- [ ] If I added new functionality, I added tests covering it.
- [ ] If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.
- [ ] I checked whether I should update the docs and did so if necessary
- [ ] If I added/changed/removed ENV var, I should update the list of env vars in https://github.com/poanetwork/blockscout/blob/master/docs/env-variables.md to reflect changes in the table here https://poanetwork.github.io/blockscout/#/env-variables?id=blockscout-env-variables
| `BLOCK_TRANSFORMER` | | Transformer for blocks: base or clique. | base | v1.3.4+ |
| `GRAPHIQL _TRANSACTION` | | Default transaction in query to GraphiQL. | (empty) | v1.3.4+ |
| `FIRST_BLOCK` | | The block number, where indexing begins from. | 0 | v1.3.8+ |
| `LAST_BLOCK` | | The block number, where indexing stops. | (empty) | master |
| `TXS_COUNT_CACHE_PERIOD` | | Interval in seconds to restart the task, which calculates the total txs count. | 60 * 60 * 2 | v1.3.9+ |
| `ADDRESS_WITH_BALANCES`<br/>`_UPDATE_INTERVAL`| | Interval in seconds to restart the task, which calculates addresses with balances. | 30 * 60 | v1.3.9+ |
| `LINK_TO_OTHER_EXPLORERS` | | true/false. If true, links to other explorers are added in the footer | (empty) | v1.3.0+ |