Use high-confidence estimates

curl --request POST \
  --url https://api.goshippo.com/v2/estimates \
  --header 'Authorization: ShippoToken <API_TOKEN>' \
  --header 'Content-Type: application/json' \
  --data '{
    "origin": {
      "zip": "95122"
    },
    "destination": {
      "zip": "94103"
    },
    "parcel": {
      "length": 10,
      "width": 8,
      "height": 4,
      "distance_unit": "in",
      "weight": 2,
      "mass_unit": "lb"
    },
    "planned_ship_date": "2026-05-01T17:00:00Z",
    "confidence_level": "HIGH"
  }'

{
  "object_id": "9f8e7d6c-...",
  "planned_ship_date": "2026-05-01T17:00:00Z",
  "confidence_level": "HIGH",
  "latest_delivery_date": null,
  "predictions": [
    {
      "provider": "FedEx",
      "servicelevel": {
        "name": "Priority Overnight",
        "token": "fedex_priority_overnight"
      },
      "estimated_delivery_date_utc": "2026-05-02T23:00:00Z",
      "estimated_transit_days": 1
    },
    {
      "provider": "USPS",
      "servicelevel": {
        "name": "Priority Mail",
        "token": "usps_priority"
      },
      "estimated_delivery_date_utc": "2026-05-05T20:00:00Z",
      "estimated_transit_days": 4
    }
  ],
  "test": false
}

const COMMIT_DATE_UTC = "2026-05-06"; // External SLA deadline, expressed as UTC date
const DESTINATION_TIMEZONE = "America/Los_Angeles";

// Filter to service levels that meet the commit date (using UTC date for comparison)
const eligiblePredictions = estimatesResponse.predictions.filter(prediction => {
  const utcDate = prediction.estimated_delivery_date_utc.split("T")[0]; // "YYYY-MM-DD"
  return utcDate <= COMMIT_DATE_UTC;
});

// To commit to a date, convert to destination local time for customer-facing display
const commitOptions = eligiblePredictions.map(prediction => ({
  service: `${prediction.provider} ${prediction.servicelevel.name}`,
  token: prediction.servicelevel.token,
  commitDate: new Date(prediction.estimated_delivery_date_utc)
    .toLocaleDateString("en-US", {
      timeZone: DESTINATION_TIMEZONE,
      weekday: "long",
      month: "long",
      day: "numeric"
    }),
}));