如何在智能合约中使用不同的代币进行批量交易？

Question

I have this smart contract I found on github that is able to send multiple transactions but they all should be for the same token. but what I want is a smart contract that sends multiple transactions for different tokens like the picture I added, if anyone knows how let me know or send a link to a similar smart contract or project.

Answer 1

You can invoke the transfer() (sending tokens from your contract) or transferFrom() (sending tokens from other address, need to have prior approval) functions on multiple token contracts.

Assuming that from address has approved MyContract address to operate their tokens (both token1 and token2 ), the example below transfers both token1 and token2 within one transaction.

pragma solidity ^0.8;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

contract MyContract {
    function batchTransfer(address token1, address token2, address from, address to, uint256 amount) public {
        bool success1 = IERC20(token1).transferFrom(from, to, amount);
        bool success2 = IERC20(token2).transferFrom(from, to, amount);
    }
}