ERC721 Non-Fungible Token

.. index:: tokens;ERC721, ERC721, NFT

ERC721 Non-Fungible Token

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.. _erc721:

.. warning::

This is example code for learning purposes. Do not use in production without thorough review and testing.

A standard ERC721 (NFT) implementation with minting and burning.

.. literalinclude:: ../../examples/tokens/ERC721.vy :language: vyper :linenos:

This implementation includes:

• mint and burn functions controlled by a minter address
• safeTransferFrom with receiver callback verification
• Operator approval via setApprovalForAll
• ERC165 interface detection

The safeTransferFrom function checks if the recipient is a contract and, if so, calls onERC721Received to ensure the recipient can handle NFTs.