How Does Sovryn Zero Work?
Sovryn Zero is a Bitcoin-native CDP protocol on Rootstock (RSK) that lets users borrow ZUSD stablecoins against BTC collateral with zero interest and a one-time 5% origination fee. With $23M in TVL and a Liquity-based design, its B grade reflects the proven CDP architecture offset by Rootstock infrastructure risk and limited stablecoin utility outside the Sovryn ecosystem.
TVL
$24M
Sector
CDP
Risk Grade
B
Value Grade
D
Core Mechanisms
6.1.1
Liquity-style CDP for ZUSD/DLLR minting against BTC (RBTC) collateral with 110% minimum ratio
Standard Liquity fork adapted for Bitcoin via Rootstock; uses RBTC (BTC on RSK) as collateral to mint ZUSD or DLLR stablecoins
6.3.2
Stability pool for ZUSD liquidation absorption with RBTC discount
Standard Liquity stability pool where ZUSD depositors absorb liquidations and receive discounted RBTC collateral
2.1.1
One-time 5% origination fee on ZUSD borrowing (zero ongoing interest)
Standard Liquity-style one-time fee model; 0% interest with upfront origination fee
6.4.1
Oracle price feeds for BTC/USD on Rootstock
Standard oracle integration for RBTC collateral valuation on RSK
5.1.1
SOV token governance for Sovryn protocol parameters
Standard token-weighted governance; SOV stakers govern protocol direction
How the Pieces Interact
RBTC is a federated peg token representing BTC on RSK; if the RSK federation bridge is compromised, RBTC could depeg from BTC, making all Sovryn Zero collateral effectively worthless
Thin liquidation infrastructure on RSK means liquidations may be slower than on Ethereum, and the 110% collateral ratio provides minimal buffer if prices move faster than liquidators can act
ZUSD has limited utility outside Sovryn's DEX and lending products on RSK; peg stability depends heavily on the Sovryn ecosystem's health and trading volume
High origination fee may incentivize users to maximize loan duration to amortize the cost, leading to stale positions that accumulate during price declines
What Could Go Wrong
- Sovryn Zero operates on Rootstock (RSK), a Bitcoin sidechain with a federated peg and smaller validator set compared to Ethereum, introducing infrastructure-level centralization risk.
- The 110% minimum collateral ratio provides minimal buffer during sharp BTC price declines, and liquidation infrastructure on RSK may be thinner than on Ethereum where Liquity originally operates.
- ZUSD stablecoin has limited use cases outside the Sovryn ecosystem, creating liquidity concentration and potential peg fragility if the primary Sovryn DEX experiences issues.
- The 5% origination fee is significantly higher than many competing CDP protocols, which may push users toward riskier alternatives or incentivize behavior to minimize fee impact.
RSK Bridge Compromise with RBTC Depeg
TailTrigger: RSK federation bridge is compromised or experiences a critical bug that causes RBTC to depeg from BTC by >5%
- 1.RSK federation bridge vulnerability is exploited or federation signers are compromised — RBTC peg to BTC weakens as market confidence in the bridge drops
- 2.RBTC price diverges from BTC price on secondary markets — All Sovryn Zero collateral (RBTC) becomes worth less than its BTC-denominated oracle price, creating false collateral adequacy
- 3.If oracles update to reflect RBTC discount, mass liquidations are triggered — Stability pool absorbs RBTC at discounted value; ZUSD backing deteriorates
- 4.ZUSD holders lose confidence and attempt to exit — ZUSD depegs from USD as the entire collateral base (RBTC) is impaired
Risk Profile at a Glance
Overall: B (26/100)
Lower score = safer