> For the complete documentation index, see [llms.txt](https://docs.realfi.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.realfi.co/realfi-tokens/susdrf-staked-usdrf.md).

# sUSDrf (staked USDrf)

sUSDrf is RealFi's non-rebasing, return-bearing receipt token (“Efficiency Layer”) that appreciates through discrete weekly staking epochs aligned with borrower repayment schedules, remaining composable across DeFi for trading and collateral purposes. By staking USDrf into the protocol, allocators gain exposure to income generated from a diversified portfolio of real-world assets, with appreciation occurring as the protocol generates and accrues revenue under normal conditions.

Structured beneath USDrf as a subordinated layer, sUSDrf provides a dedicated buffer for the ecosystem's base liquidity – sUSDrf is structured to absorb portfolio losses:

When the portfolio records a loss, the protocol's own first-loss reserves absorb it first; sUSDrf absorbs what remains before any USDrf holder is affected. The degree of protection depends on the size of the staked pool and protocol reserves at the time of any loss. This design deliberately preserves the protection USDrf receives; it is therefore bounded by two figures at the time of the loss: the reserve balance and the size of the staked pool. The ordering is deliberate. It preserves USDrf as the most senior and most liquid asset in the RealFi system.

When the portfolio records a loss, USDrf is burned from the staking vault while the circulating sUSDrf supply is held unchanged, so the loss shows up as a fall in the sUSDrf redemption rate. USDrf itself is never rebased. Holder balances are untouched and USDrf continues to redeem at the fixed ratio set in protocol settings.

One sUSDrf is redeemable for the vault's settled USDrf backing divided by the circulating sUSDrf supply. Outside a yield-diffusion window the vault's on-chain USDrf balance is that settled backing, so anyone can compute the rate directly from public chain data.

Staked USDrf is held at the staking vault script address addr1wyh04daelcpkgahkuz2ld885w2y3wa27r7w82gzdeagsazgtwduhf (script hash 2efab7b9fe036476f6e095f69cf4728917755e1f9c75204dcf510e89). sUSDrf is 7d9e4a0ee1a3f5d5ff8159ea91a83310cf2795ee7a87170c7aea05ae7355534472.