token transfer smart contract

token_transfer_smart_contract

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.14;

import {IERC20} from "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol";

contract MyUsdtTransfer{

    mapping(string => uint) public orders; //orderNo => orderType


    function getAllowance(address _token) public view returns(uint256) {
        IERC20 token = IERC20(_token);
        return token.allowance(msg.sender, address(this));
    }

    // to = Account B's address
    function stake(address _token, address receiver, uint amount,string memory _no,uint _type) public {
        IERC20 token = IERC20(_token);
        //require(orders[_no] == 0,"the order id is used");
        orders[_no] = _type;
        token.transferFrom(msg.sender, receiver, amount);
    }
 
}