Mhairi
March 3, 2022, 3:16pm
1
This UMIP will have the effect of introducing a new, slimmed down optimistic oracle contract that will allow optimistic settlement of prices with lower gas costs. This will reduce the cost for end-users of UMA’s oracle infrastructure.
## Headers
| UMIP-135 | |
|------------|---------------------------------|
| UMIP Title | Add Skinny Optimistic Oracle |
| Authors | Matt Rice (matt@umaproject.org) |
| Status | Last Call |
| Created | October 18, 2021 |
## Summary (2-5 sentences)
This UMIP will have the effect of introducing a new, slimmed down optimistic oracle contract that will allow optimistic settlement of prices with lower gas costs. This will reduce the cost for end-users of UMA's oracle infrastructure.
## Motivation
Prior to addition of this Optimistic Oracle, it could cost millions of gas to complete an Optimistic Oracle request lifecycle.
## Technical Specification
To accomplish this upgrade, a few actions will need to be taken:
- A new `SkinnyOptimisticOracle` contract has been deployed at [0x4060dba72344da74edaeeae51a71a57f7e96b6b4](https://etherscan.io/address/0x4060dba72344da74edaeeae51a71a57f7e96b6b4).
- A transaction will need to be proposed to add this new address to the `Finder` contract under the name `SkinnyOptimisticOracle`. This is how other contracts will find the optimistic oracle and reference it.
- The `SkinnyOptimisticOracle` will need to be registered with the `Registry` so that it can make requests to the DVM.
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