Stellar Activates Protocol 28 as Network Hits Record Throughput, RWA Value Surges

Protocol 28 Activation and Technical Upgrades

Stellar’s mainnet transitioned to Protocol 28 on Sept. 17, one day after validators approved the upgrade through a scheduled governance vote. The release delivers two major Capability Improvement Proposals — CAP-85 and CAP-86 — designed to address operational friction that emerges as Soroban smart contract applications scale in complexity and value. Both features are opt-in, requiring developers to explicitly adopt the new architectures within existing or future contracts.

Smart Contract Management Improvements

CAP-85 targets protocols that operate multiple instances of the same smart contract. Previously, updating code across dozens or hundreds of contract instances required individual migrations, creating windows where some contracts ran patched logic while others remained on vulnerable or outdated versions. Under the new model, developers can configure contracts to reference an externally managed executable. Updating that single shared reference moves every participating contract to new code in a single atomic operation, dramatically narrowing the risk surface during security patches or version upgrades.

CAP-86 addresses a parallel challenge: evolving the structure of data already stored by live contracts. As applications mature, schema changes become inevitable — adding fields, deprecating others, or restructuring records. The new sparse-map functions allow contracts to read and write data with missing or additional fields, enabling progressive migration rather than forcing an immediate, all-at-once conformance to a new schema. This reduces downtime risk and complexity for applications managing significant asset volumes.

Consensus Changes and Performance Milestone

Protocol 28 also introduces consensus-layer improvements through CAP-83. The design permits validators to advance through consensus phases without waiting for complete transaction sets to arrive, while providing a mechanism to discard late or invalid sets. This lays groundwork for parallel transaction-set downloading, a feature Stellar is enabling gradually across the network.

The upgrade coincided with a notable performance milestone. Blockchain analysis firm Chainspect reported that Stellar averaged more than 211 transactions per second across 100 consecutive blocks — the highest sustained throughput recorded for the network. However, Stellar’s core development teams have clarified that this peak should not be attributed to Protocol 28 itself. The parallel downloading capability remains in phased rollout, meaning the 211-TPS figure reflects existing infrastructure capacity rather than the newly activated consensus changes. Protocol 28 builds the foundation; the performance gains will materialize as the feature set fully activates.

Growing Financial Activity Raises Operational Stakes

The technical upgrades arrive against a backdrop of accelerating on-chain economic activity. Data from DeFiLlama shows stablecoin supply on Stellar has climbed to nearly $884 million over the past year, positioning the network among the larger chains for dollar-denominated assets. DeFi total value locked followed a similar upward trajectory, peaking at roughly $319 million in August before settling near $294 million.

Tokenized real-world assets represent an even larger footprint. Token Terminal ranks Stellar as the third-largest blockchain by RWA market capitalization at approximately $3.3 billion, a figure that grew by $149.4 million in the preceding 30 days alone. This concentration of value amplifies the practical importance of CAP-85 and CAP-86: applications controlling billions in tokenized assets face significantly higher operational stakes when patching code or migrating data structures, turning these technical features into commercial necessities.

Native token XLM rose roughly 4% in the 24 hours surrounding the activation, reaching $0.1863 before retreating toward $0.18. While the price movement coincided with the upgrade, no causal link has been established between Protocol 28 and the short-term price action.

Why This Matters

Stellar’s trajectory increasingly centers on institutional-grade asset tokenization and stablecoin infrastructure, with major issuers and financial institutions leveraging the network for real-world asset deployment. As the volume and diversity of tokenized assets grow — spanning treasury bills, money market funds, credit instruments, and commodity-backed tokens — the ability to upgrade contract logic and data schemas without service disruption becomes a competitive differentiator. Protocol 28’s opt-in adoption model means the network’s resilience will be tested not by the code’s existence, but by how swiftly major issuers, DeFi protocols, and RWA platforms integrate these capabilities. The coming months will reveal whether Stellar’s developer ecosystem treats these tools as optional enhancements or as foundational infrastructure for the next phase of on-chain finance.