diff --git a/.changeset/orange-wolves-watch.md b/.changeset/orange-wolves-watch.md
new file mode 100644
index 00000000..3532258b
--- /dev/null
+++ b/.changeset/orange-wolves-watch.md
@@ -0,0 +1,5 @@
+---
+'@3loop/transaction-interpreter': patch
+---
+
+Fix interpreter crash during number formatting
diff --git a/packages/transaction-interpreter/interpreters/std.ts b/packages/transaction-interpreter/interpreters/std.ts
index a58afea6..f4c06418 100644
--- a/packages/transaction-interpreter/interpreters/std.ts
+++ b/packages/transaction-interpreter/interpreters/std.ts
@@ -10,6 +10,7 @@ interface FilterOptions {
   excludeZero?: boolean
   excludeNull?: boolean
   excludeDuplicates?: boolean
+  sumUpRepeated?: boolean
 }
 
 export const filterTransfers = (transfers: Asset[], filters: FilterOptions = {}): Asset[] => {
@@ -29,6 +30,25 @@ export const filterTransfers = (transfers: Asset[], filters: FilterOptions = {})
     )
   }
 
+  if (filters.sumUpRepeated) {
+    const transferMap = new Map<string, Asset>()
+
+    filtered.forEach((transfer) => {
+      const key = transfer.from.toLowerCase() + '-' + transfer.to.toLowerCase() + '-' + transfer.address.toLowerCase()
+
+      if (transferMap.has(key)) {
+        const existing = transferMap.get(key) || { ...transfer }
+        const existingAmount = existing.amount ? Number(existing.amount) : 0
+        const newAmount = transfer.amount ? Number(transfer.amount) : 0
+        existing.amount = (existingAmount + newAmount).toString()
+      } else {
+        transferMap.set(key, { ...transfer })
+      }
+    })
+
+    filtered = Array.from(transferMap.values())
+  }
+
   return filtered
 }
 
@@ -176,20 +196,28 @@ export function displayAddress(address: string): string {
 }
 
 export const formatNumber = (numberString: string, precision = 3): string => {
-  const [integerPart, decimalPart] = numberString.split('.')
-  const bigIntPart = BigInt(integerPart)
+  // Convert scientific notation to regular number
+  const num = Number(numberString)
+
+  if (isNaN(num)) return numberString
+
+  // For very small numbers (less than 0.000001), return in scientific notation
+  if (num < 0.000001 && num > 0) {
+    return num.toExponential(precision)
+  }
+
+  const [integerPart, decimalPart] = num.toString().split('.')
 
   if ((integerPart && integerPart.length < 3 && !decimalPart) || (decimalPart && decimalPart.startsWith('000')))
     return numberString
 
   // Format the integer part manually
   let formattedIntegerPart = ''
-  const integerStr = bigIntPart.toString()
-  for (let i = 0; i < integerStr.length; i++) {
-    if (i > 0 && (integerStr.length - i) % 3 === 0) {
+  for (let i = 0; i < integerPart.length; i++) {
+    if (i > 0 && (integerPart.length - i) % 3 === 0) {
       formattedIntegerPart += ','
     }
-    formattedIntegerPart += integerStr[i]
+    formattedIntegerPart += integerPart[i]
   }
 
   // Format the decimal part
@@ -235,6 +263,11 @@ export function displayAssets(assets: Payment[]) {
 export function isSwap(event: DecodedTransaction): boolean {
   if (event.transfers.some((t) => t.type !== 'ERC20' && t.type !== 'native')) return false
 
+  const minted = assetsSent(event.transfers, NULL_ADDRESS)
+  const burned = assetsReceived(event.transfers, NULL_ADDRESS)
+
+  if (minted.length > 0 || burned.length > 0) return false
+
   const transfers = filterTransfers(event.transfers, {
     excludeZero: true,
     excludeNull: true,
diff --git a/packages/transaction-interpreter/interpreters/zeroEx.ts b/packages/transaction-interpreter/interpreters/zeroEx.ts
index d22647dc..a70641a5 100644
--- a/packages/transaction-interpreter/interpreters/zeroEx.ts
+++ b/packages/transaction-interpreter/interpreters/zeroEx.ts
@@ -1,39 +1,55 @@
-import { assetsReceived, categorizedDefaultEvent, displayAsset, getNetTransfers } from './std.js'
+import { assetsReceived, categorizedDefaultEvent, displayAsset, getNetTransfers, filterTransfers } from './std.js'
 import type { InterpretedTransaction } from '@/types.js'
 import type { DecodedTransaction } from '@3loop/transaction-decoder'
 
 export function transformEvent(event: DecodedTransaction): InterpretedTransaction {
   const newEvent = categorizedDefaultEvent(event)
-  const recipient = event.fromAddress
-  const contractAddress = event.toAddress
 
-  if (!contractAddress) return newEvent
+  if (!event.toAddress) return newEvent
 
-  const netSent = getNetTransfers({
-    transfers: event.transfers,
-    fromAddresses: [event.fromAddress],
-    type: ['ERC20', 'native'],
+  const filteredTransfers = filterTransfers(event.transfers, {
+    excludeZero: true,
+    excludeNull: true,
+    sumUpRepeated: true,
   })
 
-  const netReceived = getNetTransfers({
-    transfers: event.transfers,
-    toAddresses: [recipient],
-    fromAddresses: [contractAddress],
+  const netSent = getNetTransfers({
+    transfers: filteredTransfers,
+    fromAddresses: [event.fromAddress],
     type: ['ERC20', 'native'],
   })
 
-  //filter the same tokne from netReceived (to filter out received fees)
   const sentTokens = netSent.map((t) => t.asset.address)
-  const filteredNetReceived = netReceived.filter((t) => !sentTokens.includes(t.asset.address))
 
-  if (netSent.length === 1 && filteredNetReceived.length === 1) {
+  let netReceived
+
+  const buyToken = event.methodCall?.params?.[0]?.components?.find((c) => c.name === 'buyToken') as
+    | { value: string }
+    | undefined
+
+  if (buyToken) {
+    netReceived = getNetTransfers({
+      transfers: filteredTransfers.filter((t) => t.address === buyToken.value),
+      type: ['ERC20', 'native'],
+    })
+  } else {
+    netReceived = getNetTransfers({
+      transfers: filteredTransfers,
+      toAddresses: [event.toAddress],
+      type: ['ERC20', 'native'],
+    }).filter((t) => !sentTokens.includes(t.asset.address))
+  }
+
+  const receivedTokens = netReceived.map((t) => t.asset.address)
+
+  if (netSent.length === 1 && netReceived.length === 1) {
     return {
       ...newEvent,
       type: 'swap',
-      action: 'Swapped ' + displayAsset(netSent[0]) + ' for ' + displayAsset(filteredNetReceived[0]),
+      action: 'Swapped ' + displayAsset(netSent[0]) + ' for ' + displayAsset(netReceived[0]),
       assetsReceived: assetsReceived(
-        event.transfers.filter((t) => filteredNetReceived.some((r) => r.asset.address === t.address)),
-        recipient,
+        filteredTransfers.filter((t) => receivedTokens.includes(t.address)),
+        event.fromAddress,
       ),
     }
   }