## Patch Smart Tiered Cache setting

`client.Cache.SmartTieredCache.Edit(ctx, params) (*SmartTieredCacheEditResponse, error)`

**patch** `/zones/{zone_id}/cache/tiered_cache_smart_topology_enable`

Smart Tiered Cache dynamically selects the single closest upper tier for each of your website’s origins with no configuration required, using our in-house performance and routing data. Cloudflare collects latency data for each request to an origin, and uses the latency data to determine how well any upper-tier data center is connected with an origin. As a result, Cloudflare can select the data center with the lowest latency to be the upper-tier for an origin.

### Parameters

- `params SmartTieredCacheEditParams`

  - `ZoneID param.Field[string]`

    Path param: Identifier.

  - `Value param.Field[SmartTieredCacheEditParamsValue]`

    Body param: Enable or disable the Smart Tiered Cache.

    - `const SmartTieredCacheEditParamsValueOn SmartTieredCacheEditParamsValue = "on"`

    - `const SmartTieredCacheEditParamsValueOff SmartTieredCacheEditParamsValue = "off"`

### Returns

- `type SmartTieredCacheEditResponse struct{…}`

  - `ID SmartTieredCacheEditResponseID`

    The identifier of the caching setting.

    - `const SmartTieredCacheEditResponseIDTieredCacheSmartTopologyEnable SmartTieredCacheEditResponseID = "tiered_cache_smart_topology_enable"`

  - `Editable bool`

    Whether the setting is editable.

  - `Value SmartTieredCacheEditResponseValue`

    Value of the Smart Tiered Cache zone setting.

    - `const SmartTieredCacheEditResponseValueOn SmartTieredCacheEditResponseValue = "on"`

    - `const SmartTieredCacheEditResponseValueOff SmartTieredCacheEditResponseValue = "off"`

  - `ModifiedOn Time`

    Last time this setting was modified.

### Example

```go
package main

import (
  "context"
  "fmt"

  "github.com/cloudflare/cloudflare-go"
  "github.com/cloudflare/cloudflare-go/cache"
  "github.com/cloudflare/cloudflare-go/option"
)

func main() {
  client := cloudflare.NewClient(
    option.WithAPIToken("Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY"),
  )
  response, err := client.Cache.SmartTieredCache.Edit(context.TODO(), cache.SmartTieredCacheEditParams{
    ZoneID: cloudflare.F("023e105f4ecef8ad9ca31a8372d0c353"),
    Value: cloudflare.F(cache.SmartTieredCacheEditParamsValueOn),
  })
  if err != nil {
    panic(err.Error())
  }
  fmt.Printf("%+v\n", response.ID)
}
```

#### Response

```json
{
  "errors": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "messages": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "success": true,
  "result": {
    "id": "tiered_cache_smart_topology_enable",
    "editable": true,
    "value": "on",
    "modified_on": "2014-01-01T05:20:00.12345Z"
  }
}
```