Introducing OpenZeppelin Contracts v5.1

Announcing OpenZeppelin Contracts 4.8

OpenZeppelin Contracts 4.8 is now final, wrapping up the open review period. This release includes...

Products

FEI Post Mortem

On Sunday May 2nd, 2021, the Fei Labs team identified an economic vulnerability that affected the...

Announcements

Workshop Recap: Managing Smart Contract Upgrades

Upgradeable contracts allow us to alter a smart contract to fix a bug, add additional features, or...

Products

Workshop Recap: Setting Up Access Control for Smart Contracts

Access control—that is, “who is allowed to do this thing”—is incredibly important in the world of...

Products

Holdefi Audit

Holdefi is a lending platform where users can hold their assets and earn interest or borrow tokens...

Security Audits Solidity

Admin Accounts and Multisigs

Best practice for securing admin accounts is to use a multisig (short for multi-signature wallet)....

Security Insights

Service Monitoring and Emergency Response with Defender

The DeFi space, and recently the NFT space, have continued to see a variety of exploits and even...

Products

Introducing Defender Sentinels

Today we are announcing the release of a new app, called Sentinels, to help prevent ongoing attacks...

Products

Workshop Recap: Cheap contract deployment through Clones

Clones (minimal proxies) as described in ERC1167, are very small, and cheap to deploy,...

Products

Workshop Recap: Gasless MetaTransactions with OpenZeppelin Defender

Gasless MetaTransactions with OpenZeppelin Defender. The workshop covers the following: Intro to...

Products

Introducing OpenZeppelin Defender

Ship faster with lower risk. Automate your Ethereum operations to deliver high-quality products...

Announcements Products

New Tools to Securely Manage Smart Contract Upgrades

We have partnered with Truffle, Nomic Labs (buidler) and Gnosis Safe to release two plugins and a...

Announcements