Hubble is a decentralized finance (DeFi) protocol that distributes fees, built on Solana. As DeFi grows and develops, Hubble intends to provide a range of DeFi products through the protocol.

Hubble starts in Phase 1 by concentrating on borrowing and issuing USDH. Users can supply several crypto assets, including SOL, BTC, ETH, and more, to borrow as much as 90.9% LTV in USDH. During the borrowing process, users can also generate yield from their deposits.

To support these loans, Hubble uses a Stability Pool funded by USDH deposits. Stability Pool participants cover bad loans, and they receive roughly the ~10% differential from liquidated assets. Separately, users who place USDH into the Stability Pool can earn HBB, Hubble's governance token.

HBB holders can stake their tokens on Hubble to receive protocol fees. Later, HBB will also be used for voting on enhancement proposals as the governance token for Hubble DAO.

By staking HBB, users receive 85% of the revenue generated by the Hubble Protocol from its services.

At first, that revenue is expected to come from a 0.5% fee for minting USDH and a 0.5% fee for redeeming USDH for collateral. As the platform broadens, HBB stakers will gain access to additional revenue sources.