Search Results for "smart contracts"
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Showing 85 open source projects for "smart contracts"
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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. -
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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 failed. ... -
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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. -
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Woke
Woke is a Python-based development and testing framework for Solidity
Woke is a Python-based development and testing framework for Solidity. A testing framework for Solidity smart contracts with Python-native equivalents of Solidity types and blazing-fast execution. A property-based fuzzer for Solidity smart contracts that allows testers to write their fuzz tests in Python. See examples and documentation for more information. Fuzzer builds on top of the testing framework and allows efficient fuzz testing of Solidity smart contracts. ... -
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Starknet Foundry
Blazing fast toolkit for developing Starknet contracts
Starknet Foundry is a fast development toolkit for building and testing Starknet smart contracts. It is written in Rust and built around native Cairo testing and Starknet-specific execution infrastructure. The project includes snforge for contract testing and sncast for interacting with deployed Starknet contracts from the command line. It is useful for developers who need testing, deployment, transaction handling, chain data access, and contract interaction tools in one workflow. ... -
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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. -
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Aeternity node
Scalable blockchain for the people, smart contracts, state channels
Engineered to scale and last, æternity is an easily accessible blockchain platform for the global public. With numerous innovative functionalities and performance far ahead of earlier blockchains, æternity allows its users and community to seamlessly venture into the new era of society, economy, and digital interactions. The æternity blockchain project was born out of a desire for a more fair Internet supported by scalable, open-source and cryptographic software, with a commitment to... -
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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. Easily deploy your contracts, run tests and debug Solidity code without dealing with live environments. ... -
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Fuels-rs
Fuel Network Rust SDK
fuels-rs is a Rust-native Software Development Kit (SDK) for the Fuel blockchain. It facilitates compilation, deployment, transaction crafting, contract interaction, and testing of Sway smart contracts, as well as launching and controlling local Fuel nodes for development or CI workflows. -
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FHEVM
Integrate FHE with blockchain applications
FHEVM is a framework built by Zama to enable confidential smart contracts on EVM-compatible blockchains using Fully Homomorphic Encryption (FHE). It lets developers write Solidity contracts that handle encrypted inputs, encrypted state, arithmetic and logical operations on encrypted types, while maintaining privacy (data always encrypted), composability (encrypted state works alongside public state), and security (via threshold decryption, KMS, etc). -
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MultiversX Chain
The official implementation of the MultiversX blockchain protocol
...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 and enterprise use. Developers can build dApps using WASM-based smart contracts with performance and scalability in mind. -
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Union
Serverless backend platform for Web3-native app development
...It provides a serverless execution layer with built-in authentication, event handling, and state management tailored for decentralized systems. Developers can write backend logic using WebAssembly and deploy logic that interacts with smart contracts and blockchain data without managing infrastructure. -
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Starknet MCP Server
MCP server that provides LLM with tools for interacting with Starknet
Starknet MCP Server is a comprehensive Model Context Protocol (MCP) server for the Starknet blockchain. It provides AI agents with the ability to interact with Starknet networks, query blockchain data, manage wallets, and interact with smart contracts. -
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Qtum
Qtum Core Wallet
...Any user can stake and help to secure the network. There is no voting, master nodes, or minimum amount required. There have been transactions as small as 2 Qtum that have created blocks in the past. Staking from smart contracts is under development. -
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Fuels‑TS
Fuel Network Typescript SDK
Fuels‑TS is a TypeScript SDK by FuelLabs for building decentralized applications on the Fuel blockchain. It provides tools for deploying and interacting with Sway smart contracts, managing wallets, crafting transactions, and initializing local development environments. Build forc workspace and generate Typescript types for everything. Built-in CLI for project bootstrap, build, deploy, dev server, and type generation. The primary license for this repo is Apache 2.0. Rich documentation including quickstart guides, cookbook, and API references. -
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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 in... -
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Hyperledger FireFly
Hyperledger FireFly is the first open source Supernode
...The FireFly API for digital assets, data flows, and blockchain transactions makes it radically faster to build production-ready apps on popular chains and protocols. Hyperledger FireFly has a pluggable microservices architecture. Everything is pluggable, from the Blockchain technology, token ERC standards, and custom smart contracts, all the way to the event distribution layer and private database. So if there aren't yet instructions for making FireFly a Supernode for your favorite blockchain technology - don't worry. There is almost certainly a straightforward path to plugging it in that will save you from re-building all the plumbing for your blockchain application from scratch. -
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Brownie
A Python-based development and testing framework for smart contracts
Brownie is a Python-based development and testing framework for smart contracts targeting the Ethereum Virtual Machine. Powerful debugging tools, including python-style tracebacks and custom error strings. The recommended way to install Brownie is via pipx. pipx installs Brownie into a virtual environment and makes it available directly from the command-line. Once installed, you will never have to activate a virtual environment prior to using Brownie. -
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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 patterns like sending transactions, reading on-chain state, and providing user feedback for pending and confirmed operations. ... -
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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 such as improved RPC endpoints, improved boot-up time, new event observer fields or event types, etc., are released on a monthly schedule. ... -
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BlockScout
Blockchain explorer for Ethereum based network
...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 sidechains. Currently available full-featured block explorers (Etherscan, Etherchain, Blockchair) are closed systems which are not independently verifiable. As Ethereum sidechains continue to proliferate in both private and public settings, transparent, open-source tools are needed to analyze and validate transactions. -
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Nethereum
Ethereum .Net cross platform integration library
Nethereum is the .Net integration library for Ethereum, simplifying the access and smart contract interaction with Ethereum nodes both public or permission like Geth, Parity or Quorum. Nethereum is developed targeting netstandard 1.1, netstandard 2.0, netcore 2.1, netcore 3.1, net451 and also as a portable library, hence it is compatible with all the operating systems (Windows, Linux, MacOS, Android, and OSX) and has been tested on cloud, mobile, desktop, Xbox, hololens and windows IoT.... -
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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 running full nodes, relay nodes, or stake pool operators. -
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Hyperledger Fabric
Distributed ledger framework for developing solutions and applications
...It offers a unique approach to consensus that enables performance at scale while preserving privacy. High-performance, secure, permissioned blockchain network. Code written in Go, chaincode (smart contracts) in Go, Javascript, or Java, SDKs in Node.js, Java, Go, REST and Python. Hyperledger is a collaborative effort created to advance blockchain technology by identifying and addressing important features for a cross-industry open standard for distributed ledger technologies(DLTs) that will transform the way business transactions are conducted globally. ... -
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BNB Chain
A Binance Smart Chain client based on the go-ethereum fork
The goal of Binance Smart Chain is to bring programmability and interoperability to Binance Chain. In order to embrace the existing popular community and advanced technology, it will bring huge benefits by staying compatible with all the existing smart contracts on Ethereum and Ethereum tooling. And to achieve that, the easiest solution is to develop based on the go-Ethereum fork, as we respect the great work of Ethereum very much.