PancakeSwap错误与Brownie，还原: TransferHelper:: transferFrom : transferFrom失败

Question

我在bsc-testnet，钱包里有0.3 WBNB，我试图用函数swapExactTokensForTokens()将0.1 WBNB换成USDT

Token1 = '0xae13d989daC2f0dEbFf460aC112a837C89BAa7cd'
Token2 = '0xeD24FC36d5Ee211Ea25A80239Fb8C4Cfd80f12Ee'

Pancakerouter = interface.IPancakeRouter01('0x9Ac64Cc6e4415144C455BD8E4837Fea55603e5c3')

Executeswap = Pancakerouter.swapExactTokensForTokens(
        Web3.toWei(0.1, "ether"),
        0,
        [Token1,Token2],
        account,
        int(time.time()) + 10 * 600,
        {"from": account, "gas_limit": 10000000, "allow_revert": True},
    )
Executeswap.wait(1)

这是我的错误和tx：VirtualMachineError: revert: TransferHelper::transferFrom: transferFrom failed https://testnet.bscscan.com/tx/0x6c8a7b802863afc92f61195dc952de1cb21d9b65b6df4205d5ad2e4a6813ed36

Answer 1

你不会批准路由器花你的WBNB。我从来没有使用过brownie (或者在python，tbf‘中做了一些非常复杂的事情)，所以我不知道如何准确地编写代码，但是想法是您想要向WBNB合同发送一个approve(routerAddress, amountYouWantToSwap)事务。