When you tip a creator with crypto, that amount is public forever. So is your rent payment, your salary, your donation: every number sitting next to your address for anyone to scroll. PrivateTip by @claucondor is a ZK demo that hides the amount while leaving the 'who' public. It uses Flow's cross-VM model to pull this off: a single atomic Cadence transaction calls a Groth16 verifier on Flow EVM and updates the shielded balance. Proof-check and balance-update both happen simultaneously.(Flow.com)