如何使用 Chainlink 的 Automation/Keeper 转移 NFT（checkUpkeep & performUpKeep）答案

【问题标题】：How to Transfer NFTs using Chainlink's Automation/Keeper (checkUpkeep & performUpKeep)如何使用 Chainlink 的 Automation/Keeper 转移 NFT（checkUpkeep & performUpKeep）
【发布时间】：2022-11-12 00:08:11
【问题描述】：

我正在处理 NFT 拍卖合同。我正在努力实现 1. NFT 转让给最高出价者。 2. 最高出价者对上一个 NFT 所有者或拍卖创建者的出价。 3. 发送给合约所有者的小平台切割。

当我手动做事时，所有这些工作都很顺利。但是当我尝试使用链环自动化来实现这一点时，它失败了。

据我了解，由于allowance 问题，它失败了。我的问题是，是否有可能使用链环自动化来实现这一目标？如果是，那么如何？

当 NFT 所有者列出他的 NFT 进行拍卖时，他正在向合约地址提供 NFT 转账津贴。

    function checkUpkeep(bytes calldata /* checkData */) external view override returns(bool upkeepNeeded, bytes memory performData) {
        for(uint i=0; i < auctionIDs.length; i++){
            if(auctions[auctionIDs[i]].endTime != 0 && block.timestamp > auctions[auctionIDs[i]].endTime){
                upkeepNeeded = true;
                performData = abi.encodePacked(uint256(auctionIDs[i]));
            }
        }
        return (upkeepNeeded, performData);
    }

    function performUpkeep(bytes calldata performData) external override nonReentrant {
        uint256 auction_id = abi.decode(performData, (uint256));

        if(auctions[auction_id].endTime != 0 && block.timestamp > auctions[auction_id].endTime){

            auctions[auction_id].listed = false;

            safeTransferFrom(podcastId[auctions[auction_id].podcastId].nftOwner, bidders[auction_id].highestBidder, podcastId[auctions[auction_id].podcastId].tokenId);

            uint256 platformCut = (platformFee * bidders[auction_id].highestBid)/100;
            uint256 NftOwnerCut = bidders[auction_id].highestBid - platformCut;

            (bool pass, ) = platformFeeRecipient.call{value: platformCut}("");
            require(pass, "platformFee Transfer failed");
            (bool success, ) = (podcastId[auctions[auction_id].podcastId].nftOwner).call{value: NftOwnerCut}("");
            require(success, "NftOwnerCut Transfer Failed");

            podcastId[auctions[auction_id].podcastId].nftOwner = bidders[auction_id].highestBidder;
            emit AuctionResulted(auction_id, bidders[auction_id].highestBidder, bidders[auction_id].highestBid);
            bidders[auction_id].highestBid = 0;
            auctions[auction_id].endTime = 0;
            
        }

    }

完整代码/合同：https://mumbai.polygonscan.com/address/0x7e2DA19C130cb3B483FA7f17C45c70716ABF5Fe8

Chainlink upKeep：https://automation.chain.link/mumbai/21891159634677518530356555981285976030474691922841692133624884405593696766700

请帮忙，谢谢。

【问题讨论】：

标签： ethereum solidity nft chainlink chainlink-keepers

【解决方案1】：

我认为问题在于您的 upkeepNeeded 由于拍卖结束时间为 0 而返回 false

 if(auctions[auctionIDs[i]].endTime != 0

【讨论】：