package smartcontract import ( "fmt" "math/big" "github.com/nspcc-dev/neo-go/pkg/vm/stackitem" ) // ParameterFromStackItem converts stackitem.Item to Parameter. func ParameterFromStackItem(i stackitem.Item, seen map[stackitem.Item]bool) Parameter { switch t := i.(type) { case stackitem.Null, *stackitem.Pointer: return NewParameter(AnyType) case *stackitem.BigInteger: return Parameter{ Type: IntegerType, Value: i.Value().(*big.Int).Int64(), } case stackitem.Bool: return Parameter{ Type: BoolType, Value: i.Value().(bool), } case *stackitem.ByteArray: return Parameter{ Type: ByteArrayType, Value: i.Value().([]byte), } case *stackitem.Interop: return Parameter{ Type: InteropInterfaceType, Value: nil, } case *stackitem.Buffer: return Parameter{ Type: ByteArrayType, Value: i.Value().([]byte), } case *stackitem.Struct, *stackitem.Array: var value []Parameter if !seen[i] { seen[i] = true for _, stackItem := range i.Value().([]stackitem.Item) { parameter := ParameterFromStackItem(stackItem, seen) value = append(value, parameter) } } return Parameter{ Type: ArrayType, Value: value, } case *stackitem.Map: value := make([]ParameterPair, 0) if !seen[i] { seen[i] = true for _, element := range i.Value().([]stackitem.MapElement) { value = append(value, ParameterPair{ Key: ParameterFromStackItem(element.Key, seen), Value: ParameterFromStackItem(element.Value, seen), }) } } return Parameter{ Type: MapType, Value: value, } default: panic(fmt.Sprintf("unknown stack item type: %v", t)) } }