Past Events

Smart Contract Security Guidelines #1: The Dangers of Token Integration

The more DeFi layers we integrate and compose, the more careful we need to be. As the stack grows, so does systemic…

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Indexing Smart Contracts with OpenZeppelin Subgraphs & The Graph

Creating dense Subgraphs is one of the most important aspects of indexing on-chain information. In this workshop we…

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How PoolTogether Automates Operations Using OpenZeppelin Defender

PoolTogether is a lossless lottery built with smart contracts using Defender to automate the award cycle process and…

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LATEST NEWS

OpenZeppelin Contracts 4.0

Due to the new built-in overflow checks in Solidity 0.8, which mark the end of the `SafeMath` era, this release of OpenZeppelin Contracts is a new major version of the library.

Introducing Defender Sentinels – Smart Contract Monitoring & Emergency Response

Today we are announcing the release of a new app, called Sentinels, to help prevent ongoing attacks and exploits in the DeFi space. The app is part of the OpenZeppelin Defender platform, a security…

OpenZeppelin Defender – March 2021 Update

We are excited to bring you many new Defender features this month that add powerful functionality to your security operations - all fully included in your Defender account. We built Defender to…

OpenZeppelin Contracts 3.4

OpenZeppelin Contracts 3.4 includes an ERC777 security fix for potential reentrancy issues in custom ERC777 extension, virtual view functions, ERC20 permit in drafts, Beacon proxy, and a Minimal…

Introducing OpenZeppelin Defender

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

The State of Smart Contract Upgrades

The State of Smart Contract Upgrades - 2020 edition A survey of the different Ethereum smart contract upgrade patterns and strategies from a technical viewpoint, plus a set of good practices and…

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 new app to securely deploy and manage upgradeable smart contracts.

OpenZeppelin Upgrades Plugins for Buidler and Truffle

We are releasing two new packages to deploy and manage upgradeable contracts from Buidler and Truffle! With them, you can easily and securely leverage the full flexibility of contract upgrades…

OpenZeppelin Upgrades App for Gnosis Safe

We are rolling out a Gnosis Safe App for managing proxy-based smart contract upgrades! This allows you to transfer ownership of a proxy or proxy-admin to a Gnosis Safe, and use the app to directly…

Argent Vulnerability – Technical Report

A high-severity vulnerability in the Argent wallet would have allowed attackers to take over wallets with no guardians. User action would have been needed to prevent the takeover attack in less than…

LATEST NEWS

OpenZeppelin Contracts 4.0

Due to the new built-in overflow checks in Solidity 0.8, which mark the end of the `SafeMath` era, this release of OpenZeppelin Contracts is a new major version of the library.

Introducing Defender Sentinels – Smart Contract Monitoring & Emergency Response

Today we are announcing the release of a new app, called Sentinels, to help prevent ongoing attacks and exploits in the DeFi space. The app is part of the OpenZeppelin Defender platform, a security…

OpenZeppelin Defender – March 2021 Update

We are excited to bring you many new Defender features this month that add powerful functionality to your security operations - all fully included in your Defender account. We built Defender to…

OpenZeppelin Contracts 3.4

OpenZeppelin Contracts 3.4 includes an ERC777 security fix for potential reentrancy issues in custom ERC777 extension, virtual view functions, ERC20 permit in drafts, Beacon proxy, and a Minimal…

Introducing OpenZeppelin Defender

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

The State of Smart Contract Upgrades

The State of Smart Contract Upgrades - 2020 edition A survey of the different Ethereum smart contract upgrade patterns and strategies from a technical viewpoint, plus a set of good practices and…

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 new app to securely deploy and manage upgradeable smart contracts.

OpenZeppelin Upgrades Plugins for Buidler and Truffle

We are releasing two new packages to deploy and manage upgradeable contracts from Buidler and Truffle! With them, you can easily and securely leverage the full flexibility of contract upgrades…

OpenZeppelin Upgrades App for Gnosis Safe

We are rolling out a Gnosis Safe App for managing proxy-based smart contract upgrades! This allows you to transfer ownership of a proxy or proxy-admin to a Gnosis Safe, and use the app to directly…

Argent Vulnerability – Technical Report

A high-severity vulnerability in the Argent wallet would have allowed attackers to take over wallets with no guardians. User action would have been needed to prevent the takeover attack in less than…

Our most recent security audit reports

Check out all of our audits >