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  • How to Connect a Two-Factor Authentication (2FA) API to a Smart Contract With Chainlink
    Developers

    How to Connect a Two-Factor Authentication (2FA) API to a Smart Contract With Chainlink

    Chainlink hackathon winner Digital Bridge walks through how they built a two-factor authentication service to trigger on-chain events using Chainlink oracles.

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    Dynamic NFTs with Hardhat
    Developers

    Build Your Own Dynamic NFT With Hardhat

    Now that NFTs have burst into the mainstream, developers, gamers, and collectors alike are starting to explore how these unique digital assets can take on new functionalities and unlock even richer in-app dynamics. In our past tutorials, we have walked through how to use Chainlink oracles to build, deploy, and sell NFTs that are verifiably…

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    Craft Whiskey Crypto Payments With Chainlink Oracles
    Developers

    Craft Whiskey Crypto Payments With Chainlink Oracles

    For their Chainlink bounty-winning submission at the 2021 ETHGlobal MarketMake Hackathon, Jasper and Tillman Degens created Whiskey MarketMaker, a DeFi platform that leverages Chainlink oracles to enable small-batch whiskey distilleries to tokenize and list maturing bottles of whiskey for investors, while also allowing distilleries to earn interest on ETH earned from sales via an Aave…

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    Congratulations to the Spring 2021 Chainlink Virtual Hackathon Winners
    Developers

    Congratulations to the Spring 2021 Chainlink Virtual Hackathon Winners

    The Spring 2021 Chainlink Hackathon saw record-breaking developer turnout, with 4,000+ signups, 140+ project submissions, and participants hailing from 170+ countries and multiple blockchains across the ecosystem. Developers of all experience levels and technical backgrounds came together to discover the broad capabilities of Chainlink’s oracle infrastructure and build a wide range of hybrid smart contracts…

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    A banner showing how to fetch index prices in Solidity smart contracts.
    Developers

    Get Index Prices in Solidity Smart Contracts

    Learn how to use Chainlink’s Index Price Data Feeds to retrieve highly reliable crypto and traditional index pricing in Solidity smart contracts.

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    A banner entitled "How to Build a Winning Hackathon Submission"
    Developers

    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.

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    Developers

    Build a dApp on xDai Chain With Secure Data Feeds

    In this technical tutorial, learn how to use Chainlink Price Feeds to fetch secure price data when building scalable dApps on xDai’s layer-2 sidechain.

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    Learn how to get a random number of Polygon.
    Developers

    How to Get a Random Number on Polygon

    Learn how to use Chainlink VRF to request a random number in smart contracts deployed to Polygon’s Proof of Stake (PoS) sidechain.

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    Congratulations to the ETHDenver 2021 Hackathon Chainlink Bounty Winners
    Developers

    Congratulations to the ETHDenver 2021 Hackathon Chainlink Bounty Winners

    Read how these winning projects from the 2021 ETHDenver Hackathon used Chainlink oracles to build innovative dApps around NFTs, identity verification, and more.

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    Chainlink Bounty Winners: ETHGlobal 2021 MarketMake Hackathon
    Developers

    Chainlink Bounty Winners: ETHGlobal 2021 MarketMake Hackathon

    Announcing the Chainlink bounty winners from the 2021 ETHGlobal MarketMake Hackathon. Read how these projects leveraged Chainlink to securely interact with off-chain resources.

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