How long the money lasts at the recent rate of burn

Available balance over the recent burn, per currency. **Net burn, not gross outgoings.** A business that collects as well as pays out is burning the difference. Dividing the balance by `money_out` would understate the runway of most businesses on this platform, and in the reassuring direction is the only direction this figure must not be wrong in. **Computed here rather than in the client**, which could otherwise do the arithmetic itself: a client reading a capped statement gets a truncated window, an understated burn, and an overstated runway. "Fourteen months" when it is four. Per currency and never summed — adding EUR to USD gives a number of nothing. `/fx/display/balance` is the endpoint that converts.

curl -X GET "https://example.com/api/b/v1/metrics/runway"

{  "basis_days": 90,  "currencies": [    {      "currency": "string",      "months": 6.4,      "burn_minor": 3800000,      "available_minor": 24320000,      "reason": "not_burning"    }  ]}