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Private NFT media

This public wiki is the progressive guide to Fairmint's ERC-8291: SIWE-Gated NFT Media URI (Draft) for ERC-721 and ERC-1155 tokens.

Draft: ERC-8291 is not an adopted Ethereum standard or production-grade private storage. Follow PR #1801 and the Magicians discussion.

Read by depth

1. Protocol overview explains the five-step flow and its boundaries.
2. Implementer guide maps each responsibility to the public source and tests.
3. Security and production separates protocol requirements from demo shortcuts.
4. Demo explains what the reference application proves.
5. The official ERC-8291 draft (open PR #1801) defines the exact requirements.

The public metadata URI is a discovery pointer, not a secret. Authorization comes from a fresh, exact-resource SIWE proof and a current token authorization check.

Public discussion lives on Ethereum Magicians.