A casino lobby may look like one screen, but it connects separate systems:...

https://tango-wiki.win/index.php/Casino_Account_Records_vs._Blockchain_Transactions:_What%E2%80%99s_Different%3F

A casino lobby may look like one screen, but it connects separate systems: provider integrations load games, while balance records track bets and wins. Those links need to stay in sync, even when a game loads slowly or a payment is still pending.