Function opcode0NotEqual

txscript/opcode.go:1517–1528

opcode0NotEqual treats the top item on the data stack as an integer and replaces it with either a 0 if it is zero, or a 1 if it is not zero. Stack transformation (x2==0): [... x1 0] -> [... x1 0] Stack transformation (x2!=0): [... x1 1] -> [... x1 1] Stack transformation (x2!=0): [... x1 17] -> [..

(op *opcode, data []byte, vm *Engine)

// Stack transformation (x2!=0): [... x1 1] -> [... x1 1]
// Stack transformation (x2!=0): [... x1 17] -> [... x1 1]
func opcode0NotEqual(op *opcode, data []byte, vm *Engine) error {
	m, err := vm.dstack.PopInt()
	if err != nil {
		return err
	}

	if m != 0 {
		m = 1
	}
	vm.dstack.PushInt(m)
	return nil
}

// opcodeAdd treats the top two items on the data stack as integers and replaces
// them with their sum.