Info queries the param store

baseapp/abci.go

@@ -125,7 +125,15 @@ func (app *BaseApp) SetOption(req abci.RequestSetOption) (res abci.ResponseSetOp
 // Info implements the ABCI interface.
 func (app *BaseApp) Info(req abci.RequestInfo) abci.ResponseInfo {
 	lastCommitID := app.cms.LastCommitID()
-
+	// load the app version for a non zero height
+	if lastCommitID.Version > 0 {
+		ctx, err := app.createQueryContext(lastCommitID.Version, false)
+		if err != nil {
+			panic(err)
+		}
+		// get and set the app version
+		_ = app.AppVersion(ctx)
+	}	
 	return abci.ResponseInfo{
 		Data:             app.name,
 		Version:          app.version,

baseapp/baseapp.go

@@ -203,7 +203,14 @@ func (app *BaseApp) Name() string {
 }
 
 // AppVersion returns the application's protocol version.
-func (app *BaseApp) AppVersion() uint64 {
+func (app *BaseApp) AppVersion(ctx sdk.Context) uint64 {
+	if app.appVersion == 0 && app.paramStore.Has(ctx, ParamStoreKeyVersionParams) {
+		var vp tmproto.VersionParams
+
+		app.paramStore.Get(ctx, ParamStoreKeyVersionParams, &vp)
+		// set the app version
+		app.appVersion = vp.AppVersion
+	}
 	return app.appVersion
 }
 

baseapp/baseapp_test.go

@@ -460,7 +460,7 @@ func TestInfo(t *testing.T) {
 	assert.Equal(t, t.Name(), res.GetData())
 	assert.Equal(t, int64(0), res.LastBlockHeight)
 	require.Equal(t, []uint8(nil), res.LastBlockAppHash)
-	require.Equal(t, app.AppVersion(), res.AppVersion)
+	require.EqualValues(t, 0, res.AppVersion)
 	// ----- test a proper response -------
 	// TODO
 }