The fast and light-weight Flowchain hybrid node library.

flowchain-node

The flowchain-hybrid is a fast and light-weight Flowchain hybrid node that can mine FlowchainCoin. It is the hybrid consensus node across the Flowchain hybrid blockchain network that connects to the public blockchain and provides the puzzle and λ values to the private blockchains.

Introduction

To bootstrap a new blockchain network, the mining pool uses to the Stratum protocol to join an existing blockchain network, such as Bitcoin and Ethereum, to generate the λ value.

Prerequisite

For MacOS users:

Command Line Tools for Xcode - Run xcode-select --install for installation
Node 9.4.0
NPM 5.6.0

For Ubuntu users:

Ubuntu 16.04 or above
Build-essential package - Run sudo apt-get install build-essential for installation
Node 9.4.0
NPM 5.6.0

How to Use

Use Flowchain testnet

Start the index.js Flowchain node:

$ node index.js 
Connect to testnet.pool.flowchain.io:3333 , id: 0
HTTP server started on port 55752.
Connected to server testnet.pool.flowchain.io:3333
Received shared work:  0xcc834fd577df20a16a1faa791633a9a47e3058241f5d07891ef6126f89907c22
[flowchain-dev0] Received new job #0xcc834f
 seed: #0xfcf7d78601c4fd5d68fc7f00bc0641
 target: #0x89705f4136b4a59731680a
New block found: 0x0010eaea9cc48cf9ec2b35b2230498cae773d2c9d27101670377bb5b00f9c255

Use the Stratum protocol eth_getWork to get the lambda value. The simplest way to do it is using curl:

$ curl -X POST -d '{"id":1,"jsonrpc":"2.0","method":"eth_getWork"}' http://localhost:55752/0x0/jollen

The response:

{"lambda":"5af90b68f9051a6fe1b5a2006cc345dbeafbf9df5d4ae8cc6399f515b51bdb19","puzzle":{"q1":["f","f","f","f"],"q2":["0","0","0","0"]}}

The response message indicates that the lambda value is 5af90b68f9051a6fe1b5a2006cc345dbeafbf9df5d4ae8cc6399f515b51bdb19, meaning that the entities has to solve the puzzle by this value in a fixed time interval. In short, the entity will receive Puzzle from peers, and the Puzzle has 8 to 10 shared works from the Ethereum pool.

Submit Transactions

Use flowchain-ledger to submit transactions.

var PeerNode = require('flowchain-ledger').PeerNode;
var node = new PeerNode();;
node.submit(data);

Bibliography

This work is based on the research paper.

[1] Chen, J. (2018). Hybrid Blockchain and Pseudonymous Authentication for Secure and Trusted IoT Networks In: The 2nd Workshop on Advances in IoT Architecture and Systems, Los Angeles, California, USA.

How to Cite

@article{flowchain_2018,
title={Hybrid Blockchain and Pseudonymous Authentication for Secure and Trusted IoT Networks},
journal={Proceedings of the 2nd Workshop on Workshop on Advances in IoT Architecture and Systems (AIoTAS2018)},
author={Chen, Jollen},
year={2018}
},

jollen/flowchain-hybrid