Python SDK for WeChat XPay (Virtual Payment) server-side APIs
Project description
微信小程序虚拟支付 Python SDK
微信小程序虚拟支付服务端 API 的 Python SDK。
注意:本项目是 微信小程序虚拟支付 的后端 Python SDK。如果你需要的是 微信支付 v3 API 的 后端 Python SDK,请使用 wechatpayv3:
pip install wechatpayv3
欢迎微信支付开发者扫码进 QQ 群(群号:973102221)讨论,欢迎提交代码,欢迎star、follow、fork:
特性
- ✅ 同步与异步 - 同时支持同步和异步操作
- ✅ 类型提示 - 完整的类型注解支持
- ✅ HTTP/2 - 基于 httpx,支持 HTTP/2
- ✅ Webhook 解析 - 处理微信推送通知
- ✅ 错误处理 - 完善的异常层次结构和错误码
- ✅ 日志支持 - 可选的日志记录功能,便于调试
安装
pip install wechat-xpay
快速开始
同步客户端
from wechat_xpay import XPayClient
# 使用上下文管理器(推荐)
with XPayClient(
app_id="你的_app_id",
app_key="你的_app_key",
env=0, # 0=沙箱环境,1=生产环境
) as client:
# access_token 和 session_key 在每次调用 API 时传入,因为它们都会定期过期
balance = client.query_user_balance(
openid="用户_openid",
access_token="你的_access_token",
session_key="用户_session_key",
)
print(f"余额: {balance.balance}")
print(f"赠送余额: {balance.present_balance}")
异步客户端
import asyncio
from wechat_xpay import XPayAsyncClient
async def main():
# 使用异步上下文管理器(推荐)
async with XPayAsyncClient(
app_id="你的_app_id",
app_key="你的_app_key",
env=0,
) as client:
balance = await client.query_user_balance(
openid="用户_openid",
access_token="你的_access_token",
session_key="用户_session_key",
)
print(f"余额: {balance.balance}")
print(f"赠送余额: {balance.present_balance}")
asyncio.run(main())
API 覆盖
- 用户代币管理 (query_user_balance, currency_pay, cancel_currency_pay, present_currency)
- 订单管理 (query_order, refund_order)
- 提现 (create_withdraw_order, query_withdraw_order, query_biz_balance)
- 发货通知 (notify_provide_goods)
- 广告金 (query_transfer_account, query_adver_funds, create_funds_bill, query_funds_bill, query_recover_bill, download_adverfunds_order, bind_transfer_account)
- 道具管理 (start_upload_goods, query_upload_goods, start_publish_goods, query_publish_goods)
- 投诉管理 (get_complaint_list, get_complaint_detail, response_complaint, complete_complaint, get_negotiation_history)
- 文件上传 (upload_vp_file, get_upload_file_sign)
- 账单下载 (download_bill)
- Webhook 解析 (道具发货通知、代币支付通知、退款通知、用户投诉通知)
共计 29 个 API 端点,已全部实现。
使用示例
同步使用
from wechat_xpay import XPayClient
with XPayClient(
app_id="wx1234567890",
app_key="你的_app_key",
env=0,
) as client:
# 查询用户余额
balance = client.query_user_balance(
openid="用户_openid",
access_token="你的_access_token",
session_key="用户_session_key",
)
print(f"余额: {balance.balance}")
print(f"赠送余额: {balance.present_balance}")
# 处理支付
result = client.currency_pay(
openid="用户_openid",
access_token="你的_access_token",
session_key="用户_session_key",
order_id="订单_123",
amount=100, # 代币数量
payitem="商品描述",
)
print(f"订单 ID: {result.order_id}")
# 退款
result = client.refund_order(
openid="用户_openid",
access_token="你的_access_token",
session_key="用户_session_key",
refund_order_id="退款_123",
left_fee=1000,
refund_fee=500,
refund_reason="1", # 商品问题
req_from="1", # 人工
order_id="原订单_id",
)
print(f"退款订单 ID: {result.refund_order_id}")
异步使用
import asyncio
from wechat_xpay import XPayAsyncClient
async def main():
async with XPayAsyncClient(
app_id="wx1234567890",
app_key="你的_app_key",
env=0,
) as client:
# 查询用户余额
balance = await client.query_user_balance(
openid="用户_openid",
access_token="你的_access_token",
session_key="用户_session_key",
)
print(f"余额: {balance.balance}")
# 并发处理多个支付(使用不同的 access_token / session_key)
tasks = [
client.currency_pay(
openid=f"用户_{i}",
access_token="你的_access_token",
session_key=f"session_key_{i}", # 每个用户有自己的 session_key
order_id=f"订单_{i}",
amount=100,
payitem=f"商品_{i}",
)
for i in range(3)
]
results = await asyncio.gather(*tasks)
for result in results:
print(f"订单 ID: {result.order_id}")
asyncio.run(main())
处理 Webhook
from wechat_xpay.webhook import WebhookParser
parser = WebhookParser()
# 解析 JSON 负载
notification = parser.parse({
"Event": "xpay_goods_deliver_notify",
"OpenId": "用户_openid",
"OutTradeNo": "订单_123",
# ... 其他字段
})
print(f"事件类型: {notification.event}")
print(f"用户 OpenID: {notification.open_id}")
# 返回成功响应给微信
response = parser.success_response()
错误处理
from wechat_xpay import XPayClient
from wechat_xpay.exceptions import XPayAPIError, ERR_SESSION_KEY_EXPIRED
client = XPayClient(...)
try:
balance = client.query_user_balance(
openid="用户_openid",
access_token="你的_access_token",
session_key="用户_session_key",
)
except XPayAPIError as e:
if e.errcode == ERR_SESSION_KEY_EXPIRED:
print("会话已过期,请重新登录")
# 重新授权用户获取新的 session_key
else:
print(f"API 错误: {e.errcode} - {e.errmsg}")
客户端生命周期管理
同步客户端
# 方式 1:上下文管理器(自动关闭)
with XPayClient(...) as client:
result = client.query_user_balance(...)
# 方式 2:手动关闭
client = XPayClient(...)
try:
result = client.query_user_balance(...)
finally:
client.close()
异步客户端
# 方式 1:异步上下文管理器(自动关闭)
async with XPayAsyncClient(...) as client:
result = await client.query_user_balance(...)
# 方式 2:手动关闭
client = XPayAsyncClient(...)
try:
result = await client.query_user_balance(...)
finally:
await client.close()
日志功能
SDK 支持可选的日志记录功能,可以记录所有 API 请求和响应信息,便于开发调试。
启用日志
import logging
from wechat_xpay import XPayClient
# 配置日志记录器
logger = logging.getLogger("wechat_xpay")
logger.setLevel(logging.DEBUG)
# 添加控制台处理器
console_handler = logging.StreamHandler()
console_handler.setLevel(logging.DEBUG)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
console_handler.setFormatter(formatter)
logger.addHandler(console_handler)
# 添加文件处理器(可选)
file_handler = logging.FileHandler("xpay.log", encoding="utf-8")
file_handler.setLevel(logging.DEBUG)
file_handler.setFormatter(formatter)
logger.addHandler(file_handler)
# 传入 logger 参数
with XPayClient(
app_id="wx1234567890",
app_key="your_app_key",
env=0,
logger=logger, # 启用日志
) as client:
balance = client.query_user_balance(
openid="user_openid",
access_token="your_access_token",
session_key="user_session_key",
)
日志内容
启用日志后,SDK 会记录:
- 请求信息:API 端点、URL、请求参数(不包含敏感签名信息)
- 响应信息:成功响应的数据
- 错误信息:API 错误码和错误消息
日志级别:
DEBUG:记录所有请求和响应详情ERROR:仅记录 API 错误
异步客户端日志
import logging
from wechat_xpay import XPayAsyncClient
logger = logging.getLogger("wechat_xpay")
logger.setLevel(logging.DEBUG)
handler = logging.StreamHandler()
handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))
logger.addHandler(handler)
async with XPayAsyncClient(
app_id="wx1234567890",
app_key="your_app_key",
env=0,
logger=logger,
) as client:
balance = await client.query_user_balance(
openid="user_openid",
access_token="your_access_token",
session_key="user_session_key",
)
不使用日志
如果不传入 logger 参数,SDK 不会记录任何日志(默认行为):
# 不传入 logger,不会记录日志
with XPayClient(
app_id="wx1234567890",
app_key="your_app_key",
env=0,
) as client:
balance = client.query_user_balance(
openid="user_openid",
access_token="your_access_token",
session_key="user_session_key",
)
认证
SDK 自动处理请求认证,所有签名通过 URL 查询参数传递:
- access_token: 接口调用凭证,通过
auth.getAccessToken获取,每次 API 调用时传入 - pay_sig: 使用 AppKey 的 HMAC-SHA256 签名,所有接口都需要,SDK 自动计算
- signature: 使用 session_key 的 HMAC-SHA256 用户态签名,仅
query_user_balance和currency_pay接口需要,SDK 自动判断并计算
URL 格式示例:
https://api.weixin.qq.com/xpay/{endpoint}?access_token=xxx&pay_sig=xxx
https://api.weixin.qq.com/xpay/{endpoint}?access_token=xxx&pay_sig=xxx&signature=xxx
签名工具函数
用于计算前端 wx.requestVirtualPayment 的 paySig 和 signature 参数,可直接导入签名函数:
from wechat_xpay import calc_pay_sig, calc_signature
# 计算 pay_sig(支付签名)
# uri:
# 前端 wx.requestVirtualPayment 固定填 "requestVirtualPayment"
pay_sig = calc_pay_sig(
uri="requestVirtualPayment",
signData='{"offerId":"123","buyQuantity":1,"env":0,"currencyType":"CNY","productId":"testproductId","goodsPrice":10,"outTradeNo":"xxxxxx","attach":"testdata"}',
appkey="你的_app_key",
)
# 计算 signature(用户态签名)
signature = calc_signature(
signData='{"offerId":"123","buyQuantity":1,"env":0,"currencyType":"CNY","productId":"testproductId","goodsPrice":10,"outTradeNo":"xxxxxx","attach":"testdata"}',
session_key="用户的_session_key",
)
注意:
signData必须和前端调用wx.requestVirtualPayment传入的signData完全一致。
环境
env=0: 生产环境env=1: 沙箱环境(用于测试)
文档
查看 docs/plans/ 目录了解实现细节和 API 规范。
许可证
MIT
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