To convert a public key into a Sui address, you need to hash the signature scheme flag byte concatenated with the public key bytes using the BLAKE2b hashing function. The resulting Sui address is a 32-byte hash. You can utilize the BLAKE2b function available in the Sui library, specifically in their 'crypto/hash.move' module. Here's a useful link with a Rust example for setting up Sui addresses: Rust Example.