```
'YOUR_PUBLIC_KEY_ID',
'private_key' => 'keys/private.pem', // Path to RSA Private Key (or a string representation)
'region' => 'YOUR_REGION_CODE',
'sandbox' => true,
'algorithm' => 'AMZN-PAY-RSASSA-PSS-V2'
);
$payload = array(
'chargePermissionType' => 'Recurring',
'recurringMetadata' => array(
'frequency' => array(
'unit' => 'Month',
'value' => '1'
),
'amount' => array(
'amount' => '30',
'currencyCode' => 'USD'
)
)
);
try {
$client = new Amazon\Pay\API\Client($amazonpay_config);
$result = $client->updateCheckoutSession('bd504926-f659-4ad7-a1a9-9a747aaf5275', $payload);
if ($result['status'] === 201) {
$response = json_decode($result['response'], true);
$checkoutSessionId = $response['checkoutSessionId'];
} else {
// check the error
echo 'status=' . $result['status'] . '; response=' . $result['response'];
}
} catch (Exception $e) {
// handle the exception
echo $e;
}
?>
```
```
using Amazon.Pay.API.Types;
using Amazon.Pay.API.WebStore.CheckoutSession;
using Amazon.Pay.API.WebStore;
using Amazon.Pay.API.WebStore.Types;
public class Sample
{
public WebStoreClient InitiateClient()
{
// set up config
var payConfiguration = new ApiConfiguration
(
region: Region.YOUR_REGION_CODE,
environment: Environment.Sandbox,
publicKeyId: "YOUR_PUBLIC_KEY_ID",
privateKey: "PATH_OR_CONTENT_OF_YOUR_PRIVATE_KEY",
algorithm: AmazonSignatureAlgorithm.V2
);
// init API client
var client = new WebStoreClient(payConfiguration);
return client;
}
public CheckoutSessionResponse UpdateCheckoutSession(string checkoutSessionId)
{
// prepare the request
var request = new UpdateCheckoutSessionRequest()
{
ChargePermissionType = ChargePermissionType.Recurring,
RecurringMetadata = {
Frequency = {
Unit = FrequencyUnit.Month,
Value = 1
}
Amount = {
Amount = 30,
CurrencyCode = Currency.USD
}
}
};
// send the request
var result = client.UpdateCheckoutSession(checkoutSessionId, request);
// check if API call was successful
if (!result.Success)
{
// do something, e.g. throw an error
}
return result;
}
}
```
```
import com.amazon.pay.api.AmazonPayResponse;
import com.amazon.pay.api.PayConfiguration;
import com.amazon.pay.api.WebstoreClient;
import com.amazon.pay.api.exceptions.AmazonPayClientException;
import com.amazon.pay.api.types.Environment;
import com.amazon.pay.api.types.Region;
import org.json.JSONObject;
public void sample() {
PayConfiguration payConfiguration = null;
try {
payConfiguration = new PayConfiguration()
.setPublicKeyId("YOUR_PUBLIC_KEY_ID")
.setRegion(Region.YOUR_REGION_CODE)
.setPrivateKey("YOUR_PRIVATE_KEY")
.setEnvironment(Environment.SANDBOX)
.setAlgorithm("AMZN-PAY-RSASSA-PSS-V2");
WebstoreClient webstoreClient = new WebstoreClient(payConfiguration);
AmazonPayResponse response = null;
String checkoutSessionId = "bd504926-f659-4ad7-a1a9-9a747aaf5275";
JSONObject payload = new JSONObject();
payload.put("chargePermissionType", "Recurring");
JSONObject recurringMetadata = new JSONObject();
JSONObject frequency = new JSONObject();
frequency.put("unit","Month");
frequency.put("value","1");
recurringMetadata.put("frequency", frequency);
JSONObject amount = new JSONObject();
amount.put("amount","30");
amount.put("currencyCode","USD");
recurringMetadata.put("amount", amount);
payload.put("recurringMetadata", recurringMetadata);
response = webstoreClient.updateCheckoutSession(checkoutSessionId, payload);
} catch (AmazonPayClientException e) {
e.printStackTrace();
}
}
```
```html
const fs = require('fs');
const Client = require('@amazonpay/amazon-pay-api-sdk-nodejs');
const config = {
publicKeyId: 'YOUR_PUBLIC_KEY_ID',
privateKey: fs.readFileSync('tst/private.pem'),
region: 'YOUR_REGION_CODE',
sandbox: true,
algorithm: 'AMZN-PAY-RSASSA-PSS-V2'
};
const payload = {
chargePermissionType: "Recurring",
recurringMetadata: {
frequency: {
unit: "Month",
value: "1"
},
amount: {
amount: "30",
currencyCode: "USD"
}
}
};
const testPayClient = new Client.WebStoreClient(config);
const response = testPayClient.updateCheckoutSession('bd504926-f659-4ad7-a1a9-9a747aaf5275', payload);
response.then(function (result) {
console.log(result.data);
}).catch(err => {
console.log(err);
});
```