This repository contains the source code for a tutorial on building an oracle using the Celo blockchain. The project demonstrates how to create a smart contract, an off-chain server to fetch data from a RESTful API, and a client-side application to display the data submitted to the Celo blockchain. By following the tutorial and exploring this repository, you can create your own oracle to securely provide off-chain data to your smart contracts.

• Getting Started
• Prerequisites
• Installation
• Usage
• Deployment
• Built With
• Contributing

Clone this repository to your local machine:

git clone https://github.com/your_username/celo-oracle.git

Before you begin, ensure you have the following software installed:

• Node.js
• Truffle Suite
• Celo Extension Wallet (Chrome extension)

Additionally, sign up for a free API key from OpenWeather API.

Navigate to the project directory and install the required packages:

cd celo-oracle
npm install

1. Update the privateKey and accountAddress variables in the server/index.js file with your own private key and MetaMask account address, respectively.
2. Update the OPEN_WEATHER_API_KEY variable in the server/index.js file with your OpenWeather API key.
3. Run the off-chain server:

cd server
npm start

Deploy the smart contract to the Celo Alfajores test network by running the following command in the project directory:

truffle migrate --network alfajores

• Celo
• Solidity
• Truffle Suite
• Node.js
• OpenWeather API
• Axios
• Web3.js

Pull requests are welcome! For major changes, please open an issue first to discuss what you would like to change.