Introducing OpenZeppelin Contracts v5.1

Upgradeability using Unstructured Storage

During the last months we've been designing and developing a prototype of the zeppelin_os Kernel....

Products

On crowdsales and multiple inheritance

On 2017 we saw a mind-blowing number of crowdsales and ICOs running in the Ethereum blockchain....

Security Insights

US Dollar Audit

We reviewed and audited the US dollar contracts, from the US Federal Reserve team, for our own...

Security Audits

ERC20 Element Token Audit

The Element Group team asked us to review and audit their ERC20 Element Token contract. We looked...

Security Audits

TPL — A Framework for Secure Peer-to-Peer Exchange

Blockchain technology empowers the individual, holding the promise of an open financial system....

Products

Augur Core Audit

The Augur team asked us to review and audit their Augur Core project. We looked at the code and now...

Security Audits

Gnosis Multisig Wallet Audit

We reviewed and audited the Gnosis multisig wallet contract for our own internal use, and choose to...

Security Audits Solidity Vesting Wallet

EthDenver Zeppelin Prize Winners

As we’re wrapping up EthDenver 2018, the #gratitude hashtag falls short to say thanks to all the...

Events

POLY Token Contracts Audit

The Polymath team asked us to review and audit their POLY Token contracts. We looked at the code...

Security Audits

Bax Token Audit

The BABB team asked us to review and audit their Bax Token contract. We looked at the code and now...

Security Audits

Coinfix Token Audit

The Coinfix team asked us to review and audit their MerchantSubscription contract. We looked at the...

Security Audits

Smart Contract Upgradeability using Eternal Storage

As mentioned in our Development Roadmap Part Two, the Kernel is the foundational layer of...

Security Insights Products