Introducing OpenZeppelin Contracts v5.1

Follow this quality checklist before an audit

At OpenZeppelin we help protect the core infrastructure of open and decentralized applications. I’m...

Security Insights

Testing real-world contract upgrades

Deploying to production can be a stressful experience, especially if you don’t have a proper suite...

Security Insights Products

Zeppelin at ETHDenver: an upgradeable, linkable future!

¡Hola Zeppeliners! It’s that time again, when hackers, innovators, and Bufficorns converge on...

Events

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...

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...

Security Insights Products

EVM package deployment with ZeppelinOS—Part I

If you’re familiar with Node.js, then you will be familiar with NPM (Node Package Manager). You...

Products

Why I’m Building Zeppelin

The purpose of this post is to update my personal vision of Zeppelin and Zeppelin’s projects, as...

Announcements

State of EVM Packages – End of 2018

Two months ago, we presented the EVM package standard as a means to securely share on-chain...

Security Insights

RNDR Token Transfer Audit

The OTOY team asked us to review and audit their RNDR Token contracts. We looked at the code and...

Security Audits Solidity Token

Toward a secure code ecosystem

This week started off with the finding of malicious code injected into a dependency of a popular...

Security Insights

The transparent proxy pattern

Much has been discussed around proxy patterns and how to best achieve upgradeability in Ethereum...

Products

Solidity Compiler Audit

The Augur team and the Ethereum Foundation (through a joint grant) asked us to review and audit the...

Security Audits