Saturn Library
Library how everything here works, in plain words
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Basics

RA, the anchor

Why one small token sits at the centre of lending and pledging.

RA on the token page

In shortRA is a fixed-supply token that Saturn Lending uses to measure everything. Only an RA/TAZ pool can be collateral, and staked RA can be pledged to lenders.

Name
Rare Asset
Supply
10,000, fixed
Pledge lock
30 days on mainnet
Pledgers paid when
the lender's running pledges add up to 50 RA

RA stands for Rare Asset. Exactly 10,000 RA exist and the token is marked finite on the chain, so no more can be created. That scarcity is what makes it usable as a reference point.

RA as the price anchor

Saturn Lending needs to know what a loan and its collateral are worth in the same unit. It reads the price of TAZ in RA from one reference pool: an RA/TAZ pool the Saturn admin picks, whose liquidity is burned or time-locked so nobody can move its price and pull it out again in the same transaction. Until a reference is set, TAZ has no price and no loan can open.

That has one practical consequence for you. A liquidity pool can only be collateral if it is RA/TAZ, RA with TAZ. RA/KCAL, RA/SOUL and KCAL/TAZ pools cannot back a loan. The same rule applies to v3 LP certificates. A pool of RA with any other token used to be accepted, and that token was priced by the very pool it sat in, so anyone could make up a token and pledge a pool worth twice its RA on paper.

RA as a pledge

If you stake RA in Holder rewards, you can pledge part of that stake to a lender for 30 days (the admin sets the length; devnet runs minutes for testing). While the pledge runs, every loan that lender funds, to anyone, pays a slice of its TAZ reward to the lender's pledgers, in proportion to how much each pledged. What counts is the moment the reward is claimed, which comes right after the repayment: a loan claimed while your pledge runs pays you, even one that opened before you pledged, and a loan claimed after your pledge ended does not. The RA never leaves the staking contract, it is only locked, and it keeps earning its share of RA swap fees the whole time.

  • A lender's loans pay pledgers only while its running pledges add up to at least 50 RA. From saturntaz 1.2.2 the admin can also set a smallest single pledge; the pledge forms show it.
  • A lender can have up to 30 pledgers. From saturntaz 1.2.2 a pledge that has ended gives up its place to the next pledger (it stays yours to withdraw). You cannot pledge to yourself, and a borrower who pledges to their own lender gets no pledger share of that loan.
  • Pledges count in whole 0.00000001 RA; a ninth decimal is dropped. From saturntaz 1.2.1 the contract locks exactly what it gives back. Before, it locked the ninth decimal too and never released it.
  • You cannot unstake the pledged part until the pledge ends. Then withdraw it under Lending, Treasury, My pledges: that unlocks the RA, and only then can you unstake it or pledge to the same lender again.
  • Your share collects in a claimable balance; claim it on the same tab.

RA as a staked token

Like any token that trades on Saturn v4, RA can be staked in Holder rewards to earn RA from every swap where RA is the input, plus half the profit of arbitrage bots that borrow idle stake.

Where to get it

Any pool that includes RA. On mainnet the v3 exchange has RA/KCAL and RA/SOUL pools, and v4 has an RA/TAZ pool. No pool can back a loan there until the Saturn admin sets a reference pool.