ShahirZain

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
import 'https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol';
import 'https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/math/SafeMath.sol';

contract Allowance is Ownable {
    using SafeMath for uint;
    mapping(address => uint) public allowance;
    event AllowanceChange(address indexed _forWho , address indexed _fromWhom , uint _oldAmount , uint newAmount);
    modifier ownerOrAllowed (uint _amount){

ShahirZain

export const getQueryParams = queryParams => {
  const urlParams = new URLSearchParams(queryParams);
  return Array.from(urlParams.entries()).reduce((acc, [key, value]) => {
    acc[key] = value;
    return acc;
  }, {});
};