OpenZeppelin ORG

OpenZeppelin Contracts is a library for secure smart contract development.

Upgradeable variant of OpenZeppelin Contracts, meant for use in upgradeable contracts.

Plugins for Hardhat and Foundry to deploy and manage upgradeable contracts on Ethereum.

Web3/Solidity based wargame

OpenZeppelin Contracts written in Cairo for Starknet, a decentralized ZK Rollup

A library for secure smart contract development written in Rust

Blockchain educational resources curated by the OpenZeppelin team

No description.

A JavaScript library to generate merkle trees and merkle proofs.

Documentation generator for Solidity projects

OpenZeppelin SDK repository for CLI and upgrades.js. No longer actively developed.

Code and slides for OpenZeppelin Workshops

Assertion library for Ethereum smart contract testing

A space for the community to interact and exchange ideas on the OpenZeppelin platform. Do not use in production!

CLI tool to develop StarkNet projects written in Cairo

Interactive smart contract generator based on OpenZeppelin Contracts.

Foundry library for deploying and managing upgradeable contracts

Agent skills for secure smart contract development with OpenZeppelin Contracts libraries

Exploiting a Uniswap exchange that uses an ERC777 token by leveraging the reentrant microtrading attack vector

Solidity library of encrypted contracts using Zama's FHEVM

OpenZeppelin Relayer

Subgraph schema and templates to index the activity of OpenZeppelin Contracts.

A blockchain monitoring service that watches for specific on-chain activities and triggers notifications based on configurable conditions.

Experiments with Solidity JWT. Do not use in production.

Solidity library for secure and modular Uniswap hooks.

An OpenZeppelin starter kit containing React, OpenZeppelin SDK & OpenZeppelin Contracts.

⚡️ Ethernaut CTF 2024 Challenges & Solutions

TypeScript types and a JSON Schema for the Solidity AST

Runtime Templates for Polkadot Parachains

OpenZeppelin Contracts written in Rust for Stellar Soroban

UI for TokenVesting contract from OpenZeppelin. No longer maintained

Solidity library of smart contracts from the OpenZeppelin Community

[Not actively maintained] One-line setup for blazing-fast smart contracts tests

Automatically expose internal Solidity functions for smart contract testing.

No description.

Empty sample starter truffle project for using zeppelin-solidity for a crowdsale

Monorepo for all defender-client npm packages

CLI tool to develop Starknet projects written in Cairo

OpenZeppelin Contracts written in Compact for Midnight

This UI calculates the Safe transaction hashes computing both the domain and messages hashes

Example snippets for Defender Autotasks

Source for the old OpenZeppelin documentation site

OpenZeppelin's secure and reusable contracts for the Sui Move ecosystem.

A minimal based rollup implementation that is easy to understand and extend

A collectibles crafting game. Built using the OpenZeppelin SDK.

An easy to use and reliable library that provides one line access to Web3 API.

UI Builder is an open-source blockchain development tool that helps developers and non-developers create user-friendly interfaces for smart contract interaction by providing a chain-agnostic form builder that generates standalone "mini apps" without requiring backend infrastructure.

An OpenZeppelin starter kit tutorial containing React, OpenZeppelin SDK & OpenZeppelin Contracts.

An OpenZeppelin starter kit focused on GSN.

Web3 provider for the Gas Station Network

Security Management to Protect the Open Economy

Model Context Protocol Servers Repository for OpenZeppelin products

Defender SDK

Templates for using OpenZeppelin Defender using Serverless configurations

No description.

No description.

Allows multiple parties to agree on transactions before execution. Forked from Gnosis multisig repository.

Source code for OpenZeppelin website

Configure a Defender environment via code

Code style guidelines and rules for OpenZeppelin projects

A lightweight highly performant event scanner built in rust

No description.

No description.

Test and development helper methods and scripts for GSN

OpenZeppelin starter-kit based GSN tutorial for a Chat App

OpenZeppelin documentation site configuration

Deploy Stylus contracts with Solidity constructors

Easy to use test helpers for Arbitrum Stylus written in Rust

Example meta-tx relay built using Defender

ERC20 token on-boarding on the OpenZeppelin SDK platform

No description.

Test environments for crosschain operations

Work in progress explorer for AccessControl roles

Load contract ABIs from built artifacts and return contract objects

Chai assertions for comparing arbitrary-precision integers using the bn.js library

LaTeX sources for the OpenZeppelin Platform Whitepaper

No description.

OpenZeppelin Relayer SDK

No description.

Solidity ANTLR4 grammar Python parser

NFT for OpenZeppelin Team

A collection of starter dapps on Midnight Network

The Ethereum Gas Station Network Alliance Landing Page and Tools

Foundry simulation for Compound Proposal for re-enabling MakerDAO DSR

Solidity Hot Loader for Starter Kits. Not currently maintained

No description.

Plugin for Nile to deploy and manage upgradeable contracts on StarkNet.

👷 Under construction!

No description.

Manage OpenZeppelin Access Control contracts across multiple blockchains — visualize roles, permissions, and execute admin actions.

GSN relayer server, forked from openeth-dev/gsn

Set of tests to reflect the proposal lifecycle behavior

No description.

No description.

Backup, synchronization, and coordination layer for private accounts.

Stellar Soroban security detectors SDK

OpenZeppelin Documentation

Timeout-aware, auto-retrying, failover-ready RPC provider wrapper for Alloy built in Rust

Vouching contracts and scripts for the OpenZeppelin SDK token

The essential blueprint for crafting secure protocols

The Ethereum Improvement Proposal repository

Template repo to define assets listing on Compound

OpenZeppelin UI - React components and utilities for blockchain applications

OpenZeppelin Research group working repository

Scripts used for docs previews in pull requests across OpenZeppelin projects

🧱 Infrastructure for Ethernaut CTF 2024

A monorepo for collecting all the shared Compact tools

Static analysis scanner for DAML contracts

Stablecoin DAML with single admin CDP + fixed-discount liquidation

Institutional website

No description.

OpenZeppelin Ethereum Packages registry

A checklist for auditing programming languages designed for blockchain environments

Security roles and responsibilities for Compound

Post Quantum verifiers candidates for a custom Account implementation on Starknet

Property-based testing for DAML contracts

No description.

No description.

Browser-based Move security wargame: solve CTF levels by writing exploits and returning Flag proofs.

DAML template for CIP-056, Canton Token Standard

OpenZeppelin Relayer - x402 Facilitator plugin

No description.

polkadot confidential payments

No description.

Set of tools to manage the GSN

CLI that help developers to upgrade stellar contracts

A template for writing Uniswap v4 Hooks with custom swap curve implemantion in Stylus.

Forta detection bot to alert about changes in quorum quantity in a Governor contract

No description.

No description.

No description.

Access Control subgraph toolkit for Defender

No description.

No description.

The Ethereum VM implemented in Javascript

Core code for Ganache

a tool for processing JSON RPC

Single API for resolving Solidity artefacts and imports

A template for writing Uniswap Custom Swap Curves in Stylus.

Minimal rollup based protocol 🥁

Ethereum compatibility layer for Substrate.

No description.

Fork of sandbox-smart-contracts

A place to keep study materials associated with the tech coaching

Wizard-based configuration interface for real-world asset token projects across multiple blockchain ecosystems.

OpenZeppelin Ecosystem Adapters are a set of modular, chain-specific integration packages that bridge the gap between blockchain ecosystems and developer tooling.

Closed-loop stablecoin payments and loyalty dApp template on Sui (Permissioned Asset Standard). Reference implementation: Joe's Coffee.

Formal verification for DAML contracts

Defender Remix plugin resources

No description.

No description.

A set of GitHub workflow automations for generating API references in remote repos

A collection of Rust libraries designed to simplify development and testing with Soroban, the smart contract platform for the Stellar network.

An Ethereum-compatible smart contract parachain on Polkadot

Compiled bytecode related to our FutureSwap audits for public viewing

No description.

Parity's ink! to write smart contracts

Description of the CTO job opening at OpenZeppelin

Compact security detectors SDK

Safe allows secure management of blockchain assets.

Relayer plugin for launchtube

Common Ethereum structs for Rust.

Pure Rust implementation of Ethereum Virtual Machine

Collection of open substrate pallets

tools, primitives and pallets for container-chains

No description.

No description.

Experimental VS Code extension to assist with patterns related to OpenZeppelin Contracts

Substrate Open Runtime Module Library

No description.

An efficient money market protocol for Ethereum and compatible chains (aka Compound III, Compound v3).

Repo for CLA document

Publications from OpenZeppelin

https://openzeppelin-slack.netlify.com/ Source for https://slack.openzeppelin.org/

Redirection rules for various old websites

No description.

No description.

OpenZeppelin relayer channels IaC

An L2 execution engine implementation for the Taiko protocol. 🚚

Taiko Alethia based rollup protocol 🥁

Open-source solver implementation, tooling, and libraries to easy start filling cross-chain intents.

Canton Development Fund proposals, reviews, and administration

No description.

Cross-chain storage proof generation API for the [OIF Solver](https://github.com/openzeppelin)'s Broadcaster settlement.

A keystore library that provides a unified interface for managing private keys

Adaptation of OIF implementation of ERC-7683 with XCM incorporated

Github Action for installing Compact compiler

Generic Polkadot Parachain Template

Polkadot Parachain template with Frontier EVM configured to maximize Ethereum compatibility

oz-camp-2025-rust-zk-workshop

No description.

HydraDX node - cross-chain liquidity protocol built on Substrate

No description.

Repository to store assets to share within the OpenZeppelin's Immunefi Program

This repository shows how to setup quickly a monitoring for all of hardhat deployed contracts and critical functions in less then 30 minutes