如何修复“身份不明的合同”？ OpenSea 无法“理解”ERC1155

Question

我已经部署了一个基于ERC-1155的合约（基于OpenZeppelin ）并成功地在这个合约上铸造了一些 NFT。 但是当我想在 OpenSea 中使用这些 NFT 时，它总是说“Unidentified contract” 。

示例： https ://testnets.opensea.io/assets/0xc7d3e4a5A0c3e14ba8C68ea1b8a99a9dBf3ca76F/2

API 示例： https ://testnets-api.opensea.io/api/v1/asset/0xc7d3e4a5A0c3e14ba8C68ea1b8a99a9dBf3ca76F/2/?force_update=true

在他们的官方教程存储库（由于过时的依赖项和其他问题而不再编译）之后，我添加了一些（可能）OpenSea 特定的函数和数据，这些函数和数据可能需要 OpenSea 才能正常工作。 然而，OpenSea 能够获取显示 NFT 所需的所有数据，但只要他们说“Unidentified contract”，到目前为止这一切都没有意义。

我的问题是：

是否有人已经设法部署 ERC-1155 并将其与 OpenSea 一起正确使用而没有此问题？ 有什么我们必须以某种方式“注册”不基于 ERC-721 的合同吗？

🔢 重现代码

import "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";
import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/token/ERC1155/extensions/ERC1155Burnable.sol";

import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/access/Ownable.sol";


contract OwnableDelegateProxy { }

contract ProxyRegistry {
  mapping(address => OwnableDelegateProxy) public proxies;
}


contract MetaCoin is ERC1155, AccessControl, Pausable, ERC1155Burnable {
    bytes32 public constant URI_SETTER_ROLE = keccak256("URI_SETTER_ROLE");
    bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
    bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");

    address proxyRegistryAddress;


    constructor(address _proxyRegistryAddress) ERC1155("https://abcoathup.github.io/SampleERC1155/api/token/{id}.json") {       
        _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
        _setupRole(URI_SETTER_ROLE, msg.sender);
        _setupRole(PAUSER_ROLE, msg.sender);
        _setupRole(MINTER_ROLE, msg.sender);

        proxyRegistryAddress = _proxyRegistryAddress;
    }

    function setURI(string memory newuri) public onlyRole(URI_SETTER_ROLE) {
        _setURI(newuri);
    }

function pause() public onlyRole(PAUSER_ROLE) {
    _pause();
}

function unpause() public onlyRole(PAUSER_ROLE) {
    _unpause();
}

function supportsInterface(bytes4 interfaceId)
    public
    view
    override(ERC1155, AccessControl)
    returns (bool)
{
    return super.supportsInterface(interfaceId);
}

    function mint(address account, uint256 id, uint256 amount, bytes memory data)
        public
        onlyRole(MINTER_ROLE)
    {
        _mint(account, id, amount, data);
    }

    function mintBatch(address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data)
        public
        onlyRole(MINTER_ROLE)
    {
        _mintBatch(to, ids, amounts, data);
    }

    function _beforeTokenTransfer(address operator, address from, address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data)
        internal
        whenNotPaused
        override
    {
        super._beforeTokenTransfer(operator, from, to, ids, amounts, data);
    }

  /**
   * Override isApprovedForAll to whitelist user's OpenSea proxy accounts to enable gas-free listings.
   */
  function isApprovedForAll(
    address _owner,
    address _operator
  ) public override view returns (bool isOperator) {
    // Whitelist OpenSea proxy contract for easy trading.
    ProxyRegistry proxyRegistry = ProxyRegistry(proxyRegistryAddress);
    if (address(proxyRegistry.proxies(_owner)) == _operator) {
      return true;
    }

    return ERC1155.isApprovedForAll(_owner, _operator);
  }


}

💻环境

节点：v16.7.0

部门：

"@openzeppelin/contracts": "^4.3.0",
"@nomiclabs/buidler": "^1.4.8",
"@nomiclabs/hardhat-ethers": "^2.0.2",
"@nomiclabs/hardhat-etherscan": "^2.1.1",
"@nomiclabs/hardhat-waffle": "^2.0.1",
"@openzeppelin/hardhat-upgrades": "^1.9.0",
"@typechain/ethers-v5": "^6.0.5",
"@typechain/hardhat": "^1.0.1",
"@types/chai": "^4.2.15",
"@types/chai-as-promised": "^7.1.3",
"@types/mocha": "^8.2.2",
"@types/node": "^14.14.37",
"chai": "^4.3.3",
"chai-as-promised": "^7.1.1",
"chai-datetime": "^1.8.0",
"ethereum-waffle": "^3.3.0",
"ethers": "^5.4.5",
"hardhat": "^2.6.1",
"hardhat-typechain": "^0.3.5",
"ts-generator": "^0.1.1",
"ts-node": "^9.1.1",
"typechain": "^4.0.3",
"typescript": "^4.2.4"

Answer 1

我终于找到了根本原因！ OpenSea 需要一个名为name的公共属性，以便显示集合的正确名称，而不是静态标签Unidentified contract 。

我在查看他们的参考代码时遇到了这个问题（这取决于现在已经有 3 年历史的MultiToken-Contract 实现，并且需要全部降级 Node 和其他工具才能构建它[降级到 Node 10 工作今天最适合我]）。

Answer 2

这取自您合同中的name 。

对于 ERC-1155 令牌，添加公共变量name

string public name = "My Collection Name";