Introducing OpenZeppelin Contracts v5.1

A Gentle Introduction to Ethereum Programming, Part 2

This is the second part of our Ethereum introduction guide. If you haven’t read part 1, I highly...

Security Insights

A Gentle Introduction to Ethereum Programming, Part 1

Two months ago I was asked to build an Ethereum web application as a work test to join Zeppelin,...

Security Insights

ZeppelinOS Development Roadmap: Part One

We’ve already discussed the technical details of ZeppelinOS and published a first draft of the...

Announcements Products

Evolution of Smart Contract Security in the Ethereum Ecosystem

In May of 2016, Peter Vessenes analyzed a sample of smart contracts published online to assess...

Security Insights

How the ZEP Token Powers ZeppelinOS

ZeppelinOS is an operating system designed specifically for smart contracts. It’s an open-source,...

Announcements Products

Ripio Token Audit

The Ripio team asked us to review and audit their Ripio Credit Network Token (RCN) and crowdsale...

Security Audits

Thin Protocols

In 2016 Joel Monegro wrote a blogpost titled “Fat Protocols”. In his blogpost he argues that while...

Security Insights

Technical Details of ZeppelinOS

ZeppelinOS aims to solve this problem. Based on our experience working to secure dozens of projects...

Products

Introducing zeppelinOS: the operating system for smart contract applications

In the early days of computing, writing code into machines was a difficult and inefficient...

Announcements Products

Setting Up a Bug Bounty Smart Contract with OpenZeppelin

The effect of having a market cap north of $10 Billion USD is that a growing number of blockchain...

Products

OpenZeppelin now supports ethpm

As of today, OpenZeppelin is an ethpm package, following the ERC190, Ethereum Smart Contract...

Announcements Products

Proxy Libraries in Solidity

We recently read some articles about neat tricks and hacks one can do in Solidity. Specifically,...

Products