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Copy_ScienfactionwithHextoStringsipfsMITExample1ERC1155.sol

pragma solidity ^0.8.0;


import "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";
import  "openzeppelin/contracts/utils/Strings.sol"

contract sciencefaction is ERC1155 {
  
    uint256 public constant NFThistory = 0x01559ae4021a99b0d373d7bc8a80504bad782367abe12c21373c83adc6bf6a7e;
    

  function mint(
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
        
    )  virtual public {

        _mint(to, id, amount, data);
    }

    constructor() public ERC1155("ipfs://f0{id}") {

        _mint(msg.sender, NFThistory, 1, "");
     
    }
    
    
    function uri(uint256 _tokenID) override public view returns (string memory) {
    
       string memory hexstringtokenID;
         hexstringtokenID = uint2hexstr(_tokenID);
    
    return string(
        abi.encodePacked(
        "ipfs://f0",
        hexstringtokenID)
        );
    }
}