OracleReader based on Scaffold-ETH 2

To run this example, which uses the Foundry tooling, we first need to fork the Sepolia network.

In a terminal window do

export ETH_RPC_URL='https://your-sepolia-rpc-server/etc'
yarn chainsep

In a second terminal window do

export DEPLOYER_PRIVATE_KEY="0xdeadbeefcafebabe"
cd packages/foundry
cp .env.example .env
yarn deploy

when this completes, you should be see a contract address in the output:

...
##### sepolia
✅  [Success]Hash: 0xda5b4871929d1414a5b447769f4d8d757b1aea8e280555adb9dd7ec67bb6b683
Contract Address: 0xA2B4473120b9d18abfE90EEb2722A57CB72C4212

Now, you can verify that you can read with the Foundry cast command:

🦄 cast call 0xA2B4473120b9d18abfE90EEb2722A57CB72C4212 'read()(uint)'
3319415000000000000000 [3.319e21]

Note that because this is a fork of the Sepolia network, you should be getting a pretty up-to-date value for ETH/USD.

🏗 Scaffold-ETH 2 [ORIGINAL README]

Documentation | Website

🧪 An open-source, up-to-date toolkit for building decentralized applications (dapps) on the Ethereum blockchain. It's designed to make it easier for developers to create and deploy smart contracts and build user interfaces that interact with those contracts.

⚙️ Built using NextJS, RainbowKit, Foundry, Wagmi, Viem, and Typescript.

• ✅ Contract Hot Reload: Your frontend auto-adapts to your smart contract as you edit it.
• 🪝 Custom hooks: Collection of React hooks wrapper around wagmi to simplify interactions with smart contracts with typescript autocompletion.
• 🧱 Components: Collection of common web3 components to quickly build your frontend.
• 🔥 Burner Wallet & Local Faucet: Quickly test your application with a burner wallet and local faucet.
• 🔐 Integration with Wallet Providers: Connect to different wallet providers and interact with the Ethereum network.

Requirements

Before you begin, you need to install the following tools:

• Node (>= v18.17)
• Yarn (v1 or v2+)
• Git

Quickstart

To get started with Scaffold-ETH 2, follow the steps below:

1. Install dependencies if it was skipped in CLI:

cd my-dapp-example
yarn install

2. Run a local network in the first terminal:

yarn chain

This command starts a local Ethereum network using Foundry. The network runs on your local machine and can be used for testing and development. You can customize the network configuration in packages/foundry/foundry.toml.

3. On a second terminal, deploy the test contract:

yarn deploy

This command deploys a test smart contract to the local network. The contract is located in packages/foundry/contracts and can be modified to suit your needs. The yarn deploy command uses the deploy script located in packages/foundry/script to deploy the contract to the network. You can also customize the deploy script.

4. On a third terminal, start your NextJS app:

yarn start

Visit your app on: http://localhost:3000. You can interact with your smart contract using the Debug Contracts page. You can tweak the app config in packages/nextjs/scaffold.config.ts.

Run smart contract test with yarn foundry:test

• Edit your smart contract YourContract.sol in packages/foundry/contracts
• Edit your frontend homepage at packages/nextjs/app/page.tsx. For guidance on routing and configuring pages/layouts checkout the Next.js documentation.
• Edit your deployment scripts in packages/foundry/script

Documentation

Visit our docs to learn how to start building with Scaffold-ETH 2.

To know more about its features, check out our website.

Contributing to Scaffold-ETH 2

We welcome contributions to Scaffold-ETH 2!

Please see CONTRIBUTING.MD for more information and guidelines for contributing to Scaffold-ETH 2.