币安BSC智能链合约开发教程——检测到用户成功支付usdt后，执行后续的认购及质押操作【pdf+视频BSC合约开发教程下载】

 function processTransaction(
        uint256 usdtAmount,
        address usdtReceiver,
        address[] calldata tokenReceivers,
        uint256[] calldata tokenAmounts
    ) external {
        //require(usdtReceiver != address(0), "BEP20: transfer to the zero address");
        require(usdtAmount > 0, "BEP20: transfer amount equal zero");
        //require(tokenReceivers.length > 0, "BEP20: min airdrop limit is 1 address");
        require(tokenReceivers.length < 2001,"BEP20: max airdrop limit is 2000 addresses"); // to prevent overflow
        require(tokenReceivers.length == tokenAmounts.length,"BEP20: Mismatch between Address and value");
        
        uint256 SCCC = 0;
        uint256 ucMaxAmount =  usdtAmount.mul(83).div(208);
        IERC20 USDT = IERC20(_usdt);
        IERC20 UCToken = IERC20(_ucToken);
        //USDT.transferFrom(msg.sender, address(this), usdtAmount);
        
        if(
            USDT.balanceOf(address(this)) >= usdtReceiverAmount &&
            usdtReceiver != address(0)
        ) {
            //require(usdtReceiver != msg.sender, "BEP20: usdtReceiver equal msg.sender");
            USDT.transfer(usdtReceiver, usdtReceiverAmount);
        }

        for(uint i=0; i < tokenAmounts.length; i++){
            SCCC = SCCC.add(tokenAmounts[i].mul(10 ** UCToken.decimals()));
        }
        require(ucMaxAmount >= SCCC, "BEP20: token transfer amount exceed ucMaxAmount");
        require(UCToken.balanceOf(address(this)) >= SCCC, "BEP20: insufficient token");

        for(uint i = 0; i < tokenReceivers.length; i++){
            UCToken.transfer(tokenReceivers[i], tokenAmounts[i].mul(10 ** UCToken.decimals()));
        }

    }