simple-blockchain-network

This repository shows a simple blockchain network implementation. Each instance can be considered a blockchain node. You can use the API endpoints defined in routes.js to interact with the nodes.

Launch a node

Launch a node by running node index.js --port <PORT> (defaults to port 3000)

Example

1. Launch two nodes:

node index.jes --port 3000

node index.jes --port 3001

2. Register node: curl -X POST http://localhost:3000/register --data '{"address":"http://localhost:3001"}'

3. Verify node is registered by retrieving the nodes endpoint: curl http://localhost:3000/nodes and curl http://localhost:3001/nodes should both show the other node as registered.

4. Add a transaction: curl -X POST http://localhost:3000/transaction --data '{"from":"hank","to":"walter","qty":7}'

5. Add another transaction: curl -X POST http://localhost:3000/transaction --data '{"from":"saul","to":"gus","qty":3}'

6. Verify the transactions are added to the transaction pool on both nodes: curl http://localhost:3001/transactions and curl http://localhost:3001/transactions should both show the same unprocessed transactions.

7. Ask either one of the nodes to mine a new block: curl -X POST http://localhost:3000/mine or curl -X POST http://localhost:3001/mine

8. Verify the transaction is added to the chain: curl http://localhost:3000/chain and curl http://localhost:3001/chain