Proof of Existence

This project demonstrates using the Hyperledger Fabric blockchain to store a document hash so that its existence can be later proved through transaction queries.

Requirements

Docker - 18.03.1-ce or higher
Docker Compose - v1.21.1 or higher
node - v8.10.0
Git client
Windows needs OpenSSL installed into C:/OpenSSL-Win64
- Goto https://slproweb.com/products/Win32OpenSSL.html and pick the full Win64 package

Installation

git clone https://github.com/blocledger/poe-v1.git

cd poe-v1

npm install -g gulp
npm install -g mocha
npm install -g bower
npm install

Setting up a test blockchain using Docker

A Hyperledger Fabric blockchain network can be run on your local machine using docker containers. The configuration and setup files will build a network that consists of one orderer, two peers, and one CA.

The instructions below assume that you already have docker installed and running.

Pull images from DockerHub

Pull the fabric chaincode environment image using the 1.2.0 tag.

docker pull hyperledger/fabric-ccenv:1.2.0

Initial network setup

Run the network setup script which will download the rest of the docker images, build docker-compose.yaml, create all certificates, and build the genesis block.

cd test/fixtures-V1
./network_setup.sh up mychannel

To check that the containers are running

docker ps

To see what version peer you are running

docker exec -it peer0.org1.blocledger.com bash
peer version
exit

Go back to the top poe directory and create the channel

cd ../..
node createChannel.js

Running the application

node api.js

Once the application is running launch the web interface using localhost:3000 as the URL. Once it's up go to /Admin/Add User/ and add a user such as test@blocledger.com with a password of your choice.

Once the user has been added, login by clicking on Click to log in in the upper right corner of the page.

Next click the Deploy button on the Admin page to install the poe chaincode.

After the chaincode has been installed documents can be added and verified.

Stopping and restarting the network

To stop the containers

cd test/fixures-V1
docker-compose -p poe stop

To start the previously created network

cd test/fixures-V1
docker-compose -p poe start

Deleting the network

Use this procedure to completely delete the network and clean up all of the files for a fresh start.

ctrl-c the node application
cd test/fixures-V1
./network_setup.sh down

cd ../..
rm -r tmp/keyValStore_v1/

Testing

To run both the linter and code style checker run gulp with no parameters.

To run testing that will generate transactions and exercise all of the server capabilities run gulp test.

Note: The chaincode needs to be deployed before running the test.

Debugging

Turn additional debug prints with

DEBUG='poe' HFC_LOGGING='{"debug": "console"}' node api.js
  or
export DEBUG='poe'
export HFC_LOGGING='{"debug": "console"}'
node api.js

Acknowledgement

This project uses the Hyperledger Fabric node SDK and its examples to connect to Hyperledger Fabric.

License

abcbuddy/poe-v1

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