ccyanxyz

from hashlib import sha224,sha256
import binascii
import re
import os
import base64
import math
import argparse
import sys
import subprocess
import zlib

ccyanxyz

ccyanxyz

pragma solidity ^0.5.0;

import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.5.0/contracts/token/ERC721/ERC721Full.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.5.0/contracts/token/ERC20/ERC20.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.5.0/contracts/math/SafeMath.sol";

contract BlindBox is ERC721Full {
    using SafeMath for uint256;
    
    uint256 issuranceCount;

ccyanxyz

use std::rc::Rc;
use std::cell::RefCell;

type NodePtr<T> = Option<Rc<RefCell<Node<T>>>>;
struct Node<T> {
    val: T,
    next: NodePtr<T>,
}

impl<T> Drop for Node<T> {