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I am trying to publish my collection of 5,000 NFTs and I'm just about to upload them to Opensea... I just keep receiving the error in the title. I had no problem producing 1, 20, or 50 NFTs of the 5000. But when I changed the number to 5000, for some reason I get this error. Does anyone know what's wrong? Appreciate any feedback :)

pragma solidity >=0.7.0 <0.9.0;

import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract NFT is ERC721Enumerable, Ownable {
  using Strings for uint256;

  string public baseURI;
  string public baseExtension = ".json";
  uint256 public cost = 0.05 ether;
  uint256 public maxSupply = 10000;
  uint256 public maxMintAmount = 5000;
  bool public paused = false;
  mapping(address => bool) public whitelisted;

  constructor(
    string memory _name,
    string memory _symbol,
    string memory _initBaseURI
  ) ERC721(_name, _symbol) {
    setBaseURI(_initBaseURI);
    mint(msg.sender, 5000);
  }

  // internal
  function _baseURI() internal view virtual override returns (string memory) {
    return baseURI;
  }

  // public
  function mint(address _to, uint256 _mintAmount) public payable {
    uint256 supply = totalSupply();
    require(!paused);
    require(_mintAmount > 0);
    require(_mintAmount <= maxMintAmount);
    require(supply + _mintAmount <= maxSupply);

    if (msg.sender != owner()) {
        if(whitelisted[msg.sender] != true) {
          require(msg.value >= cost * _mintAmount);
        }
    }

    for (uint256 i = 1; i <= _mintAmount; i++) {
      _safeMint(_to, supply + i);
    }
  }

  function walletOfOwner(address _owner)
    public
    view
    returns (uint256[] memory)
  {
    uint256 ownerTokenCount = balanceOf(_owner);
    uint256[] memory tokenIds = new uint256[](ownerTokenCount);
    for (uint256 i; i < ownerTokenCount; i++) {
      tokenIds[i] = tokenOfOwnerByIndex(_owner, i);
    }
    return tokenIds;
  }

  function tokenURI(uint256 tokenId)
    public
    view
    virtual
    override
    returns (string memory)
  {
    require(
      _exists(tokenId),
      "ERC721Metadata: URI query for nonexistent token"
    );

    string memory currentBaseURI = _baseURI();
    return bytes(currentBaseURI).length > 0
        ? string(abi.encodePacked(currentBaseURI, tokenId.toString(), baseExtension))
        : "";
  }

  //only owner
  function setCost(uint256 _newCost) public onlyOwner() {
    cost = _newCost;
  }

  function setmaxMintAmount(uint256 _newmaxMintAmount) public onlyOwner() {
    maxMintAmount = _newmaxMintAmount;
  }

  function setBaseURI(string memory _newBaseURI) public onlyOwner {
    baseURI = _newBaseURI;
  }

  function setBaseExtension(string memory _newBaseExtension) public onlyOwner {
    baseExtension = _newBaseExtension;
  }

  function pause(bool _state) public onlyOwner {
    paused = _state;
  }

 function whitelistUser(address _user) public onlyOwner {
    whitelisted[_user] = true;
  }

  function removeWhitelistUser(address _user) public onlyOwner {
    whitelisted[_user] = false;
  }

  function withdraw() public payable onlyOwner {
    (bool success, ) = payable(msg.sender).call{value: address(this).balance}("");
    require(success);
  }
}
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  • i used the same tutorial has you and i have the same issue, i think the tutorial is flawed Commented Apr 13, 2022 at 14:13

1 Answer 1

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my guess would be that you're hitting this require statement require(supply + _mintAmount <= maxSupply);, what are you doing exactly? calling the mint function with your address and 5000 as arguments?
Or are you just trying to deploy the contract? if so you're probably hitting the gas limit

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  • Thanks for the response. Sorry, though, I am new to this all... kinda following a tutorial video. What exactly do you recommend I do so I can get all 5000 uploaded to Opensea? Commented Sep 28, 2021 at 21:43
  • Are you trying to deploy this contract or is it already deployed and you're trying to mint additionnal tokens using the mint function?
    – Foxxxey
    Commented Sep 29, 2021 at 8:27
  • I am trying to deploy it with the 5000 nfts... still learning how to mint additional ones Commented Sep 29, 2021 at 18:13

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