A UTF-8 string representing the properties of a specific discount offer, cryptographically signed.
- iOS 12.2+
- macOS 10.14.4+
- Mac Catalyst 13.0+
- tvOS 12.2+
- watchOS 6.2+
signature is a string signed with your private key that represents the properties of a specific discount offer. To keep your private key secure, generate the
signature on a server.
signature using the Elliptic Curve Digital Signature Algorithm (ECDSA) with SHA 256.