UMIP 26 -Add XAUPERL and XAUUSD as supported price identifiers

Mhairi-UMA · March 2, 2022, 12:58pm

The DVM should support price requests for the XAUPERL and XAUUSD price indices.

UMAprotocol/UMIPs/blob/master/UMIPs/umip-26.md

## Headers
| UMIP-26    |                                                          |
|------------|----------------------------------------------------------|
| UMIP Title | Add XAUPERL and XAUUSD as supported price identifiers    |
| Authors    | CY (cy@perlin.net)                                       |
| Status     | Approved                                                    |
| Created    | December 14, 2020                                        |

## Summary
The DVM should support price requests for the XAUPERL and XAUUSD price indices.

## Motivation
The DVM currently does not support the XAUPERL or XAUUSD price indices.

### Cost: 
* Pricing of XAUPERL does not exist anywhere yet, but it can be done by dividing XAUUSD price by PERLUSD.

* Pricing of PERLUSD is easily accessible through open centralized exchange APIs. PERL is currently only trading on Binance as outlined in [umip-13](./umip-13.md)

* XAU is referred to gold in troy ounce traded on various exchanges. Pricing of XAUUSD is accessible from data provider’s APIs.

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