using System;

using Expload.Pravda;

​

[Program]

public class VirusWorld

{

    Mapping<Bytes, int> Balances = new Mapping<Bytes, int>();

    public Mapping<String, String> VirusToOwner = new Mapping<String, Bytes>;

    public Mapping<String, int> VirusToPrice = new Mapping<String, int>();

    public Mapping<String, int> RenterToVirus = new Mapping<Bytes, int>();

    public int BalanceOf(Bytes tokenOwner)

    {

        return Balances.getDefault(tokenOwner, 0);

    }

    public void Transfer(String VirusHash, int tokens)

    {

        if (tokens > VirusToPrice.getDefault(VirusHash,0)) {

            if (Balances.getDefault(Info.Sender(), 0) >= tokens) {

                Balances.put(Info.Sender(), Balances.getDefault(Info.Sender(), 0) - tokens);

                Balances.put(VirusToOwner.getDefault(VirusHash,0), Balances.getDefault(VirusToOwner.getDefault(VirusHash,0), 0) + tokens);

            }

        }

    }

    public void NewVirus(String VirusHash, int Price)

    {

        HashToOwner.put(VirusHash, Info.Sender());

        VirusToPrice.put(VirusHash, Price);

    }

    public void Rent (String VirusHash, int Price)

    {

        HashToOwner.put(VirusHash, Info.Sender());

        VirusToPrice.put(VirusHash, Price);

    }

    public void Emit(Bytes owner, int tokens)

    {

        if (tokens > 0) {

            Balances.put(owner, Balances.getDefault(owner, 0) + tokens);

        }

    }

    public static void Main() {}

}

​