def __str__(self):
def amt(amount: Wad) -> str:
return f"{amount} " if amount is not None else ""
source_token_name = ERC20Token.token_name_by_address(self.source_token)
target_token_name = ERC20Token.token_name_by_address(self.target_token)
return f"[{amt(self.source_amount)}{source_token_name} -> {amt(self.target_amount)}{target_token_name} " \
f"@{self.rate} by {self.method} (max={self.max_source_amount} {source_token_name})]"
def approval_function(token: ERC20Token, spender_address: Address,
spender_name: str):
if token.allowance_of(Address(token.web3.eth.defaultAccount),
spender_address) < Wad(2**128 - 1):
logger = logging.getLogger("api")
logger.info(
f"Approving {spender_name} ({spender_address}) to access our {token.name()} directly"
)
if not token.approve(spender_address).transact():
raise RuntimeError("Approval failed!")
def approve(self, approval_function):
approval_function(ERC20Token(web3=self.web3, address=self.gem()),
self.jar(), 'Tub.jar')
approval_function(ERC20Token(web3=self.web3, address=self.skr()),
self.jar(), 'Tub.jar')
approval_function(ERC20Token(web3=self.web3, address=self.sai()),
self.pot(), 'Tub.pot')
approval_function(ERC20Token(web3=self.web3, address=self.skr()),
self.pit(), 'Tub.pit')
approval_function(ERC20Token(web3=self.web3, address=self.sai()),
self.pit(), 'Tub.pit')
def approval_function(token: ERC20Token, spender_address: Address,
spender_name: str):
if token.allowance_of(tx_manager.address,
spender_address) < Wad(2**128 - 1):
logger = logging.getLogger("api")
logger.info(
f"Approving {spender_name} ({spender_address}) to access our {token.name()}"
f" via TxManager {tx_manager.address}")
if not tx_manager.execute([], [
(token.approve(spender_address).invocation())
]).transact():
raise RuntimeError("Approval failed!")
def __init__(self, auction_manager, auction_id, auction_info):
self._auction_manager = auction_manager
self.auction_id = auction_id
self.creator = Address(auction_info[0])
self.selling = ERC20Token(web3=auction_manager.web3,
address=Address(auction_info[1]))
self.buying = ERC20Token(web3=auction_manager.web3,
address=Address(auction_info[2]))
self.start_bid = Wad(auction_info[3])
self.min_increase = auction_info[4]
self.min_decrease = auction_info[5]
self.sell_amount = Wad(auction_info[6])
self.ttl = auction_info[7]
self.reversed = auction_info[8]
self.unsold = auction_info[9]
def test_equals(self):
# given
token1 = DSToken.deploy(self.web3, 'ABC')
token2 = DSToken.deploy(self.web3, 'DEF')
token2b = ERC20Token(web3=self.web3, address=token2.address)
# expect
assert token1 == token1
assert token2 == token2b
assert not token1 == token2
assert not token1 == token2b
def __init__(self, lpc: Lpc):
self.lpc = lpc
rate = Ray(self.lpc.par() / (self.lpc.tag() * self.lpc.gap()))
#TODO we always leave 0.000001 in the liquidity pool, in case of some rounding errors
max_entry_ref = Wad.max(
(ERC20Token(web3=lpc.web3, address=lpc.alt()).balance_of(
lpc.address) / Wad(rate)) - Wad.from_number(0.000001),
Wad.from_number(0))
super().__init__(source_token=self.lpc.ref(),
target_token=self.lpc.alt(),
rate=rate,
max_source_amount=max_entry_ref,
method="lpc.take(alt)")
def __init__(self):
super().__init__()
self.tub_address = Address(self.config.get_contract_address("saiTub"))
self.tub = Tub(web3=self.web3, address=self.tub_address)
self.tap_address = Address(self.config.get_contract_address("saiTap"))
self.tap = Tap(web3=self.web3, address=self.tap_address)
self.top_address = Address(self.config.get_contract_address("saiTop"))
self.top = Top(web3=self.web3, address=self.top_address)
self.otc_address = Address(self.config.get_contract_address("otc"))
self.otc = SimpleMarket(web3=self.web3, address=self.otc_address)
self.skr = ERC20Token(web3=self.web3, address=self.tub.skr())
self.sai = ERC20Token(web3=self.web3, address=self.tub.sai())
self.gem = DSEthToken(web3=self.web3, address=self.tub.gem())
ERC20Token.register_token(self.tub.skr(), 'SKR')
ERC20Token.register_token(self.tub.sai(), 'SAI')
ERC20Token.register_token(self.tub.gem(), 'WETH')
def test_token_registry(self):
# given
ERC20Token.register_token(
Address('0x0100000000000000000000000000000000000000'), 'ABC')
ERC20Token.register_token(
Address('0x0200000000000000000000000000000000000000'), 'DEF')
ERC20Token.register_token(
Address('0x0300000000000000000000000000000000000000'), 'GHI')
# expect
assert ERC20Token.token_name_by_address(
Address('0x0100000000000000000000000000000000000000')) == 'ABC'
assert ERC20Token.token_name_by_address(
Address('0x0200000000000000000000000000000000000000')) == 'DEF'
assert ERC20Token.token_name_by_address(
Address('0x0300000000000000000000000000000000000000')) == 'GHI'
with pytest.raises(Exception):
assert ERC20Token.token_name_by_address(
Address('0x0400000000000000000000000000000000000000'))
# and
assert ERC20Token.token_address_by_name('ABC') == Address(
'0x0100000000000000000000000000000000000000')
assert ERC20Token.token_address_by_name('DEF') == Address(
'0x0200000000000000000000000000000000000000')
assert ERC20Token.token_address_by_name('GHI') == Address(
'0x0300000000000000000000000000000000000000')
with pytest.raises(Exception):
ERC20Token.token_address_by_name('XXX')
def test_should_have_printable_representation(self):
erc20token = ERC20Token(web3=self.web3, address=self.token.address)
assert repr(erc20token) == f"ERC20Token('{erc20token.address}')"
def register_tokens(token1, token2):
ERC20Token.register_token(token1, 'TK1')
ERC20Token.register_token(token2, 'TK2')
def approve(self, approval_function):
approval_function(ERC20Token(web3=self.web3, address=self.ref()),
self.address, 'Lpc')
approval_function(ERC20Token(web3=self.web3, address=self.alt()),
self.address, 'Lpc')
def __init__(self, chain: str):
with open('keeper/config.json') as data_file:
self.chain = chain
self.config = json.load(data_file)
for key, value in self.config[self.chain]["tokens"].items():
ERC20Token.register_token(Address(value), key)
def test_fail_when_no_token_with_that_address(self):
with pytest.raises(Exception):
ERC20Token(
web3=self.web3,
address=Address('0x0123456789012345678901234567890123456789'))
from keeper import Config
from keeper.api.token import DSToken
from keeper.api.token import ERC20Token
parser = argparse.ArgumentParser(description='Dai Buy&Burn keeper. Buys DAI for MKR on forward auctions.')
parser.add_argument("--rpc-host", help="JSON-RPC host (default: `localhost')", default="localhost", type=str)
parser.add_argument("--rpc-port", help="JSON-RPC port (default: `8545')", default=8545, type=int)
parser.add_argument("--eth-from", help="Ethereum account from which to send transactions", required=True, type=str)
parser.add_argument("--frequency", help="Frequency of periodical checking of existing auctions (in seconds) (default: 60)", default=60, type=int)
parser.add_argument("--mkr-dai-rate", help="Target MKR/DAI rate", required=True, type=float)
parser.add_argument("--minimal-mkr-bid", help="Minimal amount of MKR you want to bid", required=True, type=float)
parser.add_argument("--step", help="Incremental step towards the maximum price (value between 0 and 1)", required=True, type=float)
args = parser.parse_args()
web3 = Web3(HTTPProvider(endpoint_uri=f"http://{args.rpc_host}:{args.rpc_port}"))
web3.eth.defaultAccount = args.eth_from
config = Config(web3)
auction_manager_address = Address(config.get_contract_address("auctionManager"))
auction_manager = AuctionManager(web3=web3, address=auction_manager_address, is_splitting=True)
trader_address = Address(args.eth_from)
dai_address = ERC20Token.token_address_by_name("DAI")
dai_token = ERC20Token(web3=web3, address=dai_address)
mkr_address = ERC20Token.token_address_by_name("MKR")
mkr_token = DSToken(web3=web3, address=mkr_address)
strategy = BasicForwardAuctionStrategy(dai_token, mkr_token, args.mkr_dai_rate, args.step, Wad(args.minimal_mkr_bid * 1000000000000000000))
engine = AuctionEngine(auction_manager, trader_address, strategy, args.frequency)
engine.start()
