CB Chain

A blockchain built from scratch for learning.

Nmap service

Highlevel service which maintains the list of active nodes in the blockchain network. It unregisters nodes within 60s of no heartbeat.

node nmap.js

Genesis block and miner ( only once for the network )

NODE_ID=3000 DB_PATH=./db node app.js createWallet
# Creates keys => pubkey 0400ea77060547eb078aed59c2e120b94ccf3a01b837e69d0244838c9d9991606c027d2a59121b8b0f4a1c659e60cbedd4055f779d2bfe975d59bb02973f6bad2f [GENESIS_MINER]
# Create Genesis block ( run only once )
NODE_ID=3000 DB_PATH=./db BLOCKCHAIN_MINER=[GENESIS_MINER] node app.js initChain --minerAddress [GENESIS_MINER]
# Begin mining
NODE_ID=3000 DB_PATH=./db BLOCKCHAIN_MINER=[GENESIS_MINER] node miner.js

Create other miners ()

NODE_ID=3001 DB_PATH=./db node app.js createWallet [ MINER_1=>result of create wallet ]
NODE_ID=3001 DB_PATH=./db BLOCKCHAIN_MINER=[MINER_1] node miner.js

Move money

NODE_ID=3000 DB_PATH=./db BLOCKCHAIN_MINER=[GENESIS_MINER] node app.js add --from [BLOCKCHAIN_MINER] --to [MINER_1] --amount 0.01
NODE_ID=3000 DB_PATH=./db BLOCKCHAIN_MINER=[GENESIS_MINER] node app.js checkBalance --address [BLOCKCHAIN_MINER]
NODE_ID=3001 DB_PATH=./db BLOCKCHAIN_MINER=[MINER_1] node app.js checkBalance --address [MINER_1]

Logging

We are using logem, codebrahma's own Opinionated logger based on top of winston with Papertrail integration. To see debug logs you may start any command with LOG_LEVEL as debug

LOG_LEVEL=debug npm run nmap