Test against Solidity smart contracts

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Feature Test To Be Requested

I would like an example to test against smart contracts.
On my application, I have a smart contract that needs to be called to check some data in the contract. I need this data to reach my back-end application somehow.

Thing is, I could test the contract against a testnet, but it would take too long to respond. And it would depend on the testnet being live.

The best way to do it would be using something like what `hardhat` does, but I have no idea how it implements a "local" blockchain for testing and how I can replicate it on nestjs testing environment. If anyone have an idea, please suggest me. I might implement it. Because for my use case it is really necessary.