Hyperledger Explorer

Hyperledger Explorer is a simple, powerful, easy-to-use, highly maintainable, open source browser for viewing activity on the underlying blockchain network.

Directory Structure

├── app            Application backend root
	├── db			   Postgres script and help class
	├── listener       Websocket listener
	├── metrics        Metrics
	├── platform       Blockchain platform
	  	├── fabric     Fabric platform specific
	├── service        The service
	├── socket		   Push real time data to front end
	├── test		   Endpoint tests
	├── timer          Timer to post information periodically
	└── utils          Various utility scripts
├── client          Web Ui

Requirements

Following are the software dependencies required to install and run hyperledger explorer

• nodejs 8.9.x (Note that v9.x is not yet supported)
• PostgreSQL 9.5 or greater

Hyperledger Explorer works with Hyperledger Fabric 1.1. Install the following software dependencies to manage fabric network.

• docker 17.06.2-ce [https://www.docker.com/community-edition]
• docker-compose 1.14.0 [https://docs.docker.com/compose/]
• node 8.11.2
• npm 5.10.0

Clone Repository

Clone this repository to get the latest using the following command.

• git clone https://github.com/hyperledger/blockchain-explorer.git.
• cd blockchain-explorer.

Database setup

Connect to PostgreSQL database.

• sudo -u postgres psql

Run create database script.

• \i app/persistance/postgreSQL/db/explorerpg.sql
• \i app/persistance/postgreSQL/db/updatepg.sql

Run db status commands.

• \l view created fabricexplorer database
• \d view created tables

Fabric network setup

Setup your own network using Build your network tutorial from Fabric. Once you setup the network, please modify the values in config.json accordingly.

Running hyperledger-explorer

On another terminal.

• cd blockchain-explorer

• Modify config.json to update network-config.

  • Change "fabric-path" to your fabric network path, example: "/home/user1/workspace/fabric-samples" for the following keys: "tls_cacerts", "key", "cert".
  • Final path for key "tls_cacerts" will be: "/home/user1/workspace/fabric-samples/first-network/crypto-config/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt".

• Modify config.json to update one of the channel

  • pg host, username, password details.

 "channel": "mychannel",
 "pg": {
		"host": "127.0.0.1",
		"port": "5432",
		"database": "fabricexplorer",
		"username": "hppoc",
		"passwd": "password"
	}

If you are connecting to a non TLS fabric peer, please modify the protocol (grpcs->grpc) and port (9051-> 9050) in the peer url and remove the tls_cacerts. Depending on this key, the application decides whether to go TLS or non TLS route.

Build Hyperledger Explorer

On another terminal.

• cd blockchain-explorer/app/test
• npm install
• npm run test
• cd blockchain-explorer
• npm install
• cd client/
• npm install
• npm test -- -u --coverage
• npm run build

Run Hyperledger Explorer

From new terminal.

• cd blockchain-explorer/

• ./start.sh (it will have the backend up).

• Launch the URL http://localhost:8080 on a browser.

• If the blockchain-explorer was used previously in your browser be sure to clear the cache before relaunching.

Swagger Documentation

• Once the blockchain-explorer has been launched go to http://localhost:8080/api-docs to view the Swagger documentation

Logs

• Please visit the ./logs/console folder to view the logs relating to console and ./logs/app to view the application logs and visit the ./logs/db to view the database logs.
• Logs rotate for every 7 days.

License

Hyperledger Explorer Project source code is released under the Apache 2.0 license. The README.md, CONTRIBUTING.md files, and files in the "images", "snapshots", and "mockData" folders are licensed under the Creative Commons Attribution 4.0 International License. You may obtain a copy of the license, titled CC-BY-4.0, at http://creativecommons.org/licenses/by/4.0/.