diff --git a/vault.js b/vault.js
index 4d17b7a..48b2020 100644
--- a/vault.js
+++ b/vault.js
@@ -7,10 +7,12 @@ import {newContract} from "./contract.js";
 
 
 export function vaultAddress(chainId, owner, num=0) {
+    if (!chainInfo[chainId].factory)
+        return null
     try {
         const salt = ethers.solidityPackedKeccak256(['address','uint8'],[owner,num])
         const result = ethers.getCreate2Address(chainInfo[chainId].factory, salt, chainInfo[chainId].vaultInitCodeHash)
-        // console.log('vaultAddress', chainId, owner, num, chainInfo[chainId].factory, salt, VAULT_INIT_CODE_HASH, result)
+        // console.log('vaultAddress', chainId, owner, num, chainInfo[chainId].factory, chainInfo[chainId].vaultInitCodeHash, result)
         return result
     }
     catch (e) {