Can I send 100 rose to a contract while hiding the fact that is was 100 rose? Meaning that the amount of rose my address has, and the amount of rose the contract has, and the amount of rose the transaction has are all hidden? I was testing a basic contract on testnet with a very simple deposit and withdraw function and the transaction/user/contract amounts were visible throughout.
Rose by default is entirely public on Sapphire. In order to do this you would need to create a wrapping contract which hides this transaction data.