rpc: return amount of consumed GAS in invoke*

pkg/core/blockchain.go

@@ -1382,6 +1382,7 @@ func (bc *Blockchain) GetTestVM() (*vm.VM, storage.Store) {
 	tmpStore := storage.NewMemCachedStore(bc.dao.store)
 	systemInterop := bc.newInteropContext(trigger.Application, tmpStore, nil, nil)
 	vm := bc.spawnVMWithInterops(systemInterop)
+	vm.SetPriceGetter(getPrice)
 	return vm, tmpStore
 }
 

pkg/rpc/server.go

@@ -400,7 +400,7 @@ func (s *Server) runScriptInVM(script []byte) *wrappers.InvokeResult {
 	_ = vm.Run()
 	result := &wrappers.InvokeResult{
 		State:       vm.State(),
-		GasConsumed: "0.1",
+		GasConsumed: vm.GasConsumed().String(),
 		Script:      hex.EncodeToString(script),
 		Stack:       vm.Estack(),
 	}