Riddle/src/lib/SolutionEnvelope.vala

namespace Riddle {


    public class SolutionEnvelope {

        public string identifier { get; set; }
        public uint8[] signed_data { get; set; }
        public uint8[] signed_reply_key { get; set; }

        public SolutionEnvelope.from_message(Message message) {
            
            identifier = message.arguments[0];
            
            signed_data = Base64.decode (message.items[0]);
            signed_reply_key = Base64.decode (message.items[1]);
        }

        public bool verify(uint8[] verification_key) {
            var d1 = Sodium.Asymmetric.Signing.verify(signed_data, verification_key);
            var d2 = Sodium.Asymmetric.Signing.verify(signed_reply_key, verification_key);
            return d1 != null && d2 != null;
        }

        public Message to_message() {
            return new Message(MessageType.RIDDLE, 
                new string[] {
                    identifier
                },
                new string[] {
                    identifier,
                    Base64.encode(signed_data),
                    Base64.encode(signed_reply_key)
                }
            );
        }

    }

}