372 Open source projects that are alternatives of or similar to contracts

Solidity exercises

Official Archethic Blockchain node, written in Elixir

Ether-SWR is a React hook that fetches Ethereum data. It streamlines the chores to keep the internal state of the Decentralized App (DApp), batches the RPC calls to an Ethereum node and cache the responses

Inspired by the awesome list of awesome lists of awesome lists of...

This is a code repository for the corresponding video tutorial. In this video, we're going to build a Web 3.0 React Solidity Blockchain Application

Python client for interacting with the EtherDelta API and Smart Contracts.

Clarinet is a simple, modern and opinionated runtime for testing, integrating and deploying Clarity smart contracts.

Minimal Substrate node configured for smart contracts via pallet-contracts.

🔌 Ethereum Dapp Basic Typescript Starter

Modular framework for creating selective indexers and featureful backends for dapps

An example of usage IPFS in Ethereum Smart Contracts

Credits(CRDS) - An Evolving Currency For An Evolving Society

Specification for Storm: L2/L3 distributed storage and messaging with economic incentivisation leveraging LNP/BP ecosystem

Foundation developer docs

Flow Protocols powering synthetic asset and margin trading

Reference DAML application demonstrating a healthcare use case.

Alice smart contracts

Simple library to decode ethereum transaction and logs

The Fungible Token standard on the Flow Blockchain

0xcert protocol crowdsale contracts for Ethereum blockchain.

The genesis contracts of BNB Smart Chain.

🏵️ Let Your ETH Chill — Gasless Ethereum account abstraction with Flashbots

Android web3j example

Basic examples of Solidity smart contracts

Output Ethereum contract sizes with Hardhat 📐

🎚 Peripheral smart contracts for interacting with Uniswap V2

Lightweight, open source and magic-free framework for testing solidity smart contracts.

A Performant Blockchain that Isn't Confusing

🗓 Clone eventbrite on Ethereum, built in Solidity, TruffleJS, Web3js and React/Redux.

Fungible token implementation for the Ethereum blockchain.

Demo of integrating a JS webapp with the Pact smart contract langauge

🐍Uniswap V1 smart contracts

Integrated Ethereum implementation and tool suite focused on Solidity testing and development.

Framework to automate development of Algorand Assets and Smart Contracts.

A complimentary course for an understanding of blockchain and its development like custom blockchain, dapps, etc.

Off-the-shelf Solidity smart contracts

Web Client for Plasma Protocol

EVM-Simulator bachelor's thesis.

Better Call Dev backend

Unleash Bitcoin's full potential with decentralized apps and smart contracts. The documentation covers key aspects of the Stacks network and technology and provides tutorials and other helpful content for developers.

💎 Get 2000+ ERC-20 token balances with JavaScript. Supports Node.js and Deno

Build an DApp using react, redux, saga, truffle, metamask

Ethereum Smart Contract to prove a document's existence at some point by storing and verifying its hash.

Reference documentation on every gas price API and all the different formats

This is a white label solution to create a contribution crypto-wallet that can be used in your ICO campaign.

Awesome blockchain resources

Ethereum Smart Contracts Security Monitoring

Censorship-resistant trustless protocols for smart contract, generic & high-load computing & machine learning on top of Bitcoin

📑 Documentation generator for Solidity

A distributed smart contract package manager to create a better and shared authority in the space.

Hääl - Anonymous Electronic Voting System on Public Blockchains

Colony Token and Crowdsale Contracts

More Viable Plasma (MoreVP) contract with Limbo Exits

Create and deploy Truffle projects with no configuration.

Smart contracts for https://app.astrodao.com

A Protocol for trading decentralized derivatives on Ethereum

Learning NEO Step by Step

Node for JeChain - an experimental smart contract blockchain network

Solidity library for advanced fixed-point math

Reference implementation of the Stellar Turrets protocol