The Stellar Development Foundation introduced Bell, designated as Protocol 30 and the next Stellar upgrade. The description lists three changes: multiplexed addresses of contracts for smart accounts, post-quantum signature verification in smart contracts, and millisecond time measurement in the ledger.

The practical significance of these changes cannot yet be fully assessed: the available source provides no details on update mechanics, activation timelines, or affected applications. The material points to the direction of Stellar's infrastructure development but does not independently confirm the scale or consequences of deployment.