https://openzeppelin.com

OpenZeppelinThe standard for secure blockchain applications | Smart Contracts AuditOpenZeppelin Products Open Source Tools Contracts Library Secure smart contract templates Contracts Wizard Interactive smart contract generator Upgrades Plugin Safe and easy smart contract upgrades Defender Cloud Services Relayers Send reliable transactions via API Monitor Gain visibility into your smart contracts Actions Automate smart contract operations Access Control Manage contract roles and permissions Code Inspector Find and resolve smart contract vulnerabilities Deploy Launch and upgrade smart contracts safely Transaction Proposals Interactive transaction builder Defender Pricing -> Services Services Smart Contract Security Audit Industry standard for securing smart contracts Emergency Response React with expertise and speed ZKP Practice Scalability, Privacy, and Security Solutions Ecosystem Stack Developer acquisition, accelerated Resources Resources Documentation Blog Forum Ethernaut CTF Company About us Careers Security Center Login Talk to an Expert Sign Up Talk to an Expert Sign Up Products Open Source Tools Contracts Library Contracts Wizard Upgrades Plugins Defender Cloud Services Relayers Monitor Actions Access Control Code Inspector Deploy Transaction Proposals Defender Pricing Services Smart Contract Security Audit Emergency Response ZKP Practice Solutions Ecosystem Stack Resources Documentation Blog Forum Ethernaut CTF Company About us Careers Security Center The standard for secure onchain applications at any scale Build and operate with OpenZeppelin's open-source tools and Defender Cloud Services across 30+ networks. Secure your code with our smart contracts audit. Talk to an Expert Trusted by the world’s leading projects Total value transferredvia OpenZeppelin Contracts Explore Dune Dashboard $6,398,582,627,181T Explore Dune Dashboard Build Secure Operate Explore Contracts Talk to an Expert Get Started OpenZeppelin Stack Build “OpenZeppelin's contract library continues to be one of the best things to have happened for security in this space.” Daniel Von Fange Security Lead, Origin Explore Contracts Contract Libraries Speed up development process and minimize risk. The battle-tested industry standard for Solidity and other languages. Use Cases Tokens Asset Tokenization DeFi Governance Stablecoins Gaming NFTs Bridges Create your smart contract now Solidity Cairo Choose Template ERC20 ERC20 ERC721 ERC1155 Governor Custom Name Symbol Premint Customize and Deploy -> pragma solidity ^0.8.20; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; contract MyToken is ERC20 { constructor() ERC20("MyToken", "MTK") { _mint(msg.sender, 5 * 10 ** decimals()); } } pragma solidity ^0.8.20; import "@openzeppelin/contracts/governance/Governor.sol"; import "@openzeppelin/contracts/governance/extensions/GovernorCountingSimple.sol"; import "@openzeppelin/contracts/governance/extensions/GovernorVotes.sol"; import "@openzeppelin/contracts/governance/extensions/GovernorVotesQuorumFraction.sol"; contract MyGovernor is Governor, GovernorCountingSimple, GovernorVotes, GovernorVotesQuorumFraction { constructor(IVotes _token) Governor("MyGovernor") GovernorVotes(_token) GovernorVotesQuorumFraction(4) {} function votingDelay() public pure override returns (uint256) { return 7200; // 1 day } function votingPeriod() public pure override returns (uint256) { return 50400; // 1 week } // The following functions are overrides required by Solidity. function quorum(uint256 blockNumber) public view override(Governor, GovernorVotesQuorumFraction) returns (uint256) { return super.quorum(blockNumber); } } pragma solidity ^0.8.20; contract MyContract { } #[starknet::contract] mod MyToken { use openzeppelin::introspection::src5::SRC5Component; use openzeppelin::token::erc20::ERC20Component; use openzeppelin::token::erc20::ERC20HooksEmptyImpl; component!(path: ERC20Component, storage: erc20, event: ERC20Event); component!(path: SRC5Component, storage: src5, event: SRC5Event); #[abi(embed_v0)] impl ERC20MixinImpl = ERC20Component::ERC20MixinImpl; impl ERC20InternalImpl = ERC20Component::InternalImpl; #[storage] struct Storage { #[substorage(v0)] erc20: ERC20Component::Storage, #[substorage(v0)] src5: SRC5Component::Storage, } #[event] #[derive(Drop, starknet::Event)] enum Event { #[flat] ERC20Event: ERC20Component::Event, #[flat] SRC5Event: SRC5Component::Event, } #[constructor] fn constructor(ref self: ContractState) { self.erc20.initializer("MyToken", "MTK", ""); self.erc20.mint(recipient, 0000000000000000000); } } #[starknet::contract] mod MyContract { #[storage] struct Storage { } } Customize and Deploy -> “OpenZeppelin's contract library continues to be one of the best things to have happened for security in this space.” Daniel Von Fange Security Lead, Origin Secure “Collaborating with OpenZeppelin on our security audit was a positive experience. We appreciated their thoroughness and attention to detail.” Yoav Weiss Security, Ethereum Foundation Talk to an Expert Gold Standard Audits Our Security Researchers set the industry standard in code review. Securing cutting-edge implementations in multiple types of audits including Smart Contract, ZKP, and Infrastructure. 1K+ Critical and High vulnerabilities uncovered $50B in Total Value Locked (TVL) secured +1M Lines of code reviewed We protect decentralized systems in different languages. “Collaborating with OpenZeppelin on our security audit was a positive experience. We appreciated their thoroughness and attention to detail.” Yoav Weiss Security, Ethereum Foundation Operate “Defender is the perfect companion for operating with a protocol transparently and securely.” Ariel Barmat Lead Engineer, Edge & Node Get Started Defender Cloud Services Operate, Monitor, and Automate applications from testnet to mainnet, at any scale. Reliable and efficient relayers for high volume transactions across 30+ networks. +50M Transactions processed via Defender relayers +29M Monitors alerts triggered +3K Deployed contracts +30 mainnet and testnet networks supported. “Defender is the perfect companion for operating with a protocol transparently and securely.” Ariel Barmat Lead Engineer, Edge & Node Community Public Goods Your success is our passion Our mission is to create and protect the Open Economy. Our industry-standard development and tooling resources are public, good – and free. Ethernaut CTF The #1 educational resource for smart contract security. 140k+ plays across 5 networks and 10 languages. Authoring and co-authoring numerous EIPs and ERCs Notable contributions include Account Abstraction (ERC-1271), Upgradeability (ERC-7201, ERC-1967), and Metatransactions (ERC-2771). Contracts Library and Plugins The standard for secure smart contract development in Solidity and Cairo. Recognized for its value to the Ethereum ecosystem by leading rankings in RetroPGF 2 and 3. Upgrade plugins for Foundry and Hardhat. Security Standards and Community Initiatives Contributing to the widespread adoption of vulnerability detection and threat response best practices. Members of EthTrust and SEAL911 organizations. 5 zero-day vulnerabilities uncovered $15+ billion funds at risk saved, helping affected protocols prevent losses. Supporting top protocols to Build, Secure & Operate onchain Build Secure Operate Securing all releases and reducing response time Build TransparentProxy ProxyAdmin Ownable2Step Math ERC20Permit Secure Smart Contract Security Audits ZKP Security Audits Security Advisory Operate Defender Monitors Ensuring seamless upgrades and accelerating its developer ecosystem Build ERC20 Ownable Proxy Address StorageSlot Pausable TransparentProxy Initializable Contracts library implementation for Stylus Secure Smart Contract Security Audits DAO Security Proposal reviews Operate Defender Deploy, Relayers, Monitors & Actions support for Arbitrum One, Arbitrum Nova & Arbitrum Sepolia Securing all DAO governance proposals and incidents Build Math ECDSA ERC20 ERC4626 SafeERC20 Secure Smart Contract Security Audits Security Advisory Security Council Incident Response DAO Security Proposal Reviews Operate Defender Monitors, Relayers, Actions Accelerating their ecosystem with the OpenZeppelin Stack Build Parachain runtimes library Secure Smart Contract Security Audits Security Advisory Operate Defender Monitors Accelerating their ecosystem with the OpenZeppelin Stack Build Contracts library implementation for Cairo Secure Smart Contract Security Audits Building and expanding its virtual world securely Build Initializable Ownable SafeERC20 Address AccessControlEnumerable ECDSA BeaconProxy Secure Smart Contract Security Audits Security Advisory Operate Defender Monitors, Actions, Transaction Proposals, Code Inspector View more What's next? Operate, Monitor, and Automate on-chain applications at any scale Start with Defender for free -> Talk with our experts about building, securing, or operating your project Contact us -> © Zeppelin Group Ltd Service Level Agreement Terms of Service Privacy Policy Products Contracts Library Contracts Wizard Upgrade Plugins Defender Cloud Services Services Smart Contract Security Audit Emergency Response ZKP Practice Ecosystem Stack Resources Documentation Blog Forum Ethernaut CTF Company About us Careers Brand Kit Trust

en

en

1730057581

https://openzeppelin.com

Guhindura urubuga rwawe?

Uriko ukora iki?