abci/kvstore: return LastBlockHeight and LastBlockAppHash in Info (#4233)

Fixes #4177

CHANGELOG_PENDING.md

@@ -55,6 +55,7 @@ program](https://hackerone.com/tendermint).
     ```
     - ID is unique for each request;
     - Request.ID is now optional. Notification is a Request without an ID. Previously ID="" or ID=0 were considered as notifications.
+
   - [config] \#4046 Rename tag(s) to CompositeKey & places where tag is still present it was renamed to event or events. Find how a compositeKey is constructed [here](https://github.com/tendermint/tendermint/blob/6d05c531f7efef6f0619155cf10ae8557dd7832f/docs/app-dev/indexing-transactions.md)
     - You will have to generate a new config for your Tendermint node(s)
 
@@ -103,6 +104,7 @@ program](https://hackerone.com/tendermint).
 - [cli] [\#4065](https://github.com/tendermint/tendermint/issues/4065) Add `--consensus.create_empty_blocks_interval` flag (@jgimeno)
 - [docs] [\#4065](https://github.com/tendermint/tendermint/issues/4065) Document `--consensus.create_empty_blocks_interval` flag (@jgimeno)
 - [crypto] [\#4190](https://github.com/tendermint/tendermint/pull/4190) Added SR25519 signature scheme
+- [abci] \#4177 kvstore: Return `LastBlockHeight` and `LastBlockAppHash` in `Info` (@princesinha19)
 
 ### BUG FIXES:
 

abci/example/kvstore/kvstore.go

@@ -69,9 +69,11 @@ func NewApplication() *Application {
 
 func (app *Application) Info(req types.RequestInfo) (resInfo types.ResponseInfo) {
 	return types.ResponseInfo{
-		Data:       fmt.Sprintf("{\"size\":%v}", app.state.Size),
-		Version:    version.ABCIVersion,
-		AppVersion: ProtocolVersion.Uint64(),
+		Data:             fmt.Sprintf("{\"size\":%v}", app.state.Size),
+		Version:          version.ABCIVersion,
+		AppVersion:       ProtocolVersion.Uint64(),
+		LastBlockHeight:  app.state.Height,
+		LastBlockAppHash: app.state.AppHash,
 	}
 }