libp2p-blockchain

Experimental blockchain based on libp2p.

Peers select random block producer automatically at the end of every minute. Currently finally selected producer is first one among sorted list of proposed peers. In future it can be the most reach peer among proposed, like in PoS. Anyone can change storage and balances. All transaction are free. Bootstrap peer gets all the funds when create new chain. All communication between peers is encrypted with secio. For signing transactions and blocks 2048 bits rsa is used. In future can be replaced with secp256k1. For bls bls-lib is used with FP254BNB curve.

Currently list of peers and state of storage and balances is saved only in memory. In future it can be changed. Also can be added support of EVM.

Run

To run with pregenerated keys just start peers starting from bootstrap peer peer0.

1. npm run peer0

2. npm run peer1

3. npm run peer2

Try json-rpc api

curl -X POST -H 'content-type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"addTransaction","params":{"state":{"storage":{"key":"value"}}}}' localhost:3000

curl -X POST -H 'content-type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"get","params":["state","storage","key"]}' localhost:3001

curl -X POST -H 'content-type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"bls","params":{"message":"hello","numOfPlayers":3,"threshold":2}}' localhost:3000

To generate new keys use util/generate-peer.js then make sure you pass them as arguments to src/start.js.

Demo

https://www.youtube.com/watch?v=g2JcNDu6WJo

How it works

Connecting

1. New nodes connects to known bootstrap node (in future list of peers will be cached and bootstrap node will be required only for first run)

2. Bootstrap node share with new peers list of all currently connected peers

3. New nodes connect to each other

Selecting producer

Creating tx

BLS