How do I connect to Ganache with ethers?

Question

const ethers = require("ethers");
const fs = require("fs-extra");

async function main() {
  // http://127.0.0.1:7545
  // Compile in our code
  // Compile them seperately
  const provider = new ethers.JsonRpcProvider("http://127.0.0.1:7545");
  const wallet = new ethers.Wallet(
    "0x578f756dd1e637bb78dff004cff8517f384f3be491cce3147e4a4f53bcbb8396",
    provider
  );
  const abi = fs.readFileSync("./SimpleStorage_sol_SimpleStorage.abi", "utf8");
  const binary = fs.readFileSync("SimpleStorage_sol_SimpleStorage.bin", "utf8");
  const contractFactory = new ethers.ContractFactory(abi, binary, wallet);

  console.log("Deploying, please wait...");
  const contract = await contractFactory.deploy(); 
  console.log(contract);
}

main()
  .then(() => process.exit(0))
  .catch((error) => {
    console.error(error);
    process.exit(1);
  });

The Error is:

JsonRpcProvider failed to `startup; retry in 1s Error: connect ECONNREFUSED 127.0.0.1:7545 at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1494:16) { errno: -111, code: 'ECONNREFUSED', syscall: 'connect', address: '127.0.0.1', port: 7545

I thought maybe port 7545 was closed so I ran the netstat command and it seems to be open and listening. I'm a little lost. Any help is much appreciated!

This is what I got from the netstat command: [Ganache.exe] TCP 127.0.0.1:51068 DEV33:7545 ESTABLISHED [Ganache.exe] TCP 127.0.0.1:51073 DEV33:7545 ESTABLISHED [Ganache.exe] TCP 127.0.0.1:51074 DEV33:7545 ESTABLISHED [Ganache.exe] TCP 172.17.144.1:139 DEV33:0 LISTENING — LoganL33, Mar 15 '23 at 02:52

score 1 · Answer 1 · edited Apr 02 '23 at 09:09

1

My Problem Is solve by changing the ganache server to wifi and try this port 8545; First Change the ganache server by go to setting and then go to server tab. and try this port with jsonRpcProvider function/ http://192.168.100.9:8545 Try This And You Error Will Be Fixed.

edited Apr 02 '23 at 09:09

Mike Szyndel

10,461
10
47
63

answered Mar 28 '23 at 16:56

Muhammad Azam

11
1

Alvin Lim · Answer 2 · 2023-04-14T03:59:32.333

1

On Mac m2 on Ventura OS, in the Ganache app, go to settings -> server -> change the hostname of the Ganache server to 192.168.10.128. screenshot

edited Apr 14 '23 at 03:59

answered Apr 14 '23 at 03:56

Alvin Lim

11
2

score 0 · Answer 3 · answered Mar 29 '23 at 22:49

for anyone who is taking the free code camp / pat collins course (or anyone on a WSL + Ganache setup really) you're going to want to edit the ganache server settings (top right gear icon>server tab) to go by vEthernet http://172.24.240.1 so your ganache and ethers can connect

score 0 · Answer 4 · answered Apr 05 '23 at 14:39

As a fork of Flasgod's answer:

I am working through the free code camp / pat collins course and I'm working in the WSL environment.

Switching to the vEthernet server inside of ganache (top right gear icon>server tab) did not work for me. I believe this is because I am trying to run my deploy code inside the WSL: Ubuntu environment while ganache is running on my Windows desktop. They couldn't connect to each other.

Solution:

Follow these directions from the truffle/ganache github to install and use ganache in the WSL command line.
- This way, ganache is running inside the WSL environment along side the deploy code.
run ganache in the WSL command line.
Use the private key and "listening on" ip displayed in the terminal.
- ip should still be formatted "http://x.x.x.x:xxxx" in the code.
Open up a new terminal window so ganache continues to run in the first window.
run node deploy.js

This solved my problem.

How do I connect to Ganache with ethers?

4 Answers4