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NFT

npm install

合约说明

这个合约主要用于bybit铸造NFT,管理员通过safeTransferFrom方法来铸造NFT并转移给NFT所有者:

1. 由admin指定id铸造
2. 如果是admin地址发起,则会mint nft if token not exist
3. 如果是其他地址(非admin)发起,则按照正常的流程进行转账(检查是否owner或被授权)
function:
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory data
    ) public virtual override {
        _mintIfNotExist(tokenId);
        require(_isApprovedOrOwner(_msgSender(), tokenId), "NFT: caller is not token owner or approved");
        _safeTransfer(from, to, tokenId, data);
    }

    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        _mintIfNotExist(tokenId);
        require(_isApprovedOrOwner(_msgSender(), tokenId), "NFT: caller is not token owner or approved");
        _transfer(from, to, tokenId);
    }

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