python - 尝试使用 web3.py 库在以太坊中调用 balanceOf 函数但出现错误

Question

    import json
    from web3 import Web3
    infura_url = "https://mainnet.infura.io/v3/5b314a9b373442fc8ed0c9cd184e838f"
    web3 = Web3(Web3.HTTPProvider(infura_url))
    abi=json.loads('[{"constant":true,"inputs":..........] large array')
    address = "0xd26114cd6EE289AccF82350c8d8487fedB8A0C07"
    contract = web3.eth.contract(address=address, abi=abi)
    totalSupply = contract.functions.totalSupply().call()
    print(totalSupply)
    print(contract.functions.name().call())
    print(contract.functions.symbol().call())
    balance = contract.functions.balanceOf('0x2551d2357c8da54b7d330917e0e769d33f1f5b93').call()
    print(web3.fromWei(balance, 'ether'))

但是当我运行此代码时，我收到此错误

web3.exceptions.InvalidAddress: ('Web3.py only accepts checksum addresses. The software that gave you this non-checksum address should be considered unsafe, please file it as a bug on their platform. Try using an ENS name instead. Or, if you must accept lower safety, use Web3.toChecksumAddress(lower_case_address).', '0x2551d2357c8da54b7d330917e0e769d33f1f5b93')--> error at this line

Answer 1

可能的解决方案:

您没有显示您的 Web3 版本，此时 来自魏功能过时并从文档中删除。
contract.functions.balanceOf('0x2551d2357c8da54b7d330917e0e769d33f1f5b93').call()
您在上述函数中出错，因为您插入的地址不是校验和地址。如果你不明白什么是校验和地址，here你有一个很好的解释，在这种情况下该怎么办？显然你需要转换你在 contract.functions.balanceOf 上插入的地址至 checksum address .

address2 = Web3.toChecksumAddress('0x2551d2357c8da54b7d330917e0e769d33f1f5b93')
balance=contract.functions.balanceOf(address2).call()

#Don't use fromWei function if its not defined on your Web3 documentation