Features

Feature Specific Cordapps

This folder features several sample projects, each of them demonstrates different specific features of corda.

Blacklist -- Attachment:

This CorDapp allows nodes to reach agreement over arbitrary strings of text, but only with parties that are not included in the blacklist uploaded to the nodes as an attachment.

Sendfile -- Attachment:

This Cordapp shows how to upload and download an attachment via a flow.

Whistleblower -- Confidential Identity :

This CorDapp is a simple showcase of confidential identities (i.e. anonymous public keys).

Autopayroll -- CordaService:

This Cordapp shows how to trigger a flow with vault update(completion of prior flows) using CordaService & trackby.

Trade Reporting -- ObservableStates:

This CorDapp shows how Corda's observable states feature works. Observable states is the ability for nodes who are not participants in a transaction to still store them if the transactions are sent to them.

Prime Number -- Oracle:

This CorDapp implements an oracle service that allows nodes to:

• Request the Nth prime number
• Request the oracle's signature to prove that the number included in their transaction is actually the Nth prime number

Car Insurance -- QueryableState:

This CorDapp demonstrates QueryableState works in Corda. Corda allows developers to have the ability to expose some or all parts of their states to a custom database table using an ORM tools. To support this feature the state must implement QueryableState.

Sanctionsbody -- ReferenceStates:

This CorDapp demonstrates the use of reference states in a transaction and in the verification method of a contract.

This CorDapp allows two nodes to enter into an IOU agreement, but enforces that both parties belong to a list of sanctioned entities. This list of sanctioned entities is taken from a referenced SanctionedEntities state.

Heartbeat -- SchedulableState:

This CorDapp is a simple showcase of scheduled activities (i.e. activities started by a node at a specific time without direct input from the node owner).

CustomLogging -- YoCordapp:

This cordapp has some examples on how to setup custom logging with corda for either json logging and other tooling.