Verifying NFT Contract on GoChain that is Created Using Remix.Ethereum.Org

[gobullsclub]

Hello Guys @treeder @r-gochain ,how do i verify a NFT Contract On GoChain?What should i use for the Contract Code ? AbiCode ,Bytecode or The Transact Data from Remix.Ethereum.Org ?.I Fill up all the Details ,but got an error. What should i choose for the EVM option?Default?I'm using the current/latest settings on Remix.Ethereum.Org

[r-gochain]

@gobullsclub could you share the code of the contract?

[r-gochain]

code means = source code, not the compiled binary

[gobullsclub]

//SPDX-License-Identifier: MIT

pragma solidity ^0.8.7;

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

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

string public baseURI;
string public baseExtension = ".json";
uint256 public cost = 0.05 ether;
uint256 public presaleCost = 0.03 ether;
uint256 public maxSupply = 1024;
uint256 public maxMintAmount = 1023;
bool public paused = false;
mapping(address => bool) public whitelisted;
mapping(address => bool) public presaleWallets;

constructor(
    string memory _name,
    string memory _symbol,
    string memory _initBaseURI
) ERC721(_name, _symbol) {
    setBaseURI(_initBaseURI);
    mint(msg.sender, 2);
}

// 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) {
            if (presaleWallets[msg.sender] != true) {
                //general public
                require(msg.value >= cost * _mintAmount);
            } else {
                //presale
                require(msg.value >= presaleCost * _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 setPresaleCost(uint256 _newCost) public onlyOwner {
    presaleCost = _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 addPresaleUser(address _user) public onlyOwner {
    presaleWallets[_user] = true;
}

function add100PresaleUsers(address[100] memory _users) public onlyOwner {
    for (uint256 i = 0; i < 2; i++) {
        presaleWallets[_users[i]] = true;
    }
}

function removePresaleUser(address _user) public onlyOwner {
    presaleWallets[_user] = false;
}

function withdraw() public payable onlyOwner {
    (bool success, ) = payable(msg.sender).call{
        value: address(this).balance
    }("");
    require(success);
}

}

[gobullsclub]

i think the problem is its a Multipart Files ?the NFT contract is not a single file..multipartfiles ,BTW What EVM should is choose?

[gobullsclub]

code means = source code, not the compiled binary

Yes ,i used the Code .But Didnt Work,The Screenshot above is just trying. Please Advice .

[r-gochain]

@gobullsclub please use flattened contract Web3 command line tool could generate it - https://github.com/gochain/web3 (also it could upload and verify as well)

[gobullsclub]

Are you saying i can't Verify a MutilPart NFT Contract? and the contract must be flattened using CLI ..can't use Remix IDE?Because i prefer to use Remix IDE ,easy work..just a plugin

[r-gochain]

You cannot verify multipart contract because we cannot build it without having all files of the contract, please download all files of your contract and upload/verify using web3 tool

[treeder]

Does Remix have a way of verifying? Or exporting the contract to verify?

[gobullsclub]

Okay I'll update soon..After Trying Out The Remix Flattened Contract Method.

On Thu, Feb 24, 2022, 02:18 r-gochain @.***> wrote:

You cannot verify multipart contract because we cannot build it without having all files of the contract, please download all files of your contract and upload/verify using web3 tool

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[gobullsclub]

Not sure,I'll check and update here soon,thanks guys!

On Thu, Feb 24, 2022, 04:16 Travis Reeder @.***> wrote:

Does Remix have a way of verifying? Or exporting the contract to verify?

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[gobullsclub]

Collaborator

What EVM should is choose?

[treeder]

petersburg I believe

[gobullsclub]

Okay thanks Travis for the input , will try very soon!

On Thu, Feb 24, 2022, 11:34 PM Travis Reeder @.***> wrote:

petersburg I believe

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[r-gochain]

@gobullsclub there is a list of EMVs and compile versions (you should use that as on remix)

[r-gochain]

make sure that compiler version and EVM version are the same

[gobullsclub]

I've Tried With All the Information Given above : Same Error as Above

Contract Name = GoBulls or Gobulls_flat (Both Tried) Compiler : 0.87 EVM Version:Petersburg Optimization: Checked

GoBulls_flat.zip

[gobullsclub]

Hello Guys ,@treeder @r-gochain Any Suggestion Or there is something wrong i did?

[r-gochain]

@gobullsclub could you put your contract into a gist and I'll try to build it. Btw I still insist you should build/deploy/verify with web3 command line tool, because we use the same approach on the server side (vanila solc from docker container)

[r-gochain]

oh I've just notices the source code, let me play with it

[gobullsclub]

Okay, I'll try again with gist and I'm gonna learn the CLI method of deploying smart contract, I've already install the CLI on my Windows Machine!

[treeder]

@gobullsclub @r-gochain found an issue with more recent solidity, so I think once the fix is rolled out, you can try again and we'll see if it works.

[gobullsclub]

Noted, thanks Travis!

On Tue, Mar 1, 2022, 7:59 PM Travis Reeder @.***> wrote:

@gobullsclub https://github.com/gobullsclub @r-gochain https://github.com/r-gochain found an issue with more recent solidity, so I think once the fix is rolled out, you can try again and we'll see if it works.

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[r-gochain]

@gobullsclub please use the following approach: 1) In GoBulls_flat.sol remove unnecessary pragma solidity lines and add one in the beginning - pragma solidity ^0.8.7;

2) Build/Deploy/Verify using the following command:

WEB3_PRIVATE_KEY=0x4e6
web3 contract build GoBulls_flat.sol && web3 --network testnet contract deploy --verify GoBulls_flat.sol GoBulls.bin