lesson-notes

Creating Websocket Server

install ws 
create p2p-server.js into app folder
define const Websocket;
define const P2P_PORT 5001
define const peers = inicialize with process.env.PEERS, spliting by comma otherwise assign empty array
define a class P2pServer
- constructor with blockchain parameter
- assign block to the instance variable blockcain
- assign empty array to the sockets variable
- define a method listen for creating Websocker.Server({port: P2P_PORT}) add a event listener 'connection' when fire up should call helper callback function this.connectSocket. In addition add a log with message: 'Listening for peer-to-peer connections on: p2pport
- define connectSocket method whcih receives as parameter a socket and adds it to the sockets array. In addition add log 'Socket connected'

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create a new connectToPeers method which will instance WebSocket object, passing as parameter each peer from sockets array.
--Add an event 'open' listener for each peer, passing the connectSocket method as a callback function
--Export module like module.exports = P2pServer;