UMIP 57 - Add price identifiers for AAVEUSD, USDAAVE; LINKUSD, USDLINK; SNXUSD, USDSNX; UMAUSD, USDUMA; UNIUSD, USDUNI

This proposal is for adding the following price identifiers to be supported:

  • AAVEUSD, USDAAVE
  • LINKUSD, USDLINK
  • SNXUSD, USDSNX
  • UMAUSD, USDUMA
  • UNIUSD, USDUNI