Скандалы, интриги, расследования!

Открываем проспект по первому попавшемуся евробонду, например: https://minfin.gov.ru/common/upload/library/2018/12/main/Russia-2027_2047_Prospectus-Final.pdf

Payments of Alternative Payment Currency Equivalent

Notwithstanding any other provision in these Conditions, if, for reasons beyond its control, the Russian
Federation is unable to make payments of principal or interest (in whole or in part) in respect of the
Bonds in U.S. dollars (an “Alternative Payment Currency Event”), the Russian Federation shall make
such payments (in whole or in part) in the Alternative Payment Currency on the due date at the
Alternative Payment Currency Equivalent of any such U.S. dollar-denominated amount.

То есть как минимум с 2018 года в выпускаемые государством обязательства включено право выплат в рублях по курсу.