From 7aa074a31a40ecf13e2f68020f24de78f5537ead Mon Sep 17 00:00:00 2001
From: James Grugett <jahooma@gmail.com>
Date: Wed, 9 Mar 2022 17:02:57 -0600
Subject: [PATCH] Script for paying out contract again

---
 .../src/scripts/pay-out-contract-again.ts     | 105 ++++++++++++++++++
 functions/src/utils.ts                        |   5 -
 2 files changed, 105 insertions(+), 5 deletions(-)
 create mode 100644 functions/src/scripts/pay-out-contract-again.ts

diff --git a/functions/src/scripts/pay-out-contract-again.ts b/functions/src/scripts/pay-out-contract-again.ts
new file mode 100644
index 00000000..96671ed8
--- /dev/null
+++ b/functions/src/scripts/pay-out-contract-again.ts
@@ -0,0 +1,105 @@
+import * as admin from 'firebase-admin'
+import * as _ from 'lodash'
+
+import { initAdmin } from './script-init'
+initAdmin('james')
+
+import { Bet } from '../../../common/bet'
+import { Contract } from '../../../common/contract'
+import {
+  getLoanPayouts,
+  getPayouts,
+  getPayoutsMultiOutcome,
+} from '../../../common/payouts'
+import { filterDefined } from '../../../common/util/array'
+import { payUser } from '../utils'
+
+type DocRef = admin.firestore.DocumentReference
+
+const firestore = admin.firestore()
+
+async function checkIfPayOutAgain(contractRef: DocRef, contract: Contract) {
+  const bets = await contractRef
+    .collection('bets')
+    .get()
+    .then((snap) => snap.docs.map((bet) => bet.data() as Bet))
+
+  const openBets = bets.filter((b) => !b.isSold && !b.sale)
+  const loanedBets = openBets.filter((bet) => bet.loanAmount)
+
+  if (loanedBets.length && contract.resolution) {
+    const { resolution, outcomeType, resolutions, resolutionProbability } =
+      contract
+    const payouts =
+      outcomeType === 'FREE_RESPONSE' && resolutions
+        ? getPayoutsMultiOutcome(resolutions, contract, openBets)
+        : getPayouts(resolution, contract, openBets, resolutionProbability)
+
+    const loanPayouts = getLoanPayouts(openBets)
+    const groups = _.groupBy(
+      [...payouts, ...loanPayouts],
+      (payout) => payout.userId
+    )
+    const userPayouts = _.mapValues(groups, (group) =>
+      _.sumBy(group, (g) => g.payout)
+    )
+
+    const entries = Object.entries(userPayouts)
+    const firstNegative = entries.findIndex(([_, payout]) => payout < 0)
+    const toBePaidOut = firstNegative === -1 ? [] : entries.slice(firstNegative)
+
+    if (toBePaidOut.length) {
+      console.log(
+        'to be paid out',
+        toBePaidOut.length,
+        'already paid out',
+        entries.length - toBePaidOut.length
+      )
+      const positivePayouts = toBePaidOut.filter(([_, payout]) => payout > 0)
+      if (positivePayouts.length)
+        return { contract, toBePaidOut: positivePayouts }
+    }
+  }
+  return undefined
+}
+
+async function payOutContractAgain() {
+  console.log('Recalculating contract info')
+
+  const snapshot = await firestore.collection('contracts').get()
+
+  const [startTime, endTime] = [
+    new Date('2022-03-02'),
+    new Date('2022-03-07'),
+  ].map((date) => date.getTime())
+
+  const contracts = snapshot.docs
+    .map((doc) => doc.data() as Contract)
+    .filter((contract) => {
+      const { resolutionTime } = contract
+      return (
+        resolutionTime && resolutionTime > startTime && resolutionTime < endTime
+      )
+    })
+
+  console.log('Loaded', contracts.length, 'contracts')
+
+  const toPayOutAgain = filterDefined(
+    await Promise.all(
+      contracts.map(async (contract) => {
+        const contractRef = firestore.doc(`contracts/${contract.id}`)
+
+        return await checkIfPayOutAgain(contractRef, contract)
+      })
+    )
+  )
+
+  const flattened = _.flatten(toPayOutAgain.map((d) => d.toBePaidOut))
+
+  for (const [userId, payout] of flattened) {
+    console.log('Paying out', userId, payout)
+    // await payUser(userId, payout)
+  }
+}
+
+if (require.main === module) payOutContractAgain().then(() => process.exit())
diff --git a/functions/src/utils.ts b/functions/src/utils.ts
index f34db1c8..a5d5640f 100644
--- a/functions/src/utils.ts
+++ b/functions/src/utils.ts
@@ -53,11 +53,6 @@ const updateUserBalance = (
 
     const newUserBalance = user.balance + delta
 
-    if (newUserBalance < 0)
-      throw new Error(
-        `User (${userId}) balance cannot be negative: ${newUserBalance}`
-      )
-
     if (isDeposit) {
       const newTotalDeposits = (user.totalDeposits || 0) + delta
       transaction.update(userDoc, { totalDeposits: newTotalDeposits })