Introducing OpenZeppelin Contracts v5.2 and OpenZeppelin Community Contracts

Contracts v5.2 runs parallel to more experimental development hosted in the community-owned OpenZeppelin Community Contracts library. Thils more experimental version aims for quicker iteration on the ...

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

Security Insights

In this deep dive into low-level EVM code, you will learn how to code a Minimal Proxy (EIP 1167)...

Products

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

Security Insights

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

Security Insights

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

Security Insights Products

The Compound team asked us to audit a patch of their smart contract code. We examined the code and...

Security Audits Solidity Lending

We are excited to collaborate with Microsoft and announce the launch of the OpenZeppelin Audited...

Announcements

Micah Zoltu asked us to review and audit the recoverable wallet smart contract code. We looked at...

Security Audits

The InstaDApp team asked us to audit their proxy wallet and wallet registry contracts. We examined...

Security Audits

We describe a vulnerability in the Move IR compiler whereby inline comments can be disguised as...

Security Audits

We found a problem in Libra’s intermediate representation language compiler, the Move IR, that...

Security Audits

The YouNow team asked us to review and audit their Rewards Engine contracts that distribute their...