- Clone the repo and cd into it
git clone https://github.com/symfoni/hardhat-react-boilerplate.git MyProject && cd MyProject - Install deps with yarn
yarnor npmnpm install - Start hardhat
npx hardhat node --watch
It runs up a Hardhat node, compile contracts, generates typescript interfaces, creates React context and instantiates your contract instances and factories with frontend provider.
- Open up a new terminal
cd frontend- Install deps with yarn
yarnor npmnpm install - Import seed phrase in Metamask. The default mnemonic currently used by hardhat is
test test test test test test test test test test test junk - Ensure Metamask RPC is set to http://localhost:8545.
- Start React app with yarn
yarn startor npmnpm start. The frontend should start up at http://localhost:3000/.
Because of this default hardhat.config.ts it will first try to connect with an injected provider like Metamask (web3modal package does this).
If nothing found it will try to connect with your hardhat node. On localhost and hardhat nodes it will inject your mnemonic into the frontend so you have a "browser wallet" that can both call and send transactions. NB! Dont ever put a mnemonic with actual value here. We will limit this feature going forward so its more explicit.
const config: HardhatUserConfig = {
react: {
providerPriority: ["web3modal", "hardhat"],
},
};You may also need to set the chainID to 1337 if you are useing Hardhat blockchain development node.
eth_sendRawTransaction
Invalid nonce. Expected X but got X.Reset your account in Metamask.