docs: finishing chain-indexer-overview-for-operators.md

CHANGELOG.md

@@ -1,7 +1,7 @@
 # Lotus changelog
 
 # UNRELEASED
- (`ChainIndexer`) to index Filecoin chain state such as tipsets, messages, events and ETH transactions for accurate and faster RPC responses. The `ChainIndexer` replaces the existing `MsgIndex`, `EthTxIndex` and `EventIndex` implementations in Lotus, which [suffer from a multitude of known problems](https://github.com/filecoin-project/lotus/issues/12293).  If you are an RPC provider/node operator, please refer to the [ChainIndexer documentation for RPC providers](TODO: URL) for information on how to enable, configure and use the new Indexer.
+(`ChainIndexer`) to index Filecoin chain state such as tipsets, messages, events and ETH transactions for accurate and faster RPC responses. The `ChainIndexer` replaces the existing `MsgIndex`, `EthTxHashLookup` and `EventIndex` implementations in Lotus, which [suffer from a multitude of known problems](https://github.com/filecoin-project/lotus/issues/12293).  If you are an RPC provider/node operator, please refer to the [ChainIndexer documentation for RPC providers](TODO: URL) for information on how to enable, configure and use the new Indexer.  While there is no migration and one can upgrade and downgrade without backups, there are manual steps that need to be taken to backfill data for the new Indexer.
 Add `EthGetBlockReceipts` RPC method to retrieve transaction receipts for a specified block. This method allows users to obtain Ethereum format receipts of all transactions included in a given tipset as specified by its Ethereum block equivalent. ([filecoin-project/lotus#12478](https://github.com/filecoin-project/lotus/pull/12478))