Design Rationale
Lucent uses a Liquity v2-style model because it is a mature pattern for decentralized overcollateralized stablecoins that can adapt to market conditions without direct rate-setting by governance.
Its core mechanisms are user-selected fixed interest rates, redemption ordering by interest rate, and protocol interest flowing back to stablecoin demand venues.
Market-Set Rates
Borrowers choose rates based on the tradeoff between borrowing cost and redemption risk. If rates are too low and starUSD supply exceeds demand, redemptions target the lowest-rate debt first. This raises the effective system rate and reduces supply.
Unlike utilization-based lending markets, the rate is not set by a pool utilization curve. It is set by borrower competition and stablecoin peg pressure.
Fixed-Rate Open-Term Borrowing
Lucent targets XLM holders and future collateral holders who want predictable USD credit without rate spikes.
The model provides:
- Predictable borrow rates.
- Repayment at any time.
- Fixed-rate looping and yield strategies.
- Reduced liquidation risk from sudden utilization-rate jumps.
Positive Rate Spread
Borrower interest can flow to starUSD holders through the Stability Pool, DEX liquidity incentives, and other yield venues. That means starUSD demand can be funded by protocol revenue rather than governance token emissions.
As starUSD demand grows and the peg strengthens, redemption risk falls and borrowers can select lower rates. This creates a feedback loop between borrow demand, starUSD liquidity, peg strength, and sustainable yield.
Lucent Improvements
Lucent is not a direct Liquity v2 copy. It adapts the design based on Ebisu operating experience and Stellar market structure.
| Improvement | Reason |
|---|---|
| Configurable interest routing | Early starUSD liquidity may need more DEX incentives, while mature markets may route more to Stability Pool or reserves. |
| JIT liquidation | Liquidation liquidity can be sourced when needed, reducing reliance on a large idle Stability Pool. |
| Shared Stability Pool | Future collateral branches can use one starUSD pool instead of fragmenting liquidity by collateral type. |
| Per-collateral minimum rates | Riskier collateral types can require higher minimum borrower rates. |
Growth Priorities
Lucent growth depends on:
- Deep starUSD-USDC DEX liquidity.
- Organic demand sinks for starUSD.
- XLM borrowers seeking cheaper fixed-rate USD credit.
- Integration into Stellar lending, DEX, yield trading, perp, and agent-payment venues.
- Incentive reduction as unincentivized demand, peg resilience, and protocol revenue improve.