Tehran- IRNA- On the eve of signing an understanding to end the imposed war against Iran, the role of the former and honest mediator between Tehran and Washington is felt more than ever. At different times, Muscat used all its best efforts so that the stability would not be threatened, and although the extravagance of the US and the Israeli regime did not allow it to bear fruit and imposed costs on Oman, it made Muscat a more important actor after the war.