The Sui Foundation said Hashi, the network's Bitcoin lending infrastructure, will begin a phased mainnet rollout later in October. The launch coalition spans more than 20 partners, with over $500 million in capital committed across the group. Whether that committed capital converts into usable on-chain liquidity will only become clear once the network is live.

Among the providers expected to operate vaults at launch are Aftermath, Concrete and Fluid. Hashi itself supplies the underlying infrastructure, while independent third parties build the lending, borrowing and other financial products that end users will actually access. For holders, collateralized borrowing offers a way to raise funds in another asset while leaving the Bitcoin deposited rather than sold.

The coalition had already grown before Hashi's July global testnet, when Cumberland, Fluid and SwissBorg joined. Mainnet now moves that preparation into an environment where lenders must supply assets, borrowers must accept terms, and vaults must function under live conditions, according to the Sui Foundation's announcement.

How a Bitcoin Deposit Becomes Sui Collateral

The process starts with a Bitcoin deposit. A user sends BTC to a Bitcoin address generated by Hashi; once the required confirmations and a delay period are complete, the system mints an equivalent amount of hBTC on Sui. That hBTC can then serve as collateral in a lending or other financial application on the network. The deposit-and-mint structure places hBTC in the broader category of Bitcoin-backed tokens, in which an asset issued on one chain represents BTC held on another.

The underlying BTC never leaves the Bitcoin ledger, while hBTC gives the depositor a usable position inside Sui applications. Releasing the deposited BTC requires authorization through Hashi's MPC (multi-party computation) committee and its Guardian layer, according to the project's technical documentation. The design moves control away from a single ordinary wallet and into a shared signing structure.

Membership in the committee is not automatic for the entire validator set: Sui validators must separately register and operate the required services to take part. On withdrawal, the corresponding hBTC is burned on Sui before the committee and Guardian authorize a Bitcoin transaction back to the user's chosen address, less network fees.

##orage Digital Offers Two Access Routes

Once BTC is represented by hBTC, the next question is who can put that collateral to work under their own custody rules, and Anchorage Digital's role addresses that part of the launch.

Institutions do not all operate under the same custody model. A publicly listed company may require regulated collateral arrangements, while a crypto-native fund may prefer to manage its own wallet and interact with applications directly. Anchorage Digital has set out two ways for clients to reach Hashi.

The first is Atlas, Anchorage's settlement and tri-party collateral infrastructure, built for organizations operating under qualified-custody and compliance requirements. Anchorage says assets can remain in qualified custody while being mobilized as collateral. The second is Porto, its institutional self-custody wallet, which offers clients direct access to Hashi and the applications built around it. These options widen the pool of potential participants, though the custody path alone does not establish a loan's rate, collateral ratio or liquidation terms.

$500M Is Committed Capital, Not Live Lending Liquidity

What is confirmed: Hashi says more than $500 million has been committed across its launch coalition. What remains unknown: how much of that reaches mainnet at launch, which assets are supplied to each market, and how much liquidity borrowers can access.

Committed capital does not automatically become borrowable liquidity. A borrower needs lenders to supply the specific asset they want to borrow, whether that is a stablecoin or another token. The Sui Foundation has not published a partner-by-partner allocation or a timetable for deploying the committed funds.

That leaves several practical questions for the first live markets: which assets are available, how much collateral they require, what interest rates apply and how liquidations work when Bitcoin's price falls. The answers will differ between applications, because the financial products are being created by independent providers. Sui says access will expand as launch partners complete their integrations.

The Institutional Case Rests on Post-Launch Terms

Hashi targets holders who want to use Bitcoin without moving it onto another blockchain or abandoning the custody controls that govern their balance sheets. Its mainnet design combines Bitcoin-held collateral, Sui-side hBTC and separate access routes for regulated institutions and self-directed market participants.

For those users, the size of the coalition is only a starting point. Borrowing costs, collateral requirements, withdrawal reliability and stablecoin depth will determine whether Bitcoin-backed finance on Sui becomes a practical treasury tool.

This article is for informational purposes only and does not constitute financial, investment or legal advice. Capital commitments, launch plans and lending terms may change.