Never let a good ledger system go to waste

In Major Threat To Dollar's Reserve Status, Russia Offers To Join European SWIFT-Bypass 

Three weeks after a meeting between the countries who singed the Iran nuclear deal, also known as the Joint Comprehensive Plan of Action (JCPOA), which was ditched by US, French, British and German officials said the trade mechanism which was proposed last summer - designed to circumvent both SWIFT as well as US sanctions banning trade with Iran - called Instex, is now operational.
And while we await for the White House to threaten Europe with even greater tariffs unless it ends this special purpose vehicle - it already did once back in May when it warned that anyone associated with the SPV could be barred from the U.S. financial system if it goes into effect - a response from the US is now assured, because in the biggest attack on the dollar as a reserve currency to date, on Thursday, Russia signaled its willingness to join the controversial payments channel, and has called on Brussels to expand the new mechanism to cover oil exports, the FT reported.

Russia got sanctioned anyway, so why not adopt INSTEX for all Asian trade?