class ActiveStorage::Service::S3Service

def upload_with_single_part(key, io, checksum: nil, content_type: nil, content_disposition: nil, custom_metadata: {})
  object_for(key).put(body: io, content_md5: checksum, content_type: content_type, content_disposition: content_disposition, metadata: custom_metadata, **upload_options)
rescue Aws::S3::Errors::BadDigest
  raise ActiveStorage::IntegrityError
end