50.037 Blockchain Project

This project aims to simulate blockchain circulation in a small scale. On top of normal blockchain minings and transactions, it also supports simulation of Selfish Mining Attack and 51% Attack (Majority attack)

Getting Started

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Prerequisite

• Assumption only one Python version 3.7 installed in the computer

Installation

• Clone the project
• On the root folder, run .\blockchain\Scripts\activate on bash terminal
• run python -m pip install -r requirements.txt

Usage Methods

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Blockchain environment

Initalization

We simulate normal blockchain environment with 2 different miners and 1 SPV client.
In 3 different terminals, run the following codes:

python MinerApp.py -p 5004 -s normal

python MinerApp.py -p 5005 -s normal

python SPVApp.py

Open another terminal to run the control script

python Postman.py -m 1

Selfish Mining Attack

We simulate the selfish mining attack with 2 different miners and 1 SPV client. 1 miner will act as a normal miner and the other miner will be the selfish miner.
In 3 different terminals, run the following codes:

python MinerApp.py -p 5004 -s selfish

python MinerApp.py -p 5005 -s selfish

python SPVApp.py

Open another terminal to run the control script

python Postman.py -m 3

51% Attack (Majority Attack)

We simulate the 51% mining attack with 3 different miners and 1 SPV client. 1 miner will act as a normal miner and the other 2 miners will act as the malicious miners.
In 4 different terminals, run the following codes:

python MinerApp.py -p 7337 -s 51

python MinerApp.py -p 7338 -s 51

python MinerApp.py -p 5005 -s 51

python SPVApp.py

Open another terminal to run the control script

python Postman.py -m 4

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Refer to Writeup.pdf for more information

Authors

• Andre Hadianto Lesmana (1002837)
• Antonio Miguel Canlas Quizon (1003014)
• Kenneth Ng (1002793)
• Teo Yong Quan (1002828)