July 22, 2026 – Grand Cayman, Cayman Islands
New developers and 25+ partners can now start testing the expected Bitcoin infrastructure ahead of the mainnet, powered by Sui’s advanced network and Hashi’s security mechanism, the Guardian Layer.
Sui, where money flows as freely as information, today announced that the Hashi testnet has been officially launched, giving developers, organizations, and infrastructure providers the opportunity to create and integrate financial services powered by Bitcoin on the front of the mainnet.
Bitcoin has established itself as the ultimate digital store of value, collectibles at a market value of $1 trillion in terms of use itself. His next chapter will be explained with the essentials. With the Hashi testnet now live on Sui, this is an important indicator of the evolution of Bitcoin, giving developers, administrators, financial institutions, and environmental partners their first opportunity to build, integrate, and stress test Bitcoin-backed financial applications ahead of the mainnet.
Along with today’s launch, Hashi is introducing the Guardian Group, a new security-in-depth solution built to help organizations manage Bitcoin collateral and maintain the transparency and stability of the onchain economy. The Guardian Layer provides Bitcoin with the security it needs to continue to thrive, support lending, credit, productivity solutions, and a new generation of institutional financial products on Sui.
Even with increasing institutionalization through ETFs, financial investment strategies, and increasing regulatory clarity, more than a trillion Bitcoins still exist. Infrastructure for the efficient transmission of BTC in transparent, credit-ready markets has never existed. More importantly, organizations lack confidence that moving native BTC to onchain markets can be done without triggering unnecessary tax consequences. Fenwick, one of the leading companies in the digital economy, he finished that Hashi deposit and redemption machines do not constitute taxable transactions under US tax laws.
The Hashi testnet is the start of an ecosystem that supports Bitcoin lending, borrowing, and lending on Sui. From security providers and wallets to lending policies and market participants, developers can now begin verifying integrations, testing functionality, and preparing Hashi-ready applications before they reach the mainnet.
Documentation SDK Documentationand a comprehensive guideand modern equipment available today at sui.io/hash helping builders get started right away.
“Every major financial institution will eventually develop capital, lending, and capital markets,” said Adeniyi Abiodun, Co-Founder and Chief Product Officer of Mysten Labs, which contributed to Sui. “Bitcoin is no different. Hashi provides developers with the tools to build these markets onchain with the security, transparency, and programmability organizations have been waiting for.”
Adding Protection: Hashi’s Guardian Layer
The most important part of the protocol, unveiled for the first time today, is the Guardian Layer, an additional layer of security designed to protect the flow of collateral and key services. The Guardian Layer introduces defenses that can delay or prevent malicious events before they leave the system, helping organizations manage operational risks and maintain transparency in onchain markets.
All BTC (or UTXOs) are protected by a 2-of-2 multisig that requires an MPC signature from the validating Hashi and a signature from the administrator, creating additional protection against malicious activity.
This protection, which is necessary for organizations to participate, supports the architecture that was launched earlier this year, including collateral management, guaranteed credit terms, and full onchain visibility into collateral.
Developing the Institutional Ecosystem
As Hashi joins the testnet, the ecosystem continues to grow with partners taking on DeFi, banking infrastructure, and capital markets. Wave Digital Assets is expanding its commitment to Hashi after announcing the first support on devnet. As an institutional manager, Wave has committed to three years of positive efforts to prioritize the Bitcoin trading token-harvesting on the Sui protocol utilizing Hashi, reinforcing his conviction that programmable Bitcoin stable-currency markets are ready to be implemented.
Hashi’s World-Class Launch Partners
These developments strengthen an ecosystem that already includes leading crypto providers, investors, wallet providers, DeFi protocols, insurance providers, and infrastructure companies.
When devnet was announced earlier this year, on 20 one day Launch partners already committed to building and deploying headquarters on Hashi, including a number of crypto heavyweights.
Custody & Wallet Access
- BitGo: Corporate management clients.
- Blockdaemon, Cobo, Fordefi (by Paxos): Institutional wallet providers and infrastructure.
- Cubists: Cross-chain collateral infrastructure is the engine of change.
- Ledger: Retail/school savings.
- SwissBorg: UHNW European retail/institution asset management and wallet interface.
Borrowers, Trading & Liquidity Providers
- Bullish: Institutional digital asset platform to provide liquidity.
- Cumberland: A leading crypto market developer and funder.
- Erebor: OCC-chartered lending bank.
- FalconX: Institutional prime brokerage provides liquidity.
DeFi & Lending Apps
- AlphaLend, Bluefin, Current, Scallop, Suilend: Native DeFi protocols that support lending and borrowing on day one.
- Water: Consolidate lending, borrowing, financing and other financial products into a more efficient way.
- Navigation: One of Sui’s largest and longest-running DeFi projects planned for Hashi lending.
Vaults & Asset Management
- Concrete and Blueprint Finance: Harvest-infrastructure vault platform.
- Get Capital: Real-World Asset (RWA) provides a means of productivity.
- Wave Digital Assets LLC: An SEC-registered investment advisor is working with partners to facilitate the issuance of Bitcoin-collateralized bonds.
Index Oracle, Insurance & Security Auditing
- CF Benchmarks: Crypto index provider to distribute price data through text.
- Soter Insurance: Native, Bitcoin-denominated institutional insurance.
- Asymptotic, Certora, OtterSec: Smart contract security and certified auditors.
Starting today, developers can build. Organizations can include. Builders can deliver. Together, they can help shape the financial system that Bitcoin has been waiting for. A system in which the world’s largest digital economy becomes one of the world’s largest collateral generators.
Technical documentation and testnet access configurations reside at https://www.sui.io/hashi.
About Sui
Sui, where money flows as freely as messages, is a next-generation Layer 1 blockchain designed for global risk and payment. Sui, founded by the core team of Meta’s stablecoin initiative, creates assets, permissions, and user data to create and own. Sui’s startup offers developers everything they need to create high-quality payments and financial services, including instant payments. Users can learn more at sui.io.
Contact: (email protected)
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Sui Foundation
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