feat!: Store eth tx index separately (#1121)

* Store eth tx index separately

Closes: #1075
Solution:
- run a optional indexer service
- adapt the json-rpc to the more efficient query

changelog

changelog

fix lint

fix backward compatibility

fix lint

timeout

better strconv

fix linter

fix package name

add cli command to index old tx

fix for loop

indexer cmd don't have access to local rpc

workaround exceed block gas limit situation

add unit tests for indexer

refactor

polish the indexer module

Update server/config/toml.go

Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>

improve comments

share code between GetTxByEthHash and GetTxByIndex

fix unit test

Update server/indexer.go

Co-authored-by: Freddy Caceres <facs95@gmail.com>

* Apply suggestions from code review

* test enable-indexer in integration test

* fix go lint

* address review suggestions

* fix linter

* address review suggestions

- test indexer in backend unit test
- add comments

* fix build

* fix test

* service name

Co-authored-by: Freddy Caceres <facs95@gmail.com>
Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>

docs/api/proto-docs.md

@@ -82,6 +82,9 @@
 - [ethermint/types/v1/dynamic_fee.proto](#ethermint/types/v1/dynamic_fee.proto)
     - [ExtensionOptionDynamicFeeTx](#ethermint.types.v1.ExtensionOptionDynamicFeeTx)
   
+- [ethermint/types/v1/indexer.proto](#ethermint/types/v1/indexer.proto)
+    - [TxResult](#ethermint.types.v1.TxResult)
+  
 - [ethermint/types/v1/web3.proto](#ethermint/types/v1/web3.proto)
     - [ExtensionOptionsWeb3Tx](#ethermint.types.v1.ExtensionOptionsWeb3Tx)
   
@@ -1168,6 +1171,43 @@ ExtensionOptionDynamicFeeTx is an extension option that specify the maxPrioPrice
 
 
 
+ <!-- end messages -->
+
+ <!-- end enums -->
+
+ <!-- end HasExtensions -->
+
+ <!-- end services -->
+
+
+
+<a name="ethermint/types/v1/indexer.proto"></a>
+<p align="right"><a href="#top">Top</a></p>
+
+## ethermint/types/v1/indexer.proto
+
+
+
+<a name="ethermint.types.v1.TxResult"></a>
+
+### TxResult
+TxResult is the value stored in eth tx indexer
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| `height` | [int64](#int64) |  | the block height |
+| `tx_index` | [uint32](#uint32) |  | cosmos tx index |
+| `msg_index` | [uint32](#uint32) |  | the msg index in a batch tx |
+| `eth_tx_index` | [int32](#int32) |  | eth tx index, the index in the list of valid eth tx in the block, aka. the transaction list returned by eth_getBlock api. |
+| `failed` | [bool](#bool) |  | if the eth tx is failed |
+| `gas_used` | [uint64](#uint64) |  | gas used by tx, if exceeds block gas limit, it's set to gas limit which is what's actually deducted by ante handler. |
+| `cumulative_gas_used` | [uint64](#uint64) |  | the cumulative gas used within current batch tx |
+
+
+
+
+
  <!-- end messages -->
 
  <!-- end enums -->