//
//  Blockchain.swift
//  Blockchain
//
//  Created by Victor BODINAUD on 27/02/2020.
//  Copyright © 2020 Victor BODINAUD. All rights reserved.
//

import Foundation

class Blockchain {
    var chain = [Block]()
    
    func createGenesisBlock(data: String) {
        let genesisBlock = Block()
        genesisBlock.data = data
        genesisBlock.previousHash = "0000"
        genesisBlock.index = 0
        genesisBlock.hash = genesisBlock.generateHash()
        chain.append(genesisBlock)
        print("Genesis block created -- hash: \(genesisBlock.hash ?? "")")
    }
    
    func createBlock(data: String) {
        let newBlock = Block()
        newBlock.data = data
        newBlock.previousHash = chain[chain.count-1].hash
        newBlock.index = chain.count
        newBlock.hash = newBlock.generateHash()
        chain.append(newBlock)
        
        print("Block \(newBlock.index ?? 0) created -- hash: \(newBlock.hash ?? "") previous hash: \(newBlock.previousHash ?? "") data: \(newBlock.data ?? "")")
    }
}