Problem: new iavl indexes migration is slow and not optional (#714) (#720)

* Problem: new iavl indexes migration is slow and not optional

Closes: #712
Solution:
- Integrate the option introduced in cosmos-sdk

* Update CHANGELOG.md

Signed-off-by: yihuang <huang@crypto.com>

Signed-off-by: yihuang <huang@crypto.com>

Signed-off-by: yihuang <huang@crypto.com>

Author: yihuang

CHANGELOG.md

@@ -8,6 +8,7 @@
 
 ### Improvements
 
+- [cronos#720](https://github.com/crypto-org-chain/cronos/pull/720) Add option `iavl-disable-fastnode` to disable iavl fastnode indexing migration (backport #714).
 - [cronos#721](https://github.com/crypto-org-chain/cronos/pull/721) Integrate the file state streamer (backport #702).
 
 *Sep 20, 2022*

cmd/cronosd/cmd/root.go

@@ -213,9 +213,6 @@ type appCreator struct {
 	encCfg params.EncodingConfig
 }
 
-// missing flag from cosmos-sdk
-const flagIAVLCacheSize = "iavl-cache-size"
-
 // newApp is an AppCreator
 func (a appCreator) newApp(logger log.Logger, db dbm.DB, traceStore io.Writer, appOpts servertypes.AppOptions) servertypes.Application {
 	var cache sdk.MultiStorePersistentCache
@@ -271,7 +268,8 @@ func (a appCreator) newApp(logger log.Logger, db dbm.DB, traceStore io.Writer, a
 		baseapp.SetTrace(cast.ToBool(appOpts.Get(server.FlagTrace))),
 		baseapp.SetIndexEvents(cast.ToStringSlice(appOpts.Get(server.FlagIndexEvents))),
 		baseapp.SetSnapshot(snapshotStore, snapshotOptions),
-		baseapp.SetIAVLCacheSize(cast.ToInt(appOpts.Get(flagIAVLCacheSize))),
+		baseapp.SetIAVLCacheSize(cast.ToInt(appOpts.Get(server.FlagIAVLCacheSize))),
+		baseapp.SetIAVLDisableFastNode(cast.ToBool(appOpts.Get(server.FlagIAVLFastNode))),
 	)
 }