Deep Dive
1. Protocol 23 “Whisk” Upgrade (5 September 2025)
Overview: Protocol 23 introduced parallel execution of Soroban smart contracts, reducing latency and boosting throughput to ~5,000 TPS. It also standardized event logging across assets and contracts.
Key technical changes:
- Parallel transaction processing via a new transaction set structure, cutting cross-contract call costs by ~40%.
- Unified asset events (CAP-67) enable real-time tracking of all token movements, improving dApp transparency.
- State archival moves Soroban’s live state to RAM, reducing gas fees by ~30% for common operations.
What this means: This is bullish for XLM because faster, cheaper transactions enhance Stellar’s competitiveness in DeFi and enterprise tokenization. Developers can build more complex apps without hitting throughput ceilings.
(PaulGoldEagle)
2. Zero-Knowledge Privacy Prep (24 November 2025)
Overview: Stellar announced Protocol X-Ray, introducing native BN254 curve and Poseidon hash support to simplify ZK-proof integration for confidential transactions.
Key details:
- Testnet launch: 7 January 2026; Mainnet targeted for 22 January 2026.
- Reduces ZK app gas costs by ~60% compared to Ethereum-based implementations.
- Partners like Nethermind are building bridges to Ethereum’s proof standards.
What this means: This is neutral-to-bullish as it positions Stellar for institutional privacy demands, but adoption depends on developer uptake. Users could eventually transact privately while complying with regulations.
(StellarOrg)
3. Java SDK Protocol 23 Support (29 July 2025)
Overview: The Java SDK v23.1.1 added Protocol 23 compatibility, including message signing/verification and liquidity pool APIs.
Notable updates:
- PollTransaction method: Retry logic for transaction status checks.
- Muxed account support: Streamlined handling of multiplexed addresses.
- Deprecated Horizon fields removed (e.g., numArchivedContracts).
What this means: This is neutral for XLM but critical for developer experience. Enterprises can integrate Stellar more smoothly, particularly for high-volume payment systems.
(GitHub)
Conclusion
Stellar’s Protocol 23 and upcoming ZK upgrades signal a strategic shift toward high-throughput DeFi and regulated privacy. While recent updates solidify its infrastructure for real-world assets, the network’s next challenge is driving adoption of these tools. Will Protocol X-Ray’s privacy features attract institutional flows in 2026?