diff --git a/common/txn.ts b/common/txn.ts
index 00b19570..713d4a38 100644
--- a/common/txn.ts
+++ b/common/txn.ts
@@ -1,6 +1,12 @@
 // A txn (pronounced "texan") respresents a payment between two ids on Manifold
 // Shortened from "transaction" to distinguish from Firebase transactions (and save chars)
-type AnyTxnType = Donation | Tip | Manalink | Referral | Bonus
+type AnyTxnType =
+  | Donation
+  | Tip
+  | Manalink
+  | Referral
+  | UniqueBettorBonus
+  | BettingStreakBonus
 type SourceType = 'USER' | 'CONTRACT' | 'CHARITY' | 'BANK'
 
 export type Txn<T extends AnyTxnType = AnyTxnType> = {
@@ -60,10 +66,27 @@ type Referral = {
   category: 'REFERRAL'
 }
 
-type Bonus = {
+type UniqueBettorBonus = {
   fromType: 'BANK'
   toType: 'USER'
-  category: 'UNIQUE_BETTOR_BONUS' | 'BETTING_STREAK_BONUS'
+  category: 'UNIQUE_BETTOR_BONUS'
+  // This data was mistakenly stored as a stringified JSON object in description previously
+  data: {
+    contractId: string
+    uniqueNewBettorId?: string
+    // Previously stored all unique bettor ids in description
+    uniqueBettorIds?: string[]
+  }
+}
+
+type BettingStreakBonus = {
+  fromType: 'BANK'
+  toType: 'USER'
+  category: 'BETTING_STREAK_BONUS'
+  // This data was mistakenly stored as a stringified JSON object in description previously
+  data: {
+    currentBettingStreak?: number
+  }
 }
 
 export type DonationTxn = Txn & Donation
diff --git a/functions/src/on-create-bet.ts b/functions/src/on-create-bet.ts
index 5fe3fd62..7f4ca067 100644
--- a/functions/src/on-create-bet.ts
+++ b/functions/src/on-create-bet.ts
@@ -119,6 +119,7 @@ const updateBettingStreak = async (
       token: 'M$',
       category: 'BETTING_STREAK_BONUS',
       description: JSON.stringify(bonusTxnDetails),
+      data: bonusTxnDetails,
     }
     return await runTxn(trans, bonusTxn)
   })
@@ -186,7 +187,7 @@ const updateUniqueBettorsAndGiveCreatorBonus = async (
   // Create combined txn for all new unique bettors
   const bonusTxnDetails = {
     contractId: contract.id,
-    uniqueBettorIds: newUniqueBettorIds,
+    uniqueNewBettorId: bettor.id,
   }
   const fromUserId = isProd()
     ? HOUSE_LIQUIDITY_PROVIDER_ID
@@ -204,6 +205,7 @@ const updateUniqueBettorsAndGiveCreatorBonus = async (
       token: 'M$',
       category: 'UNIQUE_BETTOR_BONUS',
       description: JSON.stringify(bonusTxnDetails),
+      data: bonusTxnDetails,
     }
     return await runTxn(trans, bonusTxn)
   })
diff --git a/functions/src/scripts/update-bonus-txn-data-fields.ts b/functions/src/scripts/update-bonus-txn-data-fields.ts
new file mode 100644
index 00000000..82955fa0
--- /dev/null
+++ b/functions/src/scripts/update-bonus-txn-data-fields.ts
@@ -0,0 +1,34 @@
+import * as admin from 'firebase-admin'
+
+import { initAdmin } from './script-init'
+import { Txn } from 'common/txn'
+import { getValues } from 'functions/src/utils'
+
+initAdmin()
+
+const firestore = admin.firestore()
+
+async function main() {
+  // get all txns
+  const bonusTxns = await getValues<Txn>(
+    firestore
+      .collection('txns')
+      .where('category', 'in', ['UNIQUE_BETTOR_BONUS', 'BETTING_STREAK_BONUS'])
+  )
+  // JSON parse description field and add to data field
+  const updatedTxns = bonusTxns.map((txn) => {
+    txn.data = txn.description && JSON.parse(txn.description)
+    return txn
+  })
+  console.log('updatedTxns', updatedTxns[0])
+  // update txns
+  await Promise.all(
+    updatedTxns.map((txn) => {
+      return firestore.collection('txns').doc(txn.id).update({
+        data: txn.data,
+      })
+    })
+  )
+}
+
+if (require.main === module) main().then(() => process.exit())