Learn how to perform prime factorization in web3 programming languages. Put to test your optimization skills and find the largest prime factor of a given number.

Largest prime factor

FizzBuzz is a popular coding interview question used to test basic problem solving skills. Many web2 companies use it to quickly screen candidates. Solve the solution with the least amount of gas!

FizzBuzz

In this challenge you will be given an integer and you will have to find the closest Fibonacci number to it. It is a great way to practice your optimization skills - how much you will be able to squeeze out of the on-chain environment?

Your Fibonacci neighbor

Implement an on-chain integer sorting algorithm in Solidity with gas efficiency in mind. Use competitive programming and gas golfing techniques.

Sorting Algorithms in Solidity

Learn to compute the sum of even Fibonacci numbers in Solidity. Master efficient techniques to solve complex problems in smart contracts.

Even Fibonacci Sum

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.

Motoko Tutorial

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!

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

Introduction to ERC-721

Learn how to write asynchronous code on NEAR blockchain with NearPromise.

Asynchronous Programming on NEAR

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.

Introduction to Solidity

Get hands-on experience with NEAR blockchain and learn how to build a simple application using NEAR SDK for JavaScript.

Introduction to NEAR blockchain

Uncover and exploit security flaws in a social network's smart contract to steal tips from users.

Steal the Tips

Find and exploit a vulnerability in NEARTrade's smart contract, a NEAR-based trading platform, to steal funds.

NEARTrade Heist

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.

Introduction to Ethereum Swarm

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.

Build smart contracts on TON

A vulnerable flash loan contract has been deployed in the wild: will you be able to find the vulnerability before other black-hat hackers drain its funds under your nose? Learn how to hack vulnerable DeFi contracts, write a vulnerability report with your findings and win a EthPrague 2024 conference ticket! (Note: the bounty prize runs from 27.05.2024-31.05.2024 and it's only extended to the top three performers)

SideEntranceExploit

Get hands-on experience with Solana, emerging decentralized platform for building web3 applications.