imaneelabid/lightx

LighTx

LighTx, a cost-effective and scalable transaction logging system. The system builds on the top of Probabilistic Byzantine Reliable broadcast primitive to concurrently and securely commit transactions without relying on consensus protocols.

A Proof-of-Bandwidth protocol in combination with a reputation system are included for public version of LighTx to make it robust against Sybil attack.

This is a TCP-based version of LighTx.

ProbabilisticBroadcast, ProbabilisticConsistentBroadcast and ProbabilisticSecureBroadcast are the three building blocks of Probabilistic Byzantine Reliable broadcast the underlying mechanism for LighTx.

PoB is a basic method we use to measure bandwidth fluctuations for adversaries (Sybil nodes.)

ReputationScoreSystem is a scoring system that determines the global reputation score for peers of the network by taking into account the opinions of all other peers with whom they interact.

Parameters.

To modify the algorithm parameters edit Converter.java. It includes the network size (nodesNbr​), and the different samples sizes (E_SIZE, R_SIZE, D_SIZE..) and the path to transactions' folder (TX_PATH), the convergence thresholds (EPSILON, E_HAT, R_HAT, D_HAT..) and other parameters.

Transactions file.

Each node have a file of transactions to submit. The application parses the file and broadcasts the transactions concurrently.

The transactions are in the form : <recipient ID : Amount>

The transaction file's name should be named after the transaction's sender ID.

Add transactions folder path to (TX_PATH) in Converter.java

Run.

To run the project launch the main function in Launcher.java