It’s because most platforms have a structural flaw: interest rates.
They spike when demand goes up.
They crash when demand drops.
The result? Borrowers get liquidated.
Here’s how we fixed that 
WeissFi, a decentralized borrowing system live on Sui. It introduces a different model from most on-chain lending platforms, and aims to solve a fundamental issue with how borrowing typically works in DeFi.
What WeissFi does differently?
Most borrowing platforms adjust interest rates with volatile market curves — making it impossible to plan long-term.
WeissFi removes that entirely.
No interest rate curve. No auto-adjusting APRs. No governance tweaks.
Instead, you set your own fixed rate when you borrow.
You deposit $SUI as collateral and mint $DORI, our native stablecoin — all on your terms.
What balances the system?
So what’s stopping everyone from just borrowing at the lowest possible rate — like 0.5%?
That’s where redemptions come in:
- If you choose an unrealistically low rate, your vault becomes more likely to be redeemed when $DORI depegs.
- During a redemption, another user can repay part of your debt (at par) in exchange for a slice of your $SUI collateral.
- This creates a natural incentive to set fair interest rates, without needing governance or centralized control.
It’s a similar mechanism to what Liquity V2 does with “voluntary” interest rates and redemptions.
Stability Pool & Liquidations
To support this, WeissFi includes a Stability Pool:
- Users can stake $DORI to absorb liquidations and earn from interest payments.
- In return, they receive yield from the seized collateral and protocol incentives.
Key design principles
WeissFi is heavily inspired by Liquity V2 and follows some core principles:
Immutable vault logic
What’s different is that we’ve tailored the model to Sui’s architecture: low latency, native object system, and Move-based smart contracts.
Why we built it
Too often, borrowers in DeFi get blindsided by protocol-level changes: a parameter tweak, an interest rate hike, or a governance vote they didn’t even see.
We wanted to build a protocol that:
- Makes borrowing predictable
- Removes the need for constant monitoring
- Gives users long-term control over their positions
Try it out
We’re live on mainnet. You can:
- Open a vault with $SUI
- Mint $DORI
- Set your own interest rate
- Stake in the Stability Pool
Would love to hear your thoughts — feedback, questions, ideas for integrations.