azamsharp

class Block {

  constructor() {

    this.index = 0
    this.previousHash = ""
    this.hash = ""
    this.nonce = 0
    this.transactions = []

azamsharp

class Blockchain {

   constructor(genesisBlock) {

     this.blocks = []
    
   }
}

azamsharp

addTransaction(transaction) {
    this.transactions.push(transaction)
  }

azamsharp

  get key() {
    return JSON.stringify(this.transactions) + this.index + this.previousHash + this.nonce
  }

azamsharp

let Block = require('./block')
let sha256 = require('js-sha256')

class Blockchain {

   constructor(genesisBlock) {

     this.blocks = []
     this.addBlock(genesisBlock)

azamsharp

let Block = require('./models/block')
let Transaction = require('./models/transaction')
let Blockchain = require('./models/blockchain')

// create genesis block
let genesisBlock = new Block()
let blockchain = new Blockchain(genesisBlock)

// create a transaction

azamsharp

 private func registerGestureRecognizers() {
        
        let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(tapped))
        self.sceneView.addGestureRecognizer(tapGestureRecognizer)
    }

azamsharp

  @objc func tapped(recognizer :UIGestureRecognizer) {
        
        guard let currentFrame = self.sceneView.session.currentFrame else {
            return
        }
        
        let videoNode = SKVideoNode(fileNamed: "big_buck_bunny.mp4")
        videoNode.play()
        
        let skScene = SKScene(size: CGSize(width: 640, height: 480))

azamsharp

let addFloodButton = UIButton(frame: CGRect.zero)
        addFloodButton.setImage(UIImage(named: "plus-image"), for: .normal)

        addFloodButton.addTarget(self, action: #selector(addFloodAnnotation), for: .touchUpInside)

        addFloodButton.translatesAutoresizingMaskIntoConstraints = false
        
        self.view.addSubview(addFloodButton)
        
        addFloodButton.centerXAnchor.constraint(equalTo: self.view.centerXAnchor).isActive = true

azamsharp

import Foundation
import UIKit

extension UIButton {
    
    static func buttonForAddingAnnotation() -> UIButton {
        
        let addFloodButton = UIButton(frame: CGRect.zero)
        addFloodButton.translatesAutoresizingMaskIntoConstraints = false
        addFloodButton.setImage(UIImage(named: "plus-image"), for: .normal)