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What This Is

A payment gateway for cryptocurrency. Merchants integrate one API, accept 12 coins, and get automatic payouts at a flat 0.5% fee. Accept crypto. Get paid.

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Supported Coins

All transactions at a flat 0.5% fee. No monthly subscriptions, no hidden charges.

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Payment Flow

graph LR
    A[Customer] -->|selects coin| B[Checkout SDK]
    B -->|creates session| C[MyCryptoCoin API]
    C -->|monitors tx| D[Blockchain]
    D -->|confirmed| E[Merchant Payout]

    style A fill:#161b22,stroke:#8b949e,color:#c9d1d9
    style B fill:#161b22,stroke:#F7931A,color:#F7931A
    style C fill:#161b22,stroke:#58A6FF,color:#58A6FF
    style D fill:#161b22,stroke:#00D395,color:#00D395
    style E fill:#161b22,stroke:#FFD700,color:#FFD700

Loading

Real-time WebSocket events fire at every stage.

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Features

Category	What You Get
Payments	Multi-chain processing, real-time exchange rates, QR codes, checkout sessions, discount codes, invoices
Dashboard	Transaction history, balances, withdrawal management, API keys, webhook config, analytics
Admin Panel	Merchant oversight, system analytics, transaction monitoring, fee management
Checkout SDK	Embeddable widget, hosted checkout pages, white-label support
WordPress	WooCommerce gateway, automatic order status sync, zero-code setup
Real-Time	WebSocket (Socket.IO) for payment confirmations, status updates, live feeds
Payouts	Automated withdrawals, configurable schedules, multi-currency settlement
Notifications	Email via Nodemailer, WhatsApp alerts via Baileys
API	REST with OpenAPI 3.0, rate limiting, Zod validation, comprehensive error handling

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Monorepo Structure

mycryptocoin/
├── backend/                 Node.js + Express + TypeScript API          :4000
├── dashboard/               Next.js 14 merchant dashboard               :3000
├── admin/                   Next.js 14 admin panel                      :3001
├── website/                 Next.js 14 marketing site                   :3002
├── docs-site/               Next.js documentation site
├── shared/                  Shared TypeScript types & constants
├── wordpress-plugin/        WooCommerce payment gateway (PHP)
├── docs/
│   ├── api/                 Endpoint docs + OpenAPI spec
│   └── guides/              Integration, SDK, WordPress, Shopify
├── nginx/                   Reverse proxy & SSL termination
├── scripts/                 Deployment & server setup
├── marketing/               Brand assets, pitch deck, emails
├── docker-compose.yml       Development environment
└── docker-compose.prod.yml  Production (3 replicas, PG replication, SSL)

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Quick Start

git clone https://github.com/darshjme/mycryptocoin.git
cd mycryptocoin

# Configure
cp .env.example .env.production

# Deploy full stack
docker compose -f docker-compose.prod.yml up -d

# Run migrations
docker compose -f docker-compose.prod.yml exec backend npx prisma migrate deploy

Production stack: 3 backend replicas with rolling updates, PostgreSQL primary + replica with WAL streaming, Redis with AOF persistence, Nginx with Let's Encrypt SSL.

Manual Setup

git clone https://github.com/darshjme/mycryptocoin.git
cd mycryptocoin

docker compose up -d          # PostgreSQL + Redis
npm install                   # all workspaces
npm run db:generate           # Prisma client
npm run db:migrate            # run migrations
npm run db:seed               # sample data (optional)

# Start services
npm run dev:backend           # API on :4000
npm run dev:dashboard         # Dashboard on :3000
npm run dev:admin             # Admin on :3001
npm run dev:website           # Marketing on :3002

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API Reference

Full docs in docs/ with an OpenAPI 3.0 spec.

Method	Endpoint	Description
POST	/api/v1/payments	Create a payment
GET	/api/v1/payments/:id	Get payment status
POST	/api/v1/checkout/sessions	Create checkout session
POST	/api/v1/webhooks	Configure webhooks
POST	/api/v1/withdrawals	Request withdrawal
GET	/api/v1/wallets	List merchant wallets
GET	/api/v1/exchange-rates	Current rates
POST	/api/v1/invoices	Create invoice
POST	/api/v1/refunds	Issue refund
POST	/api/v1/discount-codes	Create discount code

Create a Payment

curl -X POST https://mycrypto.co.in/api/v1/payments \
  -H "X-API-Key: your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "amount": "100.00",
    "currency": "USDT",
    "description": "Order #1234"
  }'

Create a Checkout Session

curl -X POST https://mycrypto.co.in/api/v1/checkout/sessions \
  -H "X-API-Key: your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "amount": "49.99",
    "currency": "ETH",
    "success_url": "https://yoursite.com/success",
    "cancel_url": "https://yoursite.com/cancel"
  }'

Check Payment Status

curl https://mycrypto.co.in/api/v1/payments/pay_abc123 \
  -H "X-API-Key: your_api_key"

WebSocket Events

import { io } from "socket.io-client";

const socket = io("wss://mycrypto.co.in", {
  auth: { apiKey: "your_api_key" }
});

socket.on("payment:confirmed", (data) => {
  console.log("Payment confirmed:", data.paymentId);
});

socket.on("payment:failed", (data) => {
  console.log("Payment failed:", data.reason);
});

All requests require a merchant API key in the X-API-Key header.

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Security

Passed a 13-category penetration test. Here is what is covered:

Category	Mitigation
SSRF	Strict URL validation, outbound request allowlisting
Timing Attacks	Constant-time comparison for keys, tokens, signatures
Webhook Auth	HMAC-SHA256 signature verification on all inbound webhooks
WebSocket Auth	Token-based connection auth with per-event permission checks
Race Conditions	Redis distributed locking on payment state transitions
Double-Credit	Idempotency keys + atomic database transactions
Double-Refund	State machine enforcement with pessimistic locking
Prisma Leak	Singleton pattern, connection pooling, graceful shutdown
Rate Limiting	Tiered per-endpoint limits, Redis-backed sliding windows
Input Validation	Zod schemas on every request, strict type coercion
Headers / CORS	Helmet security headers, configurable CORS policies
Container	Non-root appuser (UID 1001) in production
Secrets	Environment-based config, nothing hardcoded in code or images

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WordPress / WooCommerce

Native WooCommerce payment gateway. Zero-code integration.

wordpress-plugin/
└── mycryptocoin-gateway/
    ├── mycryptocoin-gateway.php    Main plugin file
    ├── includes/                   Gateway class, API client
    ├── templates/                  Checkout & thank-you pages
    ├── assets/                     Frontend assets
    └── languages/                  i18n translations

Upload mycryptocoin-gateway to wp-content/plugins/, configure your API key under WooCommerce > Settings > Payments. Full guide: WordPress Setup.

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Tech Stack

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Contributing

1. Fork the repository
2. Create your feature branch: git checkout -b feature/my-feature
3. Install dependencies: npm install
4. Start dev environment: docker compose up -d && npm run dev:backend
5. Commit your changes: git commit -m 'feat: add my feature'
6. Push to the branch: git push origin feature/my-feature
7. Open a Pull Request

Bug reports and feature requests welcome via GitHub Issues.

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License

MIT License. See LICENSE for details.

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darshj.me