FLashLoan aave v3

Question

我正在尝试使用Aave V3进行闪存贷款。在接口上，有一个名为flashLoanSimple()的函数，如下所示：

function flashLoanSimple(
    address receiverAddress,
    address asset,
    uint256 amount,
    bytes calldata params,
    uint16 referralCode
) external;

控制台返回一个错误：

ValueError: Gas评估失败：“执行失败是由于异常。”此事务可能会恢复。如果你想广播，你必须手动设置气体限制。

我不知道是哪一个问题，因为我把Dai存在合同地址上，然后试着让flashLoan和失败。

下面是完整的代码：

contract Flasher is FlashLoanSimpleReceiverBase, Withdrawable {
constructor(IPoolAddressesProvider _providerAddress)
    FlashLoanSimpleReceiverBase(_providerAddress)
{}

function flashLoanSimple(address asset, uint256 amount) external {
    require(asset != address(0), "Address zero no");
    require(amount > 0, "Pone plata");
    address receiverAddress = address(this);
    uint256 _amount = amount * 10**18;
    bytes memory params = "";
    uint16 referralCode = 0;

    POOL.flashLoanSimple(
        receiverAddress,
        asset,
        _amount,
        params,
        referralCode
    );
}

function executeOperation(
    address asset,
    uint256 amount,
    uint256 premium,
    address initiator,
    bytes calldata params
) external override returns (bool) {
    //logic.....

    //cALCULAR PRIMA
    uint256 fee = LowGasSafeMath.add(amount, premium);
    IERC20(asset).approve(address(POOL), fee);
    return true;
}

Answer 1

您忘记关闭您在合同中打开的括号“}”。检查是否仅是导致该错误的原因。我也看到你引进了'SafeMath‘而不是'LowGasSafeMath’。