Configuration

This project can run at https://composer-playground.mybluemix.net/

or

From Debian 9 (64-bit), install docker and docker compose, then as root spin up runtime:

cat install-hlfv1.sh | bash

open your browser: http://localhost:8080/login

Basic Sample Business Network

This is the "Hello World" of Hyperledger Composer samples, which demonstrates the core functionality of Hyperledger Composer by changing the value of an asset.

This business network defines:

Participant BillingParticipant

Asset SampleAsset

Transaction BillingTransaction

Event SampleEvent

SampleAssets are owned by a BillingParticipant, and the value property on a SampleAsset can be modified by submitting a BillingTransaction. The BillingTransaction emits a SampleEvent that notifies applications of the old and new values for each modified SampleAsset.

To test this Business Network Definition in the Test tab:

Create a BillingParticipant participant:

{
  "$class": "com.khs.billing.BillingParticipant",
  "participantId": "Toby",
  "firstName": "Tobias",
  "lastName": "Hunter"
}

Create a SampleAsset asset:

{
  "$class": "com.khs.billing.SampleAsset",
  "assetId": "assetId:1",
  "owner": "resource:com.khs.billing.BillingParticipant#Toby",
  "value": "original value"
}

Submit a BillingTransaction transaction:

{
  "$class": "com.khs.billing.BillingTransaction",
  "asset": "resource:com.khs.billing.SampleAsset#assetId:1",
  "newValue": "new value"
}

After submitting this transaction, you should now see the transaction in the Transaction Registry and that a SampleEvent has been emitted. As a result, the value of the assetId:1 should now be new value in the Asset Registry.

Congratulations!