> For the complete documentation index, see [llms.txt](https://developers-apps-in-toss.toss.im/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers-apps-in-toss.toss.im/documentation/api-and-sdk-zh/sdk/domains-api/ying-yong-nei-gou-mai/iap.createonetimepurchaseorder.md).

# IAP.createOneTimePurchaseOrder

### 功能说明

会跳转到单笔应用内支付订单页。支付·商品发放流程由 `options` / `onEvent` / `onError` 会以事件风格选项处理。

* `options.sku`: 是要下单的商品 ID。(`productId`已弃用)
* `options.processProductGrant`: 在订单创建后发放商品时调用。会将发放成功与否 `true`/`false`作为（或 Promise）返回。
* `onEvent`: 支付成功时 `type: 'success'`并携带结果数据调用。
* `onError`: 在支付过程中发生错误时调用。

返回值 cleanup 函数会在应用内支付功能结束后务必调用以释放资源。

Toss App Android/iOS `5.219.0` 及以上版本可使用。在不支持的版本中调用时 `UNSUPPORTED_APP_VERSION` 会发生错误。

### 类型

```ts
IAP.createOneTimePurchaseOrder(params: IapCreateOneTimePurchaseOrderOptions): () => void;
```

**参数**

```ts
interface IapCreateOneTimePurchaseOrderOptions {
  options: {
    sku: string;
    /** @deprecated 使用 sku */
    productId?: string;
    processProductGrant: (params: {
      orderId: string;
    }) => boolean | Promise<boolean>;
  };
  onEvent: (event: {
    type: "success";
    data: IapCreateOneTimePurchaseOrderResult;
  }) => void | Promise<void>;
  onError: (error: unknown) => void | Promise<void>;
}

interface IapCreateOneTimePurchaseOrderResult {
  orderId: string;
  displayName: string;
  displayAmount: string;
  amount: number;
  currency: string;
  fraction: number;
  miniAppIconUrl: string | null;
}
```

**响应**

在支付流程结束后调用以释放资源的 cleanup 函数（`() => void`）会被返回。

### 错误

错误代码可 `onError`作为……接收，或在包裹调用的 `try/catch`在其中捕获的错误的 `error.code` 值。

| 代码                                | 说明                                                                                                                            |
| --------------------------------- | ----------------------------------------------------------------------------------------------------------------------------- |
| `INVALID_PRODUCT_ID`              | 商品 ID 无效或商品不存在时。                                                                                                              |
| `PAYMENT_PENDING`                 | 支付仍在等待批准时。                                                                                                                    |
| `NETWORK_ERROR`                   | 因网络/服务器问题而无法处理请求时。                                                                                                            |
| `INVALID_USER_ENVIRONMENT`        | 在特定设备·账户·设置下无法购买该商品时。                                                                                                         |
| `ITEM_ALREADY_OWNED`              | 尝试再次购买已购买过的商品时。                                                                                                               |
| `APP_MARKET_VERIFICATION_FAILED`  | 已完成支付，但 App Store 验证失败时。                                                                                                      |
| `TOSS_SERVER_VERIFICATION_FAILED` | 已完成支付，但向服务器传送/保存失败时。                                                                                                          |
| `INTERNAL_ERROR`                  | 因服务器内部问题而无法处理请求时。                                                                                                             |
| `KOREAN_ACCOUNT_ONLY`             | 在 iOS 上不是韩国账号时。                                                                                                               |
| `USER_CANCELED`                   | 用户离开订单页时。                                                                                                                     |
| `PRODUCT_NOT_GRANTED_BY_PARTNER`  | 合作方商品发放失败时。                                                                                                                   |
| `UNSUPPORTED_APP_VERSION`         | 如果当前运行的 Toss App 版本不支持此功能，则调用后会立即发生。 `IAP.createOneTimePurchaseOrder.isSupported()`请先通过它确认，发生时 `error.message`请向用户显示（更新提示文案）。 |

### 示例代码

```js
import { IAP } from "@apps-in-toss/web-framework";

const button = document.querySelector("#buy-button");
let cleanup;

button.addEventListener("click", () => {
  try {
    cleanup = IAP.createOneTimePurchaseOrder({
      options: {
        sku: "coin_100",
        processProductGrant: ({ orderId }) => {
          // 编写商品发放逻辑
          console.log("发放处理：", orderId);
          return true;
        },
      },
      onEvent: (event) => {
        console.log(event.type, event.data);
      },
      onError: (error) => {
        console.error(error);
      },
    });
  } catch (error) {
    console.error(error);
  }
});

// 离开页面时 cleanup?.()
```


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