from ..constants import NFT_API_ENDPOINTS

def _nft_approvals(approved_after: int or str='1970-01-01T00:00:00',
                   approved_before: int or str='2050-01-01T00:00:00',
                   order: str='asc',
                   limit: int=10) -> str:
        
    base_url = '{}?approved_after={}&approved_before={}&order={}&limit={}'.format(NFT_API_ENDPOINTS['nft_approvals'], approved_after, approved_before, order, limit)
    
    return base_url