diff --git a/js/src/ui/MethodDecoding/methodDecodingStore.js b/js/src/ui/MethodDecoding/methodDecodingStore.js
index 92c6d1096..3b5ccb5b0 100644
--- a/js/src/ui/MethodDecoding/methodDecodingStore.js
+++ b/js/src/ui/MethodDecoding/methodDecodingStore.js
@@ -118,15 +118,6 @@ export default class MethodDecodingStore {
       return Promise.resolve(result);
     }
 
-    const { signature, paramdata } = this.api.util.decodeCallData(input);
-    result.signature = signature;
-    result.params = paramdata;
-
-    // Contract deployment
-    if (!signature || signature === CONTRACT_CREATE || transaction.creates) {
-      return Promise.resolve({ ...result, deploy: true });
-    }
-
     return this
       .isContract(contractAddress || transaction.creates)
       .then((isContract) => {
@@ -136,6 +127,15 @@ export default class MethodDecodingStore {
           return result;
         }
 
+        const { signature, paramdata } = this.api.util.decodeCallData(input);
+        result.signature = signature;
+        result.params = paramdata;
+
+        // Contract deployment
+        if (!signature || signature === CONTRACT_CREATE || transaction.creates) {
+          return Promise.resolve({ ...result, deploy: true });
+        }
+
         return this
           .fetchMethodAbi(signature)
           .then((abi) => {