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Calculate plan upgrade

POST 

/vms/:vm_id/resize/quote

Only upgrades are supported: CPU resources, RAM, disk and included traffic cannot decrease. Omit cpu_percent to keep the current share. The surcharge covers the remaining paid calendar periods at current plan prices with their originally purchased term discounts. paid_until does not change. expected_amount_usd is the maximum accepted surcharge, since it may decrease with time.

This calculation creates no order, charge or reservation. It can be called with an insufficient balance. Use amount_usd as expected_amount_usd when confirming the purchase.

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