From c5dd4a0e82db458daed22890d56e60cd2b278df4 Mon Sep 17 00:00:00 2001
From: Riordan Panayides <riordan@panayid.es>
Date: Thu, 27 Apr 2023 17:23:18 +0100
Subject: [PATCH] Add warning state if oracle is stale, convert last updated to
 human readable format

---
 components/trade/OraclePrice.tsx | 58 +++++++++++++++++++++++++++++---
 1 file changed, 53 insertions(+), 5 deletions(-)

diff --git a/components/trade/OraclePrice.tsx b/components/trade/OraclePrice.tsx
index 7a7c26a0..611d6686 100644
--- a/components/trade/OraclePrice.tsx
+++ b/components/trade/OraclePrice.tsx
@@ -1,4 +1,7 @@
-import { InformationCircleIcon } from '@heroicons/react/24/outline'
+import {
+  ExclamationTriangleIcon,
+  InformationCircleIcon,
+} from '@heroicons/react/24/outline'
 import useSelectedMarket from 'hooks/useSelectedMarket'
 import Tooltip from '@components/shared/Tooltip'
 import { useTranslation } from 'next-i18next'
@@ -15,6 +18,9 @@ import {
   formatCurrencyValue,
   getDecimalCount,
 } from 'utils/numbers'
+import dayjs from 'dayjs'
+import duration from 'dayjs/plugin/duration'
+import relativeTime from 'dayjs/plugin/relativeTime'
 
 const OraclePrice = () => {
   const {
@@ -23,10 +29,16 @@ const OraclePrice = () => {
     selectedMarket,
     quoteBank,
   } = useSelectedMarket()
+  dayjs.extend(duration)
+  dayjs.extend(relativeTime)
+
   const connection = mangoStore((s) => s.connection)
   const [price, setPrice] = useState(stalePrice)
   const [oracleProviderName, setOracleProviderName] = useState('Unknown')
   const [oracleLastUpdatedSlot, setOracleLastUpdatedSlot] = useState(0)
+  const [highestSlot, setHighestSlot] = useState(0)
+  const [isStale, setIsStale] = useState(false)
+
   const { t } = useTranslation(['common', 'trade'])
 
   //subscribe to the market oracle account
@@ -65,7 +77,7 @@ const OraclePrice = () => {
     const coder = new BorshAccountsCoder(client.program.idl)
     const subId = connection.onAccountChange(
       marketOrBank.oracle,
-      async (info, _context) => {
+      async (info, context) => {
         // selectedMarket = mangoStore.getState().selectedMarket.current
         // if (!(selectedMarket instanceof PerpMarket)) return
         const { price, uiPrice, lastUpdatedSlot } =
@@ -80,6 +92,22 @@ const OraclePrice = () => {
         marketOrBank._uiPrice = uiPrice
         marketOrBank._oracleLastUpdatedSlot = lastUpdatedSlot
         setOracleLastUpdatedSlot(lastUpdatedSlot)
+
+        const marketSlot = mangoStore.getState().selectedMarket.lastSeenSlot
+        const oracleWriteSlot = context.slot
+        const accountSlot = mangoStore.getState().mangoAccount.lastSlot
+        const highestSlot = Math.max(
+          marketSlot.bids,
+          marketSlot.asks,
+          oracleWriteSlot,
+          accountSlot
+        )
+        setHighestSlot(highestSlot)
+        setIsStale(
+          highestSlot - lastUpdatedSlot >
+            marketOrBank.oracleConfig.maxStalenessSlots.toNumber()
+        )
+
         if (selectedMarket instanceof PerpMarket) {
           setPrice(uiPrice)
         } else {
@@ -108,10 +136,26 @@ const OraclePrice = () => {
     <>
       <div id="trade-step-two" className="flex-col whitespace-nowrap md:ml-6">
         <Tooltip
+          placement="bottom"
           content={
             <>
-              <div>This price is provided by {oracleProviderName}</div>
-              <div>Last updated at slot {oracleLastUpdatedSlot}</div>
+              <div>This price is provided by {oracleProviderName}.</div>
+              <div className="mt-2">
+                Last updated{' '}
+                {dayjs
+                  .duration({
+                    seconds: -((highestSlot - oracleLastUpdatedSlot) * 0.5),
+                  })
+                  .humanize(true)}
+                .
+              </div>
+              {isStale ? (
+                <div className="mt-2 font-black">
+                  This oracle has not updated recently.
+                  <br />
+                  Actions will fail for accounts with a position in this token.
+                </div>
+              ) : undefined}
             </>
           }
         >
@@ -119,7 +163,11 @@ const OraclePrice = () => {
             <div className="text-xs text-th-fgd-4">
               {t('trade:oracle-price')}
             </div>
-            <InformationCircleIcon className="ml-1 h-4 w-4 text-th-fgd-4" />
+            {isStale ? (
+              <ExclamationTriangleIcon className="ml-1 h-4 w-4 text-th-warning" />
+            ) : (
+              <InformationCircleIcon className="ml-1 h-4 w-4 text-th-fgd-4" />
+            )}
           </div>
         </Tooltip>
         <div className="font-mono text-xs text-th-fgd-2">