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 ...

In this audit, we looked into Compound's alpha version of their governance system and its...

Security Audits Solidity Governance Compound

Compound's Open Oracle System is a protocol aiming to provide an on-chain price oracle based on...

Security Audits Solidity Lending Compound

The Opyn team asked us to review and audit the system. We looked at the code and now publish our...

Security Audits

The Compound team asked us to audit their integration of Multi-Collateral Dai and the Dai Savings...

Security Audits Solidity Lending

The PoolTogether team asked us to review and audit the system. We looked at the code and now...

Security Audits

The Aave team asked us to review and audit a pre-production version of their protocol. We looked at...

Security Audits Solidity Lending Aave

The Eco team asked us to review and audit the contracts for their open payment network. We looked...

Security Audits Solidity Payments

The Arro team asked us to audit their ERC20 ArroToken project. We look at the code and now we...

Security Audits

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