ERC-721 with OpenZeppelin, Metadata, and Enumeration

This lesson is for enrolled learners

The concept Hand-rolling ERC-721 (previous lesson) teaches the mechanics, but production NFT collections build on OpenZeppelin's ERC721 — an audited base that already handles the tricky parts: safeTransferFrom's onERC721Received check, correct event emission on every state change, and the operator-approval bookkeeping. You import it with import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; and inherit from it directly. Real collections almost always add two extensions. ERC721URIStorage……

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