// SPDX-License-Identifier: MIT
pragma solidity 0.8.10;
import "./BEBase.sol";

// this contract will transfer ownership to BETimelockController after deployed
// all onlyowner method would add timelock
contract BEMysteryBox is BEBase {
  constructor() ERC721("CRYPTO ELITE'S MYSTERY BOXES", "BOX") {}

  function userTokens(
    address user,
    uint256 start,
    uint256 page
  ) external view returns (uint256[] memory) {
    uint256 size = balanceOf(user);
    uint256[] memory results = new uint256[](page);
    if (start < size) {
      uint256 max = size;
      if (start + page < size) {
        max = start + page;
      }
      for (uint256 i = start; i < max; ++i) {
        uint256 tokenId = tokenOfOwnerByIndex(user, i);
        results[i - start] = tokenId;
      }
    }
    return results;
  }
}