Sui's Hashi Bitcoin lending protocol recorded more than 1.1 million Bitcoin deposit transactions and 165,000 withdrawals within three weeks of its July 22 testnet debut, underscoring early throughput for a system designed to bring native Bitcoin into on-chain lending and stablecoin borrowing. More than 25 institutions had joined the stress test by last week, including digital asset custodian BitGo, trading firm Cumberland, Swissborg, Fluid and Ledger, spanning trading, custody infrastructure and wealth management platforms. The protocol lets users deposit native Bitcoin, after which Sui validators verify the transaction and mint hBTC for use in lending markets. Deposits rely on MPC (multi-party computation) validator signatures through a 2-of-2 multisignature arrangement, while withdrawals must pass review by the Guardian Layer security system before release. The project plans to proceed with a 2026 mainnet launch once that security review process is completed.