diff --git a/package.json b/package.json
index 85debc5..7bf3b7b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.20.17",
+  "version": "0.20.18",
   "description": "Orion Protocol SDK",
   "main": "./lib/index.cjs",
   "module": "./lib/index.js",
diff --git a/src/Unit/Exchange/generateSwapCalldata.ts b/src/Unit/Exchange/generateSwapCalldata.ts
index 506c79b..eb59716 100644
--- a/src/Unit/Exchange/generateSwapCalldata.ts
+++ b/src/Unit/Exchange/generateSwapCalldata.ts
@@ -62,7 +62,7 @@ export async function generateSwapCalldataWithUnit({
 
   let path = SafeArray.from(arrayLikePath);
   const walletBalance = await getWalletBalance(
-    safeGet(assetToAddress, path.first().assetIn),
+    assetToAddress[path.first().assetIn] ?? path.first().assetIn.toLowerCase(),
     receiverAddress,
     unit.provider
   );