How to bulk list ERC 1155 NFTs on Opensea?

I'm a beginner here.

I'm using below code to bulk mint NFTs and upload the collection in Opensea.

How do I bulk list the price and royalty % for these NFTs?

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract NFTContract is ERC1155, Ownable {
    using SafeMath for uint256;

    constructor() ERC1155("ipfs://myidgoeshere/{id}.json"){

        for(uint i= 1; i<10000; i++){
            _mint(msg.sender, i, 1, "");
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Have you found the solution?