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Overview

This repository implements a proof-of-concept version of LightChain blockchain.

Running Simulation

Setting the parameters:

Modify the simulation parameters in simulation.config, which looks something like this:

nodeCount = 3 // number of nodes to spawn
iterations = 100 // The number of transactions to generate
pace = 1 // The time between every transaction generated (in seconds)
alpha = 10  // upper limit of attempts to search for validators
txmin = 1 // minimum number of Tx in a block
signaturesThreshold = 1 // minimum number of signatures to accept a block
initialBalance = 20  // balance to start with at launch
levels = 30  // length of nameID (levels of skip graph)
Mode = True // honest or malicious
validationFees = 1 // reward received by validator

Token = 20 // Represents any type of asset

// Mode of lightchain 
//(False -> original || True -> Smartcontract)
ContractMode = False

Pre-requisite redarding smart contract integration

In solidityContracts folder put your .sol file. Detailed instructions are given in docs.

Running the simulation

Then you have to build the container. You need to do this step for any change in the code.

make build-container

Then you run the docker container. If needed, you can change the name of the docker container simdocker to anything else, provided you replace all other instances of the name subsequently.

sudo docker run --name simdocker -d lightchain

Then, to copy all the logs and the simulation results, use the following command:

sudo docker cp simdocker:/app/ .

Removing existing docker containers

If you have too many containers that are stopped and you want to remove them, the following command is useful:

sudo docker rm $(sudo docker ps -a -q)

Publications

  • Hassanzadeh-Nazarabadi, Yahya, Alptekin Küpçü, and Öznur Özkasap. "LightChain: Scalable DHT-Based Blockchain." IEEE Transactions on Parallel and Distributed Systems 32.10 (2021): 2582-2593. (PDF)
  • Hassanzadeh-Nazarabadi, Yahya, Nazir Nayal, Shadi Sameh Hamdan, Öznur Özkasap, and Alptekin Küpçü. "A containerized proof-of-concept implementation of lightchain system." In 2020 IEEE International Conference on Blockchain and Cryptocurrency (ICBC), pp. 1-2. IEEE, 2020. (PDF)
  • Hassanzadeh-Nazarabadi, Yahya, Alptekin Küpçü, and Öznur Özkasap. "Lightchain: A dht-based blockchain for resource constrained environments." arXiv preprint arXiv:1904.00375 (2019). (PDF)

Citation

For citing this implementation in a publication please use: Hassanzadeh-Nazarabadi, Yahya, Alptekin Küpçü, and Öznur Özkasap. "LightChain: Scalable DHT-Based Blockchain." IEEE Transactions on Parallel and Distributed Systems 32.10 (2021): 2582-2593.

@article{hassanzadeh2021lightchain,
  title={LightChain: Scalable DHT-Based Blockchain},
  author={Hassanzadeh-Nazarabadi, Yahya and K{\"u}p{\c{c}}{\"u}, Alptekin and {\"O}zkasap, {\"O}znur},
  journal={IEEE Transactions on Parallel and Distributed Systems},
  volume={32},
  number={10},
  pages={2582--2593},
  year={2021},
  publisher={IEEE}
}