From 22edf57b4fe47d27bb1494f8a7e50cf3607d13a8 Mon Sep 17 00:00:00 2001
From: Sinclair Chen <abc.sinclair@gmail.com>
Date: Fri, 13 Sep 2024 18:03:52 -0700
Subject: [PATCH] Remove creator fee (#2857)

---
 backend/api/src/place-bet.ts                  | 36 ++++++++++---------
 common/src/fees.ts                            |  9 +++++
 web/components/bet/fees.tsx                   |  8 +++--
 .../contract/creator-fees-display.tsx         |  8 +++--
 4 files changed, 40 insertions(+), 21 deletions(-)

diff --git a/backend/api/src/place-bet.ts b/backend/api/src/place-bet.ts
index 9036f67a5c..2628b4ab51 100644
--- a/backend/api/src/place-bet.ts
+++ b/backend/api/src/place-bet.ts
@@ -16,7 +16,7 @@ import { Answer } from 'common/answer'
 import { CpmmState, getCpmmProbability } from 'common/calculate-cpmm'
 import { ValidatedAPIParams } from 'common/api/schema'
 import { onCreateBets } from 'api/on-create-bet'
-import { BANNED_TRADING_USER_IDS } from 'common/envs/constants'
+import { BANNED_TRADING_USER_IDS, TWOMBA_ENABLED } from 'common/envs/constants'
 import * as crypto from 'crypto'
 import { formatMoneyWithDecimals } from 'common/util/format'
 import {
@@ -248,7 +248,7 @@ export const fetchContractBetDataAndValidate = async (
   const queries = `
     select * from users where id = $1;
     select ${contractColumnsToSelect} from contracts where id = $2;
-    select * from answers 
+    select * from answers
       where contract_id = $2 and (
           ($3 is null or id in ($3:list)) or
           (select (data->'shouldAnswersSumToOne')::boolean from contracts where id = $2)
@@ -546,22 +546,24 @@ export const executeNewBetResult = async (
   )
   log(`Updated user ${user.username} balance - auth ${user.id}.`)
 
-  const totalCreatorFee =
-    newBet.fees.creatorFee +
-    sumBy(otherBetResults, (r) => r.bet.fees.creatorFee)
-  if (totalCreatorFee !== 0) {
-    await incrementBalance(pgTrans, contract.creatorId, {
-      balance: totalCreatorFee,
-      totalDeposits: totalCreatorFee,
-    })
+  if (!TWOMBA_ENABLED) {
+    const totalCreatorFee =
+      newBet.fees.creatorFee +
+      sumBy(otherBetResults, (r) => r.bet.fees.creatorFee)
+    if (totalCreatorFee !== 0) {
+      await incrementBalance(pgTrans, contract.creatorId, {
+        balance: totalCreatorFee,
+        totalDeposits: totalCreatorFee,
+      })
 
-    log(
-      `Updated creator ${
-        contract.creatorUsername
-      } with fee gain ${formatMoneyWithDecimals(totalCreatorFee)} - ${
-        contract.creatorId
-      }.`
-    )
+      log(
+        `Updated creator ${
+          contract.creatorUsername
+        } with fee gain ${formatMoneyWithDecimals(totalCreatorFee)} - ${
+          contract.creatorId
+        }.`
+      )
+    }
   }
 
   const answerUpdates: {
diff --git a/common/src/fees.ts b/common/src/fees.ts
index f7002b2ca3..ad59b0dc1f 100644
--- a/common/src/fees.ts
+++ b/common/src/fees.ts
@@ -1,4 +1,5 @@
 import { addObjects } from 'common/util/object'
+import { TWOMBA_ENABLED } from './envs/constants'
 
 export const FEE_START_TIME = 1713292320000
 
@@ -12,6 +13,14 @@ export const getFeesSplit = (
   totalFees: number,
   previouslyCollectedFees: Fees
 ) => {
+  if (TWOMBA_ENABLED) {
+    return {
+      creatorFee: 0,
+      platformFee: totalFees,
+      liquidityFee: 0,
+    }
+  }
+
   const before1k = Math.max(
     0,
     CREATORS_EARN_WHOLE_FEE_UP_TO - previouslyCollectedFees.creatorFee
diff --git a/web/components/bet/fees.tsx b/web/components/bet/fees.tsx
index 4ccc1b838f..a596938a93 100644
--- a/web/components/bet/fees.tsx
+++ b/web/components/bet/fees.tsx
@@ -1,4 +1,4 @@
-import { TRADE_TERM } from 'common/envs/constants'
+import { TRADE_TERM, TWOMBA_ENABLED } from 'common/envs/constants'
 import { InfoTooltip } from '../widgets/info-tooltip'
 import { MoneyDisplay } from './money-display'
 
@@ -20,7 +20,11 @@ export const FeeDisplay = (props: {
       <InfoTooltip
         text={`${(amount ? (100 * totalFees) / amount : 0).toFixed(
           2
-        )}% fee. Goes to the market creator up to 1000, then is split 50-50 with Manifold. Fees range from 0% to 7% of your ${TRADE_TERM} amount increasing the more unlikely your ${TRADE_TERM} is to pay out.`}
+        )}% fee. Goes to ${
+          TWOMBA_ENABLED
+            ? ''
+            : 'the market creator up to 1000, then is split 50-50 with '
+        }Manifold. Fees range from 0% to 7% of your ${TRADE_TERM} amount increasing the more unlikely your ${TRADE_TERM} is to pay out.`}
         className="text-ink-600 ml-1 mt-0.5"
         size="sm"
       />
diff --git a/web/components/contract/creator-fees-display.tsx b/web/components/contract/creator-fees-display.tsx
index 5c86269deb..98d70e5af1 100644
--- a/web/components/contract/creator-fees-display.tsx
+++ b/web/components/contract/creator-fees-display.tsx
@@ -10,6 +10,10 @@ export const CreatorFeesDisplay = (props: {
   const { contract, className } = props
   const { collectedFees } = contract
   const isCashContract = contract.token === 'CASH'
+
+  // cash contracts have no creator fees
+  if (isCashContract) return null
+
   return (
     <Tooltip
       text={'Fees earned from trade volume'}
@@ -19,8 +23,8 @@ export const CreatorFeesDisplay = (props: {
     >
       {formatWithToken({
         amount: collectedFees.creatorFee,
-        token: isCashContract ? 'CASH' : 'M$',
-        toDecimal: isCashContract ? 4 : 2,
+        token: 'M$',
+        toDecimal: 2,
       })}{' '}
       earned
     </Tooltip>