Doubling Down on Open Source Tools and Phasing Out Defender

OpenZeppelin is doubling down on open source development tools by sunsetting Defender and releasing production-ready open source Relayer and Monitor. Discover new features, and our expanded open ...

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

Products

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

Announcements

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

Products

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

Products

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

Security Audits Solidity

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

Security Insights

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

Products

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

Products

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

Products

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

Products

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

Announcements Products

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

Announcements