def test_method_id_type_error():
"""Test that passing in wrong types raises TypeError."""
with pytest.raises(TypeError):
method_id(123, [])
with pytest.raises(TypeError):
method_id("ERC20Token", 123)
def decode_erc721_asset_data(asset_data: str) -> ERC721AssetData:
"""Decode an ERC721 asset data hex string.
>>> decode_erc721_asset_data('0x025717920000000000000000000000001dc4c1cefef38a777b15aa20260a54e584b16c480000000000000000000000000000000000000000000000000000000000000001')
ERC721AssetData(asset_proxy_id='0x02571792', token_address='0x1dc4c1cefef38a777b15aa20260a54e584b16c48', token_id=1)
""" # noqa: E501 (line too long)
assert_is_string(asset_data, "asset_data")
if len(asset_data) < ERC721_ASSET_DATA_MINIMUM_BYTE_LENGTH:
raise ValueError(
"Could not decode ERC721 Asset Data. Expected length of encoded" +
f"data to be at least {ERC721_ASSET_DATA_MINIMUM_BYTE_LENGTH}. " +
f"Got {len(asset_data)}.")
asset_proxy_id: str = asset_data[0:SELECTOR_LENGTH]
if asset_proxy_id != abi_utils.method_id("ERC721Token",
["address", "uint256"]):
raise ValueError(
"Could not decode ERC721 Asset Data. Expected Asset Proxy Id to be"
+ f" ERC721 (" +
f"{abi_utils.method_id('ERC721Token', ['address', 'uint256'])}" +
f"), but got {asset_proxy_id}")
(token_address, token_id) = eth_abi.decode_abi(
["address", "uint256"], bytes.fromhex(asset_data[SELECTOR_LENGTH:]))
return ERC721AssetData(
asset_proxy_id=asset_proxy_id,
token_address=token_address,
token_id=token_id,
)
def decode_erc20_asset_data(asset_data: str) -> ERC20AssetData:
"""Decode an ERC20 asset data hex string.
:param asset_data: String produced by prior call to encode_erc20_asset_data()
>>> decode_erc20_asset_data("0xf47261b00000000000000000000000001dc4c1cefef38a777b15aa20260a54e584b16c48")
ERC20AssetData(asset_proxy_id='0xf47261b0', token_address='0x1dc4c1cefef38a777b15aa20260a54e584b16c48')
""" # noqa: E501 (line too long)
assert_is_string(asset_data, "asset_data")
if len(asset_data) < ERC20_ASSET_DATA_BYTE_LENGTH:
raise ValueError(
"Could not decode ERC20 Proxy Data. Expected length of encoded" +
f" data to be at least {str(ERC20_ASSET_DATA_BYTE_LENGTH)}." +
f" Got {str(len(asset_data))}.")
asset_proxy_id: str = asset_data[0:SELECTOR_LENGTH]
if asset_proxy_id != abi_utils.method_id("ERC20Token", ["address"]):
raise ValueError(
"Could not decode ERC20 Proxy Data. Expected Asset Proxy Id to be"
+ f" ERC20 ({abi_utils.method_id('ERC20Token', ['address'])})" +
f" but got {asset_proxy_id}.")
# workaround for https://github.com/PyCQA/pylint/issues/1498
# pylint: disable=unsubscriptable-object
token_address = eth_abi.decode_abi(["address"],
bytes.fromhex(
asset_data[SELECTOR_LENGTH:]))[0]
return ERC20AssetData(asset_proxy_id=asset_proxy_id,
token_address=token_address)
def decode_erc721_asset_data(asset_data: str) -> ERC721AssetData:
# docstring considered all one line by pylint: disable=line-too-long
"""Decode an ERC721 asset data hex string.
>>> decode_erc721_asset_data('0x025717920000000000000000000000001dc4c1cefef38a777b15aa20260a54e584b16c480000000000000000000000000000000000000000000000000000000000000001')
{'asset_proxy_id': '0x02571792', 'token_address': '0x1dc4c1cefef38a777b15aa20260a54e584b16c48', 'token_id': 1}
""" # noqa: E501 (line too long)
assert_is_string(asset_data, "asset_data")
if len(asset_data) < ERC721_ASSET_DATA_MINIMUM_BYTE_LENGTH:
raise ValueError(
"Could not decode ERC721 Asset Data. Expected length of encoded"
+ f"data to be at least {ERC721_ASSET_DATA_MINIMUM_BYTE_LENGTH}. "
+ f"Got {len(asset_data)}."
)
asset_proxy_id: str = asset_data[0:SELECTOR_LENGTH]
# prefer `black` formatting. pylint: disable=C0330
if asset_proxy_id != abi_utils.method_id(
"ERC721Token", ["address", "uint256"]
):
raise ValueError(
"Could not decode ERC721 Asset Data. Expected Asset Proxy Id to be"
+ f" ERC721 ("
+ f"{abi_utils.method_id('ERC721Token', ['address', 'uint256'])}"
+ f"), but got {asset_proxy_id}"
)
(token_address, token_id) = eth_abi.decode_abi(
["address", "uint256"], bytes.fromhex(asset_data[SELECTOR_LENGTH:])
)
return {
"asset_proxy_id": asset_proxy_id,
"token_address": token_address,
"token_id": token_id,
}