How to convert a public key to a Sui address?

Question

Im trying to convert a public key to a Sui address, but Im unsure how to do this with Sui Move. I found some information about using BLAKE2b hashing function, but Im not clear on why Sui Move doesnt provide a straightforward function for such an important task. How can I go about this conversion?

Xavier.eth · Accepted Answer

To convert a public key to a Sui address, you need to hash the signature scheme flag byte concatenated with the public key bytes using the BLAKE2b hashing function. The Sui address will be a 32-byte hash. You can find the BLAKE2b hashing function in the sui lib. If youre looking for a Rust example, you can check it out here.

skywinder · Answer

While Sui Move does not provide this function directly, using the BLAKE2b hashing function as described should get you the desired Sui address. Concatenating the flag byte with your public key bytes is a crucial step in this process.

BigDev · Answer

To turn a public key into a Sui address, just hash a single-byte signature scheme flag followed by the raw public key bytes using BLAKE2b-256. This gives you a 32-byte Sui address. The process ensures that each address encodes both the key type and its data. This is how Sui distinguishes between keys like Ed25519, Secp256k1, or Secp256r1. In Rust, you’d typically use the Sui SDK’s crypto utilities, which already include this logic. If you’re building this from scratch, use the blake2 crate to hash the flag + public key combo.

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