苹果（apple）支付退款通知、api

java 后端 ios json 2023-08-20 08:08:18 352人浏览独家记忆

摘要

苹果（apple）支付退款通知、api 背景：用户在使用苹果支付购买商品后，可以直接像苹果申请退款，如果申请成功将导致商户直接构成损失。甚至某网络平台有这种专门薅羊毛的店铺，低价出售虚拟商品，再申请退款。所以有必要对用户发起的退款订单做及

苹果（apple）支付退款通知、api

背景：

用户在使用苹果支付购买商品后，可以直接像苹果申请退款，如果申请成功将导致商户直接构成损失。甚至某网络平台有这种专门薅羊毛的店铺，低价出售虚拟商品，再申请退款。所以有必要对用户发起的退款订单做及时响应，比如扣除对应的虚拟商品或像apple官方提供凭证使其退款不成功。

方案选型：

主动查询退款订单，文档地址
被动接收服务器通知，文档地址

主动请求退款api：

生成Jwt身份标识，文档地址

添加依赖项
```
com.auth0java-jwt3.8.1
```

示例代码

 private String generateJwtToken() throws Exception {        Map<String, Object> headers = new HashMap<>();        // apple指定ES256算法        headers.put("alg", "ES256");        // 密钥ID        headers.put("kid", "***********");        // jwt格式        headers.put("typ", "JWT");        return JWT.create()                .withHeader(headers)                // issId：见apple connect后台右上角                .withIssuer("*******-4f2e-4296-b2c7-**********")                // 签名日期                .withIssuedAt(new Date())                // 失效日期：最晚一个小时，否则报错401                .withExpiresAt(DateUtils.addHours(new Date(), 1))                // 目标接收者，固定值                .withAudience("appstoreconnect-v1")                // 包名，bundleId                .withClaim("bid", "com.********")                // 签名密钥，需要用到apple connect下载p8文件                .sign(AlGorithm.ECDSA256(null, (ECPrivateKey) getPrivateKey("/payment/apple/AuthKey_****.p8")));    }        private PrivateKey getPrivateKey(String filename) throws Exception {        String content = new String(Files.readAllBytes(Paths.get(filename)), StandardCharsets.UTF_8);        try {            String privateKey = content.replace("-----BEGIN PRIVATE KEY-----", "")                    .replace("-----END PRIVATE KEY-----", "")                    .replaceAll("\\s+", "");            KeyFactory kf = KeyFactory.getInstance("EC");            return kf.generatePrivate(new PKCS8EncodedKeySpec(Base64.getDecoder().decode(privateKey)));        } catch (InvalidKeySpecException e) {            throw new RuntimeException("Invalid key fORMat");        }    }

请求、解析数据：

API地址：生产环境：GET https://api.storekit.itunes.apple.com/inApps/v2/refund/lookup/{originalTransactionId}；沙盒环境：GET Https://api.storekit-sandbox.itunes.apple.com/inApps/v2/refund/lookup/{originalTransactionId}

示例代码和返回值：

  private RefundHistResponseVO getRefundHist() throws Exception {        String token = generateToken();        HttpHeaders header = new HttpHeaders();        header.set("Authorization", "Bearer "+ token);        RequestEntity<Map<String, String>> requestEntity = new RequestEntity<>(header, HttpMethod.GET, URI.create("https://api.storekit-sandbox.itunes.apple.com/inApps/v2/refund/lookup/2000000308586738"));        ResponseEntity<RefundHistResponseVO> exchange = restTemplate.exchange(requestEntity, RefundHistResponseVO.class);        return exchange.getBody(); }@Data    public static class RefundHistResponseVO{                private List<String> signedTransactions;                private String revision;                 private Boolean hasMore;    }

{    "signedTransactions": [       "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...",        "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...",        "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..."    ],    "revision": "1680777292000_2000000308641111",    "hasMore": false}

附上jws格式解析代码和解析后的参数示例：

 public void handleRefundOrder() throws Exception {        RefundHistResponseVO refundHist = getRefundHist();        for (String signedTransaction : refundHist.getSignedTransactions()) {            DecodedJWT decode = JWT.decode(signedTransaction);            TransactionResponseVO responseVO = JSONObject.parseObject(new String(Base64.getDecoder().decode(decode.getPayload())), TransactionResponseVO.class);            // do something        }    }@Data    public static class TransactionResponseVO{        private String transactionId; // 交易订单号        private String originalTransactionId; // 原始交易订单号        private String bundleId; // 包名        private String productId; // 商品编号        private Date purchaseDate; // 购买日期        private Date originalPurchaseDate; // 原始订单购买日期        private Integer quantity; // 商品数量                private String type;                private String inAppOwnershipType;        private Date signedDate; // 签名日期        private Integer revocationReason; // 退款方 1: apple ；0：客户        private Date revocationDate; // 退款时间        private String environment; //环境    }

{  "transactionId": "2000000308611111",  "originalTransactionId": "2000000308611111",  "bundleId": "com.******",  "productId": "a10001",  "purchaseDate": 1680773327000,  "originalPurchaseDate": 1680773327000,  "quantity": 1,  "type": "Consumable",  "inAppOwnershipType": "PURCHASED",  "signedDate": 1681198157817,  "revocationReason": 0,  "revocationDate": 1680777292000,  "environment": "Sandbox"}

这里使用的是v2版本的api接口，有几个注意点：
1. 返回每页大小是20，下一页请求需带上revision参数，v1版本接口是50条且明文显示，官方不建议使用，文档地址
2. 此接口只能查询已成功的退款订单（在生产环境，用户发起退款会有12小时的审核时间，开发者可以提供凭证证明商品发放成功），不能查询已发起但未通过的退款申请。
3. original_transaction_id是必传参数，可以是任意一笔交易id，重点是交易id所关联的用户：apple ID，也就是说同一个appleId产生的订单在这个接口返回的结果是一样的。（吐槽一下苹果的api。。这个接口不能查询app范围内的所有退款订单，因为订单id是必传字段，但返回值跟这笔订单又没有强关联，而是关联用户）
4. 如果需要做邮件实时通知、用户发起退款申请后自动响应。建议使用另外一种方法：接收服务器通知

接收服务器通知：

配置服务器通知url：文档地址，步骤挺简单的，打开应用配置，设置沙盒和生产环境的服务器接口地址即可。注意这里也选择V2版本通知，不建议使用V1版本。
通知类型：文档地址，这里主要关注几个消耗品商品购买的类型（其他类型包含订阅类型购买的变更通知有需要的可以自行对接）：
- CONSUMPTION_REQUEST：用户发起退款
- REFUND：用户退款成功
- TEST：通过api发起的测试通知，测试服务器的通知url是否配置成功
官方提供的沙盒环境测试退款方法：文档地址，需要在本地xcode跑StoreKit Test，挺麻烦的需要iOS开发人员支持。这里提供一个免费的WEBhook网址，可以用于本地测试接收通知：https://webhook.site/
用户发起退款申请后，服务器会收到一个notificationType = CONSUMPTION_REQUEST 的通知，代表用户发起退款，开发者可以在接收通知的逻辑中调用发送消费信息的api，以证明用户退款无效：文档地址

苹果审核退款申请通过后，服务器会收到一个notificationType = REFUND 的通知，代表退款成功，开发者可以在处理扣除虚拟商品等操作。下面是退款通知的数据示例及验证签名代码：

请求报文：

{"signedPayload":"eyJhbGciOiJFUzI1NiIsIng1YyI6WyJNSUlFTURDQ0E3YWdBd0lCQWdJUWFQb1BsZHZwU29FSDBsQnJqRFB2OWpBS0JnZ3Foa2pPUFFRREF6QjFNVVF3UWdZRFZRUURERHRCY0hCc1pTQlhiM0pzWkhkcFpHVWdSR1YyWld4dmNHVnlJRkpsYkdGMGFXOXVjeUJEWlhKMGFXWnBZMkYwYVc5dUlFRjFkR2h2Y21sMGVURUxNQWtHQTFVRUN3d0NSell4RXpBUkJnTlZCQW9NQ2tGd2NHeGxJRWx1WXk0eEN6QUpCZ05WQkFZVEFsVlRNQjRYRFRJeE1EZ3lOVEF5TlRBek5Gb1hEVEl6TURreU5EQXlOVEF6TTFvd2daSXhRREErQm..."}

验签并解析数据

 private jsONObject verifyAndGet(String jws) throws CertificateException {    DecodedJWT decodedJWT = JWT.decode(jws);        // 拿到 header 中 x5c 数组中第一个        String header = new String(java.util.Base64.getDecoder().decode(decodedJWT.getHeader()));        String x5c = JSONObject.parseObject(header).getJSONArray("x5c").getString(0);        // 获取公钥        PublicKey publicKey = getPublicKeyByX5c(x5c);        // 验证 token        Algorithm algorithm = Algorithm.ECDSA256((ECPublicKey) publicKey, null);        try {            algorithm.verify(decodedJWT);        } catch (SignatureVerificationException e) {            return throw new RunTimeException();        }// 解析数据        JSONObject payload = JSONObject.parseObject(new String(java.util.Base64.getDecoder().decode(decodedJWT.getPayload()));    }    private PublicKey getPublicKeyByX5c(String x5c) throws CertificateException {        byte[] x5c0Bytes = java.util.Base64.getDecoder().decode(x5c);        CertificateFactory fact = CertificateFactory.getInstance("X.509");        X509Certificate cer = (X509Certificate) fact.generateCertificate(new ByteArrayInputStream(x5c0Bytes));        return cer.getPublicKey();    }

解析的json示例

{  "notificationType": "REFUND",  "notificationUUID": "334d1548-****-4ea9-****-e104731870b9",  "data": {    "appAppleId": 1617026651,    "bundleId": "com.*****",    "bundleVersion": "1",    "environment": "Sandbox",    "signedTransactionInfo": "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..."  },  "version": "2.0",  "signedDate": 1680778196476}

需要注意的是这里的signedTransactionInfo依然是一个jws格式，且字段与主动查询的结果一致，用上面的代码和vo类再解码一次

 DecodedJWT decode = JWT.decode(signedTransactionInfo);            TransactionResponseVO responseVO = JSONObject.parseObject(new String(Base64.getDecoder().decode(decode.getPayload())), TransactionResponseVO.class);