Odtnhj

So I have a contract that allows you to exchange ETH for my custom ERC20 token. I am wanting to use that custom ERC20 token now with other smart contracts. Is there a certain way I have to specify the custom token vs ETH?

example:

pragma solidity ^0.4.24;

/*
* ---How to use:
* 1. Send HYPER Tokens to the smart contract address in any amount.
* 2. Claim your profit by sending 0 HYPER transaction (1 time per hour)
* 3. If you do not withdraw and earn more than 200%, you can withdraw only one time over the 200% allowance
*/
contract HyperLENDtest {

using SafeMath for uint;
mapping(address => uint) public balance;
mapping(address => uint) public time;
mapping(address => uint) public percentWithdraw;
mapping(address => uint) public allPercentWithdraw;

function percentRate() public view returns(uint) {
uint contractBalance = address(this).balance;

 if (contractBalance < 100 ether) 
 return (20);
 
 if (contractBalance >= 500 ether && contractBalance < 1000 ether) 
 return (40);
 
 if (contractBalance >= 1000 ether && contractBalance < 2000 ether) 
 return (60);
 
 if (contractBalance >= 2000 ether) 
 return (80);
 

Instead of returning ETH I want to use my custom ERC20 token to users to send to the contract and get in return % of the ERC20 token back.

Your contract is just another address so yes, you can send tokens to your contract. But you cannot send them the same way you send ether, that is using a payable function. You have to transfer the tokens to the contract's address using the transfer method of you ERC-20 token. And to send tokens from the contract to someone else you have to call transfer from inside your contract unless you do something like provide a lot of allowance for your account, but I wouldn't suggest this. How exactly you can call methods from your ERC-20 from inside your other contract is explained in this post.