0xHack 2021: Chainlink Bounty Winners

We’re excited to announce the Chainlink bounty winners from the 0xHack 2021 Hackathon. These winning projects presented new advanced smart contract applications that leveraged a variety of Chainlink oracle network solutions, such as Chainlink Price Feeds for fetching tamper-proof market data, Chainlink VRF for provably fair blockchain gaming, and External Adapters for delivering FitBit data … Read more

Announcing the Summer 2021 Smart Contract Developer Bootcamp

We’re excited to announce that registration is now open for Chainlink’s Summer 2021 Smart Contract Developer Bootcamp! To help accelerate the continued wave of innovation and adoption in the smart contract ecosystem, our developer bootcamp will give developers across the globe a hands-on, guided experience to begin building with Solidity smart contracts and Chainlink oracles … Read more

Web3 Weekend Hackathon 2021: Chainlink Bounty Winners

We’re excited to announce the Chainlink bounty winners from ETHGlobal’s recent Web3 Weekend Hackathon 2021. These projects brought advanced smart contract use cases to life using a range of Chainlink oracle network functionality, including External Adapters to store data on IPFS nodes, Chainlink Price Feeds, and Chainlink VRF. This group of winners showcases how Chainlink … Read more

Build a Real Estate dApp With Chainlink Oracles

Smart contract developers can use Chainlink oracles to obtain real estate valuations directly on-chain, enabling new DeFi products and markets for the real estate industry. Decentralized Finance (DeFi) has already shown how a wide range of cryptocurrencies, commodities, indices, stocks, and more can be represented on-chain as NFTs backed by real off-chain assets or collateralized … Read more

Blockchain Fintech Tutorial: Lending and Borrowing With Python

Prerequisites: *This tutorial is for anyone with a little familiarity with Python, and little to no Solidity/smart contract experience. * Introduction The classic fintech world is full of tools that enable a user to make sophisticated algorithmic trading models and systems. The decentralized finance (DeFi) world offers users and developers those very same tools, with … Read more

Build a Blockchain-Based Fantasy Sports Game Using a Chainlink External Adapter

At the 2021 ETHDenver Hackathon, Chainlink Bounty Winner Pr!ce used a Chainlink External Adapter to connect off-chain NBA player performance data to a Chainlink oracle for powering a blockchain-based fantasy sports game. This marketplace model can also be applied to other zero-sum performance assets and is a great demonstration of how Chainlink’s configurable and secure … Read more

How to Calculate Price Volatility for DeFi Variance Swaps

For his prize-winning Chainlink hackathon submission, smart contract developer Max Feldman used Chainlink Price Feeds to calculate on-chain price volatility for a variance swap DeFi product. In this tutorial, Max explains how to calculate volatility from Chainlink Price Feeds and use this data to trigger smart contract derivatives, showcasing yet another example of how decentralized … Read more

Fetch IPFS Data in Smart Contracts Using a Chainlink External Adapter

Using Chainlink External Adapters to connect various components of decentralized infrastructure is one of the ways the Chainlink Network is helping to make it easier for smart contract developers to build new use cases and fully decentralized applications. Chainlink Prize winners from the ETHOnline Hackaton Toshiake Takase and Tsukasa Noguchi used Chainlink’s oracle infrastructure and … Read more

Off-Chain Computation: Statistical Analysis With Chainlink

As the world discovers the expanding possibilities of smart contracts, transaction volume across blockchains is seeing an exponential increase. Along with this surge of adoption, developers are continuously expanding what smart contracts can process and compute. Between the rapidly growing use and complexity of smart contracts, secure off-chain computation is becoming an increasingly important service … Read more

Chainlink Developers Starter Kit Showcase

We’re excited to announce the Chainlink Developers Starter Kit Showcase, a developer-focused initiative that will run throughout the month of May. Over the next month, we encourage you to experiment with our Starter Kits, either by building smart contracts that use Chainlink Price Feeds, VRF, or Any-API functionality, or by improving the Starter Kits in … Read more