https://github.com/ldaponte/block-chain-app

https://github.com/ldaponte/block-chain-app

Last synced: about 23 hours ago
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• Host: GitHub
• URL: https://github.com/ldaponte/block-chain-app
• Owner: ldaponte
• Created: 2017-12-22T15:24:50.000Z (about 7 years ago)
• Default Branch: master
• Last Pushed: 2017-12-28T22:40:59.000Z (about 7 years ago)
• Last Synced: 2023-11-30T07:23:05.891Z (about 1 year ago)
• Language: JavaScript
• Size: 28.3 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Running instance at:  

##http://block-chain-client1.westeurope.cloudapp.azure.com

# block-chain-app

# Technologies used:

##web3 version .19

Used to communicate with the ethereum block chain and contracts using the Generic JSON RPC

##Node.js

Used on the Raspberry pi to run scripts used to communicate with the NFC scanner

###mfrc522 library

Used to communicate with the RFIO RC522 NFC scanner hardware

##Meteor

Used to create the web front end that interacts with the orders Ethereum contract

##MongoDB

Caches the orders from the Ethereum orders contract

##Raspberry Pi Model 3 (Wifi model)

Using the Pi's GPIO SPI interface to communicate with the NFC/RFID tag reader hardware

##Remix web based Solidity IDE

https://ethereum.github.io/browser-solidity

Used to edit, debug, compile, and prepare the web deployment script

##GETH

Used to deploy the compiled solidity code and interact with the Ethereum transaction node.

##MS Azure Ethereum Consortium

Created simple three server private Ethereum network with two miners and one transaction node.  Also created a fourth Ubuntu VM to host the Meteor contract app

#Project files:

##pi folder

###scan_ids.js

This script poles the NFC scanner hardware waiting for a card/tag to be read.  Once it reads the tag, it takes the unique ID from the tag and creates a contract order, then

pushes the order to the Ethereum contract

##sol folder

###orders_contract.sol

The solidity orders contract

##dapp folder

###orders.js

The Meteor client + server script used to display the Ethereum contract orders.  It subscribes to the contract's events and displays each new order as their mined by the Ethereum miners.

###orders.html

The Meteor HTML template that rendres a simple HTML table to display the submitted orders

###lib/init.js

The Meteor configuration file containing the path to the Ethereum transaction node