Paypal，IPN/Webhooks如何在我的Paypal账户中创建发票并发送款项

Question

我希望通过IPN或Webhooks创建以下情况。用户想要提取一些钱，当他点击提款按钮时，将在我的Paypal账户中生成发票，我将有选择接受或拒绝发送资金的选项。接受或拒绝后，我的应用程序将收到通知，以确定是否已发送资金。

我正在阅读他们的文档，但没有找到我想要的内容。

- jalanga

Answer 1

我想你对于需要使用哪些PayPal功能有些困惑。

IPN和Webhooks是事务后处理工具。只有在发票已经创建、收到付款、提交争议等之后才会触发它们。

此外，您不希望使用实际的发票API，因为PayPal会对其收取更高的费用。

如果您为用户提供了一个提款按钮，您可以使用Payouts API直接触发支付。

您没有说明您正在使用哪种语言，但以下是一个PHP脚本示例，可以触发支付：

<?php

$paypal_client_id = "your_client_id";
$paypal_secret = "your_secret";

$payee_email = "[e-mail]";
$amount = 10.00;
$currency = "USD";

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => "https://api.paypal.com/v1/oauth2/token",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "grant_type=client_credentials",
  CURLOPT_HTTPHEADER => array(
    "Authorization: Basic " . base64_encode("$paypal_client_id:$paypal_secret"),
    "Content-Type: application/x-www-form-urlencoded"
  ),
));

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  $access_token = json_decode($response)->access_token;
  
  $curl = curl_init();
  
  curl_setopt_array($curl, array(
    CURLOPT_URL => "https://api.paypal.com/v1/payments/payouts",
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_ENCODING => "",
    CURLOPT_MAXREDIRS => 10,
    CURLOPT_TIMEOUT => 30,
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => "POST",
    CURLOPT_POSTFIELDS => "{\"sender_batch_header\": {\"sender_batch_id\":\"batch_" . time() . "\",\"email_subject\":\"You have a payment\"},\"items\":[{\"recipient_type\":\"EMAIL\",\"amount\":{\"value\":$amount,\"currency\":\"$currency\"},\"receiver\":\"$payee_email\",\"note\":\"Thank you.\",\"sender_item_id\":\"item_" . time() . "\"}]}",
    CURLOPT_HTTPHEADER => array(
      "Content-Type: application/json",
      "Authorization: Bearer $access_token"
    ),
  ));
  
  $response = curl_exec($curl);
  $err = curl_error($curl);
  
  curl_close($curl);
  
  if ($err) {
    echo "cURL Error #:" . $err;
  } else {
    $payout = json_decode($response);
    
    if ($payout->batch_header->batch_status == "SUCCESS") {
      echo "Payout sent successfully!";
    } else {
      echo "Payout failed: " . $payout->batch_header->failure_reason;
    }
  }
}

为了让您的应用程序在支付完成时接收到通知，您可以订阅PAYMENT.PAYOUTSBATCH.SUCCESS Webhook。

以下是一个示例脚本，可订阅该Webhook：

<?php

$paypal_client_id = "your_client_id";
$paypal_secret = "your_secret";

$webhook_url = "https://www.example.com/webhooks/payouts_success";

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => "https://api.paypal.com/v1/oauth2/token",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "grant_type=client_credentials",
  CURLOPT_HTTPHEADER => array(
    "Authorization: Basic " . base64_encode("$paypal_client_id:$paypal_secret"),
    "Content-Type: application/x-www-form-urlencoded"
  ),
));

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  $access_token = json_decode($response)->access_token;
  
  $curl = curl_init();
  
  curl_setopt_array($curl, array(
    CURLOPT_URL => "https://api.paypal.com/v1/notifications/webhooks",
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_ENCODING => "",
    CURLOPT_MAXREDIRS => 10,
    CURLOPT_TIMEOUT => 30,
    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
    CURLOPT_CUSTOMREQUEST => "POST",
    CURLOPT_POSTFIELDS => "{\"url\":\"$webhook_url\",\"event_types\":[{\"name\":\"PAYMENT.PAYOUTSBATCH.SUCCESS\"}]}",
    CURLOPT_HTTPHEADER => array(
      "Content-Type: application/json",
      "Authorization: Bearer $access_token"
    ),
  ));
  
  $response = curl_exec($curl);
  $err = curl_error($curl);
  
  curl_close($curl);
  
  if ($err) {
    echo "cURL Error #:" . $err;
  } else {
    $webhook = json_decode($response);
    
    if ($webhook->name == "PAYMENT.PAYOUTSBATCH.SUCCESS") {
      echo "Webhook subscribed successfully!";
    } else {
      echo "Webhook subscription failed: " . $webhook->name;
    }
  }
}

然后您将在提供的Webhook URL上设置Webhook处理程序。以下是可能的示例：

<?php

$webhook_data = json_decode(file_get_contents('php://input'), true);

if ($webhook_data["event_type"] == "PAYMENT.PAYOUTSBATCH.SUCCESS") {
  // handle the payout success event
  $batch_id = $webhook_data["resource"]["batch_header"]["payout_batch_id"];
  $status = $webhook_data["resource"]["batch_header"]["batch_status"];
  
  // log the batch ID and status for reference
  error_log("Batch ID: $batch_id");
  error_log("Status: $status");
  
  // process the successful payout
  // ...
} else {
  // handle other event types
  // ...
}

- Drew Angell