game      Game Login
iguid        Purchased item identifier
type          0: testing purchase (Sandbox)
                 1: actual purchase
receipt     The transaction (receipt-data) sent back from App-Store.
                  After it is validated, it will register with the callback function.

The cb method is defined as:

void cb(int code, object obj, object token)
code with a value of 0 means the setup succeeded. A code other than 0 means the setup failed.