def contract(self, *args, **kwargs):
ContractFactoryClass = kwargs.pop('ContractFactoryClass', Contract)
contract_name = kwargs.pop('contract_name', None)
has_address = any((
'address' in kwargs,
len(args) >= 1 and is_address(args[0]),
len(args) >= 2 and is_address(args[1]),
))
for potential_address in args:
validate_address_checksum(potential_address)
if has_address:
if 'address' in kwargs:
address = kwargs.pop('address')
elif is_address(args[0]):
address = args[0]
elif is_address(args[1]):
address = args[1]
kwargs['abi'] = args[0]
validate_address(address)
return ContractFactoryClass.factory(self.web3, contract_name,
**kwargs)(address)
else:
try:
kwargs['abi'] = args[0]
except IndexError:
pass
return ContractFactoryClass.factory(self.web3, contract_name,
**kwargs)
def input_address_formatter(addr):
iban = Iban(addr)
if iban.isValid() and iban.isDirect():
return add_0x_prefix(iban.address())
elif is_address(addr):
validate_address_checksum(addr)
return to_normalized_address(addr)
raise ValueError("invalid address")