What is VRF's?

A Verifiable Random Function (VRF) is a cryptographic primitive that produces a pseudorandom output along with a proof that anyone can use to verify the output's correctness and that it was indeed generated by the VRF owner. This makes it possible to generate unpredictable and unbiased random values in a publicly verifiable manner. VRFs are commonly used in blockchain applications to randomly select block proposers, committee members, or lottery winners in a provably fair way. They are also used in other distributed systems where verifiable randomness is required.