CS480 Blockchain Application

Poll Creator using Blockchain API

Requirements Analysis

Project Requirements

• Utilize a block-chain platform to achieve functionality

Application Requirements

Shall Requirements

• Create a new poll
• Find existing polls to vote for
• Submit voting option selections to the poll
• Polls are valid only for a certain length of time
• Poll results are immutable once the deadline passes

Should Requirements

• User details are stored along with user's voting selections
• Poll results include statistics and other desirable user metadata'

Execution of Steps

1. [Poll Creator] creates a new poll
2. [Poll Creator] inserts poll details
3. Application publishes poll
4. (Substep) User details are verified (extends)
5. [Poll Voter] finds a poll
6. [Poll Voter] selects voting choices
7. (Substep) Voting selection transaction is verified by [Blockchain API] (includes)
8. [Blockchain API] adds vote selection to the blockchain
9. Poll expires and triggers generation of poll results
10. (Substep) Poll result analysis and statistics are generated (extends)

Frontend Layout

• Blockchain Poll Homepage -> index.html
  • Create -> creator/index.html
    • Submit Page -> creator/submit.php
  • Vote -> voter/index.php
    • Poll Page -> voter/poll.php
      • Submit Page -> voter/submit.php
    • Delete Page -> voter/delete.php
  • Results -> results/index.php
    • Results Page To Do
    • Delete Page -> results/delete.php
  • Team -> about/index.html

Setup

Option 1

1. VM

or

Option 2

1. Source Code (GitHub)
2. MySQL
3. Multichain/Blockchain
4. Server

Option 1

1. Virtual Machine

• download VM
  • https://drive.google.com/open?id=0B1ooiGhv36AZdG1MUjUxUEJLbTA
• load cs480-vm.ovf or cs480-vm-disk1.vmdk into VM
  • login password: a
• start multichain
  multichaind cs480 -daemon
• site contained at cs480.com

Option 2

1. Source Code

• clone repository
  • https://github.com/SamWu157/CS480
• install curl

2. MySQL Setup

• install MySQL
  • https://dev.mysql.com/downloads/installer/
• create users and grant permissions
  • on root account create cs480 user and grant permissions

  CREATE USER 'cs480'@'localhost' IDENTIFIED BY 'password';  
  GRANT SELECT,INSERT,CREATE,DELETE,DROP ON * . * TO 'cs480'@'localhost';

• create databases and tables
  • on cs480 user create polls database and creators table

  CREATE DATABASE polls;
  use polls;
  CREATE TABLE creators (id TEXT, poll TEXT);

3. Multichain/Blockchain Setup

• install multichain
  • http://www.multichain.com/download-install/
• create cs480 blockchain

multichain-util create cs480
multichaind cs480 -daemon

• change password and port in config folder
  • password can be found in ~/.multichain/cs480/multichain.conf
    • under rpc-password
  • port can be found in ~/.multichain/cs480/params.dat
    • under default-rpc-port

4. Server

• install a web server and add php support
  • I am using Apache on Ubuntu 16
    • https://help.ubuntu.com/community/ApacheMySQLPHP