How to: ERC-1155 ID Substitution for Token URI

Support Contracts
16

Great idea and it works not only in theory :slight_smile: So no more reasons to have centralized NFTs :slight_smile:

The URI function needs to be overwritten like this:

    import "@openzeppelin/contracts/utils/Strings.sol"
    
    function uri(uint256 _tokenID) override public view returns (string memory) {
    
       string memory hexstringtokenID;
         hexstringtokenID = uint2hexstr(_tokenID);
    
    return string(
        abi.encodePacked(
        "ipfs://f0",
        hexstringtokenID)
        );
    }

Here is an [example](https://soenkeba.medium.com/truly-decentralized-nfts-by-erc-1155-b9be28db2aae).