Hyperledger Fabric v1.4.1 + Composer version 20.8 + Explorer 3.9 + MultiHost + MultiOrg + Multipeer + Multichannel

Part of a PoC to explore blockchain solutions. I choosed Hyperledger a open source community. Hyperledger Fabric and Hyperledger composer has used for this projec.

Network Setup:

The network will contain two Nodes ( Hosts) Node 00 and Node01 and mapped to Org1 & Org2 respectively.

• Host1 : Orderer, CA0, Org1- Peer0, peer1, peer2
• Host2 : CA1, Org2- Peer0, peer1, peer2

we will have 1 Orderer and 2 CA’s as recommended and best practice followed that each Org should have its own CA and multiple orderers to avoid a single point of failure. ( We will add orderers,Orgs, Peers separately to exsisting setup)

Prerequisites:

• Phy/Virtual Machine : Running Ubuntu OS 16.4 LTS
• Env setup : curl, Docker, Docker-compose, Go, Hyperledger binaries, Nodejs, composer, Ref
• Follow the instructions for all two nodes and do reboot. Ensure docker services is running.

Once you ready with your network and prerequisites. Note : I created script Prereq_HLFv11.sh

Down the hyperledger binaries. Ref : https://hyperledger-fabric.readthedocs.io/en/release-1.4/install.html

curl -sSL http://bit.ly/2ysbOFE | bash -s 

Here you will see download_hlf.sh, and execute to download_hlf.sh

$ ./download_hlf.sh

Once the docker images are set, now move to composer folder and generate articrafts. Replace the IP addresses in NODE01 and NODE02 with your own IPs and Run the script

$cd myhlf_compser && vi generate.sh
$start2fabric_org1.sh

At this point, your first node is ready in the network, if you have done these instructions for Node00 machine, then we need to copy same to second node, Doing this will ease our work. Move back to parent folder :

$cd ~ 
$tar cf myhlf_compser.tar ./myhlf_compser/ 

Login to node01 :
$scp user@node00:/path_to_the_tar file .

extract the tar file and change directory to scripts bash $cd myhlf_compser Now run the run bash $./start2fabric_org2.sh

This will fetch the keys and join the Peer nodes. Now your Fabric is ready

Hyperledger Composer Setup

Now move back to first node node00 for composer install

Prerequisites:

1. npm version 6.2.0
2. node version 8.9.1
3. composer-cli version v0.20
4. composer-rest-server version 0.20
5. generator-hyperledger-composer version 0.20
6. yo version 2.05

$npm install -g yo [email protected] [email protected] [email protected] [email protected] [email protected]

Note : composer and fabric are mostly bended with version dependency. Hence need to carefull before deployment. Ensure you have the given version., Now you ready to create admincard for sample testing, Run the script.

$./createPeerAdminCard.sh

$ composer network ping –c peeradmin@sample-network 

You will get ping response as below screen shoot

Now we are ready to access the network through composer

Run this command on your terminal and open the browser to access your network.

$ composer-playground -p 8181 &

on Browser
http://server_IP:8181 

You Can Play around now.

Lets start REST services for the same network.

Hyperledger Composer includes a standalone Node.js process that exposes a business network as a REST API. The LoopBack framework is used to generate an Open API, described by a Swagger document.

To launch the REST Server simply type:

$composer-rest-server

You will then be asked to enter a few simple details about your business network. An example of consuming a deployed business network is shown below.

? Enter the name of the business network card to use: alice@sample-network
? Specify if you want namespaces in the generated REST API: always use namespaces  
? Specify if you want to enable authentication for the REST API using Passport: No 
? Specify if you want to enable event publication over WebSockets: Yes             
? Specify if you want to enable TLS security for the REST API: No

To restart the REST server using the same options, issue the following command:
   
   composer-rest-server -c alice@sample-network -n always -w true
   
   Discovering types from business network definition ...                    
   Discovered types from business network definition                          
   Generating schemas for all types in business network definition ...         
   Generated schemas for all types in business network definition                 
   Adding schemas for all types to Loopback ...                                    
   Added schemas for all types to Loopback                                          
   

  Web server listening at: http://localhost:3000

  Browse your REST API at http://localhost:3000/explorer