Excellent cost feeds enable place owners make knowledgeable choices for exact valuation and seem management of their positions and hazards.
It also guides NUT holders by means of the liquidation course of action:
– Position proprietors need to intently check their collateralization ratio. If the ratio drops below the 170% minimum amount collateralization threshold, the owner will suffer a 20% liquidation penalty. The EOS price feed determines the current dollar benefit of the collateral, which in change is divided by the greenback benefit of the EOSDT personal debt (assuming 1 EOSDT = 1 USD) in purchase to calculate the collateralization ratio.
– NUT holders can obtain EOS collateral with NUT at a discounted, then purchase and redeem the bad EOSDT debt. In other words, they are de-leveraging the Equilibrium Equilibrium Sheet. This cost-dependent method need to be quickly executed to properly lessen Equilibrium’s insolvency chance.
The EOS price tag feed needs to be precise and trustworthy. If not, the implications on a contract’s output can be catastrophic.
The good oracle dilemma
Synthetix, a support that presents fiat currency stablecoins, knowledgeable severe challenges in June 2019 because of to a mispriced Korean Won (KRW) price in its personal oracle. In normal conditions, the reference selling price created is based on the normal of several sources.
Let’s contemplate a hypothetical situation wherever the original collateralization ratio is at 170%. Shut your eyes, open them a couple minutes later on, and consider that EOS cost has declined much more than 45% in that quick time.
The ensuing collateralization ratio is now below 100%! Equilibrium is insolvent and the oracle failed to warn the framework in time! A drop like this hasn’t took place on EOS nevertheless, but there is normally a possibility that it could transpire in the foreseeable future. Let us visualize a more even worse situation in which the oracle feed is not delayed, but incorrect, like with Synthetix.
Whichever choice the sensible agreement tends to make will not only be improper, but will commonly be irreversible as well.
The trouble we have been describing so much is “the great oracle trouble.” If we feed outdated or incorrect data to a wise contract, that contract’s output will probably be incorrect as very well: rubbish in, garbage out.
Medianize it
A single resolution is to use not just one but multiple external price tag feeds. The robust median price of documented costs would outline a trusted, extra exact reference price than the typical.
It is not impacted by outliers, consequently it would disregard any outdated or faulty cost as lengthy as most of the selling price feeds are neither outdated nor faulty.
In any case, this is no assurance that there won’t be any mispricing down the highway, but it is an vital phase in the appropriate direction.
The inclusion of various sources, combined with the selection of the median as a reference selling price, dramatically increases the oracle’s good quality.
In the situation of MakerDAO, the triggers for a reference rate update are both:
– a variation amongst the very last reference selling price and the current median value that’s above 1%
– an update time that comes a lot more than 6 hrs following the prior cost update.
The RAM source is also at the moment capped at 129.13 GB. These constraints travel dApp builders to glimpse for reasonably priced and powerful answers.
Equilibrium’s partnership with LiquidApps
As a first stage, Equilibrium refactored its prices table to include the EOS and NUT costs quoted in several currencies from many resources.
Acting as arbitrators, NUT holders will need to observe well timed and regular EOS and NUT reference charges to figure out whether or not they must tackle the liquidation, or be expecting to tackle it extremely soon.
Timing is usually critical in a market that will extra most likely be volatile when sizeable liquidations are induced. A swift process brings far more certainty in an arbitrator’s skill to turn the…