Want to build NFTs that actually work across all marketplaces?

Most devs think ERC-721 is just "mint & done", but there's much more.

🧵 on mastering ERC-721 and best practices 👇

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Without this standard, your NFTs would be isolated islands. ERC-721 creates the common language that lets your tokens work seamlessly across:

- OpenSea & other marketplaces
- Wallets (MetaMask, Rabby etc.)
- dApps & games

Core ERC-721 functions every dev must know:

⚠️ transferFrom vs safeTransferFrom 

⚠️transferFrom(): Fast but risky - can send NFTs to contracts that can't handle them = LOST FOREVER 💀

safeTransferFrom(): Checks if recipient can receive NFTs before transferring

Always use safeTransferFrom() unless you know what you're doing! 🛡️

Your contract manages ownership, but metadata gives NFTs their identity & value.
It's a JSON file with:
- Name & description
- Image URL
- Traits/attributes
- External links

Marketplaces use this to display & filter your NFTs! 📱