Say Hi to OpenZeppelin, the Company

Today we are announcing our new company name and brand structure: OpenZeppelin. This change from our previous name, Zeppelin Solutions, allows us to…

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Build your app with the Gas Station Network

The Gas Station Network, or GSN for short, is a decentralized solution for solving user onboarding to Ethereum…

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Bypassing Smart Contract Timelocks

In this article, we look at a game theoretical attack against smart contract timelock systems that allows the…

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GSN: The Ultimate Ethereum Onboarding Solution

Gas Station Network is an open-source service that allows developers to create unique decentralized applications that…

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Exploiting Uniswap: from reentrancy to actual profit

Uniswap is a public, open-source protocol to exchange tokens in Ethereum. In Uniswap, there is a separate exchange contract for each token. While it was designed to seamlessly work with ERC20…

Say Hi to OpenZeppelin, the Company

Today we are announcing our new company name and brand structure: OpenZeppelin. This change from our previous name, Zeppelin Solutions, allows us to look deeply at our brand and at how it can better…

Launching the Zeppelin community forum

The Zeppelin community connects experts, beginners, and enthusiasts of smart contract and decentralized app development from all over the world.

Getting the most out of CREATE2

In this post, we’ll go in depth into the CREATE2 opcode and its uses in counterfactual...

Announcing the Wyre + Zeppelin TPL integration

Wyre and Zeppelin share an ambition to lower barriers to entry for blockchain entrepreneurs, so we’ve spun up an integration of the Transaction Permission Layer (“TPL”) and YES Token which does just…

Sign it like you mean it: creating and verifying Ethereum signatures

Recently, Zeppelin announced that it had joined the Gas Station Network Alliance, a new group focused on the standardization of Meta-transactions for the Ethereum network.

Solidity Hot Reloading Using ZepKit

​​​​ZepKit provides a great start for DApp development on Ethereum. Today, we are happy to announce the release of Solidity Hot Reloading to help make your process even more comfortable and more…

Technical Description of Critical Vulnerability in MakerDAO Governance

While working on an audit for the Coinbase team, we found a critical vulnerability in the DSChief contract of the DappHub library.

MakerDAO Critical Vulnerability Notice

While working on an audit for the Coinbase team, we found a critical vulnerability in one of the DappHub library contracts. This affects the MakerDAO system currently in production.

Solo Margin Protocol Audit

The dYdX team asked us to review and audit their Solo project. We looked at the code and our results are published below.