Developer Quickstart
With Scroll, your favorite tools for building and testing smart contracts just work.
Since Scroll is bytecode equivalent with the EVM, you’ll just need to point your favorite builder tools at a Scroll Alpha Testnet RPC Provider.
Use the table below for configuring your Ethereum tools to the Scroll Alpha Testnet.
Network Name | Scroll Alpha Testnet | Goerli test network |
|---|---|---|
RPC URL | ||
Chain ID | 534353 | 5 |
Currency Symbol | ETH | ETH |
Block Explorer URL |
Modify your Hardhat config file
hardhat.config.ts to point at the Scroll Alpha Testnet public RPC....
const config: HardhatUserConfig = {
...
networks: {
scrollAlpha: {
url: "https://alpha-rpc.scroll.io/l2" || "",
accounts:
process.env.PRIVATE_KEY !== undefined ? [process.env.PRIVATE_KEY] : [],
},
},
};
...
To deploy using the Scroll Alpha Testnet Public RPC, run:
forge create ... --rpc-url=https://alpha-rpc.scroll.io/l2After compiling your contracts, the easiest way to deploy using Remix is by setting up Metamask, then selecting the Scroll Alpha Testnet network.
Metamask with the Scroll Alpha Testnet selected as Network
Now, in the “Deploy and Run Transactions” tab, use the “Environment” drop down and select “Injected Provider - MetaMask.”
Remix using MetaMask as a Network Provider for accessing the Scroll Alpha Testnet
Connect your wallet and select the Scroll Alpha Testnet. Your account should be selected automatically in Remix, and you can click “Deploy.”
Assuming you already have a truffle environment setup, go to the Truffle configuration file,
truffle.js. Make sure to have installed HDWalletProvider: npm install @truffle/[email protected]const HDWalletProvider = require("@truffle/hdwallet-provider")
...
module.exports = {
networks: {
scrollAlpha: {
provider: () =>
new HDWalletProvider(process.env.PRIVATE_KEY, "https://alpha-rpc.scroll.io/l2"),
network_id: '*',
},
}
}
To add the Scroll Alpha Testnet, run the following command:
brownie networks add Ethereum scrollAlpha host=https://alpha-rpc.scroll.io/l2 chainid=534353
To set this as your default network, add the following in your project config file:
networks:
default: scrollAlpha
Setting up a Scroll Alpha Testnet provider in an
ethers script:import { ethers } from 'ethers';
const provider = new ethers.providers.JsonRpcProvider(
'https://alpha-rpc.scroll.io/l2'
);
To deploy using Scaffold-eth, you’ll need to point both your Hardhat and React settings at the Scroll Alpha Testnet.
In the
packages/hardhat/hardhat.config.js file, you’ll add the network and select it as the default network....
//
// Select the network you want to deploy to here:
//
const defaultNetwork = "scrollAlpha";
...
module.exports = {
...
networks: {
...
scrollAlpha: {
url: "https://alpha-rpc.scroll.io/l2",
accounts: {
mnemonic: mnemonic(),
},
},
}
...
}
Be sure to fund the deployment wallet as well! Run
yarn generate to create the wallet and yarn account to check its funds. Once funded, run yarn deploy --network scrollAlpha to deploy on the Alpha testnet.On some project forks, you'll want to disable the contract verification which relies on Etherscan. This can be commented out in
packages/hardhat/deploy/00_deploy_your_contract.jsTo configure your frontend, you need to add the Scroll Alpha Testnet as a network option, then select it as default.
To add the network, modify
packages/react-app/src/constants.js ....
export const NETWORKS = {
...
scrollAlpha: {
name: "scrollAlpha",
color: "#e9d0b8",
chainId: 534353,
rpcUrl: "https://alpha-rpc.scroll.io/l2",
blockExplorer: "https://blockscout.scroll.io",
},
...
}
Next, in
packages/react-app/src/App.jsx modify...
/// 📡 What chain are your contracts deployed to?
const initialNetwork = NETWORKS.scrollAlpha;
...