currency-8.x-3.3/currency.plugin_type.yml

currency_amount_formatter:
  label: Amount formatter
  plugin_manager_service_id: plugin.manager.currency.amount_formatter
  plugin_definition_decorator_class: \Drupal\plugin\PluginDefinition\ArrayPluginDefinitionDecorator
  operations_provider_class: \Drupal\currency\Plugin\Currency\AmountFormatter\AmountFormatterOperationsProvider
currency_exchange_rate_provider:
  label: Exchange rate provider
  plugin_manager_service_id: plugin.manager.currency.exchange_rate_provider
  plugin_definition_decorator_class: \Drupal\plugin\PluginDefinition\ArrayPluginDefinitionDecorator
  operations_provider_class: \Drupal\currency\Plugin\Currency\ExchangeRateProvider\ExchangeRateProviderOperationsProvider