事务在试图退出aave时恢复

Question

我得到了一个示例，它将Aave令牌存放到Aave中。我正在使用Aave v2 github提供的代码契约示例

// Fork Kovan
await hre.network.provider.request({
    method: 'hardhat_reset',
    params: [{ forking: { jsonRpcUrl: KOVAN_JSON_RPC } }],
});

// Act like AAVE_HOLDER
await hre.network.provider.request({
    method: 'hardhat_impersonateAccount',
    params: [AAVE_HOLDER],
});
const signer = await hre.ethers.getSigner(AAVE_HOLDER);
console.log('signer:', signer.address);

// AAVE token on Kovan network
const aavetoken = IERC20__factory.connect(AAVE_TOKEN_ADDRESS, signer);
console.log('token balance:', (await aavetoken.balanceOf(signer.address)).toString());

const MyV2CreditDelegation = new MyV2CreditDelegation__factory(signer);
const delegation = await MyV2CreditDelegation.deploy({ gasLimit: 1e7 });
console.log('delegation:', delegation.address);

// Set the allowance higher than the deposit amount
// so we know we can make multiple transactions
let allowance = 100000
let despositAmount = 10;

await aavetoken.approve(delegation.address, allowance);
console.log('allowance:', (await aavetoken.allowance(signer.address, delegation.address, { gasLimit: 1e6 })).toString());

const depositTrans = await delegation.depositCollateral(aavetoken.address, despositAmount, true, { gasLimit: 1e6 });
console.log('depositTrans:', depositTrans.hash);
const depositReceipt = await depositTrans.wait();

但是，当我试图取款时，存款工作正常：

try  {
    var withdrawTrans = await delegation
        .withdrawCollateral(aavetoken.address,  { gasLimit: 1e6 })

    console.log('withdrawTrans:', withdrawTrans.hash);
    const withdrawReceipt = await withdrawTrans.wait();
}
catch (err) {
    console.log('Error:' + err);
}

我收到一个错误：

事务恢复:函数返回了意外数量的数据

我对“硬帽子”非常陌生，现在我知道如何进一步调试它了。我怎么才能退出Aave？

Answer 1

我也犯了同样的错误

事务恢复:函数返回了意外数量的数据

当我调用一个返回bytes32的外部契约上的函数，并将返回值分配给一个类型为字节的变量时，就会发生这种情况。

Contract1

    function Func1() external returns (bytes memory returnValue) {   
        returnValue = Contract2(contract2.address).Func2();
      }

在另一个Contract2上

bytes32 Var = 0x5d73888975b842f81b854bb06846b539e34142cbcd3cc5e5e7ec53bafb8ed151;

    function Func2() external returns (bytes32 returnValue) {   
        return Var(;
      }