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SmartTokenLabs / attestation

Paper and implementation of blockchain attestations
MIT License
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Help needed to generate MagicLinks #242

Closed oleggrib closed 2 years ago

oleggrib commented 2 years ago

my steps:

then: (console input/output)

olehhryb@ libs % java -version
java version "1.8.0_321"
Java(TM) SE Runtime Environment (build 1.8.0_321-b07)
Java HotSpot(TM) 64-Bit Server VM (build 25.321-b07, mixed mode)
olehhryb@ libs % node -v
v16.14.2
olehhryb@ libs % java -cp ./attestation-0.3.16-all.jar org.devcon.ticket.Issuer ./key.pem oleg@oleg.com 11 22 33
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/devcon/ticket/Issuer has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
  at java.lang.ClassLoader.defineClass1(Native Method)
  at java.lang.ClassLoader.defineClass(ClassLoader.java:756)
  at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
  at java.net.URLClassLoader.defineClass(URLClassLoader.java:473)
  at java.net.URLClassLoader.access$100(URLClassLoader.java:74)
  at java.net.URLClassLoader$1.run(URLClassLoader.java:369)
  at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
  at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
  at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
  at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:601)

@jot2re , can you help me to solve issue and generate MagicLink?

jot2re commented 2 years ago

I think the issue is that you are using Java 8, the code needs at least Java 11 and also seems to have been compiled with a java compiler of at least version 11. You need to change the java runtime version. If you use Windows then there is a guide here

oleggrib commented 2 years ago

thank you, it works great. I just have to update negotiator to support new ticket format.