class ActiveStorage::Service::S3Service

def upload(key, io, checksum: nil, **)
  instrument :upload, key: key, checksum: checksum do
    begin
      object_for(key).put(upload_options.merge(body: io, content_md5: checksum))
    rescue Aws::S3::Errors::BadDigest
      raise ActiveStorage::IntegrityError
    end
  end
end