguments.price_feed_expiry, self.tub) self.order_book_manager = OrderBookManager(refresh_frequency=3) self.order_book_manager.get_orders_with(lambda: self.our_orders()) self.order_book_manager.start() def main(self): with Lifecycle(self.web3) as lifecycle: lifecycle.initial_delay(10) lifecycle.on_startup(self.startup) lifecycle.on_block(self.on_block) lifecycle.every(3, self.synchronize_orders) lifecycle.on_shutdown(self.shutdown) def startup(self): self.approve() @retry(delay=5, logger=logger) def shutdown(self): self.cancel_all_orders() def on_block(self): # This method is present only so the lifecycle binds the new block listener, which makes # it then terminate the keeper if no new blocks have been arriving for 300 seconds. pass def approve(self): """Approve OasisDEX to access our balances, so we can place orders.""" self.otc.approve( [self.token_sell(), self.token_buy()], directly(gas_price=self.gas_price)) def price(self) -> Wad: return self.price_feed.get_price() def token_sell(self) -> ERC20Token: return self.gem def token_buy(self) -> ERC20Token: return self.sai def our_available_balance(self, token: ERC20Token) -> Wad: return token.balance_of(self.our_address) def our_orders(self): return list( filter( lambda order: order.maker == self.our_address, self.otc.get_orders(self.token_sell().address, self.token_buy().address) + self.otc.get_orders(self.token_buy().address, self.token_sell().address))) def our_sell_orders(self, our_orders: list): return list( filter( lambda order: order.buy_token == self.token_buy().address and order.pay_token == self.token_sell().address, our_orders)) def our_buy_orders(self, our_orders: list): return list( filter( lambda order: order.buy_token == self.token_sell().address and order.pay_token == self.token_buy().address, our_orders)) def synchronize_orders(self): # If market is closed, cancel all orders but do not terminate the keeper. if self.otc.is_closed(): self.logger.warning("Market is closed. Cancelling all orders.") self.cancel_all_orders() return # If keeper balance is below `--min-eth-balance`, cancel all orders but do not terminate # the keeper, keep processing blocks as the moment the keeper gets a top-up it should # resume activity straight away, without the need to restart it. if eth_balance(self.web3, self.our_address) < self.min_eth_balance: self.logger.warning( "Keeper ETH balance below minimum. Cancelling all orders.") self.cancel_all_orders() return bands = Bands(self.bands_config) order_book = self.order_book_manager.get_order_book() target_price = self.price() # If the is no target price feed, cancel all orders but do not terminate the keeper. # The moment the price feed comes back, the keeper will resume placing orders. if target_price is None: self.logger.warning( "No price feed available. Cancelling all orders.") self.cancel_all_orders() return # If there are any orders to be cancelled, cancel them. It is deliberate that we wait with topping-up # bands until the next block. This way we would create new orders based on the most recent price and # order book state. We could theoretically retrieve both (`target_price` and `our_orders`) again here, # but it just seems cleaner to do it in one place instead of in two. cancellable_orders = bands.cancellable_orders( our_buy_orders=self.our_buy_orders(order_book.orders), our_sell_orders=self.our_sell_orders(order_book.orders), target_price=target_price) if len(cancellable_orders) > 0: self.cancel_orders(cancellable_orders) return # Do not place new orders if order book state is not confirmed if order_book.orders_being_placed or order_book.orders_being_cancelled: self.logger.debug( "Order book is in progress, not placing new orders") return # Place new orders self.create_orders( bands.new_orders( our_buy_orders=self.our_buy_orders(order_book.orders), our_sell_orders=self.our_sell_orders(order_book.orders), our_buy_balance=self.our_available_balance(self.token_buy()), our_sell_balance=self.our_available_balance(self.token_sell()), target_price=target_price)[0]) def cancel_all_orders(self): # Wait for the order book to stabilize while True: order_book = self.order_book_manager.get_order_book() if not order_book.orders_being_cancelled and not order_book.orders_being_placed: break # Cancel all open orders self.cancel_orders(self.order_book_manager.get_order_book().orders) self.order_book_manager.wait_for_order_cancellation() def cancel_orders(self, orders): for order in orders: self.order_book_manager.cancel_order( order.order_id, lambda: self.otc.kill(order.order_id).transact( gas_price=self.gas_price).successful) def create_orders(self, new_orders): def place_order_function(new_order: NewOrder): assert (isinstance(new_order, NewOrder)) if new_order.is_sell: pay_token = self.token_sell().address buy_token = self.token_buy().address else: pay_token = self.token_buy().address buy_token = self.token_sell().address transact = self.otc.make(pay_token=pay_token, pay_amount=new_order.pay_amount, buy_token=buy_token, buy_amount=new_order.buy_amount).transact( gas_price=self.gas_price) if transact is not None and transact.successful and transact.result is not None: return Order(market=self.otc, order_id=transact.result, maker=self.our_address, pay_token=pay_token, pay_amount=new_order.pay_amount, buy_token=buy_token, buy_amount=new_order.buy_amount, timestamp=0) else: return None for new_order in new_orders: self.order_book_manager.place_order( lambda: place_order_function(new_order))
class OkexMarketMakerKeeper: """Keeper acting as a market maker on OKEX.""" logger = logging.getLogger() def __init__(self, args: list, **kwargs): parser = argparse.ArgumentParser(prog='okex-market-maker-keeper') parser.add_argument( "--okex-api-server", type=str, default="https://www.okex.com", help= "Address of the OKEX API server (default: 'https://www.okex.com')") parser.add_argument("--okex-api-key", type=str, required=True, help="API key for the OKEX API") parser.add_argument("--okex-secret-key", type=str, required=True, help="Secret key for the OKEX API") parser.add_argument( "--pair", type=str, required=True, help="Token pair on which the keeper should operate") parser.add_argument("--config", type=str, required=True, help="Buy/sell bands configuration file") parser.add_argument("--price-feed", type=str, help="Source of price feed") parser.add_argument( "--price-feed-expiry", type=int, default=120, help="Maximum age of the price feed (in seconds, default: 120)") parser.add_argument("--debug", dest='debug', action='store_true', help="Enable debug output") self.arguments = parser.parse_args(args) logging.basicConfig( format='%(asctime)-15s %(levelname)-8s %(message)s', level=(logging.DEBUG if self.arguments.debug else logging.INFO)) logging.getLogger('urllib3.connectionpool').setLevel(logging.INFO) logging.getLogger('requests.packages.urllib3.connectionpool').setLevel( logging.INFO) self.bands_config = ReloadableConfig(self.arguments.config) self.price_feed = PriceFeedFactory().create_price_feed( self.arguments.price_feed, self.arguments.price_feed_expiry) self.okex_api = OKEXApi(api_server=self.arguments.okex_api_server, api_key=self.arguments.okex_api_key, secret_key=self.arguments.okex_secret_key, timeout=9.5) def main(self): with Lifecycle() as lifecycle: lifecycle.on_startup(self.startup) lifecycle.every(1, self.synchronize_orders) lifecycle.on_shutdown(self.shutdown) def startup(self): self.our_orders() self.logger.info(f"OKEX API key seems to be valid") self.logger.info( f"Keeper configured to work on the '{self.pair()}' pair") def shutdown(self): self.cancel_orders(self.our_orders()) def pair(self): return self.arguments.pair.lower() def token_sell(self) -> str: return self.arguments.pair.split('_')[0].lower() def token_buy(self) -> str: return self.arguments.pair.split('_')[1].lower() def our_balances(self) -> dict: return self.okex_api.get_balances() def our_balance(self, our_balances: dict, token: str) -> Wad: return Wad.from_number(our_balances['free'][token]) def our_orders(self) -> list: return self.okex_api.get_orders(self.pair()) def our_sell_orders(self, our_orders: list) -> list: return list(filter(lambda order: order.is_sell, our_orders)) def our_buy_orders(self, our_orders: list) -> list: return list(filter(lambda order: not order.is_sell, our_orders)) def synchronize_orders(self): bands = Bands(self.bands_config) our_balances = self.our_balances() our_orders = self.our_orders() target_price = self.price_feed.get_price() if target_price is None: self.logger.warning( "Cancelling all orders as no price feed available.") self.cancel_orders(our_orders) return # Cancel orders cancellable_orders = bands.cancellable_orders( our_buy_orders=self.our_buy_orders(our_orders), our_sell_orders=self.our_sell_orders(our_orders), target_price=target_price) if len(cancellable_orders) > 0: self.cancel_orders(cancellable_orders) return # Place new orders self.create_orders( bands.new_orders( our_buy_orders=self.our_buy_orders(our_orders), our_sell_orders=self.our_sell_orders(our_orders), our_buy_balance=self.our_balance(our_balances, self.token_buy()), our_sell_balance=self.our_balance(our_balances, self.token_sell()), target_price=target_price)) def cancel_orders(self, orders): for order in orders: self.okex_api.cancel_order(self.pair(), order.order_id) def create_orders(self, orders): for order in orders: amount = order.pay_amount if order.is_sell else order.buy_amount self.okex_api.place_order(pair=self.pair(), is_sell=order.is_sell, price=order.price, amount=amount)
class ParadexMarketMakerKeeper: """Keeper acting as a market maker on Paradex.""" logger = logging.getLogger() def __init__(self, args: list, **kwargs): parser = argparse.ArgumentParser(prog='paradex-market-maker-keeper') parser.add_argument("--rpc-host", type=str, default="localhost", help="JSON-RPC host (default: `localhost')") parser.add_argument("--rpc-port", type=int, default=8545, help="JSON-RPC port (default: `8545')") parser.add_argument("--rpc-timeout", type=int, default=10, help="JSON-RPC timeout (in seconds, default: 10)") parser.add_argument( "--eth-from", type=str, required=True, help="Ethereum account from which to send transactions") parser.add_argument( "--eth-key-file", type=str, required=True, help="File with the private key file for the Ethereum account") parser.add_argument( "--eth-password-file", type=str, required=True, help="File with the private key password for the Ethereum account") parser.add_argument( "--exchange-address", type=str, required=True, help="Ethereum address of the 0x Exchange contract") parser.add_argument( "--paradex-api-server", type=str, default='https://api.paradex.io/consumer', help= "Address of the Paradex API (default: 'https://api.paradex.io/consumer')" ) parser.add_argument("--paradex-api-key", type=str, required=True, help="API key for the Paradex API") parser.add_argument( "--paradex-api-timeout", type=float, default=9.5, help= "Timeout for accessing the Paradex API (in seconds, default: 9.5)") parser.add_argument( "--pair", type=str, required=True, help="Token pair (sell/buy) on which the keeper will operate") parser.add_argument("--buy-token-address", type=str, required=True, help="Ethereum address of the buy token") parser.add_argument("--sell-token-address", type=str, required=True, help="Ethereum address of the sell token") parser.add_argument("--config", type=str, required=True, help="Bands configuration file") parser.add_argument("--price-feed", type=str, required=True, help="Source of price feed") parser.add_argument( "--price-feed-expiry", type=int, default=120, help="Maximum age of the price feed (in seconds, default: 120)") parser.add_argument( "--order-expiry", type=int, required=True, help="Expiration time of created orders (in seconds)") parser.add_argument( "--min-eth-balance", type=float, default=0, help="Minimum ETH balance below which keeper will cease operation") parser.add_argument("--gas-price", type=int, default=0, help="Gas price (in Wei)") parser.add_argument( "--smart-gas-price", dest='smart_gas_price', action='store_true', help= "Use smart gas pricing strategy, based on the ethgasstation.info feed" ) parser.add_argument("--debug", dest='debug', action='store_true', help="Enable debug output") self.arguments = parser.parse_args(args) setup_logging(self.arguments) self.web3 = kwargs['web3'] if 'web3' in kwargs else Web3( HTTPProvider( endpoint_uri= f"http://{self.arguments.rpc_host}:{self.arguments.rpc_port}", request_kwargs={"timeout": self.arguments.rpc_timeout})) self.web3.eth.defaultAccount = self.arguments.eth_from self.our_address = Address(self.arguments.eth_from) self.min_eth_balance = Wad.from_number(self.arguments.min_eth_balance) self.bands_config = ReloadableConfig(self.arguments.config) self.gas_price = GasPriceFactory().create_gas_price(self.arguments) self.price_feed = PriceFeedFactory().create_price_feed( self.arguments.price_feed, self.arguments.price_feed_expiry) self.zrx_exchange = ZrxExchange(web3=self.web3, address=Address( self.arguments.exchange_address)) self.paradex_api = ParadexApi( self.zrx_exchange, self.arguments.paradex_api_server, self.arguments.paradex_api_key, self.arguments.paradex_api_timeout, self.arguments.eth_key_file, self.read_password(self.arguments.eth_password_file)) @staticmethod def read_password(filename: str): with open(filename) as file: return "".join(line.rstrip() for line in file) def main(self): with Lifecycle(self.web3) as lifecycle: lifecycle.initial_delay(10) lifecycle.on_startup(self.startup) lifecycle.every(3, self.synchronize_orders) lifecycle.on_shutdown(self.shutdown) def startup(self): self.approve() @retry(delay=5, logger=logger) def shutdown(self): self.cancel_orders(self.our_orders()) def approve(self): self.zrx_exchange.approve( [self.token_sell(), self.token_buy()], directly(gas_price=self.gas_price)) def price(self) -> Wad: return self.price_feed.get_price() def pair(self): return self.arguments.pair.upper() def token_sell(self) -> ERC20Token: return ERC20Token(web3=self.web3, address=Address(self.arguments.sell_token_address)) def token_buy(self) -> ERC20Token: return ERC20Token(web3=self.web3, address=Address(self.arguments.buy_token_address)) def our_total_balance(self, token: ERC20Token) -> Wad: return token.balance_of(self.our_address) def our_orders(self) -> list: return self.paradex_api.get_orders(self.pair()) def our_sell_orders(self, our_orders: list) -> list: return list(filter(lambda order: order.is_sell, our_orders)) def our_buy_orders(self, our_orders: list) -> list: return list(filter(lambda order: not order.is_sell, our_orders)) def synchronize_orders(self): """Update our positions in the order book to reflect keeper parameters.""" if eth_balance(self.web3, self.our_address) < self.min_eth_balance: self.logger.warning( "Keeper ETH balance below minimum. Cancelling all orders.") self.cancel_orders(self.our_orders()) return bands = Bands(self.bands_config) our_orders = self.our_orders() target_price = self.price() if target_price is None: self.logger.warning( "Cancelling all orders as no price feed available.") self.cancel_orders(our_orders) return # Cancel orders cancellable_orders = bands.cancellable_orders( our_buy_orders=self.our_buy_orders(our_orders), our_sell_orders=self.our_sell_orders(our_orders), target_price=target_price) if len(cancellable_orders) > 0: self.cancel_orders(cancellable_orders) return # In case of Paradex, balances returned by `our_total_balance` still contain amounts "locked" # by currently open orders, so we need to explicitly subtract these amounts. our_buy_balance = self.our_total_balance( self.token_buy()) - Bands.total_amount( self.our_buy_orders(our_orders)) our_sell_balance = self.our_total_balance( self.token_sell()) - Bands.total_amount( self.our_sell_orders(our_orders)) # Place new orders self.create_orders( bands.new_orders(our_buy_orders=self.our_buy_orders(our_orders), our_sell_orders=self.our_sell_orders(our_orders), our_buy_balance=our_buy_balance, our_sell_balance=our_sell_balance, target_price=target_price)[0]) def cancel_orders(self, orders): for order in orders: self.paradex_api.cancel_order(order.order_id) def create_orders(self, orders): for order in orders: amount = order.pay_amount if order.is_sell else order.buy_amount self.paradex_api.place_order(self.pair(), order.is_sell, order.price, amount, self.arguments.order_expiry) exit(-1)
class EtherDeltaMarketMakerKeeper: """Keeper acting as a market maker on EtherDelta, on the ETH/SAI pair.""" logger = logging.getLogger() def __init__(self, args: list, **kwargs): parser = argparse.ArgumentParser(prog='etherdelta-market-maker-keeper') parser.add_argument("--rpc-host", type=str, default="localhost", help="JSON-RPC host (default: `localhost')") parser.add_argument("--rpc-port", type=int, default=8545, help="JSON-RPC port (default: `8545')") parser.add_argument("--rpc-timeout", type=int, default=10, help="JSON-RPC timeout (in seconds, default: 10)") parser.add_argument( "--eth-from", type=str, required=True, help="Ethereum account from which to send transactions") parser.add_argument("--tub-address", type=str, required=True, help="Ethereum address of the Tub contract") parser.add_argument("--etherdelta-address", type=str, required=True, help="Ethereum address of the EtherDelta contract") parser.add_argument( "--etherdelta-socket", type=str, required=True, help="Ethereum address of the EtherDelta API socket") parser.add_argument( "--etherdelta-number-of-attempts", type=int, default=3, help= "Number of attempts of running the tool to talk to the EtherDelta API socket" ) parser.add_argument( "--etherdelta-retry-interval", type=int, default=10, help= "Retry interval for sending orders over the EtherDelta API socket") parser.add_argument( "--etherdelta-timeout", type=int, default=120, help="Timeout for sending orders over the EtherDelta API socket") parser.add_argument("--config", type=str, required=True, help="Buy/sell bands configuration file") parser.add_argument( "--price-feed", type=str, help= "Source of price feed. Tub price feed will be used if not specified" ) parser.add_argument( "--price-feed-expiry", type=int, default=120, help="Maximum age of non-Tub price feed (in seconds, default: 120)" ) parser.add_argument("--order-age", type=int, required=True, help="Age of created orders (in blocks)") parser.add_argument( "--order-expiry-threshold", type=int, default=0, help= "Remaining order age (in blocks) at which order is considered already expired, which" " means the keeper will send a new replacement order slightly ahead" ) parser.add_argument( "--order-no-cancel-threshold", type=int, default=0, help= "Remaining order age (in blocks) below which keeper does not try to cancel orders," " assuming that they will probably expire before the cancel transaction gets mined" ) parser.add_argument( "--eth-reserve", type=float, required=True, help= "Amount of ETH which will never be deposited so the keeper can cover gas" ) parser.add_argument( "--min-eth-balance", type=float, default=0, help= "Minimum ETH balance below which keeper with either terminate or not start at all" ) parser.add_argument( "--min-eth-deposit", type=float, required=True, help= "Minimum amount of ETH that can be deposited in one transaction") parser.add_argument( "--min-sai-deposit", type=float, required=True, help= "Minimum amount of SAI that can be deposited in one transaction") parser.add_argument( '--cancel-on-shutdown', dest='cancel_on_shutdown', action='store_true', help= "Whether should cancel all open orders on EtherDelta on keeper shutdown" ) parser.add_argument( '--withdraw-on-shutdown', dest='withdraw_on_shutdown', action='store_true', help= "Whether should withdraw all tokens from EtherDelta on keeper shutdown" ) parser.add_argument("--gas-price", type=int, default=0, help="Gas price (in Wei)") parser.add_argument( "--gas-price-increase", type=int, help="Gas price increase (in Wei) if no confirmation within" " `--gas-price-increase-every` seconds") parser.add_argument( "--gas-price-increase-every", type=int, default=120, help="Gas price increase frequency (in seconds, default: 120)") parser.add_argument("--gas-price-max", type=int, help="Maximum gas price (in Wei)") parser.add_argument("--gas-price-file", type=str, help="Gas price configuration file") parser.add_argument( "--smart-gas-price", dest='smart_gas_price', action='store_true', help= "Use smart gas pricing strategy, based on the ethgasstation.info feed" ) parser.add_argument("--debug", dest='debug', action='store_true', help="Enable debug output") parser.set_defaults(cancel_on_shutdown=False, withdraw_on_shutdown=False) self.arguments = parser.parse_args(args) self.web3 = kwargs['web3'] if 'web3' in kwargs else Web3( HTTPProvider( endpoint_uri= f"http://{self.arguments.rpc_host}:{self.arguments.rpc_port}", request_kwargs={"timeout": self.arguments.rpc_timeout})) self.web3.eth.defaultAccount = self.arguments.eth_from self.our_address = Address(self.arguments.eth_from) self.tub = Tub(web3=self.web3, address=Address(self.arguments.tub_address)) self.vox = Vox(web3=self.web3, address=self.tub.vox()) self.sai = ERC20Token(web3=self.web3, address=self.tub.sai()) self.gem = ERC20Token(web3=self.web3, address=self.tub.gem()) logging.basicConfig( format='%(asctime)-15s %(levelname)-8s %(message)s', level=(logging.DEBUG if self.arguments.debug else logging.INFO)) logging.getLogger('urllib3.connectionpool').setLevel(logging.INFO) logging.getLogger('requests.packages.urllib3.connectionpool').setLevel( logging.INFO) self.bands_config = ReloadableConfig(self.arguments.config) self.eth_reserve = Wad.from_number(self.arguments.eth_reserve) self.min_eth_balance = Wad.from_number(self.arguments.min_eth_balance) self.min_eth_deposit = Wad.from_number(self.arguments.min_eth_deposit) self.min_sai_deposit = Wad.from_number(self.arguments.min_sai_deposit) self.gas_price = GasPriceFactory().create_gas_price(self.arguments) self.price_feed = PriceFeedFactory().create_price_feed( self.arguments.price_feed, self.arguments.price_feed_expiry, self.tub, self.vox) if self.eth_reserve <= self.min_eth_balance: raise Exception( "--eth-reserve must be higher than --min-eth-balance") assert (self.arguments.order_expiry_threshold >= 0) assert (self.arguments.order_no_cancel_threshold >= self.arguments.order_expiry_threshold) self.etherdelta = EtherDelta(web3=self.web3, address=Address( self.arguments.etherdelta_address)) self.etherdelta_api = EtherDeltaApi( client_tool_directory="lib/pymaker/utils/etherdelta-client", client_tool_command="node main.js", api_server=self.arguments.etherdelta_socket, number_of_attempts=self.arguments.etherdelta_number_of_attempts, retry_interval=self.arguments.etherdelta_retry_interval, timeout=self.arguments.etherdelta_timeout) self.our_orders = list() def main(self): with Lifecycle(self.web3) as lifecycle: lifecycle.initial_delay(10) lifecycle.on_startup(self.startup) lifecycle.on_block(self.synchronize_orders) lifecycle.on_shutdown(self.shutdown) def startup(self): self.approve() @retry(delay=5, logger=logger) def shutdown(self): if self.arguments.cancel_on_shutdown: self.cancel_all_orders() if self.arguments.withdraw_on_shutdown: self.withdraw_everything() def approve(self): """Approve EtherDelta to access our tokens, so we can deposit them with the exchange""" token_addresses = filter( lambda address: address != EtherDelta.ETH_TOKEN, [self.token_sell(), self.token_buy()]) tokens = list( map(lambda address: ERC20Token(web3=self.web3, address=address), token_addresses)) self.etherdelta.approve(tokens, directly(gas_price=self.gas_price)) def place_order(self, order: Order): self.our_orders.append(order) self.etherdelta_api.publish_order(order) def price(self) -> Wad: return self.price_feed.get_price() def token_sell(self) -> Address: return EtherDelta.ETH_TOKEN def token_buy(self) -> Address: return self.sai.address def our_balance(self, token: Address) -> Wad: if token == EtherDelta.ETH_TOKEN: return self.etherdelta.balance_of(self.our_address) else: return self.etherdelta.balance_of_token(token, self.our_address) def our_sell_orders(self): return list( filter( lambda order: order.buy_token == self.token_buy() and order. pay_token == self.token_sell(), self.our_orders)) def our_buy_orders(self): return list( filter( lambda order: order.buy_token == self.token_sell() and order. pay_token == self.token_buy(), self.our_orders)) def synchronize_orders(self): # If keeper balance is below `--min-eth-balance`, cancel all orders but do not terminate # the keeper, keep processing blocks as the moment the keeper gets a top-up it should # resume activity straight away, without the need to restart it. if eth_balance(self.web3, self.our_address) < self.min_eth_balance: self.logger.warning( "Keeper ETH balance below minimum. Cancelling all orders.") self.cancel_all_orders() return bands = Bands(self.bands_config) block_number = self.web3.eth.blockNumber target_price = self.price() # If the is no target price feed, cancel all orders but do not terminate the keeper. # The moment the price feed comes back, the keeper will resume placing orders. if target_price is None: self.logger.warning( "Cancelling all orders as no price feed available.") self.cancel_all_orders() return # Remove expired orders from the local order list self.remove_expired_orders(block_number) # Cancel orders cancellable_orders = bands.cancellable_orders(self.our_buy_orders(), self.our_sell_orders(), target_price) if len(cancellable_orders) > 0: self.cancel_orders(cancellable_orders, block_number) return # Place new orders self.top_up_bands(bands.buy_bands, bands.sell_bands, target_price) @staticmethod def is_order_age_above_threshold(order: Order, block_number: int, threshold: int): return block_number >= order.expires - threshold # we do >= 0, which makes us effectively detect an order # as expired one block earlier than the contract, but # this is desirable from the keeper point of view def is_expired(self, order: Order, block_number: int): return self.is_order_age_above_threshold( order, block_number, self.arguments.order_expiry_threshold) def is_non_cancellable(self, order: Order, block_number: int): return self.is_order_age_above_threshold( order, block_number, self.arguments.order_no_cancel_threshold) def remove_expired_orders(self, block_number: int): self.our_orders = list( filter(lambda order: not self.is_expired(order, block_number), self.our_orders)) def cancel_orders(self, orders: Iterable, block_number: int): """Cancel orders asynchronously.""" cancellable_orders = list( filter( lambda order: not self.is_non_cancellable(order, block_number), orders)) synchronize([ self.etherdelta.cancel_order(order).transact_async( gas_price=self.gas_price) for order in cancellable_orders ]) self.our_orders = list(set(self.our_orders) - set(cancellable_orders)) def cancel_all_orders(self): """Cancel all our orders.""" self.cancel_orders(self.our_orders, self.web3.eth.blockNumber) def withdraw_everything(self): eth_balance = self.etherdelta.balance_of(self.our_address) if eth_balance > Wad(0): self.etherdelta.withdraw(eth_balance).transact( gas_price=self.gas_price) sai_balance = self.etherdelta.balance_of_token(self.sai.address, self.our_address) if sai_balance > Wad(0): self.etherdelta.withdraw_token(self.sai.address, sai_balance).transact() def top_up_bands(self, buy_bands: list, sell_bands: list, target_price: Wad): """Create new buy and sell orders in all send and buy bands if necessary.""" self.top_up_buy_bands(buy_bands, target_price) self.top_up_sell_bands(sell_bands, target_price) def top_up_sell_bands(self, sell_bands: list, target_price: Wad): """Ensure our sell engagement is not below minimum in all sell bands. Place new orders if necessary.""" our_balance = self.our_balance(self.token_sell()) for band in sell_bands: orders = [ order for order in self.our_sell_orders() if band.includes(order, target_price) ] total_amount = self.total_amount(orders) if total_amount < band.min_amount: if self.deposit_for_sell_order_if_needed(band.avg_amount - total_amount): return price = band.avg_price(target_price) pay_amount = self.fix_amount( Wad.min( band.avg_amount - total_amount, our_balance - self.total_amount(self.our_sell_orders()))) buy_amount = self.fix_amount(pay_amount * price) if (pay_amount >= band.dust_cutoff) and ( pay_amount > Wad(0)) and (buy_amount > Wad(0)): self.logger.debug( f"Using price {price} for new sell order") order = self.etherdelta.create_order( pay_token=self.token_sell(), pay_amount=pay_amount, buy_token=self.token_buy(), buy_amount=buy_amount, expires=self.web3.eth.blockNumber + self.arguments.order_age) self.place_order(order) def top_up_buy_bands(self, buy_bands: list, target_price: Wad): """Ensure our buy engagement is not below minimum in all buy bands. Place new orders if necessary.""" our_balance = self.our_balance(self.token_buy()) for band in buy_bands: orders = [ order for order in self.our_buy_orders() if band.includes(order, target_price) ] total_amount = self.total_amount(orders) if total_amount < band.min_amount: if self.deposit_for_buy_order_if_needed(band.avg_amount - total_amount): return price = band.avg_price(target_price) pay_amount = self.fix_amount( Wad.min( band.avg_amount - total_amount, our_balance - self.total_amount(self.our_buy_orders()))) buy_amount = self.fix_amount(pay_amount / price) if (pay_amount >= band.dust_cutoff) and ( pay_amount > Wad(0)) and (buy_amount > Wad(0)): self.logger.debug(f"Using price {price} for new buy order") order = self.etherdelta.create_order( pay_token=self.token_buy(), pay_amount=pay_amount, buy_token=self.token_sell(), buy_amount=buy_amount, expires=self.web3.eth.blockNumber + self.arguments.order_age) self.place_order(order) def depositable_balance(self, token: Address) -> Wad: if token == EtherDelta.ETH_TOKEN: return Wad.max( eth_balance(self.web3, self.our_address) - self.eth_reserve, Wad(0)) else: return ERC20Token(web3=self.web3, address=token).balance_of(self.our_address) def deposit_for_sell_order_if_needed(self, desired_order_pay_amount: Wad): if self.our_balance(self.token_sell()) < desired_order_pay_amount: return self.deposit_for_sell_order() else: return False def deposit_for_sell_order(self): depositable_eth = self.depositable_balance(self.token_sell()) if depositable_eth > self.min_eth_deposit: return self.etherdelta.deposit(depositable_eth).transact( gas_price=self.gas_price).successful else: return False def deposit_for_buy_order_if_needed(self, desired_order_pay_amount: Wad): if self.our_balance(self.token_buy()) < desired_order_pay_amount: return self.deposit_for_buy_order() else: return False def deposit_for_buy_order(self): depositable_sai = self.depositable_balance(self.token_buy()) if depositable_sai > self.min_sai_deposit: return self.etherdelta.deposit_token( self.sai.address, depositable_sai).transact(gas_price=self.gas_price).successful else: return False def total_amount(self, orders): return reduce(operator.add, map(lambda order: order.remaining_sell_amount, orders), Wad(0)) @staticmethod def fix_amount(amount: Wad) -> Wad: # for some reason, the EtherDelta backend rejects offchain orders with some amounts # for example, the following order: # self.etherdelta.place_order_offchain(self.sai.address, Wad(93033469375510291122), # EtherDelta.ETH_TOKEN, Wad(400000000000000000), # self.web3.eth.blockNumber + 50) # will get placed correctly, but if we substitute 93033469375510291122 for 93033469375510237227 # the backend will not accept it. this is 100% reproductible with above amounts, # although I wasn't able to figure out the actual reason # # what I have noticed is that rounding the amount seems to help, # so this is what this particular method does return Wad(int(amount.value / 10**9) * 10**9)
class RadarRelayMarketMakerKeeper: """Keeper acting as a market maker on RadarRelay, on the WETH/SAI pair.""" logger = logging.getLogger() def __init__(self, args: list, **kwargs): parser = argparse.ArgumentParser(prog='radarrelay-market-maker-keeper') parser.add_argument("--rpc-host", type=str, default="localhost", help="JSON-RPC host (default: `localhost')") parser.add_argument("--rpc-port", type=int, default=8545, help="JSON-RPC port (default: `8545')") parser.add_argument("--rpc-timeout", type=int, default=10, help="JSON-RPC timeout (in seconds, default: 10)") parser.add_argument( "--eth-from", type=str, required=True, help="Ethereum account from which to send transactions") parser.add_argument("--tub-address", type=str, required=True, help="Ethereum address of the Tub contract") parser.add_argument( "--exchange-address", type=str, required=True, help="Ethereum address of the 0x Exchange contract") parser.add_argument("--weth-address", type=str, required=True, help="Ethereum address of the WETH token") parser.add_argument("--relayer-api-server", type=str, required=True, help="Address of the 0x Relayer API") parser.add_argument("--config", type=str, required=True, help="Buy/sell bands configuration file") parser.add_argument( "--price-feed", type=str, help= "Source of price feed. Tub price feed will be used if not specified" ) parser.add_argument( "--price-feed-expiry", type=int, default=120, help="Maximum age of non-Tub price feed (in seconds, default: 120)" ) parser.add_argument( "--order-expiry", type=int, required=True, help="Expiration time of created orders (in seconds)") parser.add_argument( "--order-expiry-threshold", type=int, default=0, help= "Order expiration time at which order is considered already expired (in seconds)" ) parser.add_argument( "--min-eth-balance", type=float, default=0, help= "Minimum ETH balance below which keeper with either terminate or not start at all" ) parser.add_argument( '--cancel-on-shutdown', dest='cancel_on_shutdown', action='store_true', help= "Whether should cancel all open orders on RadarRelay on keeper shutdown" ) parser.add_argument("--gas-price", type=int, default=0, help="Gas price (in Wei)") parser.add_argument( "--gas-price-increase", type=int, help="Gas price increase (in Wei) if no confirmation within" " `--gas-price-increase-every` seconds") parser.add_argument( "--gas-price-increase-every", type=int, default=120, help="Gas price increase frequency (in seconds, default: 120)") parser.add_argument("--gas-price-max", type=int, help="Maximum gas price (in Wei)") parser.add_argument("--gas-price-file", type=str, help="Gas price configuration file") parser.add_argument( "--smart-gas-price", dest='smart_gas_price', action='store_true', help= "Use smart gas pricing strategy, based on the ethgasstation.info feed" ) parser.add_argument("--debug", dest='debug', action='store_true', help="Enable debug output") self.arguments = parser.parse_args(args) self.web3 = kwargs['web3'] if 'web3' in kwargs else Web3( HTTPProvider( endpoint_uri= f"http://{self.arguments.rpc_host}:{self.arguments.rpc_port}", request_kwargs={"timeout": self.arguments.rpc_timeout})) self.web3.eth.defaultAccount = self.arguments.eth_from self.our_address = Address(self.arguments.eth_from) self.tub = Tub(web3=self.web3, address=Address(self.arguments.tub_address)) self.vox = Vox(web3=self.web3, address=self.tub.vox()) self.sai = ERC20Token(web3=self.web3, address=self.tub.sai()) self.ether_token = ERC20Token(web3=self.web3, address=Address( self.arguments.weth_address)) logging.basicConfig( format='%(asctime)-15s %(levelname)-8s %(message)s', level=(logging.DEBUG if self.arguments.debug else logging.INFO)) logging.getLogger('urllib3.connectionpool').setLevel(logging.INFO) logging.getLogger('requests.packages.urllib3.connectionpool').setLevel( logging.INFO) self.min_eth_balance = Wad.from_number(self.arguments.min_eth_balance) self.bands_config = ReloadableConfig(self.arguments.config) self.gas_price = GasPriceFactory().create_gas_price(self.arguments) self.price_feed = PriceFeedFactory().create_price_feed( self.arguments.price_feed, self.arguments.price_feed_expiry, self.tub, self.vox) self.radar_relay = ZrxExchange(web3=self.web3, address=Address( self.arguments.exchange_address)) self.radar_relay_api = ZrxRelayerApi( exchange=self.radar_relay, api_server=self.arguments.relayer_api_server) def main(self): with Lifecycle(self.web3) as lifecycle: lifecycle.initial_delay(10) lifecycle.on_startup(self.startup) lifecycle.every(15, self.synchronize_orders) lifecycle.on_shutdown(self.shutdown) def startup(self): self.approve() @retry(delay=5, logger=logger) def shutdown(self): if self.arguments.cancel_on_shutdown: self.cancel_orders(self.our_orders()) def approve(self): """Approve 0x to access our tokens, so we can sell it on the exchange.""" self.radar_relay.approve( [self.token_sell(), self.token_buy()], directly(gas_price=self.gas_price)) def price(self) -> Wad: return self.price_feed.get_price() def token_sell(self) -> ERC20Token: return self.ether_token def token_buy(self) -> ERC20Token: return self.sai def our_balance(self, token: ERC20Token) -> Wad: return token.balance_of(self.our_address) def our_orders(self) -> list: our_orders = self.radar_relay_api.get_orders_by_maker(self.our_address) current_timestamp = int(time.time()) our_orders = list( filter( lambda order: order.expiration > current_timestamp - self. arguments.order_expiry_threshold, our_orders)) our_orders = list( filter( lambda order: self.radar_relay.get_unavailable_buy_amount( order) < order.buy_amount, our_orders)) return our_orders def our_sell_orders(self, our_orders: list) -> list: return list( filter( lambda order: order.buy_token == self.token_buy().address and order.pay_token == self.token_sell().address, our_orders)) def our_buy_orders(self, our_orders: list) -> list: return list( filter( lambda order: order.buy_token == self.token_sell().address and order.pay_token == self.token_buy().address, our_orders)) def synchronize_orders(self): """Update our positions in the order book to reflect keeper parameters.""" if eth_balance(self.web3, self.our_address) < self.min_eth_balance: self.logger.warning( "Keeper ETH balance below minimum. Cancelling all orders.") self.cancel_orders(self.our_orders()) return bands = Bands(self.bands_config) our_orders = self.our_orders() target_price = self.price() if target_price is None: self.logger.warning( "Cancelling all orders as no price feed available.") self.cancel_orders(our_orders) return # Cancel orders cancellable_orders = bands.cancellable_orders( our_buy_orders=self.our_buy_orders(our_orders), our_sell_orders=self.our_sell_orders(our_orders), target_price=target_price) if len(cancellable_orders) > 0: self.cancel_orders(cancellable_orders) return # Place new orders self.create_orders( bands.new_orders( our_buy_orders=self.our_buy_orders(our_orders), our_sell_orders=self.our_sell_orders(our_orders), our_buy_balance=self.our_balance(self.token_buy()), our_sell_balance=self.our_balance(self.token_sell()), target_price=target_price)) def cancel_orders(self, orders): """Cancel orders asynchronously.""" synchronize([ self.radar_relay.cancel_order(order).transact_async( gas_price=self.gas_price) for order in orders ]) def create_orders(self, orders): """Create and submit orders synchronously.""" for order in orders: pay_token = self.token_sell() if order.is_sell else self.token_buy( ) buy_token = self.token_buy() if order.is_sell else self.token_sell( ) order = self.radar_relay.create_order(pay_token=pay_token.address, pay_amount=order.pay_amount, buy_token=buy_token.address, buy_amount=order.buy_amount, expiration=int(time.time()) + self.arguments.order_expiry) order = self.radar_relay_api.calculate_fees(order) order = self.radar_relay.sign_order(order) self.radar_relay_api.submit_order(order)
class IdexMarketMakerKeeper: """Keeper acting as a market maker on IDEX, on the ETH/SAI pair.""" logger = logging.getLogger() def __init__(self, args: list, **kwargs): parser = argparse.ArgumentParser(prog='idex-market-maker-keeper') parser.add_argument("--rpc-host", type=str, default="localhost", help="JSON-RPC host (default: `localhost')") parser.add_argument("--rpc-port", type=int, default=8545, help="JSON-RPC port (default: `8545')") parser.add_argument("--rpc-timeout", type=int, default=10, help="JSON-RPC timeout (in seconds, default: 10)") parser.add_argument("--eth-from", type=str, required=True, help="Ethereum account from which to send transactions") parser.add_argument("--tub-address", type=str, required=True, help="Ethereum address of the Tub contract") parser.add_argument("--idex-address", type=str, required=True, help="Ethereum address of the IDEX contract") parser.add_argument("--idex-api-server", type=str, default='https://api.idex.market', help="Address of the IDEX API server (default: 'https://api.idex.market')") parser.add_argument("--idex-timeout", type=float, default=9.5, help="Timeout for accessing the IDEX API (in seconds, default: 9.5)") parser.add_argument("--config", type=str, required=True, help="Bands configuration file") parser.add_argument("--price-feed", type=str, required=True, help="Source of price feed") parser.add_argument("--price-feed-expiry", type=int, default=120, help="Maximum age of the price feed (in seconds, default: 120)") parser.add_argument("--eth-reserve", type=float, required=True, help="Amount of ETH which will never be deposited so the keeper can cover gas") parser.add_argument("--min-eth-balance", type=float, default=0, help="Minimum ETH balance below which keeper will cease operation") parser.add_argument("--min-eth-deposit", type=float, required=True, help="Minimum amount of ETH that can be deposited in one transaction") parser.add_argument("--min-sai-deposit", type=float, required=True, help="Minimum amount of SAI that can be deposited in one transaction") parser.add_argument("--gas-price", type=int, default=0, help="Gas price (in Wei)") parser.add_argument("--smart-gas-price", dest='smart_gas_price', action='store_true', help="Use smart gas pricing strategy, based on the ethgasstation.info feed") parser.add_argument("--debug", dest='debug', action='store_true', help="Enable debug output") parser.set_defaults(cancel_on_shutdown=False, withdraw_on_shutdown=False) self.arguments = parser.parse_args(args) setup_logging(self.arguments) self.web3 = kwargs['web3'] if 'web3' in kwargs else Web3(HTTPProvider(endpoint_uri=f"http://{self.arguments.rpc_host}:{self.arguments.rpc_port}", request_kwargs={"timeout": self.arguments.rpc_timeout})) self.web3.eth.defaultAccount = self.arguments.eth_from self.our_address = Address(self.arguments.eth_from) self.tub = Tub(web3=self.web3, address=Address(self.arguments.tub_address)) self.sai = ERC20Token(web3=self.web3, address=self.tub.sai()) self.gem = ERC20Token(web3=self.web3, address=self.tub.gem()) self.bands_config = ReloadableConfig(self.arguments.config) self.eth_reserve = Wad.from_number(self.arguments.eth_reserve) self.min_eth_balance = Wad.from_number(self.arguments.min_eth_balance) self.min_eth_deposit = Wad.from_number(self.arguments.min_eth_deposit) self.min_sai_deposit = Wad.from_number(self.arguments.min_sai_deposit) self.gas_price = GasPriceFactory().create_gas_price(self.arguments) self.price_feed = PriceFeedFactory().create_price_feed(self.arguments.price_feed, self.arguments.price_feed_expiry, self.tub) if self.eth_reserve <= self.min_eth_balance: raise Exception("--eth-reserve must be higher than --min-eth-balance") self.history = History() self.idex = IDEX(self.web3, Address(self.arguments.idex_address)) self.idex_api = IDEXApi(self.idex, self.arguments.idex_api_server, self.arguments.idex_timeout) def main(self): with Lifecycle(self.web3) as lifecycle: lifecycle.initial_delay(10) lifecycle.on_startup(self.startup) lifecycle.on_block(self.synchronize_orders) lifecycle.on_shutdown(self.shutdown) def startup(self): self.approve() @retry(delay=5, logger=logger) def shutdown(self): self.cancel_all_orders() def approve(self): """Approve IEEX to access our tokens, so we can deposit them with the exchange""" token_addresses = filter(lambda address: address != IDEX.ETH_TOKEN, [self.token_sell(), self.token_buy()]) tokens = list(map(lambda address: ERC20Token(web3=self.web3, address=address), token_addresses)) self.idex.approve(tokens, directly(gas_price=self.gas_price)) def pair(self): # IDEX is inconsistent here. They call the pair `DAI_ETH`, but in reality all prices are # calculated like it was an `ETH/DAI` pair. return 'DAI_ETH' def token_sell(self) -> Address: return IDEX.ETH_TOKEN def token_buy(self) -> Address: return self.sai.address def our_balances(self): return self.idex_api.get_balances() def our_available_balance(self, our_balances, token: Address) -> Wad: if token == EtherDelta.ETH_TOKEN: try: return Wad.from_number(our_balances['ETH']['available']) except KeyError: return Wad(0) elif token == self.sai.address: try: return Wad.from_number(our_balances['DAI']['available']) except KeyError: return Wad(0) else: raise Exception("Unknown token") def our_orders(self) -> list: return self.idex_api.get_orders(self.pair()) def our_sell_orders(self, our_orders: list): return list(filter(lambda order: order.is_sell, our_orders)) def our_buy_orders(self, our_orders: list): return list(filter(lambda order: not order.is_sell, our_orders)) def synchronize_orders(self): # If keeper balance is below `--min-eth-balance`, cancel all orders but do not terminate # the keeper, keep processing blocks as the moment the keeper gets a top-up it should # resume activity straight away, without the need to restart it. if eth_balance(self.web3, self.our_address) < self.min_eth_balance: self.logger.warning(f"Keeper ETH balance below minimum, cancelling all orders.") self.cancel_all_orders() return bands = Bands(self.bands_config, self.history) our_balances = self.our_balances() our_orders = self.our_orders() target_price = self.price_feed.get_price() # If the is no target price feed, cancel all orders but do not terminate the keeper. # The moment the price feed comes back, the keeper will resume placing orders. if target_price is None: self.logger.warning("Cancelling all orders as no price feed available.") self.cancel_all_orders() return # Cancel orders cancellable_orders = bands.cancellable_orders(our_buy_orders=self.our_buy_orders(our_orders), our_sell_orders=self.our_sell_orders(our_orders), target_price=target_price) if len(cancellable_orders) > 0: self.cancel_orders(cancellable_orders) return # If we detect that our total balance reported by the API is not equal to the # total balance reported by the Ethereum contract, it probably means that some # deposits are still pending being credited to our account. In this case # we also do not create any new orders, but at the same time existing orders # can still be cancelled. if not self.balances_match(our_balances): self.logger.info("Balances do not match, probably deposits are in progress, waiting.") return # Evaluate if we need to create new orders, and how much do we need to deposit new_orders, missing_buy_amount, missing_sell_amount = bands.new_orders(our_buy_orders=self.our_buy_orders(our_orders), our_sell_orders=self.our_sell_orders(our_orders), our_buy_balance=self.our_available_balance(our_balances, self.token_buy()), our_sell_balance=self.our_available_balance(our_balances, self.token_sell()), target_price=target_price) # If deposited amount too low for placing buy orders, try to deposit. # If deposited amount too low for placing sell orders, try to deposit. made_deposit = False if missing_buy_amount > Wad(0): if self.deposit_for_buy_order(missing_buy_amount): made_deposit = True if missing_sell_amount > Wad(0): if missing_sell_amount > Wad(0): if self.deposit_for_sell_order(missing_sell_amount): made_deposit = True # If we managed to deposit something, do not do anything so we can reevaluate new orders to be placed. # Otherwise, place new orders. if not made_deposit: self.place_orders(new_orders) def cancel_orders(self, orders: list): for order in orders: self.idex_api.cancel_order(order) def cancel_all_orders(self): self.cancel_orders(self.our_orders()) def place_orders(self, new_orders): for new_order in new_orders: if new_order.is_sell: self.idex_api.place_order(pay_token=self.token_sell(), pay_amount=new_order.pay_amount, buy_token=self.token_buy(), buy_amount=new_order.buy_amount) else: self.idex_api.place_order(pay_token=self.token_buy(), pay_amount=new_order.pay_amount, buy_token=self.token_sell(), buy_amount=new_order.buy_amount) def deposit_for_sell_order(self, missing_sell_amount: Wad): # We always want to deposit at least `min_eth_deposit`. If `missing_sell_amount` is less # than that, we deposit `min_eth_deposit` anyway. if Wad(0) < missing_sell_amount < self.min_eth_deposit: missing_sell_amount = self.min_eth_deposit # We can never deposit more than our available ETH balance minus `eth_reserve` (reserve for gas). depositable_eth = Wad.max(eth_balance(self.web3, self.our_address) - self.eth_reserve, Wad(0)) missing_sell_amount = Wad.min(missing_sell_amount, depositable_eth) # If we still can deposit something, and it's at least `min_eth_deposit`, then we do deposit. if missing_sell_amount > Wad(0) and missing_sell_amount >= self.min_eth_deposit: receipt = self.idex.deposit(missing_sell_amount).transact(gas_price=self.gas_price) return receipt is not None and receipt.successful else: return False def deposit_for_buy_order(self, missing_buy_amount: Wad): # We always want to deposit at least `min_sai_deposit`. If `missing_buy_amount` is less # than that, we deposit `min_sai_deposit` anyway. if Wad(0) < missing_buy_amount < self.min_sai_deposit: missing_buy_amount = self.min_sai_deposit # We can never deposit more than our available SAI balance. depositable_sai = self.sai.balance_of(self.our_address) missing_buy_amount = Wad.min(missing_buy_amount, depositable_sai) # If we still can deposit something, and it's at least `min_sai_deposit`, then we do deposit. if missing_buy_amount > Wad(0) and missing_buy_amount >= self.min_sai_deposit: receipt = self.idex.deposit_token(self.sai.address, missing_buy_amount).transact(gas_price=self.gas_price) return receipt is not None and receipt.successful else: return False def balances_match(self, our_balances) -> bool: try: eth_available = Wad.from_number(our_balances['ETH']['available']) except KeyError: eth_available = Wad(0) try: eth_on_orders = Wad.from_number(our_balances['ETH']['onOrders']) except KeyError: eth_on_orders = Wad(0) try: dai_available = Wad.from_number(our_balances['DAI']['available']) except KeyError: dai_available = Wad(0) try: dai_on_orders = Wad.from_number(our_balances['DAI']['onOrders']) except KeyError: dai_on_orders = Wad(0) return self.idex.balance_of(self.our_address) == eth_available + eth_on_orders and \ self.idex.balance_of_token(self.sai.address, self.our_address) == dai_available + dai_on_orders
class GateIOMarketMakerKeeper: """Keeper acting as a market maker on Gate.io.""" logger = logging.getLogger() def __init__(self, args: list, **kwargs): parser = argparse.ArgumentParser(prog='gateio-market-maker-keeper') parser.add_argument( "--gateio-api-server", type=str, default="https://data.gate.io", help= "Address of the Gate.io API server (default: 'https://data.gate.io')" ) parser.add_argument("--gateio-api-key", type=str, required=True, help="API key for the Gate.io API") parser.add_argument("--gateio-secret-key", type=str, required=True, help="Secret key for the Gate.io API") parser.add_argument( "--gateio-timeout", type=float, default=9.5, help= "Timeout for accessing the Gate.io API (in seconds, default: 9.5)") parser.add_argument( "--pair", type=str, required=True, help="Token pair (sell/buy) on which the keeper will operate") parser.add_argument("--config", type=str, required=True, help="Bands configuration file") parser.add_argument("--price-feed", type=str, required=True, help="Source of price feed") parser.add_argument( "--price-feed-expiry", type=int, default=120, help="Maximum age of the price feed (in seconds, default: 120)") parser.add_argument("--debug", dest='debug', action='store_true', help="Enable debug output") self.arguments = parser.parse_args(args) setup_logging(self.arguments) self.bands_config = ReloadableConfig(self.arguments.config) self.price_feed = PriceFeedFactory().create_price_feed( self.arguments.price_feed, self.arguments.price_feed_expiry) self.gateio_api = GateIOApi( api_server=self.arguments.gateio_api_server, api_key=self.arguments.gateio_api_key, secret_key=self.arguments.gateio_secret_key, timeout=self.arguments.gateio_timeout) self._last_order_creation = 0 def main(self): with Lifecycle() as lifecycle: lifecycle.on_startup(self.startup) lifecycle.every(10, self.synchronize_orders) lifecycle.on_shutdown(self.shutdown) def startup(self): self.our_orders() self.our_balances() self.logger.info(f"Gate.io API key seems to be valid") self.logger.info( f"Keeper configured to work on the '{self.pair()}' pair") def shutdown(self): self.gateio_api.cancel_all_orders(self.pair()) def pair(self): return self.arguments.pair.lower() def token_sell(self) -> str: return self.arguments.pair.split('_')[0].upper() def token_buy(self) -> str: return self.arguments.pair.split('_')[1].upper() def our_balances(self) -> dict: return self.gateio_api.get_balances() def our_available_balance(self, our_balances: dict, token: str) -> Wad: try: return Wad.from_number(our_balances['available'][token]) except KeyError: return Wad(0) def our_orders(self) -> list: return self.gateio_api.get_orders(self.pair()) def our_sell_orders(self, our_orders: list) -> list: return list(filter(lambda order: order.is_sell, our_orders)) def our_buy_orders(self, our_orders: list) -> list: return list(filter(lambda order: not order.is_sell, our_orders)) def synchronize_orders(self): bands = Bands(self.bands_config) our_balances = self.our_balances() our_orders = self.our_orders() target_price = self.price_feed.get_price() if target_price is None: self.logger.warning( "Cancelling all orders as no price feed available.") self.cancel_orders(our_orders) return # Cancel orders cancellable_orders = bands.cancellable_orders( our_buy_orders=self.our_buy_orders(our_orders), our_sell_orders=self.our_sell_orders(our_orders), target_price=target_price) if len(cancellable_orders) > 0: self.cancel_orders(cancellable_orders) return # Place new orders new_orders = bands.new_orders( our_buy_orders=self.our_buy_orders(our_orders), our_sell_orders=self.our_sell_orders(our_orders), our_buy_balance=self.our_available_balance(our_balances, self.token_buy()), our_sell_balance=self.our_available_balance( our_balances, self.token_sell()), target_price=target_price)[0] if len(new_orders) > 0: if self.can_create_orders(): self.create_orders(new_orders) self.register_order_creation() else: self.logger.info( "Too little time elapsed from last order creation, waiting..." ) # Unfortunately the gate.io API does not immediately reflect the fact that our orders have # been placed. In order to avoid placing orders twice we explicitly wait some time here. def can_create_orders(self) -> bool: return time.time() - self._last_order_creation > 15 def register_order_creation(self): self._last_order_creation = time.time() def cancel_orders(self, orders: List[Order]): for order in orders: self.gateio_api.cancel_order(self.pair(), order.order_id) def create_orders(self, orders: List[NewOrder]): for order in orders: amount = order.pay_amount if order.is_sell else order.buy_amount self.gateio_api.place_order(self.pair(), order.is_sell, order.price, amount)
class ZrxMarketMakerKeeper: """Keeper acting as a market maker on any 0x exchange implementing the Standard 0x Relayer API V0.""" logger = logging.getLogger() def __init__(self, args: list, **kwargs): parser = argparse.ArgumentParser(prog='0x-market-maker-keeper') parser.add_argument("--rpc-host", type=str, default="localhost", help="JSON-RPC host (default: `localhost')") parser.add_argument("--rpc-port", type=int, default=8545, help="JSON-RPC port (default: `8545')") parser.add_argument("--rpc-timeout", type=int, default=10, help="JSON-RPC timeout (in seconds, default: 10)") parser.add_argument("--eth-from", type=str, required=True, help="Ethereum account from which to send transactions") parser.add_argument("--exchange-address", type=str, required=True, help="Ethereum address of the 0x Exchange contract") parser.add_argument("--relayer-api-server", type=str, required=True, help="Address of the 0x Relayer API") parser.add_argument("--relayer-per-page", type=int, default=100, help="Number of orders to fetch per one page from the 0x Relayer API (default: 100)") parser.add_argument("--buy-token-address", type=str, required=True, help="Ethereum address of the buy token") parser.add_argument("--sell-token-address", type=str, required=True, help="Ethereum address of the sell token") parser.add_argument("--config", type=str, required=True, help="Bands configuration file") parser.add_argument("--price-feed", type=str, required=True, help="Source of price feed") parser.add_argument("--price-feed-expiry", type=int, default=120, help="Maximum age of the price feed (in seconds, default: 120)") parser.add_argument("--order-expiry", type=int, required=True, help="Expiration time of created orders (in seconds)") parser.add_argument("--order-expiry-threshold", type=int, default=0, help="How long before order expiration it is considered already expired (in seconds)") parser.add_argument("--min-eth-balance", type=float, default=0, help="Minimum ETH balance below which keeper will cease operation") parser.add_argument('--cancel-on-shutdown', dest='cancel_on_shutdown', action='store_true', help="Whether should cancel all open orders on keeper shutdown") parser.add_argument("--gas-price", type=int, default=0, help="Gas price (in Wei)") parser.add_argument("--smart-gas-price", dest='smart_gas_price', action='store_true', help="Use smart gas pricing strategy, based on the ethgasstation.info feed") parser.add_argument("--debug", dest='debug', action='store_true', help="Enable debug output") self.arguments = parser.parse_args(args) setup_logging(self.arguments) self.web3 = kwargs['web3'] if 'web3' in kwargs else Web3(HTTPProvider(endpoint_uri=f"http://{self.arguments.rpc_host}:{self.arguments.rpc_port}", request_kwargs={"timeout": self.arguments.rpc_timeout})) self.web3.eth.defaultAccount = self.arguments.eth_from self.our_address = Address(self.arguments.eth_from) self.token_buy = ERC20Token(web3=self.web3, address=Address(self.arguments.buy_token_address)) self.token_sell = ERC20Token(web3=self.web3, address=Address(self.arguments.sell_token_address)) self.min_eth_balance = Wad.from_number(self.arguments.min_eth_balance) self.bands_config = ReloadableConfig(self.arguments.config) self.gas_price = GasPriceFactory().create_gas_price(self.arguments) self.price_feed = PriceFeedFactory().create_price_feed(self.arguments.price_feed, self.arguments.price_feed_expiry) self.history = History() self.zrx_exchange = ZrxExchange(web3=self.web3, address=Address(self.arguments.exchange_address)) self.zrx_relayer_api = ZrxRelayerApi(exchange=self.zrx_exchange, api_server=self.arguments.relayer_api_server) self.placed_orders = [] def main(self): with Lifecycle(self.web3) as lifecycle: lifecycle.initial_delay(10) lifecycle.on_startup(self.startup) lifecycle.every(15, self.synchronize_orders) lifecycle.on_shutdown(self.shutdown) def startup(self): self.approve() @retry(delay=5, logger=logger) def shutdown(self): if self.arguments.cancel_on_shutdown: self.cancel_orders(self.our_orders()) def approve(self): """Approve 0x to access our tokens, so we can sell it on the exchange.""" self.zrx_exchange.approve([self.token_sell, self.token_buy], directly(gas_price=self.gas_price)) def our_total_balance(self, token: ERC20Token) -> Wad: return token.balance_of(self.our_address) def our_orders(self) -> list: api_orders = self.zrx_relayer_api.get_orders_by_maker(self.our_address, self.arguments.relayer_per_page) all_orders = list(set(self.placed_orders + api_orders)) return self.remove_old_orders(all_orders) def remove_old_orders(self, orders: list) -> list: current_timestamp = int(time.time()) orders = list(filter(lambda order: order.expiration > current_timestamp - self.arguments.order_expiry_threshold, orders)) orders = list(filter(lambda order: self.zrx_exchange.get_unavailable_buy_amount(order) < order.buy_amount, orders)) return orders def our_sell_orders(self, our_orders: list) -> list: return list(filter(lambda order: order.buy_token == self.token_buy.address and order.pay_token == self.token_sell.address, our_orders)) def our_buy_orders(self, our_orders: list) -> list: return list(filter(lambda order: order.buy_token == self.token_sell.address and order.pay_token == self.token_buy.address, our_orders)) def synchronize_orders(self): """Update our positions in the order book to reflect keeper parameters.""" if eth_balance(self.web3, self.our_address) < self.min_eth_balance: self.logger.warning("Keeper ETH balance below minimum. Cancelling all orders.") self.cancel_orders(self.our_orders()) return bands = Bands(self.bands_config, self.history) our_orders = self.our_orders() target_price = self.price_feed.get_price() if target_price is None: self.logger.warning("Cancelling all orders as no price feed available.") self.cancel_orders(our_orders) return # Cancel orders cancellable_orders = bands.cancellable_orders(our_buy_orders=self.our_buy_orders(our_orders), our_sell_orders=self.our_sell_orders(our_orders), target_price=target_price) if len(cancellable_orders) > 0: self.cancel_orders(cancellable_orders) return # Balances returned by `our_total_balance` still contain amounts "locked" # by currently open orders, so we need to explicitly subtract these amounts. our_buy_balance = self.our_total_balance(self.token_buy) - Bands.total_amount(self.our_buy_orders(our_orders)) our_sell_balance = self.our_total_balance(self.token_sell) - Bands.total_amount(self.our_sell_orders(our_orders)) # Place new orders self.place_orders(bands.new_orders(our_buy_orders=self.our_buy_orders(our_orders), our_sell_orders=self.our_sell_orders(our_orders), our_buy_balance=our_buy_balance, our_sell_balance=our_sell_balance, target_price=target_price)[0]) def cancel_orders(self, orders): synchronize([self.zrx_exchange.cancel_order(order).transact_async(gas_price=self.gas_price) for order in orders]) def place_orders(self, new_orders): for new_order in new_orders: pay_token = self.token_sell if new_order.is_sell else self.token_buy buy_token = self.token_buy if new_order.is_sell else self.token_sell zrx_order = self.zrx_exchange.create_order(pay_token=pay_token.address, pay_amount=new_order.pay_amount, buy_token=buy_token.address, buy_amount=new_order.buy_amount, expiration=int(time.time()) + self.arguments.order_expiry) zrx_order = self.zrx_relayer_api.calculate_fees(zrx_order) zrx_order = self.zrx_exchange.sign_order(zrx_order) if self.zrx_relayer_api.submit_order(zrx_order): self.placed_orders = self.remove_old_orders(self.placed_orders) self.placed_orders.append(zrx_order)
class OasisMarketMakerKeeper: """Keeper acting as a market maker on OasisDEX, on the W-ETH/SAI pair.""" logger = logging.getLogger() def __init__(self, args: list, **kwargs): parser = argparse.ArgumentParser(prog='oasis-market-maker-keeper') parser.add_argument("--rpc-host", type=str, default="localhost", help="JSON-RPC host (default: `localhost')") parser.add_argument("--rpc-port", type=int, default=8545, help="JSON-RPC port (default: `8545')") parser.add_argument("--rpc-timeout", type=int, default=10, help="JSON-RPC timeout (in seconds, default: 10)") parser.add_argument( "--eth-from", type=str, required=True, help="Ethereum account from which to send transactions") parser.add_argument("--tub-address", type=str, required=True, help="Ethereum address of the Tub contract") parser.add_argument("--oasis-address", type=str, required=True, help="Ethereum address of the OasisDEX contract") parser.add_argument("--config", type=str, required=True, help="Buy/sell bands configuration file") parser.add_argument( "--price-feed", type=str, help= "Source of price feed. Tub price feed will be used if not specified" ) parser.add_argument( "--price-feed-expiry", type=int, default=120, help="Maximum age of non-Tub price feed (in seconds, default: 120)" ) parser.add_argument( "--round-places", type=int, default=2, help="Number of decimal places to round order prices to (default=2)" ) parser.add_argument( "--min-eth-balance", type=float, default=0, help= "Minimum ETH balance below which keeper with either terminate or not start at all" ) parser.add_argument("--gas-price", type=int, default=0, help="Gas price (in Wei)") parser.add_argument( "--gas-price-increase", type=int, help="Gas price increase (in Wei) if no confirmation within" " `--gas-price-increase-every` seconds") parser.add_argument( "--gas-price-increase-every", type=int, default=120, help="Gas price increase frequency (in seconds, default: 120)") parser.add_argument("--gas-price-max", type=int, help="Maximum gas price (in Wei)") parser.add_argument("--gas-price-file", type=str, help="Gas price configuration file") parser.add_argument( "--smart-gas-price", dest='smart_gas_price', action='store_true', help= "Use smart gas pricing strategy, based on the ethgasstation.info feed" ) parser.add_argument("--debug", dest='debug', action='store_true', help="Enable debug output") self.arguments = parser.parse_args(args) self.web3 = kwargs['web3'] if 'web3' in kwargs else Web3( HTTPProvider( endpoint_uri= f"http://{self.arguments.rpc_host}:{self.arguments.rpc_port}", request_kwargs={"timeout": self.arguments.rpc_timeout})) self.web3.eth.defaultAccount = self.arguments.eth_from self.our_address = Address(self.arguments.eth_from) self.otc = MatchingMarket(web3=self.web3, address=Address( self.arguments.oasis_address)) self.tub = Tub(web3=self.web3, address=Address(self.arguments.tub_address)) self.vox = Vox(web3=self.web3, address=self.tub.vox()) self.sai = ERC20Token(web3=self.web3, address=self.tub.sai()) self.gem = ERC20Token(web3=self.web3, address=self.tub.gem()) logging.basicConfig( format='%(asctime)-15s %(levelname)-8s %(message)s', level=(logging.DEBUG if self.arguments.debug else logging.INFO)) logging.getLogger('urllib3.connectionpool').setLevel(logging.INFO) logging.getLogger('requests.packages.urllib3.connectionpool').setLevel( logging.INFO) self.min_eth_balance = Wad.from_number(self.arguments.min_eth_balance) self.bands_config = ReloadableConfig(self.arguments.config) self.gas_price = GasPriceFactory().create_gas_price(self.arguments) self.price_feed = PriceFeedFactory().create_price_feed( self.arguments.price_feed, self.arguments.price_feed_expiry, self.tub, self.vox) def main(self): with Lifecycle(self.web3) as lifecycle: lifecycle.initial_delay(10) lifecycle.on_startup(self.startup) lifecycle.on_block(self.on_block) lifecycle.every(3, self.synchronize_orders) lifecycle.on_shutdown(self.shutdown) def startup(self): self.approve() @retry(delay=5, logger=logger) def shutdown(self): self.cancel_all_orders() def on_block(self): # This method is present only so the lifecycle binds the new block listener, which makes # it then terminate the keeper if no new blocks have been arriving for 300 seconds. pass def approve(self): """Approve OasisDEX to access our balances, so we can place orders.""" self.otc.approve( [self.token_sell(), self.token_buy()], directly(gas_price=self.gas_price)) def price(self) -> Wad: return self.price_feed.get_price() def token_sell(self) -> ERC20Token: return self.gem def token_buy(self) -> ERC20Token: return self.sai def our_balance(self, token: ERC20Token) -> Wad: return token.balance_of(self.our_address) def our_orders(self): return self.otc.get_orders_by_maker(self.our_address) def our_sell_orders(self, our_orders: list): return list( filter( lambda order: order.buy_token == self.token_buy().address and order.pay_token == self.token_sell().address, our_orders)) def our_buy_orders(self, our_orders: list): return list( filter( lambda order: order.buy_token == self.token_sell().address and order.pay_token == self.token_buy().address, our_orders)) def synchronize_orders(self): # If market is closed, cancel all orders but do not terminate the keeper. if self.otc.is_closed(): self.logger.warning("Market is closed. Cancelling all orders.") self.cancel_all_orders() return # If keeper balance is below `--min-eth-balance`, cancel all orders but do not terminate # the keeper, keep processing blocks as the moment the keeper gets a top-up it should # resume activity straight away, without the need to restart it. if eth_balance(self.web3, self.our_address) < self.min_eth_balance: self.logger.warning( "Keeper ETH balance below minimum. Cancelling all orders.") self.cancel_all_orders() return bands = Bands(self.bands_config) our_orders = self.our_orders() target_price = self.price() # If the is no target price feed, cancel all orders but do not terminate the keeper. # The moment the price feed comes back, the keeper will resume placing orders. if target_price is None: self.logger.warning( "No price feed available. Cancelling all orders.") self.cancel_all_orders() return # If there are any orders to be cancelled, cancel them. It is deliberate that we wait with topping-up # bands until the next block. This way we would create new orders based on the most recent price and # order book state. We could theoretically retrieve both (`target_price` and `our_orders`) again here, # but it just seems cleaner to do it in one place instead of in two. cancellable_orders = bands.cancellable_orders( our_buy_orders=self.our_buy_orders(our_orders), our_sell_orders=self.our_sell_orders(our_orders), target_price=target_price) if len(cancellable_orders) > 0: self.cancel_orders(cancellable_orders) return # If there are any new orders to be created, create them. new_orders = bands.new_orders( our_buy_orders=self.our_buy_orders(our_orders), our_sell_orders=self.our_sell_orders(our_orders), our_buy_balance=self.our_balance(self.token_buy()), our_sell_balance=self.our_balance(self.token_sell()), target_price=target_price) if len(new_orders) > 0: self.create_orders(new_orders) # We do wait some time after the orders have been created. The reason for that is sometimes # orders that have been just placed were not picked up by the next `our_orders()` call # (one can presume the block hasn't been fully imported into the node yet), which made # the keeper try to place same order(s) again. Of course the second transaction did fail, but it # resulted in wasted gas and significant delay in keeper operation. # # There is no specific reason behind choosing to wait exactly 3s. time.sleep(3) def cancel_all_orders(self): """Cancel all orders owned by the keeper.""" self.cancel_orders(self.our_orders()) def cancel_orders(self, orders): """Cancel orders asynchronously.""" synchronize([ self.otc.kill( order.order_id).transact_async(gas_price=self.gas_price) for order in orders ]) def create_orders(self, new_orders): """Create orders asynchronously.""" def to_transaction(new_order: NewOrder): assert (isinstance(new_order, NewOrder)) if new_order.is_sell: return self.otc.make(pay_token=self.token_sell().address, pay_amount=new_order.pay_amount, buy_token=self.token_buy().address, buy_amount=new_order.buy_amount) else: return self.otc.make(pay_token=self.token_buy().address, pay_amount=new_order.pay_amount, buy_token=self.token_sell().address, buy_amount=new_order.buy_amount) synchronize([ transaction.transact_async(gas_price=self.gas_price) for transaction in map(to_transaction, new_orders) ])
class RadarRelayMarketMakerKeeper: """Keeper acting as a market maker on RadarRelay, on the WETH/SAI pair.""" logger = logging.getLogger('radarrelay-market-maker-keeper') def __init__(self, args: list, **kwargs): parser = argparse.ArgumentParser(prog='radarrelay-market-maker-keeper') parser.add_argument("--rpc-host", type=str, default="localhost", help="JSON-RPC host (default: `localhost')") parser.add_argument("--rpc-port", type=int, default=8545, help="JSON-RPC port (default: `8545')") parser.add_argument( "--eth-from", type=str, required=True, help="Ethereum account from which to send transactions") parser.add_argument("--tub-address", type=str, required=True, help="Ethereum address of the Tub contract") parser.add_argument( "--exchange-address", type=str, required=True, help="Ethereum address of the 0x Exchange contract") parser.add_argument("--weth-address", type=str, required=True, help="Ethereum address of the WETH token") parser.add_argument("--relayer-api-server", type=str, required=True, help="Address of the 0x Relayer API") parser.add_argument("--config", type=str, required=True, help="Buy/sell bands configuration file") parser.add_argument( "--price-feed", type=str, help= "Source of price feed. Tub price feed will be used if not specified" ) parser.add_argument( "--order-expiry", type=int, required=True, help="Expiration time of created orders (in seconds)") parser.add_argument( "--order-expiry-threshold", type=int, default=0, help= "Order expiration time at which order is considered already expired (in seconds)" ) parser.add_argument( "--min-eth-balance", type=float, default=0, help= "Minimum ETH balance below which keeper with either terminate or not start at all" ) parser.add_argument( '--cancel-on-shutdown', dest='cancel_on_shutdown', action='store_true', help= "Whether should cancel all open orders on RadarRelay on keeper shutdown" ) parser.add_argument("--gas-price", type=int, default=0, help="Gas price (in Wei)") parser.add_argument("--debug", dest='debug', action='store_true', help="Enable debug output") self.arguments = parser.parse_args(args) self.web3 = kwargs['web3'] if 'web3' in kwargs else Web3( HTTPProvider( endpoint_uri= f"http://{self.arguments.rpc_host}:{self.arguments.rpc_port}")) self.web3.eth.defaultAccount = self.arguments.eth_from self.our_address = Address(self.arguments.eth_from) self.tub = Tub(web3=self.web3, address=Address(self.arguments.tub_address)) self.vox = Vox(web3=self.web3, address=self.tub.vox()) self.sai = ERC20Token(web3=self.web3, address=self.tub.sai()) self.ether_token = ERC20Token(web3=self.web3, address=Address( self.arguments.weth_address)) logging.basicConfig( format='%(asctime)-15s %(levelname)-8s %(message)s', level=(logging.DEBUG if self.arguments.debug else logging.INFO)) self.bands_config = ReloadableConfig(self.arguments.config) self.min_eth_balance = Wad.from_number(self.arguments.min_eth_balance) self.price_feed = PriceFeedFactory().create_price_feed( self.arguments.price_feed, self.tub, self.vox) self.radar_relay = ZrxExchange(web3=self.web3, address=Address( self.arguments.exchange_address)) self.radar_relay_api = ZrxRelayerApi( exchange=self.radar_relay, api_server=self.arguments.relayer_api_server) def main(self): with Web3Lifecycle(self.web3) as lifecycle: self.lifecycle = lifecycle lifecycle.initial_delay(10) lifecycle.on_startup(self.startup) lifecycle.every(15, self.synchronize_orders) lifecycle.every(60 * 60, self.print_balances) lifecycle.on_shutdown(self.shutdown) def startup(self): self.approve() def shutdown(self): if self.arguments.cancel_on_shutdown: self.cancel_orders(self.our_orders()) def print_balances(self): sai_owned = self.sai.balance_of(self.our_address) weth_owned = self.ether_token.balance_of(self.our_address) self.logger.info( f"Keeper balances are {sai_owned} SAI, {weth_owned} + 0x-WETH") def approve(self): """Approve 0x to access our 0x-WETH and SAI, so we can sell it on the exchange.""" self.radar_relay.approve([self.ether_token, self.sai], directly()) def our_orders(self) -> list: our_orders = self.radar_relay_api.get_orders_by_maker(self.our_address) current_timestamp = int(time.time()) our_orders = list( filter( lambda order: order.expiration > current_timestamp - self. arguments.order_expiry_threshold, our_orders)) our_orders = list( filter( lambda order: self.radar_relay.get_unavailable_buy_amount( order) < order.buy_amount, our_orders)) return our_orders def our_sell_orders(self, our_orders: list) -> list: return list( filter( lambda order: order.buy_token == self.sai.address and order. pay_token == self.ether_token.address, our_orders)) def our_buy_orders(self, our_orders: list) -> list: return list( filter( lambda order: order.buy_token == self.ether_token.address and order.pay_token == self.sai.address, our_orders)) def synchronize_orders(self): """Update our positions in the order book to reflect keeper parameters.""" if eth_balance(self.web3, self.our_address) < self.min_eth_balance: self.lifecycle.terminate( "Keeper balance is below the minimum, terminating.") self.cancel_orders(self.our_orders()) return bands = Bands(self.bands_config) our_orders = self.our_orders() target_price = self.price_feed.get_price() if target_price is None: self.logger.warning( "Cancelling all orders as no price feed available.") self.cancel_orders(our_orders) return self.cancel_orders( itertools.chain( bands.excessive_buy_orders(self.our_buy_orders(our_orders), target_price), bands.excessive_sell_orders(self.our_sell_orders(our_orders), target_price), bands.outside_orders(self.our_buy_orders(our_orders), self.our_sell_orders(our_orders), target_price))) self.top_up_bands(our_orders, bands.buy_bands, bands.sell_bands, target_price) def cancel_orders(self, orders): """Cancel orders asynchronously.""" synchronize([ self.radar_relay.cancel_order(order).transact_async( gas_price=self.gas_price()) for order in orders ]) def excessive_orders_in_band(self, band, orders: list, target_price: Wad): """Return orders which need to be cancelled to bring the total order amount in the band below maximum.""" # if total amount of orders in this band is greater than the maximum, we cancel them all # # if may not be the best solution as cancelling only some of them could bring us below # the maximum, but let's stick to it for now orders_in_band = [ order for order in orders if band.includes(order, target_price) ] return orders_in_band if self.total_amount( orders_in_band) > band.max_amount else [] def top_up_bands(self, our_orders: list, buy_bands: list, sell_bands: list, target_price: Wad): """Create new buy and sell orders in all send and buy bands if necessary.""" self.top_up_buy_bands(our_orders, buy_bands, target_price) self.top_up_sell_bands(our_orders, sell_bands, target_price) def top_up_sell_bands(self, our_orders: list, sell_bands: list, target_price: Wad): """Ensure our WETH engagement is not below minimum in all sell bands. Place new orders if necessary.""" our_balance = self.ether_token.balance_of( self.our_address) #TODO deduct orders / or maybe not...? for band in sell_bands: orders = [ order for order in self.our_sell_orders(our_orders) if band.includes(order, target_price) ] total_amount = self.total_amount(orders) if total_amount < band.min_amount: have_amount = Wad.min(band.avg_amount - total_amount, our_balance) if (have_amount >= band.dust_cutoff) and (have_amount > Wad(0)): our_balance = our_balance - have_amount #TODO I think this line is unnecessary here want_amount = have_amount * round( band.avg_price(target_price)) if want_amount > Wad(0): order = self.radar_relay.create_order( pay_token=self.ether_token.address, pay_amount=have_amount, buy_token=self.sai.address, buy_amount=want_amount, expiration=int(time.time()) + self.arguments.order_expiry) order = self.radar_relay_api.calculate_fees(order) order = self.radar_relay.sign_order(order) self.radar_relay_api.submit_order(order) def top_up_buy_bands(self, our_orders: list, buy_bands: list, target_price: Wad): """Ensure our SAI engagement is not below minimum in all buy bands. Place new orders if necessary.""" our_balance = self.sai.balance_of( self.our_address) #TODO deduct orders / or maybe not...? for band in buy_bands: orders = [ order for order in self.our_buy_orders(our_orders) if band.includes(order, target_price) ] total_amount = self.total_amount(orders) if total_amount < band.min_amount: have_amount = Wad.min(band.avg_amount - total_amount, our_balance) if (have_amount >= band.dust_cutoff) and (have_amount > Wad(0)): our_balance = our_balance - have_amount #TODO I think this line is unnecessary here want_amount = have_amount / round( band.avg_price(target_price)) if want_amount > Wad(0): order = self.radar_relay.create_order( pay_token=self.sai.address, pay_amount=have_amount, buy_token=self.ether_token.address, buy_amount=want_amount, expiration=int(time.time()) + self.arguments.order_expiry) order = self.radar_relay_api.calculate_fees(order) order = self.radar_relay.sign_order(order) self.radar_relay_api.submit_order(order) def total_amount(self, orders): pay_amount_available = lambda order: order.pay_amount - ( self.radar_relay.get_unavailable_buy_amount( order) * order.pay_amount / order.buy_amount) return reduce(operator.add, map(pay_amount_available, orders), Wad(0)) def gas_price(self) -> GasPrice: if self.arguments.gas_price > 0: return FixedGasPrice(self.arguments.gas_price) else: return DefaultGasPrice()
class BiboxMarketMakerKeeper: """Keeper acting as a market maker on Bibox.""" logger = logging.getLogger() def __init__(self, args: list, **kwargs): parser = argparse.ArgumentParser(prog='bibox-market-maker-keeper') parser.add_argument( "--bibox-api-server", type=str, default="https://api.bibox.com", help= "Address of the Bibox API server (default: 'https://api.bibox.com')" ) parser.add_argument("--bibox-api-key", type=str, required=True, help="API key for the Bibox API") parser.add_argument("--bibox-secret", type=str, required=True, help="Secret for the Bibox API") parser.add_argument( "--bibox-timeout", type=float, default=9.5, help= "Timeout for accessing the Bibox API (in seconds, default: 9.5)") parser.add_argument( "--pair", type=str, required=True, help="Token pair (sell/buy) on which the keeper will operate") parser.add_argument("--config", type=str, required=True, help="Bands configuration file") parser.add_argument("--price-feed", type=str, required=True, help="Source of price feed") parser.add_argument( "--price-feed-expiry", type=int, default=120, help="Maximum age of the price feed (in seconds, default: 120)") parser.add_argument("--debug", dest='debug', action='store_true', help="Enable debug output") self.arguments = parser.parse_args(args) setup_logging(self.arguments) self.history = History() self.bibox_api = BiboxApi(api_server=self.arguments.bibox_api_server, api_key=self.arguments.bibox_api_key, secret=self.arguments.bibox_secret, timeout=self.arguments.bibox_timeout) self.bands_config = ReloadableConfig(self.arguments.config) self.price_feed = PriceFeedFactory().create_price_feed( self.arguments.price_feed, self.arguments.price_feed_expiry, None) self.order_book_manager = OrderBookManager(refresh_frequency=3) self.order_book_manager.get_orders_with( lambda: self.bibox_api.get_orders(pair=self.pair(), retry=True)) self.order_book_manager.get_balances_with( lambda: self.bibox_api.coin_list(retry=True)) self.order_book_manager.start() def main(self): with Lifecycle() as lifecycle: lifecycle.initial_delay(10) lifecycle.every(1, self.synchronize_orders) lifecycle.on_shutdown(self.shutdown) def shutdown(self): while True: try: our_orders = self.bibox_api.get_orders(self.pair(), retry=True) except: continue if len(our_orders) == 0: break self.cancel_orders(our_orders) self.order_book_manager.wait_for_order_cancellation() def pair(self): return self.arguments.pair.upper() def token_sell(self) -> str: return self.arguments.pair.split('_')[0].upper() def token_buy(self) -> str: return self.arguments.pair.split('_')[1].upper() def our_available_balance(self, our_balances: list, token: str) -> Wad: return Wad.from_number( next(filter(lambda coin: coin['symbol'] == token, our_balances))['balance']) def our_sell_orders(self, our_orders: list) -> list: return list(filter(lambda order: order.is_sell, our_orders)) def our_buy_orders(self, our_orders: list) -> list: return list(filter(lambda order: not order.is_sell, our_orders)) def synchronize_orders(self): bands = Bands(self.bands_config, self.history) order_book = self.order_book_manager.get_order_book() target_price = self.price_feed.get_price() if target_price is None: self.logger.warning( "Cancelling all orders as no price feed available.") self.cancel_orders(order_book.orders) return # Cancel orders cancellable_orders = bands.cancellable_orders( our_buy_orders=self.our_buy_orders(order_book.orders), our_sell_orders=self.our_sell_orders(order_book.orders), target_price=target_price) if len(cancellable_orders) > 0: self.cancel_orders(cancellable_orders) return # Do not place new orders if order book state is not confirmed if order_book.orders_being_placed or order_book.orders_being_cancelled: self.logger.debug( "Order book is in progress, not placing new orders") return # Place new orders self.place_orders( bands.new_orders( our_buy_orders=self.our_buy_orders(order_book.orders), our_sell_orders=self.our_sell_orders(order_book.orders), our_buy_balance=self.our_available_balance( order_book.balances, self.token_buy()), our_sell_balance=self.our_available_balance( order_book.balances, self.token_sell()), target_price=target_price)[0]) def cancel_orders(self, orders): for order in orders: self.order_book_manager.cancel_order( order.order_id, lambda order=order: self.bibox_api.cancel_order(order.order_id )) def place_orders(self, new_orders): def place_order_function(new_order_to_be_placed): amount = new_order_to_be_placed.pay_amount if new_order_to_be_placed.is_sell else new_order_to_be_placed.buy_amount amount_symbol = self.token_sell() money = new_order_to_be_placed.buy_amount if new_order_to_be_placed.is_sell else new_order_to_be_placed.pay_amount money_symbol = self.token_buy() new_order_id = self.bibox_api.place_order( is_sell=new_order_to_be_placed.is_sell, amount=amount, amount_symbol=amount_symbol, money=money, money_symbol=money_symbol) return Order(new_order_id, 0, new_order_to_be_placed.is_sell, Wad(0), amount, amount_symbol, money, money_symbol) for new_order in new_orders: self.order_book_manager.place_order( lambda new_order=new_order: place_order_function(new_order))
class BiboxMarketMakerKeeper: """Keeper acting as a market maker on Bibox.""" logger = logging.getLogger() def __init__(self, args: list, **kwargs): parser = argparse.ArgumentParser(prog='bibox-market-maker-keeper') parser.add_argument("--rpc-host", type=str, default="localhost", help="JSON-RPC host (default: `localhost')") parser.add_argument("--rpc-port", type=int, default=8545, help="JSON-RPC port (default: `8545')") parser.add_argument("--rpc-timeout", type=int, default=10, help="JSON-RPC timeout (in seconds, default: 10)") parser.add_argument("--tub-address", type=str, required=True, help="Ethereum address of the Tub contract") parser.add_argument("--bibox-api-server", type=str, default="https://api.bibox.com", help="Address of the Bibox API server (default: 'https://api.bibox.com')") parser.add_argument("--bibox-api-key", type=str, required=True, help="API key for the Bibox API") parser.add_argument("--bibox-secret", type=str, required=True, help="Secret for the Bibox API") parser.add_argument("--bibox-timeout", type=float, default=9.5, help="Timeout for accessing the Bibox API (in seconds, default: 9.5)") parser.add_argument("--pair", type=str, required=True, help="Token pair on which the keeper should operate") parser.add_argument("--config", type=str, required=True, help="Buy/sell bands configuration file") parser.add_argument("--price-feed", type=str, help="Source of price feed. Tub price feed will be used if not specified") parser.add_argument("--price-feed-expiry", type=int, default=120, help="Maximum age of non-Tub price feed (in seconds, default: 120)") parser.add_argument("--debug", dest='debug', action='store_true', help="Enable debug output") self.arguments = parser.parse_args(args) self.web3 = kwargs['web3'] if 'web3' in kwargs else Web3(HTTPProvider(endpoint_uri=f"http://{self.arguments.rpc_host}:{self.arguments.rpc_port}", request_kwargs={"timeout": self.arguments.rpc_timeout})) self.tub = None #Tub(web3=self.web3, address=Address(self.arguments.tub_address)) self.vox = None #Vox(web3=self.web3, address=self.tub.vox()) logging.basicConfig(format='%(asctime)-15s %(levelname)-8s %(message)s', level=(logging.DEBUG if self.arguments.debug else logging.INFO)) logging.getLogger('urllib3.connectionpool').setLevel(logging.INFO) logging.getLogger('requests.packages.urllib3.connectionpool').setLevel(logging.INFO) self.bibox_api = BiboxApi(api_server=self.arguments.bibox_api_server, api_key=self.arguments.bibox_api_key, secret=self.arguments.bibox_secret, timeout=self.arguments.bibox_timeout) self.bands_config = ReloadableConfig(self.arguments.config) self.price_feed = PriceFeedFactory().create_price_feed(self.arguments.price_feed, self.arguments.price_feed_expiry, self.tub, self.vox) self.bibox_order_book_manager = BiboxOrderBookManager(bibox_api=self.bibox_api, pair=self.pair(), refresh_frequency=3) def main(self): with Lifecycle(self.web3) as lifecycle: lifecycle.wait_for_sync(False) lifecycle.initial_delay(10) lifecycle.on_startup(self.startup) lifecycle.every(1, self.synchronize_orders) lifecycle.on_shutdown(self.shutdown) def startup(self): user_info = self.bibox_api.user_info(retry=True) self.logger.info(f"Bibox API key seems to be valid") self.logger.info(f"Accessing Bibox as user_id: '{user_info['user_id']}', email: '{user_info['email']}'") def shutdown(self): while True: try: our_orders = self.bibox_api.get_orders(self.bibox_order_book_manager.pair, retry=True) except: continue if len(our_orders) == 0: break self.cancel_orders(our_orders) self.bibox_order_book_manager.wait_for_order_cancellation() def price(self) -> Wad: return self.price_feed.get_price() def pair(self): return self.arguments.pair.upper() def token_sell(self) -> str: return self.arguments.pair.split('_')[0].upper() def token_buy(self) -> str: return self.arguments.pair.split('_')[1].upper() def our_balance(self, our_balances: list, token: str) -> Wad: return Wad.from_number(next(filter(lambda coin: coin['symbol'] == token, our_balances))['balance']) def our_sell_orders(self, our_orders: list) -> list: return list(filter(lambda order: order.is_sell, our_orders)) def our_buy_orders(self, our_orders: list) -> list: return list(filter(lambda order: not order.is_sell, our_orders)) def synchronize_orders(self): bands = Bands(self.bands_config) order_book = self.bibox_order_book_manager.get_order_book() target_price = self.price() if target_price is None: self.logger.warning("Cancelling all orders as no price feed available.") self.cancel_orders(order_book.orders) return # Cancel orders cancellable_orders = bands.cancellable_orders(our_buy_orders=self.our_buy_orders(order_book.orders), our_sell_orders=self.our_sell_orders(order_book.orders), target_price=target_price) if len(cancellable_orders) > 0: self.cancel_orders(cancellable_orders) return # Do not place new orders if order book state is not confirmed if order_book.in_progress: self.logger.debug("Order book is in progress, not placing new orders") return # Place new orders self.create_orders(bands.new_orders(our_buy_orders=self.our_buy_orders(order_book.orders), our_sell_orders=self.our_sell_orders(order_book.orders), our_buy_balance=self.our_balance(order_book.balances, self.token_buy()), our_sell_balance=self.our_balance(order_book.balances, self.token_sell()), target_price=target_price)) def cancel_orders(self, orders): for order in orders: self.bibox_order_book_manager.cancel_order(order.order_id) def create_orders(self, orders): for order in orders: amount = order.pay_amount if order.is_sell else order.buy_amount money = order.buy_amount if order.is_sell else order.pay_amount self.bibox_order_book_manager.place_order(is_sell=order.is_sell, amount=amount, amount_symbol=self.token_sell(), money=money, money_symbol=self.token_buy())
class OasisMarketMakerKeeper: """Keeper acting as a market maker on OasisDEX, on the W-ETH/SAI pair.""" logger = logging.getLogger('oasis-market-maker-keeper') def __init__(self, args: list, **kwargs): parser = argparse.ArgumentParser(prog='oasis-market-maker-keeper') parser.add_argument("--rpc-host", type=str, default="localhost", help="JSON-RPC host (default: `localhost')") parser.add_argument("--rpc-port", type=int, default=8545, help="JSON-RPC port (default: `8545')") parser.add_argument( "--eth-from", type=str, required=True, help="Ethereum account from which to send transactions") parser.add_argument("--tub-address", type=str, required=True, help="Ethereum address of the Tub contract") parser.add_argument("--oasis-address", type=str, required=True, help="Ethereum address of the OasisDEX contract") parser.add_argument("--config", type=str, required=True, help="Buy/sell bands configuration file") parser.add_argument( "--price-feed", type=str, help= "Source of price feed. Tub price feed will be used if not specified" ) parser.add_argument( "--round-places", type=int, default=2, help="Number of decimal places to round order prices to (default=2)" ) parser.add_argument( "--min-eth-balance", type=float, default=0, help= "Minimum ETH balance below which keeper with either terminate or not start at all" ) parser.add_argument("--gas-price", type=int, default=0, help="Gas price (in Wei)") parser.add_argument( "--gas-price-increase", type=int, help="Gas price increase (in Wei) if no confirmation within" " `--gas-price-increase-every` seconds") parser.add_argument( "--gas-price-increase-every", type=int, default=120, help="Gas price increase frequency (in seconds, default: 120)") parser.add_argument("--gas-price-max", type=int, help="Maximum gas price (in Wei)") parser.add_argument("--gas-price-file", type=str, help="Gas price configuration file") parser.add_argument( "--smart-gas-price", dest='smart_gas_price', action='store_true', help= "Use smart gas pricing strategy, based on the ethgasstation.info feed" ) parser.add_argument("--debug", dest='debug', action='store_true', help="Enable debug output") self.arguments = parser.parse_args(args) self.web3 = kwargs['web3'] if 'web3' in kwargs else Web3( HTTPProvider( endpoint_uri= f"http://{self.arguments.rpc_host}:{self.arguments.rpc_port}")) self.web3.eth.defaultAccount = self.arguments.eth_from self.our_address = Address(self.arguments.eth_from) self.otc = MatchingMarket(web3=self.web3, address=Address( self.arguments.oasis_address)) self.tub = Tub(web3=self.web3, address=Address(self.arguments.tub_address)) self.vox = Vox(web3=self.web3, address=self.tub.vox()) self.sai = ERC20Token(web3=self.web3, address=self.tub.sai()) self.gem = ERC20Token(web3=self.web3, address=self.tub.gem()) logging.basicConfig( format='%(asctime)-15s %(levelname)-8s %(message)s', level=(logging.DEBUG if self.arguments.debug else logging.INFO)) self.min_eth_balance = Wad.from_number(self.arguments.min_eth_balance) self.bands_config = ReloadableConfig(self.arguments.config) self.gas_price = GasPriceFactory().create_gas_price(self.arguments) self.price_feed = PriceFeedFactory().create_price_feed( self.arguments.price_feed, self.tub, self.vox) def main(self): with Web3Lifecycle(self.web3) as lifecycle: self.lifecycle = lifecycle lifecycle.initial_delay(10) lifecycle.on_startup(self.startup) lifecycle.on_block(self.synchronize_orders) lifecycle.on_shutdown(self.shutdown) def startup(self): self.approve() def shutdown(self): self.cancel_all_orders() def approve(self): """Approve OasisDEX to access our balances, so we can place orders.""" self.otc.approve([self.gem, self.sai], directly(gas_price=self.gas_price)) def our_orders(self): return list( filter(lambda order: order.maker == self.our_address, self.otc.get_orders())) def our_sell_orders(self, our_orders: list): return list( filter( lambda order: order.buy_token == self.sai.address and order. pay_token == self.gem.address, our_orders)) def our_buy_orders(self, our_orders: list): return list( filter( lambda order: order.buy_token == self.gem.address and order. pay_token == self.sai.address, our_orders)) def synchronize_orders(self): # If market is closed, cancel all orders but do not terminate the keeper. if self.otc.is_closed(): self.logger.warning("Marked is closed. Cancelling all orders.") self.cancel_all_orders() return # If keeper balance is below `--min-eth-balance`, cancel all orders but do not terminate # the keeper, keep processing blocks as the moment the keeper gets a top-up it should # resume activity straight away, without the need to restart it. if eth_balance(self.web3, self.our_address) < self.min_eth_balance: self.logger.warning( "Keeper ETH balance below minimum. Cancelling all orders.") self.cancel_all_orders() return bands = Bands(self.bands_config) our_orders = self.our_orders() target_price = self.price_feed.get_price() # If the is no target price feed, cancel all orders but do not terminate the keeper. # The moment the price feed comes back, the keeper will resume placing orders. if target_price is None: self.logger.warning( "No price feed available. Cancelling all orders.") self.cancel_all_orders() return # If there are any orders to be cancelled, cancel them. It is deliberate that we wait with topping-up # bands until the next block. This way we would create new orders based on the most recent price and # order book state. We could theoretically retrieve both (`target_price` and `our_orders`) again here, # but it just seems cleaner to do it in one place instead of in two. orders_to_cancel = list( itertools.chain( bands.excessive_buy_orders(self.our_buy_orders(our_orders), target_price), bands.excessive_sell_orders(self.our_sell_orders(our_orders), target_price), bands.outside_orders(self.our_buy_orders(our_orders), self.our_sell_orders(our_orders), target_price))) if len(orders_to_cancel) > 0: self.cancel_orders(orders_to_cancel) else: self.top_up_bands(our_orders, bands.buy_bands, bands.sell_bands, target_price) # We do wait some time after the orders have been created. The reason for that is sometimes # orders that have been just placed were not picked up by the next `our_orders()` call # (one can presume the block hasn't been fully imported into the node yet), which made # the keeper try to place same order(s) again. Of course the second transaction did fail, but it # resulted in wasted gas and significant delay in keeper operation. # # There is no specific reason behind choosing to wait exactly 7s. time.sleep(7) def cancel_all_orders(self): """Cancel all orders owned by the keeper.""" self.cancel_orders(self.our_orders()) def cancel_orders(self, orders): """Cancel orders asynchronously.""" synchronize([ self.otc.kill( order.order_id).transact_async(gas_price=self.gas_price) for order in orders ]) def top_up_bands(self, our_orders: list, buy_bands: list, sell_bands: list, target_price: Wad): """Asynchronously create new buy and sell orders in all send and buy bands if necessary.""" synchronize([ transact.transact_async(gas_price=self.gas_price) for transact in itertools.chain( self.top_up_buy_bands(our_orders, buy_bands, target_price), self.top_up_sell_bands(our_orders, sell_bands, target_price)) ]) def top_up_sell_bands(self, our_orders: list, sell_bands: list, target_price: Wad): """Ensure our WETH engagement is not below minimum in all sell bands. Yield new orders if necessary.""" our_balance = self.gem.balance_of(self.our_address) for band in sell_bands: orders = [ order for order in self.our_sell_orders(our_orders) if band.includes(order, target_price) ] total_amount = self.total_amount(orders) if total_amount < band.min_amount: have_amount = Wad.min(band.avg_amount - total_amount, our_balance) want_amount = have_amount * round(band.avg_price(target_price), self.arguments.round_places) if (have_amount >= band.dust_cutoff) and ( have_amount > Wad(0)) and (want_amount > Wad(0)): our_balance = our_balance - have_amount yield self.otc.make(pay_token=self.gem.address, pay_amount=have_amount, buy_token=self.sai.address, buy_amount=want_amount) def top_up_buy_bands(self, our_orders: list, buy_bands: list, target_price: Wad): """Ensure our SAI engagement is not below minimum in all buy bands. Yield new orders if necessary.""" our_balance = self.sai.balance_of(self.our_address) for band in buy_bands: orders = [ order for order in self.our_buy_orders(our_orders) if band.includes(order, target_price) ] total_amount = self.total_amount(orders) if total_amount < band.min_amount: have_amount = Wad.min(band.avg_amount - total_amount, our_balance) want_amount = have_amount / round(band.avg_price(target_price), self.arguments.round_places) if (have_amount >= band.dust_cutoff) and ( have_amount > Wad(0)) and (want_amount > Wad(0)): our_balance = our_balance - have_amount yield self.otc.make(pay_token=self.sai.address, pay_amount=have_amount, buy_token=self.gem.address, buy_amount=want_amount) @staticmethod def total_amount(orders: List[Order]): return reduce(operator.add, map(lambda order: order.pay_amount, orders), Wad(0))