import { createAdminClient } from '@spree/admin-sdk'

const client = createAdminClient({
  baseUrl: 'https://your-store.com',
  secretKey: 'sk_xxx',
})

const exchange = await client.orders.exchanges.fulfill('or_UkLWZg9DAJ', 'exch_UkLWZg9DAJ', {
  refund_method: 'store_credit',
})

spree api patch /orders/{order_id}/exchanges/{id}/fulfill -d '{"refund_method":"store_credit"}'

{
  "id": "exch_UkLWZg9DAJ",
  "number": "EX1001",
  "status": "fulfilled",
  "order_id": "or_UkLWZg9DAJ",
  "reason_id": null,
  "price_difference": "9.99",
  "approved_at": "2026-01-14T12:00:00Z",
  "received_at": "2026-01-15T12:00:00Z",
  "fulfilled_at": "2026-01-15T12:00:00Z",
  "canceled_at": null,
  "memo": "Wrong size",
  "metadata": {},
  "created_at": "2026-01-15T12:00:00.000Z",
  "updated_at": "2026-01-15T12:00:00.000Z",
  "stock_location_id": "sloc_UkLWZg9DAJ",
  "created_by_id": null,
  "created_by_type": null
}