Structs

Putting together all of the basic types covered in the preceding sections, we can use Struct to create more complex provable types. Struct is a generic function that takes a configuration of properties and types that returns a class with the same properties and types. The struct is always provable, but the types in the configuration must also be provable.

class Vote extends Struct({
  hasVoted: Bool,
  inFavor: Bool,
}) {
  static default() {
    return new Vote({ hasVoted: Bool(false), inFavor: Bool(false) });
  }
}

class Voter extends Struct({
  publicKey: PublicKey,
  vote: Vote,
}) {}

// Example usage
const voter = new Voter({
  publicKey: PrivateKey.random().toPublicKey(),
  vote: Vote.default(),
});

// set vote
voter.vote.hasVoted = Bool(true);
voter.vote.inFavor = Bool(true);

Read more at the language reference: Struct.