Hello, I have created an ERC20 token. I want to create a new contract called Presale and collect it here presale. The token can be purchased on both ETH and USDT.
There is one problem.
How can I set up selling with both ETH and USDT. So if the token price is 0.1USDT, if the person makes the payment with ETH, do I have to calculate it based on the ETH price over solidity?
What should the process be like here?