Modular smart contracts

OpenZeppelin Contracts is a library of modular, secure, and reusable smart contract components designed for the development of decentralized applications. It provides a foundational framework for building standard-compliant contracts, offering battle-tested implementations for token standards, access control, and common utility patterns. The project distinguishes itself through its comprehensive support for complex architectural patterns, including proxy-based upgradeability, role-based access control, and account abstraction. It enables developers to implement modular logic injection via hoo

This project is a Solidity smart contract library providing a collection of audited, reusable templates and building blocks for developing secure blockchain applications on the Ethereum Virtual Machine. It serves as a foundational toolkit for smart contract development, encompassing a secure mathematical library, role-based access frameworks, and reference implementations of industry-standard token specifications. The library focuses on reducing security risks through community-vetted contract components and audited templates. It provides specific implementations for creating fungible and non

Contracts is a collection of reusable, deployable smart contracts and modular building blocks for EVM blockchains. It provides standard token implementations, marketplace trading components, decentralized governance systems, and revenue splitting logic, enabling developers to build applications using pre-built smart contract libraries and standardized token interfaces. The framework features architectural patterns that support atomic asset bundling, batch transaction multiplexing, and configurable drop mechanisms for scheduled digital asset releases. It combines extensible base contracts wit

Solmate is a Solana program framework and smart contract library providing gas-optimized blockchain primitives. It serves as a development kit for implementing SPL tokens and secure access control systems on the Solana blockchain. The project focuses on reducing compute unit usage and transaction costs through resource-efficient building blocks. It provides standardized components for token logic, balance tracking, and authorization primitives designed to restrict sensitive smart contract functions. The framework employs opinionated patterning and primitive-based composition to structure pro

This project is a high-level programming language and compiler toolchain designed for writing and deploying smart contracts on decentralized virtual machines. It provides a framework for creating self-executing code that operates within deterministic execution environments, ensuring that distributed nodes reach identical state transitions through stack-based machine execution. The language enables the development of complex decentralized logic by supporting state-machine-based contract structures and modular composition. It includes built-in capabilities for cryptographic signature verificati

Solmate is a collection of gas-optimized building blocks and libraries for developing secure and efficient smart contracts on the Solana blockchain. It provides a set of standardized tools including an access control framework for managing user roles and ownership, a high-precision fixed-point math library for decimal and signed integer calculations, and a Merkle proof verifier for validating data inclusion. The project provides secure token implementations for issuing and transferring fungible and non-fungible tokens. These implementations include safety checks to prevent silent failures dur

Casbin is an authorization library that provides a model-based engine for enforcing access control across diverse application environments. It decouples authorization logic from application code by using a configuration-driven approach, allowing developers to define access rules and evaluation logic independently. The system supports a wide range of access control models, including role-based, attribute-based, and relationship-based patterns, which are evaluated at runtime to determine if a subject is permitted to perform an action on a resource. The project distinguishes itself through a hig

GraphQL-Ruby is a Ruby library for building GraphQL APIs with a strongly typed schema and a dedicated query execution engine. It provides a comprehensive framework for mapping application objects to a formal type system, enabling structured data fetching through defined resolvers. The project distinguishes itself with advanced performance and delivery mechanisms, including a data loader for batching and caching to prevent N+1 query patterns. It supports high-performance data delivery through incremental response streaming, deferred query responses, and parallel data fetching using fibers. Add

Stellar Core is the primary software implementation of the Stellar blockchain network, serving as a distributed ledger and a Federated Byzantine Agreement system. It functions as a core node that maintains the shared state of the network and provides a runtime environment for executing WebAssembly smart contracts. The project enables the creation and management of digital assets, including the implementation of decentralized exchanges through distributed orderbooks and automated liquidity pools. It facilitates cross-border payment settlement by routing assets via path payments and bridging di

Hardhat is a smart contract development framework and EVM tooling suite designed for the full lifecycle of Ethereum and EVM-compatible applications. It serves as a development environment for compiling, testing, and deploying smart contracts, providing a local blockchain simulation and a programmable task runner. The framework is distinguished by its extensive simulation capabilities, including the ability to fork remote network state and manipulate block time or account balances. It features a hook-based plugin system that allows for the extension of core functionality and the creation of cu