Cancel bet endpoint.

functions/src/cancel-bet.ts

@@ -0,0 +1,35 @@
+import * as admin from 'firebase-admin'
+import { z } from 'zod'
+import { APIError, newEndpoint, validate } from './api'
+import { LimitBet } from '../../common/bet'
+
+const bodySchema = z.object({
+  betId: z.string(),
+})
+
+export const cancelbet = newEndpoint({}, async (req, auth) => {
+  const { betId } = validate(bodySchema, req.body)
+
+  const result = await firestore.runTransaction(async (trans) => {
+    const snap = await trans.get(
+      firestore.collectionGroup('bets').where('id', '==', betId)
+    )
+    const betDoc = snap.docs[0]
+    if (!betDoc?.exists) throw new APIError(400, 'Bet not found.')
+
+    const bet = betDoc.data() as LimitBet
+    if (bet.userId !== auth.uid)
+      throw new APIError(400, 'Not authorized to cancel bet.')
+    if (bet.limitProb === undefined)
+      throw new APIError(400, 'Not a limit bet: Cannot cancel.')
+    if (bet.isCancelled) throw new APIError(400, 'Bet already cancelled.')
+
+    trans.update(betDoc.ref, { isCancelled: true })
+
+    return { ...bet, isCancelled: true }
+  })
+
+  return result
+})
+
+const firestore = admin.firestore()

functions/src/index.ts

@@ -32,6 +32,7 @@ export * from './on-update-user'
 // v2
 export * from './health'
 export * from './place-bet'
+export * from './cancel-bet'
 export * from './sell-bet'
 export * from './sell-shares'
 export * from './create-contract'

functions/src/place-bet.ts

@@ -1,5 +1,7 @@
 import * as admin from 'firebase-admin'
 import { z } from 'zod'
+import { Query } from 'firebase-admin/firestore'
+import { sumBy } from 'lodash'
 
 import { APIError, newEndpoint, validate } from './api'
 import { Contract, CPMM_MIN_POOL_QTY } from '../../common/contract'
@@ -11,12 +13,10 @@ import {
   getNumericBetsInfo,
 } from '../../common/new-bet'
 import { addObjects, removeUndefinedProps } from '../../common/util/object'
+import { LimitBet } from '../../common/bet'
+import { floatingEqual } from '../../common/util/math'
 import { redeemShares } from './redeem-shares'
 import { log } from './utils'
-import { LimitBet } from 'common/bet'
-import { Query } from 'firebase-admin/firestore'
-import { sumBy } from 'lodash'
-import { floatingEqual } from 'common/util/math'
 
 const bodySchema = z.object({
   contractId: z.string(),

web/components/open-bets.tsx

@@ -3,7 +3,10 @@ import { LimitBet } from 'common/bet'
 import { formatPercent } from 'common/lib/util/format'
 import { formatMoney } from 'common/util/format'
 import { sortBy, sumBy } from 'lodash'
+import { useState } from 'react'
+import { cancelBet } from 'web/lib/firebase/api-call'
 import { Col } from './layout/col'
+import { LoadingIndicator } from './loading-indicator'
 import { BinaryOutcomeLabel } from './outcome-label'
 
 export function OpenBets(props: { bets: LimitBet[]; className?: string }) {
@@ -16,13 +19,7 @@ export function OpenBets(props: { bets: LimitBet[]; className?: string }) {
       <table className="table-compact table w-full rounded text-gray-500">
         <tbody>
           {recentBets.map((bet) => (
-            <LimitBet
-              key={bet.id}
-              bet={bet}
-              onCancel={() => {
-                console.log('Cancel', bet)
-              }}
-            />
+            <LimitBet key={bet.id} bet={bet} />
           ))}
         </tbody>
       </table>
@@ -30,9 +27,16 @@ export function OpenBets(props: { bets: LimitBet[]; className?: string }) {
   )
 }
 
-function LimitBet(props: { bet: LimitBet; onCancel: () => void }) {
-  const { bet, onCancel } = props
+function LimitBet(props: { bet: LimitBet }) {
+  const { bet } = props
   const filledAmount = sumBy(bet.fills, (fill) => fill.amount)
+  const [isCancelling, setIsCancelling] = useState(false)
+
+  const onCancel = () => {
+    cancelBet({ betId: bet.id })
+    setIsCancelling(true)
+  }
+
   return (
     <tr>
       <td>
@@ -43,12 +47,16 @@ function LimitBet(props: { bet: LimitBet; onCancel: () => void }) {
       <td>{formatMoney(bet.amount - filledAmount)}</td>
       <td>{formatPercent(bet.limitProb)}</td>
       <td>
-        <button
-          className="btn btn-xs btn-outline my-auto normal-case"
-          onClick={onCancel}
-        >
-          Cancel
-        </button>
+        {isCancelling ? (
+          <LoadingIndicator />
+        ) : (
+          <button
+            className="btn btn-xs btn-outline my-auto normal-case"
+            onClick={onCancel}
+          >
+            Cancel
+          </button>
+        )}
       </td>
     </tr>
   )

web/lib/firebase/api-call.ts

@@ -62,6 +62,10 @@ export function placeBet(params: any) {
   return call(getFunctionUrl('placebet'), 'POST', params)
 }
 
+export function cancelBet(params: { betId: string }) {
+  return call(getFunctionUrl('cancelbet'), 'POST', params)
+}
+
 export function sellShares(params: any) {
   return call(getFunctionUrl('sellshares'), 'POST', params)
 }