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Chinese alternative to SWIFT.
CIPS
Putin has been gearing up for more Yuan in his life for years. It aint no SWIFT but its a part solution. Combine that with off shore gold wealth and crypto, and maybe Russia could limp along for quite a long time. In any case, this is not something that the Russians have forgotten to plan for.
https://en.wikipedia.org/wiki/Cross-Border_Inter-Bank_Payments_System
Don't have a link, as I saw it on the news yesterday, but it seems that the plan B is to channel all USD transactions through a Chinese alternative to SWIFT.