Key Takeaways:
Mysten Labs' Hashi framework will let Bitcoin holders deploy native collateral in Sui-based DeFi protocols without synthetic wrappers, with a global testnet scheduled for July 2026.
Mysten Labs' Hashi framework secured backing from five institutional partners — SwissBorg, Cumberland, Fluid, BitGo and Ledger — to bring native Bitcoin collateral into Sui DeFi without synthetic wrappers, with a global testnet expected in July 2026.
"Bitcoin is the most liquid digital asset, yet its DeFi utility has been constrained by wrapped tokens that introduce counterparty risk," a representative familiar with the project said. "Hashi eliminates that layer by enabling native BTC collateral directly on Sui."
The Hashi framework allows Bitcoin holders to use their native BTC as collateral in Sui-based lending, borrowing and yield protocols without first converting to a bridged representation such as WBTC on Ethereum or BTCB on BNB Chain. Sui's total value locked stood at roughly $1.2 billion across DeFi protocols as of late June, according to DefiLlama data, a fraction of the $90 billion-plus locked across Ethereum and its layer-2 networks. Unlocking even a portion of Bitcoin's $1.1 trillion market cap for Sui DeFi could meaningfully expand the network's addressable liquidity.
The July 2026 testnet timeline gives Mysten Labs roughly 12 months to complete security audits, integrate with partner custody providers and demonstrate the framework's reliability before mainnet deployment. BitGo and Ledger's involvement suggests a custody-first approach, with institutional-grade key management built into the bridge architecture. SwissBorg and Cumberland's participation points to potential market-making and liquidity provisioning once the bridge goes live.
What the institutional lineup signals about Hashi's design
The five backers span distinct segments of crypto infrastructure. SwissBorg operates a wealth-management platform focused on retail and accredited investors. Cumberland is a proprietary trading desk and liquidity provider. Fluid provides staking infrastructure. BitGo offers qualified custody, and Ledger supplies hardware wallet security. The diversity suggests Hashi is being designed to accommodate multiple access points — from retail-facing apps to institutional trading desks.
Why this matters for Sui and Bitcoin DeFi
Sui, a layer-1 blockchain built on the Move programming language, has been competing for DeFi market share against established chains such as Ethereum, Solana and Avalanche. A native Bitcoin bridge would differentiate Sui from competitors that rely on wrapped Bitcoin variants, which carry custodial and smart-contract risks. For Bitcoin holders, the framework offers a path to yield generation without relinquishing self-custody to a centralized bridge operator — provided the security architecture holds up under audit.
The next milestone to watch is the testnet launch in July 2026, followed by third-party security reviews and integration timelines from the five institutional partners. If Hashi passes those gates, Sui could become one of the first chains to offer native Bitcoin collateral at scale — a development that would test whether Bitcoin DeFi demand extends beyond the wrapped-token model that has dominated since 2020.
This article is for informational purposes only and does not constitute investment advice.
