contract TransferProxy {

    event operatorChanged(address indexed from, address indexed to);
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);


    address public owner;
    address public operator;

    constructor() {
        owner = msg.sender;
    }

    /**
     * @dev Throws if called by any account other than the owner.
    */    

    modifier onlyOwner() {
        require(owner == msg.sender, "Ownable: caller is not the owner");
        _;
    }

    modifier onlyOperator() {
        require(operator == msg.sender, "OperatorRole: caller does not have the Operator role");
        _;
    }

        /** change the OperatorRole from contract creator address to trade contractaddress
            @param _operator :trade address 
        */

    function changeOperator(address _operator) external onlyOwner returns(bool) {
        require(_operator != address(0), "Operator: new operator is the zero address");
        operator = _operator;
        emit operatorChanged(address(0),operator);
        return true;
    }

        /** change the Ownership from current owner to newOwner address
        @param newOwner : newOwner address */

    function ownerTransfership(address newOwner) external onlyOwner returns(bool){
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        owner = newOwner;
        emit OwnershipTransferred(owner, newOwner);
        return true;
    }

    function erc721safeTransferFrom(IERC721 token, address from, address to, uint256 tokenId) external onlyOperator {
        token.safeTransferFrom(from, to, tokenId);
    }

    function erc1155safeTransferFrom(IERC1155 token, address from, address to, uint256 tokenId, uint256 value, bytes calldata data) external onlyOperator {
        token.safeTransferFrom(from, to, tokenId, value, data);
    }

    function erc20safeTransferFrom(IERC20 token, address from, address to, uint256 value) external onlyOperator {
        require(token.transferFrom(from, to, value), "failure while transferring");
    }    
}
function changeOperator(address _operator) external onlyOwner returns(bool) {
        require(_operator != address(0), "Operator: new operator is the zero address");
        operator = _operator;
        emit operatorChanged(address(0),operator);
        return true;
    }
/** change the OperatorRole from contract creator address to trade contractaddress
 @param _operator :trade address 
 */