From 813ec0bf032a98f8709af2d9647aaf89e7ab7024 Mon Sep 17 00:00:00 2001
From: mantikoros <sgrugett@gmail.com>
Date: Sun, 17 Apr 2022 22:28:59 -0500
Subject: [PATCH] cfmm migration script

---
 functions/src/scripts/migrate-to-cfmm.ts | 124 +++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 functions/src/scripts/migrate-to-cfmm.ts

diff --git a/functions/src/scripts/migrate-to-cfmm.ts b/functions/src/scripts/migrate-to-cfmm.ts
new file mode 100644
index 00000000..2e119bf6
--- /dev/null
+++ b/functions/src/scripts/migrate-to-cfmm.ts
@@ -0,0 +1,124 @@
+import * as admin from 'firebase-admin'
+import * as _ from 'lodash'
+
+import { initAdmin } from './script-init'
+initAdmin('stephenDev')
+
+import {
+  Binary,
+  Contract,
+  CPMM,
+  DPM,
+  FullContract,
+} from '../../../common/contract'
+import { Bet } from '../../../common/bet'
+import {
+  calculateStandardDpmPayout,
+  getDpmProbability,
+} from '../../../common/calculate-dpm'
+import { User } from '../../../common/user'
+import { getCpmmInitialLiquidity } from '../../../common/antes'
+import { noFees } from '../../../common/fees'
+import { addObjects } from '../../../common/util/object'
+
+type DocRef = admin.firestore.DocumentReference
+
+const firestore = admin.firestore()
+
+async function recalculateContract(contractRef: DocRef, isCommit = false) {
+  await firestore.runTransaction(async (transaction) => {
+    const contractDoc = await transaction.get(contractRef)
+    const contract = contractDoc.data() as FullContract<DPM, Binary>
+    console.log('recalculating', contract.slug)
+
+    if (
+      contract.mechanism !== 'dpm-2' ||
+      contract.outcomeType !== 'BINARY' ||
+      !!contract.resolution
+    ) {
+      console.log('invalid candidate to port to cfmm')
+      return
+    }
+
+    const betsRef = contractRef.collection('bets')
+    const betDocs = await transaction.get(betsRef)
+    const bets = _.sortBy(
+      betDocs.docs.map((d) => d.data() as Bet),
+      (b) => b.createdTime
+    )
+
+    for (let bet of bets) {
+      const shares =
+        bet.isSold || bet.sale
+          ? 0
+          : calculateStandardDpmPayout(contract, bet, bet.outcome)
+
+      console.log(
+        'converting',
+        bet.shares,
+        bet.outcome,
+        bet.isSold ? '(sold)' : '',
+        'shares to',
+        shares
+      )
+
+      if (isCommit) transaction.update(betsRef.doc(bet.id), { shares })
+    }
+
+    const prob = getDpmProbability(contract.totalShares)
+    const ante = 100
+    const newPool = { YES: ante, NO: ante }
+    console.log('creating liquidity pool at p=', prob, 'for M$', ante)
+
+    const contractUpdate: Partial<Contract> = {
+      pool: newPool,
+      p: prob,
+      mechanism: 'cpmm-1',
+      totalLiquidity: ante,
+      collectedFees: addObjects(contract.collectedFees ?? noFees, noFees),
+    }
+
+    const liquidityDocRef = contractRef.collection('liquidity').doc()
+
+    const lp = getCpmmInitialLiquidity(
+      { id: 'IPTOzEqrpkWmEzh6hwvAyY9PqFb2' } as User, // use @ManifoldMarkets' id
+      {
+        ...contract,
+        ...contractUpdate,
+      } as FullContract<CPMM, Binary>,
+      liquidityDocRef.id,
+      ante
+    )
+
+    if (isCommit) {
+      transaction.update(contractRef, contractUpdate)
+      transaction.set(liquidityDocRef, lp)
+
+      console.log('updated', contract.slug)
+    }
+  })
+}
+
+async function main() {
+  const slug = process.argv[2]
+  const isCommit = process.argv[3] === 'commit'
+
+  const contractRefs =
+    slug === 'all'
+      ? await firestore.collection('contracts').listDocuments()
+      : await firestore
+          .collection('contracts')
+          .where('slug', '==', slug)
+          .get()
+          .then((snap) =>
+            !snap.empty ? [firestore.doc(`contracts/${snap.docs[0].id}`)] : []
+          )
+
+  for (let contractRef of contractRefs) {
+    await recalculateContract(contractRef, isCommit)
+    console.log()
+    console.log()
+  }
+}
+
+if (require.main === module) main().then(() => process.exit())