Audits Beyond Code: Tips for Optimizing Smart Contract Gas Costs

Smart contracts can get very expensive. Here are some tips on how to minimize their gas cost and make them both cheaper to deploy and cheaper to use.

Lisk Vulnerability: How to Steal Millions in 2^64 Operations

Lisk has a critical vulnerability which lets you steal millions - if you have millions

EthQL: Exploring the Ethereum Blockchain through GraphQL

GraphQL is a powerful relationship-focused database often used by social networks like Facebook. What if we could search Ethereum like that, too? We can!

Developing for Ethereum: Getting Started with Ganache

How to start developing for Ethereum safely and quickly? What is Ganache and how can it help? How do we set up virtual blockchains and connect tools to it?

What Is an Ethereum Testnet and How Is It Used?

What is an Ethereum testnet? How do we use Ropsten, Kovan, or Rinkeby and what for? What's a private blockchain good for and what is Testrpc?

What’s the Difference between Proof of Work (PoW), Proof of Stake (PoS), and Delegated...

PoW, PoS, dPoS, what is all this nonsense? Isn't it all just mining anyway? Read this post to learn the difference between these approaches.

Conquer Ethereum with Capture the Ether, an Ethereum Hacking Game!

Capture the Ether is a Solidity game in which you go through challenges to learn about coding and hacking Solidity, as well as how to avoid common pitfalls

How to Call Ethereum Smart Contract Functions

Some deployed Solidity smart contracts have functions. In this guide we'll show you how to call those functions and talk to the blockchain.

Solidity Development Crash Course: Finishing the Raffle Project

Let's finish the blockchain raffle project - we'll write our random number generation function, pick the winners, and send the collected money out.

Solidity Development Crash Course: Building a Blockchain Raffle

In this tutorial we'll start building a raffle on the blockchain with unique entries and an entrance fee. Earnings will be donated to charity!