July twenty second, 2026 – Grand Cayman, Cayman Islands
New builders and 25+ companions can now start testing the much-anticipated Bitcoin infrastructure forward of mainnet, powered by Sui’s high-performance community and Hashi’s novel safety mechanism, the Guardian Layer.
Sui, the place cash strikes as freely as messages, immediately introduced that Hashi testnet has formally launched, giving builders, establishments, and infrastructure suppliers the chance to develop and combine Bitcoin-backed monetary functions forward of mainnet.
Bitcoin has confirmed itself because the world’s premier digital retailer of worth, amassing over a $1 trillion market cap on that use case alone. Its subsequent chapter will likely be outlined by utility. With Hashi testnet now stay on Sui, this marks an vital milestone in Bitcoin’s crucial evolution, giving builders, custodians, monetary establishments, and ecosystem companions their first alternative to construct, combine, and stress-test Bitcoin-backed monetary functions forward of mainnet.
Alongside immediately’s launch, Hashi introduces the Guardian Layer, a brand new defense-in-depth safety structure purpose-built to assist establishments securely handle Bitcoin collateral whereas preserving the transparency and programmability of onchain finance. The Guardian Layer offers Bitcoin the protection it must lastly go on offense, serving to unlock lending, credit score, yield methods, and a brand new era of institutional monetary merchandise on Sui.
Whereas institutional adoption has accelerated by means of spot ETFs, company treasury methods, and increasing regulatory readability, greater than a trillion {dollars} of Bitcoin stays largely dormant. The infrastructure to soundly deploy native BTC into clear, programmable credit score markets has merely not existed. Simply as importantly, establishments have lacked confidence that shifting native BTC into onchain markets might be finished with out triggering pointless tax penalties. Fenwick, one of many foremost regulation companies in digital property, concluded that Hashi’s deposit and redemption mechanics shouldn’t represent taxable occasions beneath U.S. tax regulation.
Hashi testnet is the start of the ecosystem buildout that may in the end energy institutional Bitcoin lending, borrowing, and credit score origination on Sui. From custody suppliers and pockets infrastructure to lending protocols and capital markets members, builders can now start validating integrations, testing operational workflows, and getting ready production-ready functions earlier than Hashi reaches mainnet.
Developer SDK documentation, an integration information, and technical sources can be found immediately on sui.io/hashi to assist builders start instantly.
“Each main asset class ultimately develops deep credit score, lending, and liquidity markets,” mentioned Adeniyi Abiodun, Co-Founder and Chief Product Officer of Mysten Labs, the unique contributor to Sui. “Bitcoin isn’t any totally different. Hashi is giving builders the infrastructure to construct these markets onchain with the safety, transparency, and programmability establishments have been ready for.”
Including Protection: Hashi’s Guardian Layer
A key part of the protocol, unveiled for the primary time immediately, is the Guardian Layer, a further safety mechanism designed to assist safe collateral motion and huge transactions. The Guardian Layer introduces configurable safeguards that may gradual or forestall probably malicious exercise earlier than collateral leaves the system, serving to establishments handle operational threat whereas sustaining the transparency of onchain markets.
All BTC collateral (or UTXOs) are secured with a 2-of-2 multisig requiring an MPC signature from the Hashi validators in addition to a signature from the guardian, creating a further layer of safety in opposition to malicious exercise.
These protections, that are a prerequisite to significant institutional participation, complement the broader structure launched earlier this yr, together with automated collateral administration, verifiable mortgage phrases, and full onchain visibility into collateral well being.
Increasing the Institutional Ecosystem
As Hashi enters testnet, the ecosystem continues to develop with strategic companions spanning DeFi, banking infrastructure, and capital markets. Wave Digital Property is deepening its dedication to Hashi after first saying assist throughout devnet. As an institutional supervisor, Wave has dedicated to a few years of finest efforts to prioritize the tokenization of Bitcoin-yield-bearing bond merchandise on the Sui protocol using Hashi, reinforcing its conviction that programmable Bitcoin fixed-income markets are prepared for institutional adoption.
Hashi’s World-Class Launch Companions
These developments fortify an ecosystem that already contains a lot of crypto’s main custodians, liquidity suppliers, pockets suppliers, DeFi protocols, insurance coverage suppliers, and infrastructure firms.
When devnet was introduced earlier this yr, over 20 day-one launch companions had already dedicated to constructing and deploying capital on Hashi, together with a number of of crypto’s heavyweights.
Custody & Pockets Entry
- BitGo: Institutional custody purchasers.
- Blockdaemon, Cobo, Fordefi (by Paxos): Institutional pockets and infrastructure suppliers.
- Cubist: Cross-chain collateral infrastructure and switch engine.
- Ledger: Retail/institutional self-custody.
- SwissBorg: UHNW European retail/institutional asset administration and pockets interface.
Lending, Buying and selling & Liquidity Suppliers
- Bullish: Institutional digital asset platform supplying liquidity.
- Cumberland: Main institutional crypto market maker and liquidity supplier.
- Erebor: OCC-chartered financial institution offering liquidity.
- FalconX: Institutional prime brokerage supplying liquidity.
DeFi & Lending Purposes
- AlphaLend, Bluefin, Present, Scallop, Suilend: Native DeFi protocols enabling retail lending and borrowing on day one.
- Fluid: Connecting lending, borrowing, liquidity and extra monetary merchandise right into a capital-efficient system.
- Navi: One in every of Sui’s largest and longest working DeFi protocols slated for Hashi lending.
Vaults & Asset Administration
- Concrete by Blueprint Finance: Yield-infrastructure vault platform.
- Inveniam Capital: Actual-World Asset (RWA) yield methods.
- Wave Digital Property LLC: SEC-registered funding adviser working with business companions to facilitate the issuance of Bitcoin-collateralized bonds.
Index Oracle, Insurance coverage & Safety Auditing
- CF Benchmarks: Crypto index supplier distributing pricing knowledge by way of oracles.
- Soter Insure: Native, Bitcoin-denominated institutional insurance coverage.
- Asymptotic, Certora, OtterSec: Sensible contract safety and formal verification auditors.
Beginning immediately, builders can construct. Establishments can combine. Infrastructure suppliers can deploy. Collectively, they may also help form the monetary system Bitcoin has been ready for. A system the place the world’s largest digital asset turns into one of many world’s most efficient types of collateral.
Technical documentation and testnet entry configurations are hosted at https://www.sui.io/hashi.
About Sui
Sui, the place cash strikes as freely as messages, is a next-generation Layer 1 blockchain constructed for scalable finance and international funds. Based by the core crew behind Meta’s stablecoin initiative and powered by an object-centric mannequin, Sui makes property, permissions, and person knowledge programmable and ownable. Sui’s primitives supply builders every thing they should create high-performance funds and monetary functions, together with instantaneous agentic funds. Customers can study extra at sui.io.
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