Samples

A listing of CorDapps, community projects and core code. If you have an open-source CorDapp or project that you would like to feature here, get in touch at devrel@r3.com. Looking for inspiration? Take a look at our list of science projects or see our good first issues.

CorDapp templates

When developing a CorDapp from scratch, you should use either the Java CorDapp Template or the Kotlin CorDapp Template

Sample CorDapps developed by R3

R3 has developed a set of sample CorDapps to show developers how to implement specific functionality. These samples are all Apache 2.0 licensed, so feel free to use them as the basis for your own CorDapps.

Business Networks Toolkit

Business Networks (BNs) are an abstraction layer on top of Corda Network, that allows multiple business applications to work and to interoperate within a single global shared environment. The Business Networks Toolkit is an Open Source project maintained by R3. It contains a set of utilities that aim to help Business Network Operators to run their Business Networks

Community Cordapps and Projects

  •  Auction CorDapp – developed by Vardan Nadkarni – CorDapp that allows users to perform public or private auctions
  •  Be-Well – developed by Siddhartha Sengupta – CorDapp that allows clients to purchase wellness services via brokers
  •  Braid – developed by Bluebank – High performance reactive RPC library for exposing your flows and services in a secure way, with very little code, and to consume them in multiple languages and runtimes such as Javascript on node.js
  •  Cached Distribution List – developed by Tushar Singh Bora – CorDapp that downloads and caches a list of parties on the node at a fixed interval. The node can then easily distribute information to all the nodes in this list
  •  Contract and State Upgrades – developed by Amol Pednekar – CorDapp showing how to upgrade a state and its contract simultaneously
  •  Tokens using OwnableState – developed by Amol Pednekar – CorDapp showing one way to model tokens using OwnableState
  •  Corbeans – developed by Manos Batsis – Corda integration for Spring Boot
  •  CordaGen – developed by Janis Olekss – Autogenerates CorDapp structure based on user-defined node roles
  •  Cordite – developed by the Cordite Foundation – Open-source CorDapp that provides decentralised economics and governance services. It is founded by three key concepts, the DGL (distributed general ledger), the DAO (decentralised autonomous organisation) and Metering. Cordite is regulatory friendly, enterprise ready and finance grade. To find out more, please reach out on the #cordite channel on slack.corda.net
  •  Cordite Network Map Service – developed by the Cordite Foundation – Webserver implementing the Corda doorman and network map protocols
  •  Delivery vs Payment Asset Transfers – developed by Balaji More – CorDapp that allows for delivery-vs-payment of an asset coordinated by a clearing house
  •  Encumbrance Bakery – developed by Tushar Singh Bora – CorDapp using encumbrances to prevent cakes from being sold or consumed after their expiry date
  •  Exchange Rates Oracle – developed by Milen Dobrinov – Oracle for interacting with the Foreign exchange rates API
  •  Loan-Finance Application – developed by Shivan Sawant – CorDapp for approving or denying loans based on credit agency ratings
  •  FX Trading CorDapp – developed by Dinesh Rivankar – CorDapp for FX trading
  •  Insurance Claim CorDapp – developed by Manila Gauns – CorDapp for confidentially settling insurance claims
  •  Ktor RPC – developed by S-Labs – Ktor webserver that communicates with Corda nodes
  •  node.js GraalVM Server – developed by Nitesh Solanki – Application that imports the Corda RPC library into node.js to issue and fetch IOUs, running on GraalVM
  •  NodePad – developed by Fred Mastot and Viktorija Trubaciute – A toolkit for node monitoring and operations
  •  Notary Change – developed by Daniel Krajnik – Shows how to use Corda’s NotaryChange flow
  •  Oraclize API – developed by Oraclize – Oracle service that uses authenticity proofs to prove that data fetched from the original data-source is genuine and untampered with
  •  Partiture – developed by Manos Batsis – A compact component framework for your CorDapps. Currently, its primary goal is to simplify flow composition
  •  Project Ubin – development managed by Accenture – CorDapp for real-time gross settlement
  •  Property Listing – developed by Parnika Sharma – CorDapp allowing nodes to upload property listings and pull these listings from other nodes
  •  Spring WebFlux Webserver – developed by Dan Newton – Spring WebFlux webserver for Corda nodes
  •  Obligation Spring Webserver – developed by Clyde D’Cruz – Spring webserver for the Obligation CorDapp
  •  JSF Template for Eclipse – developed by Reto Husmann – CorDapp template for Eclipse with integrated JSF webserver
  •  State Upgrades – developed by Nitesh Solanki – CorDapp showing how to upgrade a state without upgrading its contract
  •  Yo! Docker – developed by Ajitha Thayaharan – CorDapp showing how to deploy a network of nodes using Docker