In presale smart contract on Ethereum, do we need multiple wallet address?

[marksantiago290]

Hi mates.
I am writing presale smart contract on Ethereum using Solidity, I need to make users to buy tokens with Eth, USDT, and BNB.
In general, do I need each wallet address for holding Eth, USDT, and BNB?
Thx

[luckypenny1632333]

Hi @marksantiago02
In presale smart contract, you don't need each wallet address.
The contract itself can hold different cryptocurrencies.
The contract owner can set which withdrawl method he is going use, like USDT, USDC..
Hope you get the point.
Thx

[marksantiago290]

We need token exchange?

[luckypenny1632333]

No, contract manage each token, but you need to consider exchange rate, like eth/usd, bnb/usd.
You can use AggregatorV3Interface for catching latest exchange rate.
Thx