Guides

Reentrancy After Istanbul

How to protect your contracts against reentrancy after Ethereum’s Istanbul hard fork.

Build your app with the Gas Station Network

The Gas Station Network, or GSN for short, is a decentralized solution for solving user onboarding to Ethereum applications. It allows you as an app developer to pay for your users' transactions...

Getting the most out of CREATE2

In this post, we’ll go in depth into the CREATE2 opcode and its uses in counterfactual...

Sign it like you mean it: creating and verifying Ethereum signatures

Recently, Zeppelin announced that it had joined the Gas Station Network Alliance, a new group focused on the standardization of Meta-transactions for the Ethereum network.

Solidity Hot Reloading Using ZepKit

​​​​ZepKit provides a great start for DApp development on Ethereum. Today, we are happy to announce the release of Solidity Hot Reloading to help make your process even more comfortable and more…

Getting started with ZepKit

The ZeppelinOS ZepKit is designed to be a one-stop shop for getting started with developing secure, upgradable smart contracts and EVM packages.

Building Blocks: What makes a good EVM package?

A mental shortcut for thinking about EVM packages is to compare them to a package manager such as NPM. Package managers serve as convenient repositories for code that you can easily reuse and share…

Testing real-world contract upgrades

Deploying to production can be a stressful experience, especially if you don’t have a proper suite of tests to ensure that what you built will run smoothly.

EVM package deployment with ZeppelinOS—Part III

Now that you’ve created your first EVM package, let’s go through the steps you would take to link it to your project as if you were linking directly from NPM. These commands you already know, so I’ll…

EVM package deployment with ZeppelinOS—Part II

In this section, we’ll make sure the contract we’ve deployed to our local network works by testing directly against it in Truffle Console. Once we’re happy it works, we’ll publish to the mainnet and…