GenArt721Core.sol

pragma solidity ^0.5.0;


function totalSupply() public view returns (uint256) {
    return _allTokens.length;
}

function tokenByIndex(uint256 index) public view returns (uint256) {
    require(index < totalSupply(), "ERC721Enumerable: global index out of bounds");
    return _allTokens[index];
}

function tokenOfOwnerByIndex(address owner, uint256 index) public view returns (uint256) {
    require(index < balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
    return _ownedTokens[owner][index];
}