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Showing 261 open source projects for "contract++"
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Solidity
The Smart Contract Programming Language
Solidity is a statically-typed curly-braces programming language designed for developing smart contracts that run on Ethereum. Solidity 0.8.4 adds custom structured errors, allows more flexible configuration of the SMTChecker and fixes a bug in the Solidity ABI decoder v2. Read more about the bug here. With v0.8.4, errors can be defined inside and outside of contracts (including interfaces and libraries). This provides a convenient and gas-efficient way to explain to users why an operation... -
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Hardhat
Hardhat is a development environment to compile, deploy, test
Hardhat is an Ethereum development environment for professionals. It facilitates performing frequent tasks, such as running tests, automatically checking code for mistakes or interacting with a smart contract. Check out the plugin list to use it with your existing tools. Hardhat Runner is the main component you interact with when using Hardhat. It's a flexible and extensible task runner that helps you manage and automate the recurring tasks inherent to developing smart contracts and dApps... -
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OpenZeppelin Contracts
OpenZeppelin Contracts is a library for secure smart contracts
A library for secure smart contract development. Build on a solid foundation of community-vetted code. OpenZeppelin Contracts uses semantic versioning to communicate backward compatibility of its API and storage layout. To keep your system secure, you should always use the installed code as-is, and neither copy-paste it from online sources nor modify it yourself. The library is designed so that only the contracts and functions you use are deployed, so you don't need to worry about it needlessly... -
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tilemaker
Make OpenStreetMap vector tiles without the stack
Create the vector tiles on your home machine or using a cloud CPU. Upload the file to your site or app. And that's it. No database to maintain; no contract to pay; and no restriction on commercial use. tilemaker is a single executable that takes OpenStreetMap data and makes it into vector tiles. It's supremely customizable, but if you just want off-the-shelf tiles in a standard style, tilemaker comes bundled with the files to do that too. With tilemaker, you can pull out any facet... -
The All-in-One Commerce Platform for Businesses - ShopifyShopify is a leading all-in-one commerce platform that enables businesses to start, build, and grow their online and physical stores. It offers tools to create customized websites, manage inventory, process payments, and sell across multiple channels including online, in-person, wholesale, and global markets. The platform includes integrated marketing tools, analytics, and customer engagement features to help merchants reach and retain customers. Shopify supports thousands of third-party apps and offers developer-friendly APIs for custom solutions. With world-class checkout technology, Shopify powers over 150 million high-intent shoppers worldwide. Its reliable, scalable infrastructure ensures fast performance and seamless operations at any business size.
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BlockScout
Blockchain explorer for Ethereum based network
Blockscout provides a comprehensive, easy-to-use interface for users to view, confirm, and inspect transactions on EVM (Ethereum Virtual Machine) blockchains. Blockscout currently supports a wide range of projects and hosts chains such as Ethereum, Ethereum Classic, Gnosis Chain, RSK, LUKSO, Astar, and many more. BlockScout is an Elixir application that allows users to search transactions, view accounts and balances, and verify smart contracts on the Ethereum network including all forks and... -
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Chainlink
node of the decentralized oracle network
Securely connect smart contracts with off-chain data and services. Chainlink decentralized oracle networks provide tamper-proof inputs, outputs, and computations to support advanced smart contracts on any blockchain. Start building your hybrid smart contract with Chainlink. Use decentralization, trusted nodes, premium data, and cryptographic proofs to connect highly accurate and available data/APIs to any smart contract. Build on a flexible framework that can retrieve data from any API, connect... -
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CCXT
JavaScript/TypeScript/Python/C#/PHP cryptocurrency trading API
The ccxt library is a collection of available crypto exchanges or exchange classes. Each class implements the public and private API for a particular crypto exchange. All exchanges are derived from the base Exchange class and share a set of common methods. To access a particular exchange from ccxt library you need to create an instance of corresponding exchange class. Supported exchanges are updated frequently and new exchanges are added regularly. -
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Mythril
Security analysis tool for EVM bytecode. Supports smart contracts
Mythril is a security analysis tool for EVM bytecode. It detects security vulnerabilities in smart contracts built for Ethereum, Hedera, Quorum, Vechain, Roostock, Tron and other EVM-compatible blockchains. It uses symbolic execution, SMT solving and taint analysis to detect a variety of security vulnerabilities. It's also used (in combination with other tools and techniques) in the MythX security analysis platform. If you are a smart contract developer, we recommend using MythX tools which... -
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Cardano Node
The core component that is used to participate in a Cardano
Cardano Node is the core software that powers the Cardano blockchain, a decentralized, proof-of-stake platform for smart contracts and digital assets. Developed in Haskell, the node allows participation in Cardano’s network by validating transactions, producing blocks, and maintaining the ledger. It supports Shelley, Goguen, Basho, and other phases of Cardano’s roadmap, and plays a crucial role in network security and consensus. The node is configurable for different use cases, including... -
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Pejota
The ERP and CRM, multi language, for freelancers
PeJota is a Freelancer/solo entrepreneur‑focused ERP/CRM built on PHP/Laravel with FilamentPHP UI. It includes client/project/contracts/tasks/timesheets and invoice management in a lightweight monolithic app, ideal for multilingual SMB use. -
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Plutus
The Plutus language implementation and tools
Plutus is the smart contract development framework for the Cardano blockchain, created using Haskell. It provides the core infrastructure for writing, testing, and deploying secure, deterministic smart contracts on the Cardano platform. Plutus includes a custom functional language (Plutus Core), a higher-level embedded DSL (Plutus Tx) for writing contracts in Haskell, and an off-chain infrastructure for managing interactions. It ensures strong correctness guarantees through formal verification... -
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Aiken
A modern smart contract platform for Cardano
A modern smart contract platform for Cardano. -
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Stacks
The Stacks 2.0 blockchain implementation
Stacks 2.0 is a layer-1 blockchain that connects to Bitcoin for security and enables decentralized apps and predictable smart contracts. Stacks 2.0 implements Proof of Transfer (PoX) mining that anchors to Bitcoin security. Leader election happens at the Bitcoin blockchain and Stacks (STX) miners write new blocks on the separate Stacks blockchain. With PoX there is no need to modify Bitcoin to enable smart contracts and apps around it. Normal releases in this repository that add features... -
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vyper
Pythonic Smart Contract Language for the EVM
See Installing Vyper to install vyper. See Tools and Resources for an additional list of framework and tools with vyper support. See Documentation for the documentation and overall design goals of the Vyper language. See Learn.Vyperlang.org for learning Vyper by building a Pokémon game. See try.vyperlang.org to use Vyper in a hosted jupyter environment! There is also an online compiler available you can use to experiment with the language and compile to bytecode and/or IR. While the vyper... -
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Krypt
Build a Web 3.0 React Solidity blockchain application
This repository accompanies a step-by-step tutorial for building a Web3 decentralized application that connects a React front end to Ethereum smart contracts written in Solidity. It walks you through setting up MetaMask, configuring a local or test blockchain, and wiring contract methods to a clean, modern UI. The project emphasizes end-to-end learning: from authoring and compiling a smart contract, to deploying it, and then interacting with it via web3 libraries in React. It demonstrates core... -
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Remix Project
Compiler and IDE that enables users to build Ethereum contracts
Remix Project is a rich toolset including Remix IDE, a comprehensive smart contract development tool. The Remix Project also includes Remix Plugin Engine and Remix Libraries which are low-level tools for wider use. Remix IDE is used for the entire journey of contract development by users of any knowledge level. It fosters a fast development cycle and has a rich set of plugins with intuitive GUIs. The IDE comes in 2 flavors and a VSCode extension. Supported browsers: Firefox v100.0.1 & Chrome... -
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Node.js Testing Best Practices
Beyond the basics of Node.js testing
This repository narrows the testing lens to Node.js backends, focusing on the challenges of servers, microservices, and cloud-native deployments. It covers API testing, contract testing, and persistence-layer strategies that avoid coupling tests to fragile implementation details. The material explains how to structure tests around process boundaries—HTTP, queues, cron jobs—while keeping fast feedback cycles through selective integration tests and reliable test doubles. It dives into topics like... -
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OpenDAN
OpenDAN is an open source Personal AI OS
OpenDAN is an open-source Personal AI OS , that consolidates various AI modules in one place for your personal use. The goal of OpenDAN (Open and Do Anything Now with AI) is to create a Personal AI OS , which provides a runtime environment for various Al modules as well as protocols for interoperability between them. With OpenDAN, users can securely collaborate with various AI modules using their private data to create powerful personal AI agents, such as butlers, lawyers, doctors, teachers,... -
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ZoKrates
A toolbox for zkSNARKs on Ethereum
.... zkSNARKs are the most widely used zero-knowledge protocols, with the anonymous cryptocurrency Zcash and the smart-contract platform Ethereum among the notable early adopters. Ethereum runs computations on all nodes of the network, resulting in high costs, limits in complexity, and low privacy. zkSNARKs have been enabling to only verify computations on-chain for a fraction of the cost of running them, but are hard to grasp and work with. -
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Aeternity node
Scalable blockchain for the people, smart contracts, state channels
... excellence. æternity blockchain itself launched as the public æternity mainnet in 2018. It is now a blossoming community of enthusiasts supported via the æternity crypto foundation. At its core, æternity is a blockchain protocol and a smart contract platform that goes beyond what traditional blockchains do. It is designed to be fault-tolerant and perfect for cases with billions of transactions in DEFI and more. -
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MultiversX Chain
The official implementation of the MultiversX blockchain protocol
mx-chain-go is the core implementation of the MultiversX (formerly Elrond) blockchain protocol, developed in Go to provide a highly scalable, secure, and decentralized infrastructure for Web3 applications. It implements Adaptive State Sharding and Secure Proof-of-Stake (SPoS) to achieve fast transaction speeds and efficient consensus. This implementation powers the MultiversX mainnet and supports advanced features like smart contracts, meta-transactions, and economic models suited for DeFi... -
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Echidna
Ethereum smart contract fuzzer
Echidna is a weird creature that eats bugs and is highly electrosensitive (with apologies to Jacob Stanley) More seriously, Echidna is a Haskell program designed for fuzzing/property-based testing of Ethereum smarts contracts. It uses sophisticated grammar-based fuzzing campaigns based on a contract ABI to falsify user-defined predicates or Solidity assertions. We designed Echidna with modularity in mind, so it can be easily extended to include new mutations or test specific contracts... -
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uAgents
A fast and lightweight framework for creating decentralized agents
uAgents is a library developed by Fetch.ai that allows for creating autonomous AI agents in Python. With simple and expressive decorators, you can have an agent that performs various tasks on a schedule or takes action on various events. -
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Cy
Hackers terminal browser of Cyber blockchains
Cy - a nushell wrapper, a client for the Cyber family blockchains (bostrom, pussy) and IPFS. Bostrom is the name of the consensus computer that maintains a general-purpose, permissionless informational graph where nodes are CIDs of files in the IPFS network, and edges are Cyberlinks (consisting of source, destination, author, height - records) written into the blockchain. The information written into the blockchain is secured to remain in existence as long as the blockchain is operative. The... -
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Slither
Static Analyzer for Solidity
Slither is a Solidity static analysis framework written in Python 3. It runs a suite of vulnerability detectors, prints visual information about contract details, and provides an API to easily write custom analyses. Slither enables developers to find vulnerabilities, enhance their code comprehension, and quickly prototype custom analyses. Slither is the first open-source static analysis framework for Solidity. Slither is fast and precise; it can find real vulnerabilities in a few seconds...
