Introducing OpenZeppelin Contracts v5.1

Participate in Zeppelin’s Puzzle Game to Celebrate Devcon4!

After the fun we had with last year’s Ethernaut hacking game, we’re releasing EthHunt, a new game...

Events

OpenBazaar’s Escrow Audit

The OpenBazaar team asked us to review and audit their Escrow contract, one of several in their...

Security Audits

Getting started with OpenZeppelin-eth

These are great times for smart contract development. The pieces for Ethereum 2.0 are coming...

Products

Announcing OpenZeppelin 2.0

A stable, audited, and fully tested package for smart contract development

Announcements Products

Open source collaboration in the blockchain era: EVM packages

Smart contract development is still in its early days. We’re all still trying to figure out what it...

Products

The Global Coordination Machine

Few applications need blockchains. Distributed consensus makes each computational step very...

Security Insights

Deconstructing a Solidity Contract  - Part VI: The Metadata Hash

In the last article, we noticed that the runtime bytecode generated by the Solidity compiler...

Security Insights

Deconstructing a Solidity Contract - Part V

The function body is precisely what the function wrappers detour to, after unpacking the incoming...

Products

Deconstructing a Solidity Contract  - Part IV: Function Wrappers

We saw how the function selector acts as a hub or a switch of sorts in our BasicToken.sol contract....

Security Insights

Transaction Permission Layer Protocol v1.0

The Transaction Permission Layer protocol (TPL) is a method for assigning metadata (herein referred...

Products

Compliant Decentralization?: Exploring an Approach to Utility Token Distribution

William Hinman’s recent statements at the Yahoo Finance All Markets Summit provide some guidance...

Security Insights

Deconstructing a Solidity Contract - Part III: The Function Selector

In the prev. article, we identified the need to separate a contract’s bytecode into creation-time...

Security Insights