一笔交易中的多次转账？

Question

I am writing a program in Python using the web3 library, which needs to make several translations in a single transaction. Here is an example. But I didn't find anything about it in the documentation. Some examples do several transactions through a loop, but it doesn't suit me at all.

Answer 1

You have only two ways for this.

1. You need build your own contract, that do all this transactions by one contract call.
2. You need use multicall -- this is special contract, exists at every network. You send you transaction to multicall contract and run all by one call.

Answer 2

Creating a smart contract is the only way to do it.

something like this:

function multiSwap(uint256 deadline, uint256 amountOutMinUniswap) external payable {

    uint256 amountOutMinBancor = 1;
    uint256 amountOutMinSushiSwap = 1;

    _tradeOnBancor(msg.value, amountOutMinBancor);
    _tradeOnSushi(IERC20(BNT).balanceOf(address(this)), amountOutMinSushiSwap, deadline);
    _tradeOnUniswap(IERC20(INJ).balanceOf(address(this)), amountOutMinUniswap, deadline);

}

Check out a great article by Markus Waas - Making multiple swaps