Enable early realtime mode when config contains bigmap indexes with skip_history (#655)

Author: droserasprout

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog], and this project adheres to [Semantic Versioning].
 
+## [Unreleased]
+
+### Fixes
+
+- config: Enable early realtime mode when config contains bigmap indexes with `skip_history`.
+
 ## [6.5.4] - 2022-03-31
 
 ### Fixed

src/dipdup/config.py

@@ -1692,6 +1692,13 @@ def _validate(self) -> None:
                     f'`{name}`: `buffer_size` option is incompatible with `advanced.rollback_depth`'
                 )
 
+        # NOTE: Bigmap indexes with `skip_history` require early realtime
+        for name, index_config in self.indexes.items():
+            if isinstance(index_config, BigMapIndexConfig) and index_config.skip_history != SkipHistory.never:
+                _logger.warning('`%s` index is configured to skip history; enabling early realtime', name)
+                self.advanced.early_realtime = True
+                break
+
     def _resolve_template(self, template_config: IndexTemplateConfig) -> None:
         _logger.debug('Resolving index config `%s` from template `%s`', template_config.name, template_config.template)