主页EIPs
EIPsERC-5008
ERC-5008

ERC-721 Nonce Extension

Add a `nonce` function to ERC-721.
Last CallStandards Track: ERC
创建时间: 2022-04-10终审截止日期: 2023-08-15
关联 EIP: EIP-165, EIP-721
Anders (@0xanders), Lance (@LanceSnow), Shrug <shrug@emojidao.org>
社区讨论原文链接编辑
1 分钟了解

相关视频
欢迎补充好内容
去提交
正文

Abstract

This standard is an extension of ERC-721. It proposes adding a nonce function to ERC-721 tokens.

Motivation

Some orders of NFT marketplaces have been attacked and the NFTs sold at a lower price than the current market floor price. This can happen when users transfer an NFT to another wallet and, later, back to the original wallet. This reactivates the order, which may list the token at a much lower price than the owner would have intended.

This EIP proposes adding a nonce property to ERC-721 tokens, and the nonce will be changed when a token is transferred. If a nonce is added to an order, the order can be checked to avoid attacks.

Specification

The keywords "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY" and "OPTIONAL" in this document are to be interpreted as described in RFC 2119.

/// @dev the ERC-165 identifier for this interface is 0xce03fdab. interface IERC5008 /* is IERC165 */ { /// @notice Emitted when the `nonce` of an NFT is changed event NonceChanged(uint256 tokenId, uint256 nonce); /// @notice Get the nonce of an NFT /// Throws if `tokenId` is not a valid NFT /// @param tokenId The id of the NFT /// @return The nonce of the NFT function nonce(uint256 tokenId) external view returns(uint256); }

The nonce(uint256 tokenId) function MUST be implemented as view.

The supportsInterface method MUST return true when called with 0xce03fdab.

Rationale

At first transferCount was considered as function name, but there may some case to change the nonce besides transfer, such as important properties changed, then we changed transferCount to nonce.

Backwards Compatibility

This standard is compatible with ERC-721.

Test Cases

Test cases are included in test.js.

Run:

cd ../assets/eip-5008 npm install npm run test

Reference Implementation

See ERC5008.sol.

Security Considerations

No security issues found.

Copyright and related rights waived via CC0.

扩展阅读
欢迎补充好内容
去提交
相关项目
欢迎补充好内容
去提交

不想错过最新的 EIP 动态?

订阅 EIPs Fun 周刊以跟进相关更新,建⽴你与 EIP 之间的连接 ,更好地建设以太坊。

详情
聚集 EIP 贡献者, 扩展以太坊
资源
GitHub
支持社区