Fix.java

File origi = new File("C:\\Users\\Leonardo\\Documents\\Servers\\Eraldia\\plugins\\dtlTraders.jar");
File jarFile = new File("C:\\Users\\Leonardo\\Documents\\Servers\\Eraldia\\plugins\\dtlTraders-patched.jar");

java.nio.file.Files.copy(origi.toPath(), jarFile.toPath(), StandardCopyOption.REPLACE_EXISTING);

File patchedDir = new File("C:\\Users\\Leonardo\\Documents\\Servers\\Eraldia\\plugins\\patched");
patchedDir.mkdir();


JarFile jar = new JarFile(jarFile);
jar.stream().forEach(entry -> {
  if (entry.getName().endsWith("/Trader.class")) {
    try {
      InputStream input = jar.getInputStream(entry);
      ClassReader cr = new ClassReader(input);
      ClassWriter cw = new ClassWriter(0);
      cr.accept(new ClassVisitor(ASM5, cw) {
        @Override
        public MethodVisitor visitMethod(int access, String name, String desc, String signature, String[] exceptions) {
          MethodVisitor def = super.visitMethod(access, name, desc, signature, exceptions);
          if (name.equals("transactionEvent")) {
            return new MethodVisitor(ASM5, def) {
              @Override
              public void visitFieldInsn(int opcode, String owner, String name, String desc) {
                if (opcode == GETSTATIC && name.equals("INVENTORY_FULL")) {
                  super.visitVarInsn(ALOAD, 1);
                  return;
                }
                super.visitFieldInsn(opcode, owner, name, desc);
              }
            };
          }
          return def;
        }
      }, 0);


      File classFile = new File(patchedDir, entry.getName());
      classFile.getParentFile().mkdirs();

      byte[] bytecode = cw.toByteArray();
      Files.write(bytecode, classFile);
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
});