Yona

Yona is a privacy transfer protocol on Solana. Users shield SOL or any SPL token into a privacy pool and receive an off-chain note, while the pool records only commitments rather than depositor addresses. To spend, the client generates a Groth16 zero-knowledge proof locally, and the on-chain program releases funds only after verifying that the commitment matches some balance in the pool, so the recipient address has no direct link to the original deposit. Commitments sit in a sparse Merkle tree using Poseidon hashing over the BN254 curve, which keeps proof generation and verification cheap.

Swaps route through the Jupiter aggregator, so private trades still receive quotes close to market price, and cross-chain flows connect to privacy networks such as Zcash through Near Intents. There is no custodial account and no reliance on a trusted execution environment; every proof is produced on the user's device. Cost per transaction is close to a normal Solana transfer, in the region of 0.001 USD, and the main users are traders who need to hide positions and payment paths, along with teams that do not want payroll flows made public.