Can a smart contract know its own address?

Question

Is it possible to create a smart contract that knows the value of its KT1 address?

E.g. if you wanted the contract to check that there was a signature signed over its contract address, would it be able to find it/refer to it?

Answer 1

Yes, Michelson provides the following instruction SELF_ADDRESS

In SmartPy you can use sp.self_address