azamsharp

protocol SmartContract {
    
    func apply(to transaction :Transaction)
}

azamsharp

class MaximumAmountTransferFundsContract : SmartContract {
    
    func apply(to transaction: Transaction) {
        
        if transaction.amount > 5000 {
            transaction.addBrokenRule(BrokenRule(contractName: "MaximumAmountTransferFundsContract", message: "Your amount is more than $5000"))
        }
    }
}

azamsharp

struct BrokenRule : Codable {
    
    var contractName :String
    var message :String
}

class Transaction : Codable  {
    
    var from :String

azamsharp

 func addTransaction(transaction :Transaction, contracts :[SmartContract] = [SmartContract]()) {
        
        // run the smart contracts
        contracts.forEach { contract in
            contract.apply(to: transaction)
        }
        
        if transaction.isValid {
            self.transactions.append(transaction)
        }

azamsharp

class InternationalDomesticTransferFeesContract : SmartContract {
    
    func apply(to transaction: Transaction) {
        
        switch transaction.transactionType {
            case .international:
                transaction.fees = 10
            case .domestic:
                transaction.fees = 2
        }

azamsharp

class Blockchain {
    
    private (set) var blocks :[Block] = [Block]()
    private (set) var contracts :[SmartContract] = [SmartContract]()
    
    init() {
        
        // initialize contracts
        initializeContracts()
    }

azamsharp

//: Playground - noun: a place where people can play

import Cocoa
import Foundation


struct BrokenRule : Codable {
    
    var contractName :String
    var message :String

azamsharp

In this assignment you are going to perform the following SQL scenarioes. Create two tables with the following schema: 

Shopping List 


shopping_list_id: Auto increment , not null, unique, primary key

name: Name of the shopping list. Max (50) 

azamsharp

var express = require('express')
var session = require('express-session')
const mustacheExpress = require('mustache-express')
const bodyParser = require('body-parser')
var app = express()

app.engine('mustache',mustacheExpress())
app.use(bodyParser.urlencoded({extended :true}))

app.set('views','./views')

azamsharp

class Transaction {

  constructor(from,to,amount) {
    this.from = from
    this.to = to
    this.amount = amount
}

}