Developers

In this technical tutorial, learn how to use Chainlink Price Feeds to obtain real-time Foreign Exchange (FX) price data in your smart contract.

This developer tutorial from Chainlink Virtual Hackathon winner Ted Nivan explains how to use Chainlink to convert a vending machine to accept payments in ETH.

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.

In this technical tutorial from Chainlink Virtual Hackathon winners, learn how to call marine water level data to a parametric insurance smart contract using a Chainlink External Adapter.

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

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.

This developer tutorial explains how to connect to the Twitter API via Chainlink so you can trigger tweets directly from a smart contract.

Learn how to use Chainlink VRF to generate a random number in a Solidity smart contract and build provably unpredictable outcomes into your Ethereum dApp.

Always test before you deploy. This tutorial covers how to test Chainlink smart contracts in Solidity and JavaScript using testnets, mocks, helper functions, and more.

This tutorial explains how a Chainlink node and External Adapter can be used to integrate a smart contract with an RFID scanner.

This tutorial explains how a Chainlink node and External Adapter can be used to integrate a smart contract to a Tesla vehicle.

This tutorial walks through the development of a simple exchange for call options using Chainlink Price Feeds and covers a multitude of Solidity topics in the process.

Chainlink external adapters make it easy to connect API authentication processes to smart contracts. Here’s an example with the Reddit API and Twitter API, which each require OAuth.

Many smart contracts on Ethereum require an external source of timing to trigger an on-chain action. We show you how your dApp can implement simple time-gated voting using the Chainlink Alarm Clock oracle, enabling blockchain voting in protocols such as DAOs.

Data Vendors and API Providers can sell their data to any blockchain network through a single integration with Chainlink, allowing them to monetize their data for the growing smart contact economy by selling it to the Chainlink Network or providing signed data.

Chainlink offers smart contract developers powerful oracle capabilities, such as decentralized price feeds, access to any API, and verifiable randomness.

As part of research conducted at Chainlink Labs, Chainlink is introducing the Fair Sequencing Service. FSS uses oracle networks for fair ordering of transactions sent to a particular smart contract, helping alleviate problems around frontrunning, high gas fees, & miner extractable value.