What it is

Epusdt, also called GM Pay, formerly EPUSDT, is an open-source payment gateway built in Go. It supports private deployment and accepts cryptocurrency payments across multiple blockchain networks and token types. It lives in the open-source e-commerce and crypto payment ecosystem, where businesses, API services, card systems, and self-hosted platforms need a payment layer that connects to their own wallets.

The problem it solves is that many sites want to receive USDT and other crypto payments without a third-party processor taking custody or fees. Epusdt provides an HTTP API, a panel, a checkout, and wallet monitoring so a merchant can assign address and amount combinations, watch on-chain transfers, and confirm payments. Funds go to wallets controlled by the deployer, while the gateway handles matching, callbacks, and merchant-facing interfaces.

Key capabilities

• It supports TRC20, ERC20, Solana, BEP20, Polygon, and Aptos, with USDT, TRX, USDC, ETH, and BNB.
• It runs privately, so the operator connects its own wallet addresses and receives customer transfers directly, not through a third-party processor.
• It can start as a single binary for low-concurrency use, without MySQL or Redis, while supporting an asynchronous queue and multi-wallet polling for higher throughput.
• It supports x86 and ARM systems on Windows, Linux, and Mac, so it can run on servers and desktops.
• It exposes a standardized HTTP API and an Epay-compatible interface, allowing systems to create orders, receive callbacks, and integrate checkout pages.
• It includes a Telegram Bot for payment notifications and quick management or monitoring.

Who uses it and how

• AI distribution platforms such as Sub2API and NewAPI can use it as a crypto payment layer.
• Card issuing systems such as Dujiaoka and Acg Faka can connect it to accept crypto payments for digital goods.
• Proxy panels such as V2Board, XBoard, xiaoV2board, and SSPanel can use it to accept crypto payments for user plans or renewals.
• WordPress, WHMCS, and custom applications can integrate it through payment interfaces or the HTTP API, while the gateway monitors address and amount combinations and sends callbacks.

Getting started

Typical install methods include Docker deployment, the epctl script for Linux binary install, upgrade, status, and initialization, aaPanel deployment, and manual deployment. Integration documentation is at epusdt.com.

When to use it — and when not to

Use it when a project needs self-hosted, multi-chain crypto payment intake and can operate blockchain RPC or API access, wallet management, callbacks, and optional MySQL or Redis. Avoid it when the team wants a fully managed payment provider or does not want to run chain monitoring and merchant infrastructure. The 42 open issues and missing contributor count mean deployers must check maturity and compliance.

Epusdt
├── epctl       Linux 二进制安装与运维脚本
├── src/        项目核心代码
└── wiki/       文档与知识库

工作流程：
1. 客户发起支付，需支付 20.05 USDT
2. 系统在哈希表中查找可用的钱包地址 + 金额组合
3. 若 address_1:20.05 未被占用 -> 锁定该组合（有效期 10 分钟），返回给客户
4. 若已被占用 -> 自动累加 0.0001 尝试下一个金额组合（最多 100 次）
5. 后台线程持续监听所有钱包的入账事件，金额匹配则确认支付成功