Cancel your limit orders if you run out of money

functions/src/on-update-user.ts

@@ -5,6 +5,8 @@ import { HOUSE_LIQUIDITY_PROVIDER_ID } from '../../common/antes'
 import { createNotification } from './create-notification'
 import { ReferralTxn } from '../../common/txn'
 import { Contract } from '../../common/contract'
+import { LimitBet } from 'common/bet'
+import { QuerySnapshot } from 'firebase-admin/firestore'
 const firestore = admin.firestore()
 
 export const onUpdateUser = functions.firestore
@@ -17,6 +19,10 @@ export const onUpdateUser = functions.firestore
     if (prevUser.referredByUserId !== user.referredByUserId) {
       await handleUserUpdatedReferral(user, eventId)
     }
+
+    if (user.balance <= 0) {
+      await cancelLimitOrders(user.id)
+    }
   })
 
 async function handleUserUpdatedReferral(user: User, eventId: string) {
@@ -109,3 +115,15 @@ async function handleUserUpdatedReferral(user: User, eventId: string) {
     )
   })
 }
+
+async function cancelLimitOrders(userId: string) {
+  const snapshot = (await firestore
+    .collectionGroup('bets')
+    .where('userId', '==', userId)
+    .where('isFilled', '==', false)
+    .get()) as QuerySnapshot<LimitBet>
+
+  await Promise.all(
+    snapshot.docs.map((doc) => doc.ref.update({ isCancelled: true }))
+  )
+}