def test_contract_wrapper__execute_method(
accounts,
contract_wrapper, # pylint: disable=redefined-outer-name
erc20_proxy_address,
):
"""Test :function:`BaseContractWrapper.execute` method."""
acc1_allowance = contract_wrapper.execute_method(
abi=abi_by_name("WETH9"),
method="allowance",
view_only=True,
args=(
to_checksum_address(accounts[3]),
to_checksum_address(erc20_proxy_address),
),
)
assert acc1_allowance == 0
with pytest.raises(Exception):
contract_wrapper.execute_method(
abi=abi_by_name("WETH9"),
method="send",
view_only=True,
args=[
to_checksum_address(accounts[3]),
to_checksum_address(erc20_proxy_address),
],
)
def weth_instance(web3_eth): # pylint: disable=redefined-outer-name
"""Get an instance of the WrapperEther contract."""
return web3_eth.contract(
address=to_checksum_address(
NETWORK_TO_ADDRESSES[NetworkId.GANACHE].ether_token),
abi=abi_by_name("WETH9"),
)
def zx_exchange(self):
"""Returns an instance of the 0x Exchange contract"""
if self._zx_exchange is None:
self._zx_exchange = self._web3_eth.contract(
address=self.exchange_address_checksumed,
abi=abi_by_name("exchange"))
return self._zx_exchange
def weth_instance(web3_eth): # pylint: disable=redefined-outer-name
"""Get an instance of the WrapperEther contract."""
return web3_eth.contract(
address=to_checksum_address(
chain_to_addresses(ChainId.GANACHE).ether_token),
abi=abi_by_name("WETH9"),
)
def __init__(
self,
provider: BaseProvider,
contract_address: str,
private_key: str = None,
):
"""Get an instance of the 0x Exchange smart contract wrapper.
:param provider: instance of :class:`web3.providers.base.BaseProvider`
:param private_key: str of private_key
"""
super(Exchange, self).__init__(
provider=provider,
contract_address=contract_address,
private_key=private_key,
)
self._web3_net = self._web3.net # pylint: disable=no-member
self.address = NETWORK_TO_ADDRESSES[NetworkId(
int(self._web3_net.version))].exchange
self._exchange = self._contract_instance(address=self.address,
abi=abi_by_name("Exchange"))