P256K P256K P256K.Schnorr P256K.Schnorr.Nonce dataRepresentation Instance Property dataRepresentation A 66-byte data representation of the public nonce in BIP-327 wire format. iOS 13.0+ macCatalyst 13.0+ macOS 10.15+ tvOS 13.0+ visionOS 1.0+ watchOS 6.0+ var dataRepresentation: Data { get }