Holdefi is a lending platform where users can hold their assets and earn interest or borrow tokens and repay them after a specific period of time. Anyone can supply assets to Holdefi's liquidity pool and immediately begin earning interest.

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 operations suite for Ethereum already being used by leading DeFi and NFT teams such as Opyn, Synthetix, TheGraph, PoolTogether, Yearn.Finance, Foundation Labs, and dYdX.

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

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.

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 directly from your Buidler scripts or Truffle migrations.

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 propose an upgrade.

A flash-mintable asset-backed token is an ERC20-compliant token that is: Asset-backed and Flash-mintable.

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 36 hours, which then would have opened an alternative Denial of Service (DoS) attack vector with potential to indefinitely freeze their funds.

In the wake of the current pandemic and other recent events affecting DeFi, we at OpenZeppelin have taken the chance to review the current state of security and risk management in the blockchain space.

We are excited to announce that Jonathan Alexander is joining OpenZeppelin as CTO. OpenZeppelin is a technology company whose mission is to protect the core infrastructure of an open, global economy. Jonathan will play a critical role in making the cryptoeconomy safer by scaling and expanding OpenZeppelin’s suite of products and services.