anarkrypto / p2pow

A P2P Delegated Proof of Work solution for Nano cryptocurrency

Nano P2PoW

A P2P Delegated Proof of Work solution for Nano cryptocurrency

Trustless, serverless, open-source

Introduction

This project has the ability to make Nano instantaneous for any type of low computing device by delegating PoW to Workers on a P2P network, requiring no central servers / coordinators.

P2PoW is the rebranding of Delegated PoW, created by me, Anarkrypto, in October 2019 and winner of NanoJam - first hackaton involving the Nano cryptocurrency.

P2PoW rewards "workers nodes" providing computing resources to Nano users in exchange for a small fee. Using Nano's DAG technology, it was possible to create a safe mechanism where neither party can be dishonest. This eliminates any need for central coordinator / authority in the process.

The only way a user can have their transaction validated by Worker is to attach an extra transaction block as a reward after their transactions. The only way for a Worker to receive his reward is by completing PoW and broadcasting the user's transaction first to be able to validate his reward block. Read more in this Medium article

P2PoW Resources

P2PoW API:

worker API is a node-like software that those interested in providing proof of work for users should run.

It register the worker's IP in the tracker account to be found by users.
Then it provides an API that receives proof of work requests, verifies the validity and, if all is well, solves the PoW and broadcast the user_block and reward_block to the network, receiving a reward in return.

• Prog Language: Python
• Current Version: 2.0.0
• Code and instructions: https://github.com/anarkrypto/P2PoW/tree/master/worker_API

P2PoW Client

This client offers the best way to communicate with workers running the P2PoW API and was developed to facilitate the implementation of the P2PoW protocol in apps and websites:

App Intercace <-> Client JS <-> Workers API

All signatures are made on the client side. Block information, account balance and etc are obtained through RPC commands for a Nano node.

Compatible with node.js and major browsers

Proof of work can be requested in a simple way

P2PoW.requestWork(user_block, callback)
  .then(res => {
          console.info("P2PoW successfully! Your Block: " + res.user_block.hash)
  })
  .catch (err => {
          console.error("All workers fail: " + err.fail)
  })

• Prog. Language: Javascript (JS)
• Current Version: 1.0.0
• Code and instructions: https://github.com/anarkrypto/P2PoW/tree/master/client_JS

P2PoW Web Demo

This application runs directly in the browser and contains the main functions of a Nano wallet

It offers a friendly interface allowing any user to test the P2PoW protocol, using online workers to validate their transactions.

The communication process with workers is done by the P2PoW client JS

Try it now, P2PoW online web demo: http://demo.p2pow.online

Preview:

• Prog. Language: Javascript, HTML, CSS
• Current Version: 1.0.0
• Code and instructions: https://github.com/anarkrypto/P2PoW/tree/master/web_demo
• Online Demo: http://demo.p2pow.online

Donations

This project is developed in a totally independent way, you can encourage further development of this and other Nano projects with a donation:

nano_18eoa1k16d4n1b5hb8hwxm5mmgp6zny7owhn8omc5bgxjahxsyznob9u536t

Discord Channel

If you have questions about the project, suggestions or other contributions you can join our channel #p2pow-discussion on The Nano Center's Discord server: https://discord.gg/GhzdTkD

p2pow's Issues

The miner reward block can be reliably forked away using gap transactions

As brought up on Discord, by submitting a reward block replacement ahead of time to nodes, the reward block can be replaced by either a malicious miner or a malicious user. The nodes will use the transaction they got first, even if they didn't have the user block yet.