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+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.The `value` tag contains the amount, parseable to a Decimal.`n` tags separate the conversion ticker into the two ticket symbols.The event's `created_at` field MUST be used as the date/time of the conversion value.
+
+```js
+{
+  "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 use Nostr's `since` and `until` filter to narrow the search.
+
+```js
+{
+  "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 `pubkey` of the provider and the relay where those events are stored.
+
+```js
+{
+  "kind": 10041,
+  "tags": [
+    ["s", "4fd5e210530e4f6b2cb083795834bfe5108324f1ed9f00ab73b9e8fcfe5f12fe", "wss://bitagent.prices"],
+  ],
+  //...
+}
+```
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