Distributed-Ledger

• Motivation: After participating in a blockchain project, I realized blockchain is fundametally a large-scale distributed system which is an area I had never deeply explored before. This insight motivated me to actively seek new knowledge and challenge myself by implementing a distributed ledger system similar to blockchain. Through this project, I aim to expand my skills and deepen my understanding of distributed systems.

• Purpose: To develop an application that simulates blockchain-like functionality using distributed ledger concepts.

• Command:

  • Check Money: Verify the balance of target wallet.
  • Check Log: Review the history transition of target wallet.
  • Transition: Transfer money from one wallet to another.

• System Feature:

  • Implementing multi-threading in each node using Goroutines to increase connection throughput and concurrency.

  • Using Socket TCP to handle long connections among nodes and short conncetions on the client side.

  • Using Kubernetes to manage Docker for stimulating mutiple nodes.

    

• Blockchain Feature:

  • Each node acts as both a data store and an entry point for transactions.
  • Each node follows the principle of eventual consistency when storing transaction information.
  • Every transaction information is stored on all nodes.
  • Clients do not store any transaction information.
  • Clients randomly connect to a node for transaction submission and transaction log retrieval.

• Technique:

  • Programming Language: Golang
  • Network Programming: Socket, TCP
  • DevOps Tools: Docker, Kubernetes(Minikube)

• Demo: https://youtu.be/h7gLIvKN9pk