Introducing OpenZeppelin Contracts v5.1

Optimism Smart Contracts Audit

The Optimism team is building the OVM, a fully-featured, EVM-compliant execution environment...

Security Audits L2's Solidity

Defender is Expanding Mainnet Access for All

By making Defender free, more projects can scale while protecting users from known and unknown...

Announcements

Introducing the Smart Contract Security Registry

We are proud to announce the open source Smart Contract Security Registry. Effective security not...

Announcements

Notional Contracts Audit

The Notional Finance team asked us to review and audit the governance smart contracts of their v2...

Security Audits

Origin Dollar Audit

The Origin Protocol team asked us to review and audit their Origin Dollar smart contracts. We...

Security Audits Stablecoin

Smart Contract Security Guidelines #4: Strategies for Safer Governance systems

This guide focuses on showcasing battle-tested practices and recommended patterns to implement...

Products

Ribbon Finance Audit

The Ribbon Finance team asked us to review and audit their Theta Vault and Delta Vault smart...

Security Audits

Smart Contract Security Guidelines #3: The Dangers of Price Oracles

This guide focuses on showcasing the architecture, roles and subtleties of most popular price...

Products

Protect Your Users With Smart Contract Timelocks

Learn how to use OpenZeppelin’s Defender to set up and deploy timelocks.

Products

Celo Contracts Audit Release 5

In another round of auditing, the cLabs team asked OpenZeppelin to review and audit recent changes...

Security Audits

Beta Finance Audit

The Beta Finance team asked us to review and audit some of their protocol smart contracts. We...

Security Audits

OpenZeppelin Contracts 4.3

This new release includes a modular system of contracts for on-chain governance, based on...

Products