Hardhat Scripts – How to Use Multiple Networks in a Single Script

hardhathardhat-deploy

I have a piece of code that deploys a contract. I would like to deploy this contract to two networks (lets say Goerli and MainnetEthereum). Inside a loop in hardhat script I can change the network using the following code:

for (const currNetwork of networksToDeploy) {
   hre.changeNetwork(currNetwork);
   const DToken = await DToken.deploy(...constructorArgs)
}

The network doesn't change, it double deploys it in Goerli (the first network). The loop is changing correctly but the provider on DToken.deploy stays the same. Any ideas on how to change that?

Best Answer

You need to instantiate two Wallets.

https://docs.ethers.org/v5/api/signer/#Wallet-constructor

To create a Wallet you need to provide a private key and a provider (if desired) to instantiate a wallet.

new ethers.Wallet( privateKey [ , provider ] )

Here is an example code to instantiate two wallets:

const walletGoerli = new ethers.Wallet(privateKey, goerliProvider);
const walletMumbai = new ethers.Wallet(privateKey, mumbaiProvider);

Example

If myTask is defined like this example:


task("myTask", "Prints the network name and a foo arg")
  .addOptionalParam("foo", "Will be printed if defined")
  .setAction(async ({foo}, { ethers, network }) => {

    console.log(` * network: ${network.name}`);
    if (foo) {
    console.log(` * foo: ${foo}`);
  }

  return {
    foo,
    network: network.name,
  };
});

$ hh console --network localhost
Welcome to Node.js v14.xx.xx.
Type ".help" for more information.
> const res = await run('myTask', {foo: "bar"})
 * network: localhost
 * foo: bar
undefined
> res
{ foo: 'bar', network: 'localhost' }

Deploying Smart Contracts – Changing Deployment Address in Ethers and Hardhat Local Network

First, specify the private key of the account you want to use and then connect to the contract to deploy it with such wallet.

const main = async () => {
   const signer = new ethers.Wallet(your_private_key_string);
   const BFactory = await ethers.getContractFactory('B');
   const b = await BFactory.connect(signer).deploy({
    value: ethers.utils.parseEther('0.1'),
   });

  await b.deployed();

  console.log('Contract deployed to:', b.address);

  await b.onlyMe();
}

Best Answer

Related Solutions

Solidity – How to Run a Defined Hardhat Task Inside the Hardhat Console

Example

Deploying Smart Contracts – Changing Deployment Address in Ethers and Hardhat Local Network

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