生成订阅报价的签名-Xcode-Swift [英] Generating a Signature for Subscription Offers - Xcode - Swift

问题描述

我想问问是否有人已经为inapp-subscription(自动续订)实施了新的报价，如果可能的话，创建服务器端系统以使用php的p8密钥创建此签名的难度.我在Apple文档中找到了这个，我不确定是否理解: https://developer.apple.com/documentation/storekit/in-app_purchase/generation_a_signature_for_subscription_offers

I wanted to ask if someone has already implemented the new Offers for the inapp-subscription (auto renewal), the difficulty in creating server-side the system to create this signature using the p8 key with php if possible. I found this on the Apple documentation, I'm not sure understanding it: https://developer.apple.com/documentation/storekit/in-app_purchase/generating_a_signature_for_subscription_offers

推荐答案

以下是RevenueCat的演练:

Here's a walkthrough from RevenueCat: iOS Subscription Offers

帖子包含更多细节，但签名生成为:

The post contains much more detail, but the signature generation is:

import json
import uuid
import time
import hashlib
import base64

from ecdsa import SigningKey
from ecdsa.util import sigencode_der

bundle_id = 'com.myapp'
key_id = 'XWSXTGQVX2'
product = 'com.myapp.product.a'
offer = 'REFERENCE_CODE' # This is the code set in ASC
application_username = 'user_name' # Should be the same you use when
                                   # making purchases
nonce = uuid.uuid4()
timestamp = int(round(time.time() * 1000))

payload = '\u2063'.join([bundle_id, 
                         key_id, 
                         product, 
                         offer, 
                         application_username, 
                         str(nonce), # Should be lower case
                         str(timestamp)])

# Read the key file
with open('cert.der', 'rb') as myfile:
  der = myfile.read()

signing_key = SigningKey.from_der(der)

signature = signing_key.sign(payload.encode('utf-8'), 
                             hashfunc=hashlib.sha256, 
                             sigencode=sigencode_der)
encoded_signature = base64.b64encode(signature)

print(str(encoded_signature, 'utf-8'), str(nonce), str(timestamp), key_id)

这仅仅是概念的证明.您可能希望在服务器上使用它，并且可能具有一些逻辑，对于给定的用户，确定所请求的报价是否合适.

This is just a proof of concept. You will want this on your server and perhaps have some logic to determine, for a given user, if the requested offer is appropriate.

生成签名后，随机数和时间戳将它们连同key_id一起发送回您的应用中，您可以在其中创建SKPaymentDiscount.

Once you’ve generated the signature, nonce and timestamp send these along with the key_id back to your app where you can create an SKPaymentDiscount.

免责声明:我在RevenueCat工作.我们使用我们的SDK开箱即用地支持订阅优惠，无需代码签名: 查看全文