如何从以太扫描查询密码元数据

Question

我正在尝试从Etherscan查询一个Cryptokitties令牌元数据，我需要给出两个值：_tokenId (uint256)和_preferredTransport (string)。

_preferredTransport的可能价值是什么？

Answer 1

看起来它被废弃了(不再使用了)：

function tokenMetadata(uint256 _tokenId, string _preferredTransport) external view returns (string infoUrl) {
    require(erc721Metadata != address(0));
    bytes32[4] memory buffer;
    uint256 count;
    (buffer, count) = erc721Metadata.getMetadata(_tokenId, _preferredTransport);

    return _toString(buffer, count);
}

function getMetadata(uint256 _tokenId, string) public view returns (bytes32[4] buffer, uint256 count) {
    if (_tokenId == 1) {
        buffer[0] = "Hello World! :D";
        count = 15;
    } else if (_tokenId == 2) {
        buffer[0] = "I would definitely choose a medi";
        buffer[1] = "um length string.";
        count = 49;
    } else if (_tokenId == 3) {
        buffer[0] = "Lorem ipsum dolor sit amet, mi e";
        buffer[1] = "st accumsan dapibus augue lorem,";
        buffer[2] = " tristique vestibulum id, libero";
        buffer[3] = " suscipit varius sapien aliquam.";
        count = 128;
    }
}

如您所见，第二个输入参数没有名称，在那里是为了不使用。