Guard against bad on-chain data producing absurd APYs

Author: apexearth

src/templates/origin-arm/arm-apy.ts

@@ -16,5 +16,14 @@ export const calculateArmDailyApy = ({
   const startOfDay = dayjs(date).startOf('day').toDate()
   const endOfDay = dayjs(date).endOf('day').toDate()
 
-  return calculateAPY(startOfDay, endOfDay, previousDailyStat?.assetsPerShare ?? 10n ** 18n, state.assetsPerShare)
+  const result = calculateAPY(
+    startOfDay,
+    endOfDay,
+    previousDailyStat?.assetsPerShare ?? 10n ** 18n,
+    state.assetsPerShare,
+  )
+  // Guard against bad on-chain data producing absurd APYs. Anything above
+  // 1000% is treated as noise and zeroed out.
+  if (result.apy > 10) return { apr: 0, apy: 0 }
+  return result
 }