智能合约NFT如何通过代码将价格添加到集合中的整个项目

Question

问候，

你能告诉我如何为OpenSea托管的收藏中的每一件物品增加价格吗？

所以，我有工作代码，它创建了：

1.集合名称(来自部署前的构造(

2.NFT符号(来自部署前的构造(

3.ipfs的URI(从部署前的构造，例如：ipfs://QmQtP8RNjvcVtKqcPwukgckWF74ojBjzahVzE3qCCnqv4f/

我的智能合约示例：

// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0 <0.9.0;
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
contract NFT is ERC721Enumerable, Ownable {
using Strings for uint256;
string public baseURI;
string public baseExtension = ".json";
uint256 public cost = 10000000000000000;
uint256 public maxSupply = 10000;
uint256 public maxMintAmount = 100;
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, 5); // 5- for test
}
// 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 getCost() public view returns (uint256) {
return cost;
}
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 onlyOwner {
uint256 balance = address(this).balance;
payable(msg.sender).transfer(balance);
}
}

以及我的项目json文件示例：

{
"description": "Test Description",
"external_url": "http://testurl.com",
"image": "ipfs://QmSrkLg3UR5AUthhCZfrK9nrX3fxJJ4aCJK7B99rUkCa72/4.png",
"name": "Test Name #4",
"symbol": "TNFT",
"collection": {
"name": "TestNFT123_321",
"family": ""
},
"date": 1643919095,
"attributes": {
"Story": "In Caffe",
"Company": "Test Company",
"Some": "thing else"
}
}

在OpenSea上，我创建了带有项目的集合名称，但带有活动价格按钮。我做错了什么？

谢谢你的帮助。

Answer 1

我调查了这个问题，所以：

1. 在OpenSea上列出的项目可以是API端点(请参阅OpenSea文档和此处(
2. OpenSea列表可能只在主网或Rinkeby网络上(截至目前，没有Polygon、BSC…(
3. 有很多点击器，它们模仿在Polygon网络上添加项目、名称、价格

正在等待API V2 OpenSea=((