# init(compactRepresentation:) Creates a P-256 public key for key agreement from a compact representation of the key. ``` init(compactRepresentation: Bytes) throws where Bytes : ContiguousBytes ``` ## Parameters `compactRepresentation` A compact representation of the key as a collection of contiguous bytes. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)