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 __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})]"
