Resupply Fi — Frequently Asked Questions

Resupply Fi (Resupply) is a decentralized finance (DeFi) protocol that enables users to supply crvUSD and frxUSD as collateral across Curve Lend and Fraxlend markets to borrow reUSD — the protocol's native stablecoin.

The protocol is designed to maximize capital efficiency by letting users earn yield on their supplied collateral while simultaneously borrowing reUSD at low rates. Resupply Fi integrates deeply with the Curve and Frax ecosystems, leveraging their battle-tested lending infrastructure.

Key components of the Resupply Fi ecosystem include:

• Lending Markets — supply crvUSD or frxUSD and borrow reUSD
• Insurance Pool — deposit reUSD to backstop the protocol and earn yield
• sreUSD — savings vault for passive reUSD yield
• Liquidity Pools — RSUP/reUSD pools for liquidity providers
• RSUP Governance — on-chain governance token for protocol decisions

Getting started with Resupply Fi is straightforward:

• Visit resupply.fi and connect your Ethereum wallet (MetaMask, WalletConnect, Coinbase Wallet, etc.).
• Acquire crvUSD or frxUSD — the two supported collateral assets.
• Navigate to the Lending Markets section and select a market that fits your risk profile and desired collateral.
• Deposit your collateral and borrow reUSD against it at a variable APR.
• Use the borrowed reUSD in the Insurance Pool, sreUSD savings vault, or liquidity pools to further earn yield.

Resupply Fi operates on Ethereum mainnet. Make sure you have ETH for gas fees before transacting.

Resupply Fi supports a diverse range of collateral assets across its integrated Curve Lend and Fraxlend markets:

• Fraxlend markets (frxUSD borrowed): WBTC, scrvUSD, sUSDe, sfrxETH
• Curve Lend markets (crvUSD borrowed): sreUSD, sfrxUSD, WETH, WBTC, wstETH, sUSDe

Each market has its own borrowing rate, collateral APR, and maximum net variable APR. Users should review market parameters carefully before supplying collateral, including the liquidation thresholds for each asset.

New markets may be added over time through the Resupply Fi governance process.

reUSD is the native stablecoin of Resupply Fi, soft-pegged to 1 USD. It is minted when users borrow against their crvUSD or frxUSD collateral in supported lending markets.

Resupply Fi maintains the reUSD peg through several mechanisms:

• Insurance Pool: a backstop reserve funded by reUSD depositors that absorbs bad debt.
• Algorithmic interest rates: borrowing costs adjust dynamically to incentivize or discourage borrowing as needed.
• Collateral quality: only high-quality, liquid assets (crvUSD, frxUSD, and their derivatives) are accepted as collateral, minimizing systemic risk.

Because Resupply Fi builds on top of Curve Lend and Fraxlend, their underlying liquidation engines also contribute to collateral safety.

The Resupply Fi Insurance Pool is a smart contract where reUSD holders can deposit their tokens to serve as a backstop for the protocol. In the event of bad debt (e.g., a liquidation shortfall), the Insurance Pool absorbs losses, protecting the solvency of the overall Resupply Fi system.

In return for taking on this risk, Insurance Pool depositors earn yield generated from Resupply Fi borrowing activity and RSUP reward emissions.

The Insurance Pool is an important component of the Resupply Fi risk management framework and is distinct from the sreUSD savings vault, which carries lower risk and lower reward.

sreUSD (Savings reUSD) is a yield-bearing vault offered by Resupply Fi for passive reUSD holders. By depositing reUSD into sreUSD, users automatically earn protocol-generated yield without having to actively manage positions or take on Insurance Pool risk.

sreUSD accrues value over time: the exchange rate of sreUSD to reUSD increases as yield accumulates. It operates similarly to other yield-bearing stablecoins (like DAI's sDAI or Frax's sfrxUSD).

sreUSD can itself be used as collateral in Resupply Fi Curve Lend markets, enabling further composability for advanced users.

RSUP is the governance and revenue-sharing token of Resupply Fi. Its key utilities include:

• On-chain governance: RSUP holders vote on protocol proposals, including fee parameters, new market additions, and treasury allocations.
• Revenue sharing: Staked RSUP (via governance) can earn a portion of Resupply Fi protocol revenues.
• Incentive emissions: RSUP is distributed as rewards to users who supply collateral and borrow reUSD in active lending markets.

RSUP governance is accessible through the Governance section of the Resupply Fi app at resupply.fi/governance. Users can view active proposals, delegate their vote, or vote directly on protocol changes.

As with all DeFi protocols, using Resupply Fi carries inherent risks that users should carefully consider:

• Smart contract risk: despite audits, bugs or exploits in Resupply Fi or underlying protocols (Curve Lend, Fraxlend) could result in loss of funds.
• Liquidation risk: if the value of your collateral falls below the required threshold, your position may be liquidated.
• Stablecoin depeg risk: if crvUSD or frxUSD depegs significantly, collateral values may deteriorate.
• reUSD peg risk: extreme market conditions could temporarily affect the reUSD peg.
• Oracle risk: price feed manipulations could affect liquidation accuracy.

Resupply Fi contracts have been audited by reputable security firms. Always do your own research and never supply more than you can afford to lose.

The borrowing APR in Resupply Fi is composed of two parts shown in the Lending Markets interface:

• Cost: the base borrowing interest rate you pay to borrow reUSD. This rate is algorithmically determined by the underlying Curve Lend or Fraxlend market utilization.
• Rewards: RSUP token rewards you earn for borrowing reUSD, expressed as a variable APR. These rewards offset the borrowing cost.

The Net vAPR displayed is the effective return after subtracting cost from rewards. The Max Net vAPR represents the best-case scenario combining collateral yield and net borrowing rewards at maximum utilization of Resupply Fi incentives.

All APRs shown are variable and will change based on market conditions, utilization rates, and RSUP emission schedules.

Resupply Fi has an active community and comprehensive documentation:

• Docs: docs.resupply.fi — full technical documentation, guides, and protocol architecture.
• Blog: Mirror blog with protocol updates and research articles.
• Governance Forum: gov.resupply.fi — discuss and propose protocol changes.
• Analytics: hippo.army — third-party analytics for Resupply Fi markets.
• GitHub: github.com/resupplyfi/resupply — open-source contracts and code.
• Twitter/X: @Resupplyfi
• Discord: discord.gg/YMg95VHgt5

The Resupply Fi team is transparent and active across all channels. Community governance ensures the protocol evolves in alignment with user interests.