# Daou (PAYJOA)
### 1. Configure Daou PG settings
Refer to the [**Daou settings**](https://portone.gitbook.io/docs-en/ready/2.-pg/payment-gateway-settings/daou) page to configure the PG settings.
### 2. Request payment
To open the payment window, call [JavaScript SDK](https://portone.gitbook.io/docs-en/sdk/javascript-sdk) IMP.**request\_pay**(param, callback).
In PC browsers, **callback** is invoked after calling `IMP.request_pay(param, callback)`. In mobile browsers, the page is redirected to **m\_redirect\_url**.
{% hint style="warning" %}
**PAYJOA payment window integration requires ****JS SDK 1.2.0**** or later version.**
{% endhint %}
{% tabs %}
{% tab title="Authenticated payment request" %}
{% code title="Javascript SDK" %}
```javascript
IMP.request_pay({
pg : 'daou',
pay_method : 'card',
merchant_uid: 'mid_1234567890',
escrow: false,
amount: 1004,
name: 'NF long padding jacket M',
buyer_name: 'John Doe',
buyer_email: 'hello@world.com',
buyer_tel: '01012345678',
digital : false, // Set to true if contracted as digital
m_redirect_url: 'https://allerts.com/payments/complete',
bypass: {
// PAYJOA (DaouData) specific parameters
daou: {
PRODUCTCODE: 'iamport',
CASHRECEIPTFLAG: 2,
},
},
app_scheme: 'iamportappscheme',
}, function(rsp) { // callback logic
//* ...Omitted... *//
});
```
{% endcode %}
####
#### Key parameter description
**`pg`** **\***\*\* \*\***string**
**PG code**
* If not specified and this is the only PG setting that exists, `default PG` is automatically set.
* If there are multiple PG settings, set to **`daou`**.
**`pay_method`** **\***\*\* \*\***string**
**Payment method code**
Payment method codes
* `card` (credit card)
* `trans`(instant account transfer)
* `vbank`(virtual account)
**`merchant_uid`** **\***\*\* \*\***string**
**Order ID**
Must be unique for each request.
**`digital`****`*`****`string`**
**Digital contents option**
Must specify the value based on the contract between merchant and PAYJOA. Otherwise, request will fail.
**` bypass.daou.PRODUCTCODE`` `` `****`string`**
**Product code**
If there is no specification for the value and the value is not specified, i'mport sets it to the default value (iamport) and sends it to PAYJOA.
**` bypass.daou.CASHRECEIPTFLAG`` `` `****``****`integer`**
**Cash receipt issuance code**
Auto cash receipt issuance code for cash payments (account transfer, virtual account)
**`1: Allow`**
**`2: Block`**
**` app_scheme`` `` `****`string`**
**Mobile app URL scheme**
Required in mobile app
**`amount`** **\***\*\* \*\***integer**
**Payment amount**
Must be an integer (not string)
**` escrow`` `` `****`boolean`**
**Escrow option**
Only supports account transfer and virtual account payment.
{% endtab %}
{% tab title="Non-authenticated API request" %}
**You can use i'mport REST API to request billing key, request payment, and schedule payment.**
#### Request one-time payment
To request a one-time payment, use the key-in REST[ **API POST /subscribe/payments/onetime**](https://portone.gitbook.io/docs-en/api/api/request-non-authenticated-payment-one-time-api). The card information is not saved during this process.
```
curl -H "Content-Type: application/json" \
-X POST -d '{"merchant_uid":"order_id_8237352", "card_number":"1234-1234-1234-1234", "expiry":"2019-01", "birth":"123456", "amount":3000}' \
https://api.iamport.kr/subscribe/payments/onetime
```
####
#### Request billing key
To request a billing key, use the billing key request REST [**API POST /subscribe/customers/{customer\_uid}**](https://portone.gitbook.io/docs-en/api/billing-key-api/api-1).
```
curl -H "Content-Type: application/json" \
-X POST -d '{"card_number":"1234-1234-1234-1234", "expiry":"2025-12", "birth":"820213", "pwd_2digit":"00"}' \
https://api.iamport.kr/subscribe/customers/your-customer-unique-id
```
#### Request billing key + initial payment
To request a billing key and initial payment, use the key-in REST [**API POST /subscribe/payments/onetime**](https://portone.gitbook.io/docs-en/api/api/request-non-authenticated-payment-one-time-api).
* **`customer_uid`** : required for saving the billing key.
```
curl -H "Content-Type: application/json" \
-X POST -d '{"customer_uid":"your-customer-unique-id", "merchant_uid":"order_id_8237352", "card_number":"1234-1234-1234-1234", "expiry":"2019-01", "birth":"123456", "amount":3000}' \
https://api.iamport.kr/subscribe/payments/onetime
```
#### Request payment with billing key
After successfully getting the billing key and making the initial payment, the billing key is stored on the i'mport server mapped 1:1 with the specified `customer_uid`. For security reasons, the server cannot directly access the billing key. Subsequent payments can be requested by calling the repeat pay REST API ([**POST /subscribe/payments/again**](https://portone.gitbook.io/docs-en/api/api/api)) with the `customer_uid` as follows:
```
curl -H "Content-Type: application/json" \
-X POST -d '{"customer_uid":"your-customer-unique-id", "merchant_uid":"order_id_8237352", "amount":3000}' \
https://api.iamport.kr/subscribe/payments/again
```
**For detailed information, refer to:**
{% content-ref url="../../auth/guide-1" %}
[guide-1](https://portone.gitbook.io/docs-en/auth/guide-1)
{% endcontent-ref %}
{% endtab %}
{% endtabs %}
### 3. Additional functions
{% tabs %}
{% tab title="Installment setting" %}
{% code title="javascript" %}
```javascript
display: {
card_quota: [6] // Display up to 6 months installment plans
}
```
{% endcode %}
**Parameters**
* **card\_quota :**
* `[]`: Only immediate pay
* `2,3,4,5,6`: immediate, 2, 3, 4, 5, 6 month installment plans\\
{% hint style="info" %}
Installment plan option is available only for **KRW 50,000 or more**.
{% endhint %}
{% endtab %}
{% tab title="Escrow payment" %}
For escrow payment, the **`escrow`** parameter must be set to **true**. When the escrow payment is completed, the merchant must register the shipping information for **settlement**. You can manage shipping information by using the [**Add delivery info**](https://portone.gitbook.io/docs-en/api/escrow-api/add-delivery-info-api) and [**Update delivery info**](https://portone.gitbook.io/docs-en/api/escrow-api/update-delivery-info-api) APIs.
{% code title="API Body Example" %}
```javascript
{
"logis": {
"invoice": "1728384716123",
"company": "CJGLS",
"receiving_at": "20220215",
"address": "16, Seongsui-ro 20-gil"
},
"receiver": {
"name": "John DOe"
},
"sender": {
"relationship": "self"
}
}
```
{% endcode %}
{% hint style="danger" %}
**Precaution**
* When adding/updating the escrow delivery information, PAYJOA does not validate the delivery information (tracking number, courier name, etc.) received from the merchant.
{% endhint %}
{% endtab %}
{% endtabs %}