From fd98ec650a9034d0bb29decfa52a98f84aff2f01 Mon Sep 17 00:00:00 2001
From: Dereck <Chongxin.Luo@ibm.com>
Date: Thu, 2 Jul 2020 13:36:47 -0400
Subject: [PATCH] Add filepath check for invoke (#222)

Signed-off-by: Chongxin Luo <Chongxin.Luo@ibm.com>
---
 asset-transfer-basic/application-javascript/invoke.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/asset-transfer-basic/application-javascript/invoke.js b/asset-transfer-basic/application-javascript/invoke.js
index 8654c1d6..89c374cc 100644
--- a/asset-transfer-basic/application-javascript/invoke.js
+++ b/asset-transfer-basic/application-javascript/invoke.js
@@ -14,6 +14,10 @@ async function main() {
     try {
         // load the network configuration
         const ccpPath = path.resolve(__dirname, '..', '..', 'test-network', 'organizations', 'peerOrganizations', 'org1.example.com', 'connection-org1.json');
+        const fileExists = fs.existsSync(ccpPath);
+        if (!fileExists) {
+            throw new Error(`no such file or directory: ${ccpPath}`);
+        }
         let ccp = JSON.parse(fs.readFileSync(ccpPath, 'utf8'));
 
         // Create a new file system based wallet for managing identities.