Discover hashgraph/hedera-smart-contracts Open Source project

Hashgraph is a superior consensus mechanism / data structure alternative to blockchain.

310

awesome-hashgraph

284

hedera-sdk-js

Hedera™ Hashgraph SDK for JavaScript/TypeScript

Hedera™ Hashgraph SDK for Java

256

hedera-sdk-java

Hedera Improvement Proposal

205

hedera-improvement-proposal

Solidity

134

hedera-mirror-node

Hedera Mirror Node archives data from consensus nodes and serves it via an API

The Guardian is an innovative open-source platform that streamlines the creation, management, and verification of digital environmental assets. It leverages a customizable Policy Workflow Engine and Web3 technology to ensure transparent and fraud-proof operations, making it a key tool for transforming sustainability practices and carbon markets.

122

guardian

Hedera™ Hashgraph SDK for Go

hedera-sdk-go

hedera-hts-demo

This is a demonstration UI for the Hedera Token Service. Written in JavaScript and Vue.JS

🟩 MyHbarWallet is a free, client-side interface helping you interact with Hedera™ Hashgraph.

MyHbarWallet

Welcome to the official Hedera documentation repository.

hedera-docs

Shell

hedera-local-node

Run your own local Hedera network for development purposes.

Implementation of Ethereum JSON-RPC APIs for Hedera

hedera-json-rpc-relay

Hashgraph implementation of functionality similar to Hyperledger

hl-mercury

Swirlds Hashgraph Platform SDK open source code.

hedera-platform

The protobuf message files defining the Hedera Hashgraph API

hedera-protobufs-java

templ

stablecoin-studio

All-in-one stablecoin configuration, issuance, and management

Mintbar is an open source NFT minter webapp for the Hedera ecosystem.

hedera-nft-minter

Hedera™ Hashgraph Proof-of-Action Microservice

hedera-proof-of-action-microservice

An example chat application, which uses the Hedera Consensus Service for pub-sub messaging.

hedera-sdk-rust

The Hedera™ Rust SDK

Rust

hedera-hcs-chat-js

hedera-nft-auction-demo

Demo NFT auction

Javascript SDK for managing DID Documents & Verifiable Credentials

did-sdk-js

Authoritative source of Hedera protobufs

hedera-protobufs

Shell

hedera-stable-coin-solidity-ethereum

Hedera Stable Coin implementation as a Solidity smart contract for Ethereum

Solidity

hedera-hcs-sxc-java

The HCS SXC (SDK eXtension Components) is a set of pre-built components that aim to provide additional functionality over and above the java SDK for HCS to make it easier and quicker to develop applications. This repository is only intended for demo purposes and not production applications.

This smart contract starter on Hedera helps developers create upgradeable contracts using a proxy pattern for seamless upgrades. Includes a sample contract and documentation for a quick start.

hedera-smart-contract-starter

Hedera Mirror Node Explorer for the Hedera Hashgraph DLT.

hedera-mirror-node-explorer

Support for the Hedera Hashgraph DID Method and Verifiable Credentials on the Hedera Java SDK

did-sdk-java

A performance optimized Google Protocol Buffers code generator, parser, and Gradle module.

pbj

Hedera Hashgraph Decentralized Identifier (DID) method specification

did-method

ledger-app-hedera

Hedera wallet application for Ledger Nano S

hedera-wallet-connect-js

This package is a messaging relay between decentralized applications and wallets in Hedera network based on Wallet Connect relays.

corda-notary-hedera

hedera-sdk-swift

Hedera™ SDK for Swift

Swift

hedera-stable-coin-demo

hedera-accelerator-defi-dex-ui

Tool to calculate price of transactions on Hedera network

hedera-sdk-cpp

C++ SDK for Hedera

C++

hedera-fee-tool-js

Hedera command line tools for developers

hedera-cli

This is a sample implementation of an ERC20 like token in a Hedera Consensus Service(HCS) decentralised application

hedera-hcs-token-example

This package is a messaging relay between decentralized applications and wallets in Hedera network based on Wallet Connect relays.

hedera-wallet-connect

Smart contract examples in various languages showing use of Hedera SDKs in tandem with public libraries

hedera-smart-contracts-libs-lab

The Hedera Transaction Tool demo application.

hedera-transaction-tool-demo

hedera-stablecoin-demo-archived

Hedera ERC-721 Equivalent Contract for Hedera Consensus Service.

hedera-hcs-erc721-sample

An example Hedera Hardhat project where you can use an instance of the Hedera JSON RPC Relay to test and deploy a smart contract.

hedera-hardhat-example-project

Hedera SDK specification repository.

hedera-sdk-reference

HTML

hedera-accelerator-defi-dex

Hedera NFT Utilities SDK for JavaScript

hedera-nft-sdk

Tools for verifying Hedera smart contracts using standard open source libraries.

hedera-sourcify

DEPRECATED Hardhat plugin for integration with hethers.js.

hedera-hardhat-hethers

Showcases the Hedera™ Proof-of-Action (PoA) API via a toy image pasteboard.

hedera-proof-of-action-demo-pasteboard

hedera-stable-coin

hashgraph-defi-alliance

Provides Log4j 2.x support for Hedera™ via an Appender that records logged events using the Hedera™ Consensus Service (HCS).

log4j2-hedera

Generated protobufs in Go for interacting with Hedera™ Hashgraph

hedera-protobufs-go

hedera-metamask-snaps

Metamask snaps offer the ability to create npm package that can be used to enhance the wallet capabilities for chains and DApps.

Onboarding handbook for Hedera Partners

partners-handbook

fabric-samples-hcs

Shell

hedera-subgraph-example

The Hedera Subgraph Example Project demonstrates how to create and deploy a subgraph to a local graph node using The Graph Protocol.

Default GitHub configuration for the Hashgraph organization

.github

fabric-hcs

hedera-theft-prevention-demo

Demonstrates a theft prevention use case using proof of action

Contributed by the AdsDax team. This demo application was created using the Hedera Go SDK that shows the end-to-end process as events are tracked, sent to the Hedera network and then collected after being processed by the Consensus Service.

hello-hedera-audit-log-go

full-stack-testing

JUnit 5 extensions and supporting libraries for performing Full Stack Testing of the Hedera Services application.

An opinionated CLI tool to deploy and manage standalone test networks.

solo

This is a temporary tool developed during integrating Hedera Consensus Service with Hyperledger Fabric.

hcscli

hedera-block-node

New Block Node services

Envoy proxy docker and docker-compose for Hedera testnet and mainnet consensus nodes

hedera-grpcWeb-proxy

State Proof Verifier library for Hedera in Go lang

hedera-state-proof-verifier-go

hedera-hcs-corda-demo

Integrating R3 Corda IOU Demo with the Hedera Consensus Service.

Hedera Exchange Rate Tool to send median of HBAR/USD exchange rate from various Exchanges to Hedera Network

hedera-exchange-rate-tool

logstash-output-hedera

Lambda function which monitors an S3 bucket and creates HCS transactions on changes made to files in the bucket

hedera-hcs-s3-monitor-java

A TCK (Technology Compatibility Kit) used to verify compliant implementations of a Hedera SDK

hedera-sdk-tck

The hedera-custodians-library library is a Typescript utility designed to simplify custodial wallet management. It provides developers with tools to abstract complex aspects of custodial wallets, allowing them to focus on their application's core logic.

hedera-custodians-library

Tools for hosting a graph node for the Hedera community.

hedera-the-graph