How to test interactions of my contract with other contracts, like a USDT/BUSD on a hardhat local environment?

Smart Contracts
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1

I write a smart contract, that should interact with another smart contract, such as USDT and BUSD.
I use a hardhat environment and her local environment, not a testnet.
For testing those interactions I must copy needed smart contracts locally, or I can just extend safeERC20 with name USDT and BUSD accordingly?

2

It is up to you, but I think you can also fork the mainnet to test, for more details, you can have a look at Mainnet forking | Hardhat

3

you have to deploy to the testnet or create an erc20 token to simulate on your local blockchain

4

Thank you, it's help me!
Do you know any examples with tests where you need to transfer from a third-party contract and wallet to a tested contract and withdraw back?

5

Thanks for asking, this will be also one of my next questions :rofl: