A LOYALTY PLATFORM APPLICATION USING HYPERLEDGER FABRIC

This platform is to allow manufacturer(P&G here) directly award their customer for being a loyal customers and customers can redeem those tokens at any of the retailer's store associated with the manufacturer.

Use Case digram

Flow diagram

1. Blockchain operator setup the private blockchain network having 3 organizations, 3 certificate authorities and 1 channel.
2. The end user ( admin, user, consumer ) interacts with ReactJS UI for register, update , grant tokens and reedem tokens.
3. The ReactJS platforms uses API gateway to interact with the blockchain network.
4. The ExpressJS API application uses fabric SDK to interact with the nwtwork.

Technologies used

1. Hyperledger Fabric 1.4.6
2. Node.js
3. React.js

Software versions

System	Driver	Version
Platform	Hyperledger Fabric	1.4.6
Docker	Docker	18.09.09
Language	Go	1.11
Node	node	10.20
UI	React	latest

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Steps to replicate locally

1. Clone this repository
2. Install required softwares for this app
3. Start the fabric network using shell script
4. Start the API server
5. Start the Client APP

Step 1. Clone the repository

git clone git@github.com:kuldeep23907/loyalty-token-using-hlf.git

cd loyalty-token-using-hlf

Step 2. Install required softwares (if you already have all this with proper versions, please skip). Also this will take few minutes.

They are hyperledger fabric 1.4.6, golang, docker, docker-composer, node, python3

chmod 777 prepare.sh

sudo ./prepare.sh light

source environment

If it fails, please install all the above mentioned software by refrerring to file prepare.sh one by one. Without this, we will not be able to test the application.

Step 3. Start the fabric network using shell script

chmod 777 operate.sh

sudo ./operate.sh up

When you run a script, the following things happen in order:

Generate certificates through the "artifacts/crypto-config.yaml" file.

Generate channel artifacts through the "artifacts/configtx.yaml" file.

Deploy the required containers on the Fabric network through the docker-compose command and the "arifacts/docker-compose.yaml" file.

Run the "scripts/script.sh" file using the cli docker container.

When you run a script in the cli docker container, the following things happen in order:

Create a loyaltyplatformchannel channel.'

All peers join the loyaltyplatformchannel channel.

Update anchor peers for each organization.

Install chaincode on all peers.

Instantiate chaincode in manufacturer peer0.

Invoke the initLedger method to seed P&G as manufacturer and an admin in the ledger.

For more details, see the contents of the operate.sh file.

Step 4. Start the web server

cd web-app/servers/

npm install

nodemon app.js

Step 5. Start the client app

cd ../../client/

npm install

npm start run

Now everything is setup and testing could be started. Go to http://localhost:3000 to see the client app running. Use id: admin and password: adminpw for admin login to start the flow. Please refer to demo video link here to proceed: https://www.youtube.com/watch?v=olDkOoSwx44&t=386s

Stop the network

After testing is done or an error occurs or to stop the network, go to loyalty-token-using-hlf and run the following scripts

chmod 777 stopNetwork.sh

chmod 777 teardown.sh

sudo ./stopNetwork.sh

sudo teardown.sh

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About the fabric private blockchain network

Network and channel architecture

Ledger Structs Relationship