PancakeSwap Error with Brownie, revert: TransferHelper::transferFrom: transferFrom failed

Question

I am in bsc-testnet and have 0.3 WBNB in my wallet and I try to swap 0.1 WBNB for USDT with the function swapExactTokensForTokens()

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)

Here is my error and tx: VirtualMachineError: revert: TransferHelper::transferFrom: transferFrom failed https://testnet.bscscan.com/tx/0x6c8a7b802863afc92f61195dc952de1cb21d9b65b6df4205d5ad2e4a6813ed36

Answer 1

You're not approving the router to spend your WBNB. I never used brownie (or really done anything remotely complex in python, tbf x') ) so no idea how to code that exactly, but the idea is that you wanna send an approve(routerAddress, amountYouWantToSwap) transaction to the WBNB contract.