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Getting the most out of CREATE2

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

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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…

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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…

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Our most popular audit reports

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Testing real-world contract upgrades

Deploying to production can be a stressful experience, especially if you don’t have a proper suite of tests to ensure that what you built will run smoothly.

Zeppelin at ETHDenver: an upgradeable, linkable future!

¡Hola Zeppeliners! It’s that time again, when hackers, innovators, and Bufficorns converge on ETHDenver for a week of #buidl, #buidl, #buidl!

EVM package deployment with ZeppelinOS—Part III

Now that you’ve created your first EVM package, let’s go through the steps you would take to link it to your project as if you were linking directly from NPM. These commands you already know, so I’ll…

EVM package deployment with ZeppelinOS—Part II

In this section, we’ll make sure the contract we’ve deployed to our local network works by testing directly against it in Truffle Console. Once we’re happy it works, we’ll publish to the mainnet and…

EVM package deployment with ZeppelinOS—Part I

If you’re familiar with Node.js, then you will be familiar with NPM (Node Package Manager). You will also know that the ability to npm install existing code in your project makes your life as a…

Why I’m Building Zeppelin

The purpose of this post is to update my personal vision of Zeppelin and Zeppelin’s projects, as their founder and CTO. This is my own personal perspective, and some Zeppelin team members may not be…

State of EVM Packages – End of 2018

 Two months ago, we presented the EVM package standard as a means to securely share on-chain upgradeable smart contract code. Since then, we have had a great response from the community...

RNDR Token Transfer Audit

The OTOY team asked us to review and audit their RNDR Token contracts. We looked at the code and now publish our results.

Toward a secure code ecosystem

This week started off with the finding of malicious code injected into a dependency of a popular open source npm package. The attacker found an inactive library, volunteered to help with the project,…

The transparent proxy pattern

Much has been discussed around proxy patterns and how to best achieve upgradeability in Ethereum smart contracts. The underlying idea is quite simple: instead of interacting with your smart contract…