使用 python/web3 将资产发送到 Binance 地址时出错

Question

I am trying to send BNB from a Trust-Wallet with a python script to my binance account.

Simple function:

def send_bnb(to_public, from_public, from_secret, amount):
    nonce = web3.eth.getTransactionCount(from_public)
    tx = {
        'chainId': 97,
        'to': to_public,
        'nonce': nonce,
        'value': web3.toWei( amount,'ether'),
        'gas': 21000,
        'gasPrice': web3.toWei('50','gwei')
    }
    signed_tx = web3.eth.account.signTransaction( tx, from_secret)
    return web3.eth.sendRawTransaction(signed_tx.rawTransaction)

This works fine between two Trust-Wallet addresses, but fails if I try to send to my binance address.

Error is:

TypeError: Transaction had invalid fields: {'to': <to_public>}

The cause may be connected to the use of upper and lower case letters in the address, as I get the same error, if I convert the working Trust-Wallet address to lower case. But I found no hints on that so far.

Answer 1

After some more research I found the solution in the Web3.py Documentation . To me, it's not clearly stated there, that addresses must have an EIP55 checksum. But as the API provides functions to check and create these, I thought I give it a try, and it worked!

So after adding an additional line at the beginning of the function:

to_public=web3.toChecksumAddress(to_public)

it worked.