subhasmitasahoo/Hyperledger-Fabric

A sample application using hyperledger fabric

A sample application using hyperledger fabric

This is a sample app created using tuna-app code structure as the basic framework

Prerequisites for Installing Hyperledger Frameworks

• cURL
• Node.js
• npm package manager
• Go Language
• Docker
• Docker Compose

Installation for MacOS

• curl -V
• Check https://nodejs.org/en/download/ for installing Node and NPM
• Installing GO
  • cd ~
  • sudo curl -O https://storage.googleapis.com/golang/go1.9.2.darwin-amd64.pkg (Check version at https://golang.org/dl/)
  • open go1.9.2.darwin-amd64.pkg
  • echo $GOPATH
  • If nothing comes in the above step, go to .profile(or .bash_profile) and add
    1. export GOPATH=$HOME/go
    2. export PATH=$PATH:$GOPATH/bin
    Then run source .profile to tun these new paths.
• Visit https://www.docker.com/docker-mac to install docker for mac (Installing docker for mac or docker toolbox will also download docker-compose)

Installing hyperledger Fabric

• curl -sSL https://goo.gl/Q3YRTi | bash (Check Check https://hyperledger-fabric.readthedocs.io/en/latest/samples.html#binaries for latest URL)
• docker images
• If the images are not in latest tag run docker tag hyperledger/fabric-tools:x86_64-1.0.2 hyperledger/fabric-tools:latest (Replace fabric-tools:x86_64-1.0.2 accordingly)
• export PATH=$PWD/bin:$PATH

Installing hyperledger Fabric Sample Code

• git clone https://github.com/hyperledger/fabric-samples.git

Getting started with the network

• cd fabric-samples/first-network
• ./byfn.sh -m generate
  • It generates all the certificates, keys and Genesis block required for network configuration
• ./byfn.sh -m up
  • It starts the network
• ./byfn.sh -m down
  • It shuts down the network

Writing a sample application

• Download the education repository
• git clone https://github.com/hyperledger/education.git
• cd education/LFS171x/fabric-material/tuna-app
• docker rm -f $(docker ps -aq) (To remove pre-existing containers)
• ./startFabric.sh (To start the network)
• npm install (To install required packages from package.json file)
• node registerAdmin.js (Register the admin)
• node registerUser.js (Register the user)
• node server.js (Start the application)
• open localhost:8000 and your app would be running

Deploying the modified codechain

• Move your chaincode (i.e. invoice-chaincode.go) to /opt/gopath/src/github.com/invoice-app (Check the name in startFabric.sh and accordingly replace invoice-app)
• If the above directory is not present, then create the directoty and move
• Troubleshooting
  If node registerUser.js gives error, run rm -rf .hfc-key-store/ and then run the command for both admin and user in order.