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Epusdt 商户支付 Python SDK,支持同步/异步客户端、GMPay、EPay 兼容接入与回调验签

Project description

epusdt Python SDK

PyPI version Python versions CI License

适用于 GMWalletApp/epusdt 商户公开支付接口的 Python SDK,提供同步与异步两套客户端,覆盖 GMPay 下单、EPay submit.php 兼容接入、订单查询、回调验签和收款二维码生成。

当前版本只封装商户公开支付能力,不包含后台管理接口。

相关链接

核心能力

  • GMPay 创建订单
  • 支付配置查询
  • 收银台订单查询
  • 支付状态查询
  • 切换网络 / 币种
  • 手动提交交易哈希补单
  • EPay submit.php 兼容接入
  • GMPay / EPay 回调验签
  • 订单二维码生成
  • 官方 status_code 业务错误码映射
  • Django / Flask / FastAPI 接入示例

官方支持矩阵

以下内容依据 GMWalletApp/epusdt 当前官方源码中的默认链配置、默认币种种子和支付监听 / 校验逻辑整理,不以单个网关实例配置为准。

默认启用网络:

  • Tron
  • Ethereum
  • Solana
  • BSC
  • Polygon
  • Plasma
  • TON
  • Aptos

官方默认内置币种:

  • TronUSDTTRX
  • EthereumUSDTUSDC
  • SolanaUSDTUSDCSOL
  • BSCUSDTUSDC
  • PolygonUSDTUSDCUSDC.e
  • PlasmaUSDT
  • TONTONUSDT
  • AptosUSDCUSDT

补充说明:

  • 官方支持按网络新增自定义代币;只要后台已经配置,SDK 可以直接传字符串,例如 token="MOVEUSD"
  • GRAM 当前不属于官方默认支持币种,官方测试中会返回 SupportedAssetNotFound
  • 本 README 不宣称 ArbitrumBaseX-Layer、原生 ETH、原生 BNB 已支持,因为这次未在官方当前源码中确认到对应公开支付实现。

客户端选择

  • EpusdtClient:适合同步 Web 项目、普通脚本、管理后台任务
  • AsyncEpusdtClient:适合 FastAPI、异步任务队列、高并发接口服务

安装

直接安装:

pip install epusdt

需要二维码功能:

pip install epusdt[qrcode]

升级到最新版:

pip install --upgrade epusdt

内置枚举

SDK 内置了一组和官方默认支持矩阵对应的常用枚举:

  • NetworkTRONSOLANAETHEREUMBSCPOLYGONPLASMATONAPTOS
  • TokenUSDTUSDCUSDC_ETRXSOLTON

如果你的网关后台新增了自定义代币,不需要等待 SDK 发版,直接传原始字符串即可。

快速开始

同步客户端

from epusdt import EpusdtClient, Network, Token

with EpusdtClient(
    base_url="https://pay.example.com",
    pid="1000",
    secret_key="epusdt_secret_key",
) as client:
    order = client.create_order(
        order_id="ORD202606240001",
        amount=100,
        currency="cny",
        token=Token.USDT,
        network=Network.TRON,
        notify_url="https://merchant.example.com/notify",
        redirect_url="https://merchant.example.com/return",
        name="会员充值",
    )

    print(order.trade_id)
    print(order.payment_url)
    print(order.actual_amount)

异步客户端

import asyncio

from epusdt import AsyncEpusdtClient, Network, Token


async def main() -> None:
    async with AsyncEpusdtClient(
        base_url="https://pay.example.com",
        pid="1000",
        secret_key="epusdt_secret_key",
    ) as client:
        order = await client.create_order(
            order_id="ORD202606240099",
            amount=100,
            currency="cny",
            token=Token.USDT,
            network=Network.TRON,
            notify_url="https://merchant.example.com/notify",
            redirect_url="https://merchant.example.com/return",
            name="会员充值",
        )

        print(order.trade_id)
        print(order.payment_url)


asyncio.run(main())

常见用法

以下示例默认已经初始化好 client。如果你使用异步客户端,对应方法前加 await 即可。

查询支付配置

config = client.get_public_config()

for asset in config.supported_assets:
    print(asset.network, asset.tokens)

创建待选网络订单

placeholder = client.create_order(
    order_id="ORD202606240002",
    amount=88.5,
    currency="cny",
    notify_url="https://merchant.example.com/notify",
)

selected = client.switch_network(
    trade_id=placeholder.trade_id,
    token="USDT",
    network="solana",
)

print(selected.trade_id)
print(selected.receive_address)

查询订单和支付状态

checkout = client.get_checkout("20260523171652123456001")
status = client.check_status("20260523171652123456001")

print(checkout.payment_type)
print(status.status)

EPay 兼容接入

构造跳转地址:

url = client.build_epay_redirect_url(
    out_trade_no="ORD202606240003",
    money=100,
    notify_url="https://merchant.example.com/notify",
    return_url="https://merchant.example.com/return",
    name="会员充值",
)

print(url)

直接请求网关并获取收银台地址:

redirect = client.create_epay_order(
    out_trade_no="ORD202606240003",
    money=100,
    notify_url="https://merchant.example.com/notify",
    return_url="https://merchant.example.com/return",
)

print(redirect.checkout_url)

手动补单

result = client.submit_tx_hash(
    trade_id="20260523171652123456001",
    block_transaction_id="0xabc123",
)

print(result.status)
print(result.block_transaction_id)

回调验签

GMPay JSON 回调:

payload = {
    "pid": "1000",
    "trade_id": "20260523171652123456001",
    "order_id": "ORD202605230001",
    "amount": 100,
    "actual_amount": 14.29,
    "receive_address": "TTestTronAddress001",
    "token": "USDT",
    "block_transaction_id": "0xabc123",
    "status": 2,
    "signature": "a1b2c3",
}

callback = client.parse_gmpay_callback(payload)
print(callback.trade_id)

EPay GET 回调:

params = {
    "pid": "1000",
    "trade_no": "20260523171652123456001",
    "out_trade_no": "ORD202605230001",
    "type": "alipay",
    "name": "会员充值",
    "money": "100.0000",
    "trade_status": "TRADE_SUCCESS",
    "sign": "a1b2c3",
    "sign_type": "MD5",
}

callback = client.parse_epay_callback(params)
print(callback.out_trade_no)

业务错误码捕获

SDK 已按官方 status_code 映射常见业务异常,商户侧可以直接按具体错误类型处理:

from epusdt import (
    EpusdtClient,
    InvalidNotifyURLError,
    OrderExistsError,
    OrderNotFoundError,
)

client = EpusdtClient(
    base_url="https://pay.example.com",
    pid="1000",
    secret_key="epusdt_secret_key",
)

try:
    client.create_order(
        order_id="ORD202606240003",
        amount=100,
        currency="cny",
        notify_url="https://merchant.example.com/notify",
    )
except OrderExistsError:
    print("订单号重复")
except InvalidNotifyURLError:
    print("回调地址不合法")
except OrderNotFoundError:
    print("订单不存在")

生成二维码

order = client.get_checkout("20260523171652123456001")

image = order.generate_qrcode()
image.save("epusdt-payment.png")

Web 项目示例

  • examples/flask_example.py:同步 Flask 接入示例
  • examples/fastapi_example.py:异步 FastAPI 接入示例
  • examples/django_example.py:Django 下单、GMPay 回调、EPay 回调完整模板
  • examples/live_gateway_check.py:真实网关联调脚本,可串行检查配置、下单、切网和查单

自动化流程

仓库内已提供 GitHub Actions:

  • CI:自动运行多 Python 版本测试、构建和 twine check
  • Release:手动触发发布,自动测试、构建、创建 GitHub Release,并可上传到 PyPI

发布到 PyPI 前,需要在 GitHub 仓库 Secrets and variables / Actions 中配置:

  • PYPI_API_TOKEN

API 一览

  • EpusdtClient(...)
  • AsyncEpusdtClient(...)
  • create_order(...)
  • get_public_config()
  • get_checkout(trade_id)
  • check_status(trade_id)
  • switch_network(trade_id, token, network)
  • submit_tx_hash(trade_id, block_transaction_id)
  • build_epay_params(...)
  • build_epay_redirect_url(...)
  • create_epay_order(...)
  • verify_gmpay_callback(payload)
  • verify_epay_callback(params)
  • parse_gmpay_callback(payload)
  • parse_epay_callback(params)

适用范围

当前版本面向 epusdt 商户公开支付接口,适合以下接入场景:

  • 服务端创建订单
  • 前端收银台支付
  • EPay 兼容接入
  • 支付回调验签
  • Flask / Django 等同步项目
  • FastAPI / 异步任务队列项目

验证情况

  • 单元测试通过
  • 构建通过
  • 干净虚拟环境安装通过
  • 安装后导入通过
  • 二维码功能烟测通过
  • 同步与异步客户端都已覆盖测试

参与开发

本地开发、测试和构建说明见 CONTRIBUTING.md

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