Introducing OpenZeppelin Contracts v5.1

What is DeFi? An Introduction to Decentralized Finance

Learn about lending, collateral, loan to collateral ratio, protocol tokens, price oracles,...

Security Insights

Backdooring Gnosis Safe Multisig wallets

Disclosure of a severe attack vector in the deployment of the popular Gnosis Safe Multisig wallet....

Security Insights Zero-Day Vuln

Flash Loans and the Advent of Episodic Finance

Flash Loans have been making the rounds. Even if the concept has been around for a year or two,...

Security Insights

A Year of Research at OpenZeppelin

It's been a busy 2019 for our dearest Research team. These are the main highlights of the year!.

Security Insights

Review Summary of Bounties Network

We take a look at Bounties Network implementation of MetaTransactions and find two medium severity...

Security Insights

Changing the feedback experience using positive psychology

One of the topics we focused on at OpenZeppelin this year was feedback. We feel that giving and...

Security Insights

Reentrancy After Istanbul

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

Security Insights Products

GSN: The Ultimate Ethereum Onboarding Solution

Gas Station Network is an open-source service that allows developers to create unique decentralized...

Announcements Security Insights Products

Getting the most out of CREATE2

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

Security Insights

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...

Security Insights Products

Solidity Hot Reloading Using ZepKit

This post explains how to use ZepKit to enable hot reloading to save time when developing smart...

Security Insights Products

Technical Description of Critical Vulnerability in MakerDAO Governance

While working on an audit for the Coinbase team, we found a critical vulnerability in the DSChief...

Security Insights