Stellar Unveils Developer Preview of Private Payments Tool

Stellar has unveiled the developer preview of its Private Payments tool, built by Nethermind. The testnet is now live and open to developers who want to explore its capabilities before a potential mainnet rollout.

The core innovation behind Stellar's SPP (Stellar Private Payments) lies in its use of privacy pools. Users can deposit funds into a shared pool, where transactions occur privately. On the public ledger, only the pool activity is visible, while the identities of counterparties and transaction amounts remain hidden.

SPP uses a zero-knowledge proof system to ensure transactions remain private while maintaining compliance. When funds are deposited into the pool, they generate cryptographic commitments stored in a Merkle tree. Transfers within the pool spend these commitments and create new ones, while a nullifier ensures no double-spending.