Function createBillingFetch

packages/ai-fal/src/utils/billing.ts:105–117

(
  baseFetch: typeof fetch = globalThis.fetch,
)

 * mutating any global.
 */
export function createBillingFetch(
  baseFetch: typeof fetch = globalThis.fetch,
): typeof fetch {
  return async (input, init) => {
    const response = await baseFetch(input, init)
    try {
      recordBillableUnitsFromResponse(response)
    } catch {
      // Capturing usage must never break the underlying request.
    }
    return response
  }
}