Asset Prices

NIP-85#

Asset Prices#

draft optional

This NIP defines event kinds to host asset prices.

Latest Price#

Kind 31892 stores the latest conversion price. The d tag contains the commonly used ticket conversion symbol for the pair. The value tag contains the amount, parseable to a Decimal. n tags separate the pair into the two ticket symbols. The event's created_at field MUST be used as the date/time of the conversion value.

{
  "kind": 31892,
  "tags": [
    ["d", "BTCUSD"],
    ["n", "BTC"],
    ["n", "USD"],
    ["value", "100000"]
  ],
  // other fields
}

Since this is a replaceable event, only the latest price will be available.

Historical Data#

Historical prices can be found as 1892 events with the same structure as 31892. Historical queries can then use Nostr's since and until filters to narrow the search.

{
  "kind": 1892,
  "tags": [
    ["d", "BTCUSD"],
    ["n", "BTC"],
    ["n", "USD"],
    ["value", "100000"]
  ],
  // other fields
}

Even though these events use the d tag, they are not replaceable.

Declaring Pricing Providers#

Kind 10041 lists the user's authorized providers for pricing services. It contains s tags with the provider's pubkey and the relay where those events are stored.

{
  "kind": 10041,
  "tags": [
    ["s", "4fd5e210530e4f6b2cb083795834bfe5108324f1ed9f00ab73b9e8fcfe5f12fe", "wss://bitagent.prices"],
  ],
  //...
}