Merge pull request #64 from blockscout/rr-empty-blocks-sanitizer-head-offset

Add INDEXER_EMPTY_BLOCKS_SANITIZER_HEAD_OFFSET env

Author: vbaranov

setup/env-variables/backend-env-variables.mdx

@@ -214,6 +214,7 @@ Can be set in format `1h` for 1 hour, `1m` for 1 minute, `1s` or `1` for 1 secon
 | `INDEXER_DB_EVENT_NOTIFICATIONS_CLEANUP_MAX_AGE`                       | Max age of DB event notifications before they are cleaned up. [Time format](backend-env-variables.md#time-format). Implemented in [#12738](https://github.com/blockscout/blockscout/pull/12738)                                                                                                                                                                                                                                                                                                                                           | Version: v9.0.0\+ <br />Default: `5m` <br />Applications: Indexer                                          |
 | `INDEXER_EMPTY_BLOCKS_SANITIZER_BATCH_SIZE`                   | Batch size for empty block sanitizer (re-fetcher). Default value changed from 100 to 10 in the release `v6.10.1` ([#11555](https://github.com/blockscout/blockscout/pull/11555))                                                                                                                                                                                                                                                                                                                                                 | Version: v4.1.3\+ <br />Default: `10` <br />Applications: Indexer                                         |
 | `INDEXER_EMPTY_BLOCKS_SANITIZER_INTERVAL`                     | Interval for empty block sanitizer. Implemented in [#8658](https://github.com/blockscout/blockscout/pull/8658)                                                                                                                                                                                                                                                                                                                                                                                                                   | Version: v5.3.0\+ <br />Default: `5m` <br />Applications: Indexer                                         |
+| `INDEXER_EMPTY_BLOCKS_SANITIZER_HEAD_OFFSET`                  | Minimal age for block to be processed by empty block sanitizer. Implemented in [#13132](https://github.com/blockscout/blockscout/pull/13132)                                                                                                                                                                                                                                                                                                                                                                                     | Version: master\+ <br />Default: `1000` <br />Applications: Indexer                                      |
 | `INDEXER_FETCHER_INIT_QUERY_LIMIT`                            | Limit for all fetchers init queries. Implemented in [#7697](https://github.com/blockscout/blockscout/pull/7697).                                                                                                                                                                                                                                                                                                                                                                                                                 | Version: v5.2.0\+ <br />Default: `100` <br />Applications: Indexer                                        |
 | `INDEXER_GRACEFUL_SHUTDOWN_PERIOD`                            | Time that will be given to the block fetchers when stopping the application before they are killed. Implemented in [#9729](https://github.com/blockscout/blockscout/pull/9729)                                                                                                                                                                                                                                                                                                                                                   | Version: v6.5.0\+ <br />Default: `5m` <br />Applications: Indexer                                         |
 | `INDEXER_HIDE_INDEXING_PROGRESS_ALERT`                        | If `true`, indexer progress alert will be disabled even if initial catchup indexing is still in place. Implemented in [#7360](https://github.com/blockscout/blockscout/pull/7360).                                                                                                                                                                                                                                                                                                                                               | Version: v5.1.5\+ <br />Default: `false` <br />Applications: API                                          |