使用onboard.js查询钱包数据返回异常错误

Question

我使用的是来自Onboard.js的代码：

import ethers from 'ethers'
import erc20 from './erc20'

function tokenBalance({ tokenAddress, minimumBalance, tokenName }) {
  let ethersProvider;
  let tokenContract;

  return async stateAndHelpers => {
    const {
      wallet: { provider },
      address,
      BigNumber
    } = stateAndHelpers;

    if (!tokenContract) {
      ethersProvider = new ethers.providers.Web3Provider(provider);
      tokenContract = new ethers.Contract(tokenAddress, erc20, ethersProvider);
    }

    const tokenDecimals = await tokenContract.decimals();
    const divideBy = new BigNumber(10).pow(tokenDecimals);
    const tokenBalanceResult = await tokenContract
      .balanceOf(address)
      .then(res => res.toString());
    const tokenBalance = new BigNumber(tokenBalanceResult).div(divideBy);

    if (tokenBalance.lt(minimumBalance)) {
      return {
        heading: `Get Some ${tokenName}`,
        description: `You need to have at least ${minimumBalance} ${tokenName} to interact with this Dapp. Send some more ${tokenName} to this address or switch to another address that has a higher ${tokenName} balance.`,
        eventCode: "tokenBalance",
        icon: `
            <svg 
                height="18" 
                viewBox="0 0 429 695" 
                width="18" xmlns="http://www.w3.org/2000/svg"
            >
                <g 
                    fill="currentColor" 
                    fill-rule="evenodd"
            >
                 <path d="m0 394 213 126.228516 214-126.228516-214 301z"/>
             <path d="m0 353.962264 213.5-353.962264 213.5 353.962264-213.5 126.037736z"/>
            </g>
           </svg>
        `
      };
    }
  };
}

const defaultWalletChecks = [
    { checkName: 'connect' },
    { checkName: 'network' },
    { checkName: 'balance', minimumBalance: '100000' }
]

const tokenBalanceCheck = tokenBalance({tokenAddress: '0x6b175474e89094c44da98b954eedeac495271d0f', tokenName: 'Dai', minimumBalance: 5})

const onboard = Onboard({
    //... other options
    walletCheck: [...defaultWalletChecks, tokenBalanceCheck]
})

我得到了这个错误：Error: call revert exception (method="balanceOf(address)", errorSignature=null, errorArgs=[null], reason=null, code=CALL_EXCEPTION, version=abi/5.1.0)

唯一的区别是，我使用的是从外部获得的erc20 abi格式。我还检查了我的网络和地址是否正确。不知道为什么我会得到这个错误，所以任何帮助都将不胜感激！

Answer 1

当您的智能合约尚未部署时，会发生此错误(CALL_EXCEPTION)。

等待事务结束：

await contract.deployTransaction.wait()

只有在这之后，你才能用契约来做一些事情，因为你得到了它的平衡。