Ethers.js: How do I connect to Ganache (formerly TestRPC)?

[moshebeeri]

Hi,

I am using ethers to connect to local ganache testnet, getting wrong balance.

  getBalance(privateKey) {
    return new Promise((resolve, reject) => {
      if(!privateKey) {
        return reject(new Error('no privateKey'));
      }
      const wallet = new ethers.Wallet(privateKey);
      wallet.provider = ethers.providers.getDefaultProvider(providers.networks.testnet);
      console.log('getting balance');
      let balancePromise = wallet.getBalance(/*address*/);
      balancePromise
                .then(balance => {
                  console.log(`resolve(${balance})`);
                  resolve(balance.toString());
                })
                .catch(err => reject(err));
    });
  }

Running ganache-cli:
ganache-cli -b 3

Then running this code from post man results to zero balance

While the true balance showed in MetaMask is 100 eth

It looks like a bug to me, but I may be missing something or it just maybe ganache-cli issue,
Any Idea?

[ricmoo]

The default provider for “testnet” is Ropsten, not a local Dev network. You probably want to use new ethers.providers.JsonRpcProvider(“http://localhost:8545”, ethers.networks.unspecified);

If you are using v4 you can just use new ethers.providers.JsonRpcProvider() and it will automatically detect the network.

Let me know if that still doesn’t work for you.

[moshebeeri]

Thanks that's worked using v 4.0

  getBalance(privateKey, address) {
    return new Promise((resolve, reject) => {
      if(!privateKey) {
        return reject(new Error('no privateKey'));
      }
      let provider = new ethers.providers.JsonRpcProvider();
      let balancePromise = provider.getBalance(address);
      balancePromise
                .then(balance => {
                  resolve(ethers.utils.formatEther(balance));
                })
                .catch(err => reject(err));
    });
  }

[ricmoo]

Sounds like everything is working now, I'm closing this now. If you are still having problems, please feel free to re-open the issue.