OpenZeppelin | Pricing (2024)

FAQs

What is OpenZeppelin used for? ›

OpenZeppelin is a popular open-source framework for writing secure and scalable smart contracts in the Solidity programming language. It provides a library of reusable and secure contract components that developers can use to build their own decentralized applications (dApps) on the Ethereum blockchain.

Free. Build your project with all the tools you need to get started.

The first secure operations platform for smart contracts

Administration mistakes on protocols and applications put user funds at risk. With Defender Admin, you can seamlessly manage all smart contract administration including access controls, upgrades, and pausing. Works with popular multi-sigs including Gnosis Safe.

Mission. OpenZeppelin's mission is to protect the open economy. We care deeply about economic liberty, equality of opportunities, and freedom to innovate.

Understanding EIP-2612

EIP-2612 introduces a feature called “permit” for ERC-20 tokens. This lets users approve token transactions without making a separate blockchain transaction each time. It uses off-chain signatures, meaning you can give permission away from the blockchain while still keeping it secure.

Hardhat is a popular development environment for building decentralized applications (dapps) on the Ethereum blockchain. It is employed to make it easier for developers to construct, test, and deploy smart contracts and to link their dapps with the larger Web3 ecosystem.

If you would like to contribute code or documentation you may do so by forking the repository and submitting a pull request. Any non-trivial code contribution must be first discussed with the maintainers in an issue (see Opening an issue). Only very minor changes are accepted without prior discussion.

ERC-721 is an open standard that describes how to build Non-Fungible tokens on EVM (Ethereum Virtual Machine) compatible blockchains; it is a standard interface for Non-Fungible tokens; it has a set of rules which make it easy to work with NFTs.

Ethernaut is a Web3/Solidity based wargame meant to be played in the EVM. The game was inspired by overthewire. Each level is a smart contract that the user must hack, and the game allows users to both learn about ethereum and see their skills compare to historical hacks.

Microsoft Defender Antivirus is a powerful tool that finds and removes malware from your PC.

Should I turn off defender Firewall? ›

Turning off Microsoft Defender Firewall could make your device (and network, if you have one) more vulnerable to unauthorized access. If there's an app you need to use that's being blocked, you can allow it through the firewall, instead of turning the firewall off.

Not only is Microsoft Defender Antivirus an excellent next-generation antivirus solution, but combined with other Defender for Endpoint capabilities, such as endpoint detection and response and automated investigation and remediation, you get better protection that's coordinated across products and services.

OpenZeppelin Contracts helps you minimize risk by using battle-tested libraries of smart contracts for Ethereum and other blockchains. It includes the most used implementations of ERC standards.

Co-founder, CEO at OpenZeppelin.

A library for secure smart contract development.

Build on a solid foundation of community-vetted code. Implementations of standards like ERC20 and ERC721. Flexible role-based permissioning scheme. Reusable Solidity components to build custom contracts and complex decentralized systems.

Personal access tokens are an alternative to using passwords for authentication to GitHub when using the GitHub API or the command line. Personal access tokens are intended to access GitHub resources on behalf of yourself.

Smart contracts deployed using OpenZeppelin Upgrades Plugins can be upgraded to modify their code, while preserving their address, state, and balance. This allows you to iteratively add new features to your project, or fix any bugs you may find in production.

ERC-721 tokens are the standards for non-fungible tokens (NFTs). These tokens cannot be exchanged for anything of equal value since they are unique in themselves, representing a unique asset. Each NFT token is linked to different owners and has its own tokenID or metadata that makes them unique.