From 918a435a56548e31ad06a45dd2b2ebece035ab75 Mon Sep 17 00:00:00 2001
From: Leonid Beder <leonid.beder@gmail.com>
Date: Mon, 14 Dec 2020 22:19:18 +0200
Subject: [PATCH] Handle gracefully failure to retrieve `net_version`

---
 lib/forking/forked_blockchain.js | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/lib/forking/forked_blockchain.js b/lib/forking/forked_blockchain.js
index 68f175a937..d3a87cc8e7 100644
--- a/lib/forking/forked_blockchain.js
+++ b/lib/forking/forked_blockchain.js
@@ -171,9 +171,13 @@ ForkedBlockchain.prototype.initialize = async function(accounts, callback) {
     const forkVersion = await new Promise((resolve, reject) => {
       this.web3.eth.net.getId((err, version) => {
         if (err) {
-          Error.captureStackTrace(err);
-          err.message = `The fork provider errored when checking net_version: ${err.message}`;
-          reject(err);
+          if (this.options.network_id) {
+            resolve(this.options.network_id);
+          } else {
+            Error.captureStackTrace(err);
+            err.message = `The fork provider errored when checking net_version: ${err.message}`;
+            reject(err);
+          }
         } else {
           resolve(version);
         }