old_provider = restream.provider
new_provider = ProviderType1.new old_provider.params_hash
if new_provider.initialize_event == ProviderType1.SUCCESS_CODE
  # use buy-bug to check if #initialize_event was successful
  new_provider.save
  # check if new_provider can be persisted or have validation errors with "puts new_provider.errors"
  old_provider.destroy
  # restream should have nullified its provider automatically after it was destroyed. check here
  restream.provider = new_provider
  restream.save
  # check if restream.provider is the new_provider
end

# If you manage to get the right provider after this, there's a chance you're investigating the wrong restream on your worker. Are you sure it's always supposed to be `channel.restreams.last` ?