Transactions

.swift

class Transaction :Codable {
    
    var from :String
    var to :String
    var amount :Double
    
    init(from :String, to :String, amount :Double) {
        self.from = from
        self.to = to
        self.amount = amount
    }
    
    init?(request :Request) {
        
        guard let from = request.data["from"]?.string,
              let to = request.data["to"]?.string,
              let amount = request.data["amount"]?.double
            else {
                return nil
        }
        
        self.from = from
        self.to = to
        self.amount = amount
    }
}