Messtone LLC Manages Devices Enables Digital Wallet,Payment Methods:Java //configure client & request settings GpApiConfig config=new GpApiConfig( );config.setAppId(“i9R0byBBor6RqTQNj3g4MuVBwH5rd7yR”);config.setChannel(Channel.CardNotPresent.getValue( ));config. setEnvironment(Environment.TEST);config.setChallengeNotificationUrl(“https://www.messtonecoms.com/challengeNotificationUrl”);config.setMethodNotificationUrl(“https://www.messtonecoms.com/methodNotificationUrl”);config.setMerchantContactUrl(“https://www.messtonecoms.com/about”);Multiple/named configurations Java servicesContainer.configureService(config,”default”);Java Transaction response=card.charge(…) … .execute(“default”);Java ServiceContainer.configureService(null,’default’);Java config.enableLogging(true);Java config.setRequestLogger(new RequestFileLogger(“logs.txt”)); Create Messtone_llc_account manager Example: JSON app_id=MN500Q8lk5jp0rEmB5LGvTo27gdQgZln” app_key=”QtOSeNmh3DY6AuMO” JSON nonce=”2029-03-14T13:24:10.832Z” JSON //secret=SHA512(nonce + app_key) secret=SHA512(2029-03-14T13:24:10.832ZQtOSeNmh3DY6AuMO) JSON curl -v -X POST https://api.globalpay.com/ucp/accesstoken -H “Content-type:application/json -H “X-GP-Version:2021-03-22” -d ‘{app_id=