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Catalog


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Building an app with the Lisk SDK

Course
beginner

Lisk is a blockchain application platform that lowers the barriers to entry to blockchain development by using Javascript as its language of choice to develop modular blockchain applications.

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Introduction to ERC-721

Course
beginner

In this Solidity course you will learn how to build a simple NFT implementation of the ERC-721 standard using the OpenZeppelin library.

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Introduction to Solidity

Course
beginner

Solidity is the most popular language to develop smart contracts on Ethereum and other EVM-compatible blockchains. In this course you will get familiar with Solidity syntax and features.

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Introduction to Oracles: Chainlink

Course
beginner

Chainlink is the most widely used decentralized oracle network on Ethereum. Chainlink-powered oracles allow to bridge off-chain data source to on-chain contracts.

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Build smart contracts on TON

Course
advanced

FunC is the main language for writing smart contracts on the Ton blockchain. Learn how to leverage its features to build on-chain applications that can reach Telegram's massive userbase.

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Introduction to Ethereum Swarm

Course
beginner

Ethereum Swarm is a decentralized network for storing and sharing data. . Learn to efficiently store, retrieve, and share data in this interactive coding course using the `@ethersphere/bee-js` Javascript library.

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Motoko Tutorial

Course
beginner

Motoko is the language of choice for writing smart contracts for the Internet Computer. This comprehensive tutorial covers most of the language you will need to write your applications.

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FizzBuzz

Challenge
beginner

FizzBuzz is a popular coding interview question used to test basic problem solving skills. Many web2 companies use it to quickly screen candidates. Practice here to ace your next interview!

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Burn LSK tokens

Challenge
beginner

Burn LSK tokens to prevent spammers from overwhelming your blockchain application.

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Introduction to NEAR blockchain

Course
beginner

Learn the basics of the NEAR blockchain and how to build smart contracts using the NEAR JavaScript SDK in this introductory course, tailored for those familiar with TypeScript.

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Vulnerable Transfer

Challenge
beginner

Dive into the transfer tokens contract challenge. Your mission is to identify a severe vulnerability and fix it.

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Data serialization

Challenge
beginner

Demonstrate your Lisk proficiency by designing a schema for a complex data structure.

Level
Chains
Languages
Level
Chains
Languages