Different base URIs for different token IDs

Smart Contracts
1

Hello,

in a smart contract based on ERC721, is there a way to have different base URIs for different tokens? It seems to me that this is not possible and not intended, but I would like to be sure.

Best Regards,
Marc

2

Hey George! You can define your own tokenURI function, so you can theoretically make each each tokenId have a different baseURI if you wanted. You could even make them dynamic, but that would be a peculiar use case (for example, returning something depending on block.timestamp).

I think it fell out of fashion, but OZ's ERC721 use to ship with something like this:

    /**
     * @dev Sets `_tokenURI` as the tokenURI of `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
        require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
        _tokenURIs[tokenId] = _tokenURI;
    }

Looks like there is more discussion here.

3

Hello LostArchitect,
thanks for your answer. The link to the other discussion was very helpful!
Cheers,
Marc