Question

我正在尝试创建一个 bep20 代币，其中一定比例的交易量转换为 BNB，然后发送到指定的慈善钱包以存储 BNB 以备将来捐赠。该代币的另一个特点是交易的另一部分也被交换为 BNB，并与流动性池中的代币锁定在一起。最后一个功能正在运行，但是，我设置为慈善钱包的钱包没有接收 BNB。我已经用测试代币和少量 BNB 建立了一个流动性池，这就是我如何了解到它没有按照它的设计目的进行的。这个代币是 YUMMY 的一个分支，完整的合约可以在这里查看：https://bscscan.com/address/0x05f2df7b3d612a23fe12162a6c996447dce728a5#code

function sendBNBToCharity(uint256 amount) private { 
    swapTokensForEth(amount); 
    _charityWalletAddress.transfer(address(this).balance); 
}

function _setCharityWallet(address payable charityWalletAddress) external onlyOwner() {
    _charityWalletAddress = charityWalletAddress;
}

function swapAndLiquify(uint256 contractTokenBalance) private lockTheSwap {
    // split the contract balance into thirds
    uint256 halfOfLiquify = contractTokenBalance.div(4);
    uint256 otherHalfOfLiquify = contractTokenBalance.div(4);
    uint256 portionForFees = contractTokenBalance.sub(halfOfLiquify).sub(otherHalfOfLiquify);

    // capture the contract's current ETH balance.
    // this is so that we can capture exactly the amount of ETH that the
    // swap creates, and not make the liquidity event include any ETH that
    // has been manually sent to the contract
    uint256 initialBalance = address(this).balance;

    // swap tokens for ETH
    swapTokensForEth(halfOfLiquify); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered
    swapTokensForEth(portionForFees);
    // how much ETH did we just swap into?
    uint256 newBalance = address(this).balance.sub(initialBalance);

    // add liquidity to uniswap
    addLiquidity(otherHalfOfLiquify, newBalance);
    sendBNBToCharity(portionForFees);
    
    emit SwapAndLiquify(halfOfLiquify, newBalance, otherHalfOfLiquify);
}

function swapTokensForEth(uint256 tokenAmount) private {
    // generate the uniswap pair path of token -> weth
    address[] memory path = new address[](2);
    path[0] = address(this);
    path[1] = uniswapV2Router.WETH();

    _approve(address(this), address(uniswapV2Router), tokenAmount);

    // make the swap
    uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
        tokenAmount,
        0, // accept any amount of ETH
        path,
        address(this),
        block.timestamp
    );
}

Answer 1

您的 swapTokensForEth 函数正在交换为 WETH，而不是 ETH。 Wrapped ETH 是一种持有 ETH 的币，使其具有 ERC20 代币的作用，因此可以在 Uniswap 等地方使用。

要从您的 WETH 中取出 ETH，您需要致电 WETH.withdraw(amount)，这会将您的 WETH 转换回 ETH。

BEP20 代币不会被兑换成 BNB 并被发送到慈善钱包

1 个答案: