The Stellar network has successfully activated its Protocol 28 upgrade, a critical update designed to enhance smart contract capabilities and bolster network performance. The mainnet upgrade, codenamed “Adapter,” was confirmed following a validator vote on September 16, 2026, and rolled out as the network is experiencing unprecedented growth in transaction volume and the tokenization of real-world assets (RWAs).
This move by the Stellar Development Foundation (SDF) introduces significant new tools for developers building on the Soroban smart contract platform. It comes at a pivotal moment, with on-chain financial activity surging and institutional interest from major players like the Depository Trust & Clearing Corporation (DTCC) and U.S. Bank.
Stellar Protocol 28: A technical overhaul for a growing ecosystem
This underscores the need for a more robust and scalable infrastructure. The upgrade aims to directly address the complexities of managing large-scale financial applications on the blockchain.
Protocol 28 is not a minor patch; it’s a foundational enhancement comprising three key Stellar Core Advancement Proposals (CAPs). These changes are engineered to improve everything from smart contract maintenance to the core consensus mechanism.
It reflects a proactive approach to scaling that other networks have also faced. Learning how Solana overcame its early network challenges provides a useful parallel for the types of growing pains that necessitate such upgrades.
The technical improvements are arriving just as Stellar sets new performance benchmarks. In the weeks leading up to the upgrade, the network processed a record of over 11.1 million transactions in a single day. Stellar’s theoretical maximum throughput stands at 3,351 transactions per second (TPS), a 65% increase over its previous ceiling, a benchmark reviewed by Chainspect.
CAP-85: Atomic upgrades for contract fleets
One of the most significant changes for developers is CAP-85, which introduces atomic upgrades for groups of smart contracts. Previously, updating applications that relied on multiple instances of the same contract was a complex and potentially risky process.
Each instance would need to be updated individually, creating a window where different versions of the code could be active simultaneously. CAP-85 solves this by allowing developers to have their contracts reference an externally managed executable file. By updating this single shared reference, every participating contract is moved to the new code in one single, atomic operation.
This dramatically simplifies maintenance and enhances security, a crucial feature for protocols managing billions of dollars in assets. However, adoption remains optional, meaning existing Soroban applications must choose to implement this new architecture.
CAP-86: Flexible data for evolving applications
Another challenge for long-term projects is data management. As an application matures, its developers may need to alter the structure of the data stored within its smart contracts. CAP-86 addresses this by introducing new sparse-map functions that can gracefully handle missing or additional fields in contract data.
This allows for progressive data migration and safe schema evolution over time. Developers can now modify data structures without requiring all existing records to conform to a new schema immediately.
This flexibility is vital for the long-term viability of complex applications, particularly in the ever-changing world of decentralized finance and tokenized assets.
CAP-83: Faster consensus under heavy load
The final core component, CAP-83, is designed to make the Stellar Consensus Protocol more efficient when the network is busy. It allows validators to begin the voting process even if they have not received the full transaction set for a given ledger.
The protocol also provides a mechanism to discard late or invalid transaction sets, preventing them from slowing down the network. CAP-83 provides the underlying framework to support even higher loads as other performance-enhancing features are rolled out.
This is part of a multi-year effort by the Stellar Development Foundation (SDF) to push Stellar’s theoretical throughput towards 5,000 TPS. This figure would place it among the fastest public blockchains. Such performance metrics are a key battleground, with feats like the recent XRP Ledger transaction record highlighting the industry’s focus on speed and scalability.
Surging RWA value drives the need for scale
The urgency behind Protocol 28 becomes clear when looking at Stellar’s explosive growth in 2026, particularly in the real-world asset sector. As of late August, the value of tokenized RWAs on the network had reached nearly $4 billion, a staggering increase of approximately 360% from the $868.8 million recorded at the end of 2025.
The network flew past several milestones this year, crossing $1 billion in RWA value in January, $2 billion in April, and $3 billion in June before hitting the $4 billion mark by early September. This growth is not from a single source but a diverse ecosystem of issuers.
Spiko is the largest, contributing over $1.55 billion. Other major players include Realiz ($559 million), Tradable ($548 million), and asset management giant Franklin Templeton ($546 million).
Beyond corporate assets, tokenized non-U.S. government debt has also found a home on Stellar, with approximately $490 million in assets like Mexican CETES and Brazilian government bonds. This rapid expansion in tokenized real-world assets demonstrates a growing intersection between blockchain technology and traditional financial markets.
The need for robust infrastructure becomes paramount as these markets converge. Observing Bitcoin Hashrate Trends also reveals how market dynamics influence network infrastructure and security perceptions.
Institutional adoption solidifies Stellar’s position
The Protocol 28 upgrade is also a clear signal to the major financial institutions that have chosen to build on Stellar. These partners require a network that is not only fast and cheap but also secure, reliable, and enterprise-ready. This upgrade directly addresses the operational needs of managing financial products at scale.
Perhaps the most significant future integration is with the Depository Trust & Clearing Corporation (DTCC), which plans to bring its tokenization services to Stellar. The launch of DTC tokenized assets is expected in the first half of 2027.
These assets could include U.S. Treasuries and major index ETFs, potentially bringing trillions of dollars in value closer to the network. Laying a more scalable foundation now is critical preparation for that future.
This follows several other high-profile adoptions. U.S. Bank recently conducted a successful cross-border payment pilot on Stellar using a bank-issued stablecoin. Global payment firm MoneyGram also launched its MGUSD stablecoin on the network.
Franklin Templeton’s BENJI fund now holds over $654 million in tokenized assets on-chain, and PayPal brought PYUSD to Stellar.
Market outlook and the road ahead
While the technical and financial metrics are strong, the price of Stellar’s native token, XLM, has been more subdued. Following the upgrade’s activation, XLM saw a modest gain, trading around $0.17 with a market capitalization of approximately $6.1 billion.
Analysts note that renewed demand could see the token target the $0.22 level, which would represent a gain of over 26% from its current price.
The true test for Protocol 28 will be its adoption by the developer community. The new features for atomic upgrades and flexible data schemas are powerful, but they are opt-in. Their impact will be measured by how quickly and widely they are implemented by the Soroban projects that are driving the network’s growth.
With the upgrade now live, the Stellar Development Foundation has delivered the infrastructure. The focus now shifts to the ecosystem of builders, issuers, and financial institutions.
How they leverage these new tools will determine whether Protocol 28 becomes the foundation that supports Stellar’s next chapter as a leading platform for tokenized real-world assets.