Deep Dive
1. Protocol 23 "Whisk" Upgrade (August 2025)
Overview: Enabled parallel execution of Soroban smart contracts and introduced state archival to reduce memory costs.
Protocol 23’s CAP-62 to CAP-70 proposals overhauled Stellar’s architecture:
- Parallel transactions: Increased throughput to 5,000 TPS by processing contract calls concurrently.
- Unified events: Standardized value-transfer tracking across assets (SEP-41 compliance).
- Cost cuts: Reduced Soroban fees by 40% via reusable Wasm module caching.
What this means: Developers gain enterprise-grade scalability for DeFi/RWA projects while maintaining sub-$0.001 fees. This is bullish for XLM as it cements Stellar’s role in compliant tokenization.
(Stellar Foundation)
2. Java SDK 2.0.0-beta0 (October 2025)
Overview: Enhanced Soroban interaction and security tools for enterprise devs.
Key updates:
- pollTransaction(): Retry logic for tracking Soroban contract status.
- StrKey validators: Added checks for Ed25519 seeds and med25519 keys.
- Muxed accounts: Support for multiplexed addresses in payments.
Breaking changes included Protocol 23 XDR migrations and deprecated Horizon fields.
What this means: Enterprises can build more resilient cross-chain apps, but node operators must update systems. Neutral short-term due to migration effort, bullish long-term for ecosystem flexibility.
(GitHub)
3. Protocol X-Ray (Testnet: Jan 2026)
Overview: Privacy layer adding zero-knowledge proofs to Soroban.
Announced in November 2025, X-Ray introduces:
- BN254/Poseidon curves: Precompiles for SNARK/STARK verification.
- Encrypted memos: Optional privacy for transaction metadata.
What this means: Enables confidential DeFi and compliant private transactions. Bearish for speculative traders (reduced transparency), bullish for institutional adoption.
(Stellar Foundation)
Conclusion
Stellar’s 2025 upgrades prioritize scalability (Protocol 23) and future-proofing for privacy (X-Ray), aligning with its focus on enterprise and regulatory use cases. While recent SDK changes ease Soroban development, the network’s trajectory hinges on how quickly builders adopt these tools.
Could Protocol X-Ray’s ZK features position XLM as a dark horse in CBDC infrastructure?