Harry Papacharissiou

Blockchain Hackathon Tips for Building a Winning Submission

6 pro tips to help you build and submit a hackathon project that stands out from the competition and captures the judges’ attention.

Developers

Build a dApp on xDai Chain With Secure Data Feeds

Learn how Chainlink Price Feeds give developers access to secure and high-quality price data when building scalable and economically stable dApps on xDai Chain.

Developers

How to Get a Random Number on Polygon

Learn how to use Chainlink VRF to request a provably random number on Polygon’s highly scalable Proof of Stake chain.

Developers

How to Use Chainlink With Hardhat

Hardhat offers a feature-rich development environment for Ethereum developers. In this tutorial, we walk through how to get started with Chainlink using Hardhat for fetching external data in your smart contracts and more.

How to Fetch the Current Price of Ethereum, Bitcoin, and Other Cryptocurrencies in Solidity

In this technical tutorial, learn how to use Chainlink Price Feeds to obtain real-time cryptocurrency price data in your smart contract.

Developers

Using Chainlink Oracles on Polygon

Learn how to build a scalable DeFi dApp with secure price feeds by using Chainlink’s decentralized oracles on the Matic Network.

Developers

How to Build a Parametric Insurance Smart Contract

In this technical tutorial, learn how to use Chainlink nodes and Price Feeds to build a Solidity smart contract for a parametric crop insurance product.