Method PickN

txscript/stack.go:323–331

PickN copies the item N items back in the stack to the top. Stack transformation: PickN(0): [x1 x2 x3] -> [x1 x2 x3 x3] PickN(1): [x1 x2 x3] -> [x1 x2 x3 x2] PickN(2): [x1 x2 x3] -> [x1 x2 x3 x1]

(n int32)

// PickN(1): [x1 x2 x3] -> [x1 x2 x3 x2]
// PickN(2): [x1 x2 x3] -> [x1 x2 x3 x1]
func (s *stack) PickN(n int32) error {
	so, err := s.PeekByteArray(n)
	if err != nil {
		return err
	}
	s.PushByteArray(so)

	return nil
}

// RollN moves the item N items back in the stack to the top.
//