Update ride generating balance during Ride script executing after Lig…

…ht Node activation.

pkg/ride/diff_state.go

@@ -103,7 +103,7 @@ func (db *diffBalance) effectiveBalance() (int64, error) {
 	return v2, nil
 }
 
-func (db *diffBalance) toFullWavesBalance() (*proto.FullWavesBalance, error) {
+func (db *diffBalance) toFullWavesBalance(lightNodeActivated bool) (*proto.FullWavesBalance, error) {
 	eff, err := db.effectiveBalance()
 	if err != nil {
 		return nil, err
@@ -118,9 +118,13 @@ func (db *diffBalance) toFullWavesBalance() (*proto.FullWavesBalance, error) {
 	if spb < 0 {
 		return nil, errors.New("negative spendable balance")
 	}
-	gen := eff
-	if db.stateGenerating < gen {
-		gen = db.stateGenerating
+	// According to the scala node implementation:
+	//  Before Light Node activation generating balance doesn't change during the script execution.
+	//  Update generating balance if it's greater than effective balance, i.e. update generating balance during
+	// 	script processing.
+	gen := db.stateGenerating
+	if lightNodeActivated && eff < gen {
+		gen = eff
 	}
 	return &proto.FullWavesBalance{
 		Regular:    uint64(db.balance),

pkg/ride/environment.go

@@ -28,6 +28,7 @@ type WrappedState struct {
 	dataEntriesSize           int
 	rootScriptLibVersion      ast.LibraryVersion
 	rootActionsCountValidator proto.ActionsCountValidator
+	isLightNodeActivated      bool
 }
 
 func newWrappedState(
@@ -42,6 +43,7 @@ func newWrappedState(
 		height:                    proto.Height(env.height()),
 		rootScriptLibVersion:      rootScriptLibVersion,
 		rootActionsCountValidator: proto.NewScriptActionsCountValidator(),
+		isLightNodeActivated:      env.lightNodeActivated(),
 	}
 }
 
@@ -157,7 +159,7 @@ func (ws *WrappedState) NewestFullWavesBalance(account proto.Recipient) (*proto.
 	if err != nil {
 		return nil, err
 	}
-	return b.toFullWavesBalance()
+	return b.toFullWavesBalance(ws.isLightNodeActivated)
 }
 
 func (ws *WrappedState) IsStateUntouched(account proto.Recipient) (bool, error) {