Function opcodeNumEqual

txscript/opcode.go:1628–1646

opcodeNumEqual treats the top two items on the data stack as integers. When they are equal, they are replaced with a 1, otherwise a 0. Stack transformation (x1==x2): [... 5 5] -> [... 1] Stack transformation (x1!=x2): [... 5 7] -> [... 0]

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

// Stack transformation (x1==x2): [... 5 5] -> [... 1]
// Stack transformation (x1!=x2): [... 5 7] -> [... 0]
func opcodeNumEqual(op *opcode, data []byte, vm *Engine) error {
	v0, err := vm.dstack.PopInt()
	if err != nil {
		return err
	}

	v1, err := vm.dstack.PopInt()
	if err != nil {
		return err
	}

	if v0 == v1 {
		vm.dstack.PushInt(scriptNum(1))
	} else {
		vm.dstack.PushInt(scriptNum(0))
	}

	return nil
}

// opcodeNumEqualVerify is a combination of opcodeNumEqual and opcodeVerify.
//