{"id":29902074,"url":"https://github.com/saurabhkumardev/crypto-tracker-backend","last_synced_at":"2025-08-01T15:50:04.905Z","repository":{"id":305554720,"uuid":"1021601259","full_name":"SaurabhKumarDev/crypto-tracker-backend","owner":"SaurabhKumarDev","description":null,"archived":false,"fork":false,"pushed_at":"2025-07-20T18:26:06.000Z","size":184,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"main","last_synced_at":"2025-07-20T20:21:52.364Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"JavaScript","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/SaurabhKumarDev.png","metadata":{"files":{"readme":"readme.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null,"zenodo":null}},"created_at":"2025-07-17T16:40:20.000Z","updated_at":"2025-07-20T18:26:10.000Z","dependencies_parsed_at":"2025-07-20T20:32:14.270Z","dependency_job_id":null,"html_url":"https://github.com/SaurabhKumarDev/crypto-tracker-backend","commit_stats":null,"previous_names":["saurabhkumardev/crypto-tracker-backend"],"tags_count":null,"template":false,"template_full_name":null,"purl":"pkg:github/SaurabhKumarDev/crypto-tracker-backend","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/SaurabhKumarDev%2Fcrypto-tracker-backend","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/SaurabhKumarDev%2Fcrypto-tracker-backend/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/SaurabhKumarDev%2Fcrypto-tracker-backend/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/SaurabhKumarDev%2Fcrypto-tracker-backend/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/SaurabhKumarDev","download_url":"https://codeload.github.com/SaurabhKumarDev/crypto-tracker-backend/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/SaurabhKumarDev%2Fcrypto-tracker-backend/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":268255567,"owners_count":24221030,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","status":"online","status_checked_at":"2025-08-01T02:00:08.611Z","response_time":67,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2025-08-01T15:50:03.677Z","updated_at":"2025-08-01T15:50:04.691Z","avatar_url":"https://github.com/SaurabhKumarDev.png","language":"JavaScript","funding_links":[],"categories":[],"sub_categories":[],"readme":"# 🪙 CryptoTracker Backend\n\nThis is the **backend API** for the CryptoTracker application. It fetches, stores, and serves cryptocurrency data using the **CoinGecko API**, **MongoDB**, and **Express.js**. A cron job runs every hour to update current and historical coin data automatically.\n\n---\n\n## 🚀 Tech Stack\n\n- **Node.js**\n- **Express.js**\n- **MongoDB + Mongoose**\n- **CoinGecko API**\n- **Node-Cron** (for scheduled data fetching)\n- **dotenv** (for environment variable management)\n\n---\n\n## 📦 Project Structure\n\n```\ncrypto-tracker-backend/\n├── models/\n│ └── Coin.js\n├── routes/\n│ └── coins.js\n├── services/\n│ ├── coinGeckoService.js\n│ └── cronService.js\n├── .env\n├── index.js\n├── package.json\n├── package-lock.js\n└── readme.md\n```\n\n---\n\n## ⚙️ Setup \u0026 Installation\n\n### 1. Clone the repository\n\n```bash\ngit clone https://github.com/saurabhkumardev/crypto-tracker-backend.git\ncd crypto-tracker-backend\n```\n\n### 2. Install dependencies\n\n```bash\nnpm install\n```\n\n### 3. Configure environment variables\n\n- Create a .env file in the root directory:\n\n```env\nMONGODB_URI=mongodb://localhost:27017/cryptotracker\nPORT=5000\nCLIENT_URL=http://localhost:3000\nNODE_ENV=development\n```\n\n### 4. Run the server\n\n```bash\nnpm run dev\n```\n\n---\n\u003cbr /\u003e\n\n- Server will run at: http://localhost:5000\n\n\u003cbr /\u003e\n\n---\n\n## ⏰ Cron Job – Hourly Coin Data Sync\n\n- A cron job runs every hour to:\n- Fetch top 10 coin data from the CoinGecko API.\n- Update the CurrentCoin collection using upsert.\n- Insert a snapshot into the HistoryCoin collection.\n- Delete historical data older than 30 days.\n\n\n### Cron Job Code:\n\n- Located at: services/cronService.js\n\n```\ncron.schedule(\"0 * * * *\", () =\u003e {\n  this.updateCoinData()\n}, { timezone: \"UTC\" })\n```\n\n- Also runs immediately after server starts (with 5-second delay).\n\n## 📡 External API Used\n- CoinGecko API\n- Base URL: https://api.coingecko.com/api/v3\n- Endpoint Used: /coins/markets?vs_currency=usd\u0026order=market_cap_desc\u0026per_page=10\u0026page=1\n\n\n## 📁 MongoDB Collections\n🔸 CurrentCoin\nStores latest data of top 10 coins (upserted each hour).\n\n🔸 HistoryCoin\nStores hourly snapshots of coin data for tracking trends and charts.\n\n🔌 API Endpoints\n- All routes are prefixed with /api\n\n```\nMethod\t      Endpoint\t            Description\nGET\t          /api/coins\t        Get current coin data\nGET\t          /api/coins/history\tGet historical data by coinId and days\n```\n\n# 🌐 Deployment Links\n🔗 Backend API: https://your-backend.onrender.com/api\n\n🔗 Frontend App: https://your-frontend.vercel.app\n\n## 🧪 Testing the API\n\n- You can test the endpoints using:\n  - Postman\n  - Browser (for GET)\n\n\nExample:\n - curl http://localhost:5000/api/coins\n\n\n\n## 📞 Contact\n\n- 💼 linkedin.com/in/saurabhkumardev\n- 📧 saurabhkumarmehto@gmail.com\n\n\n## DB (History crypto)\n![App Screenshot](./public/mongo.png)\n\n## Cron job (Code)\n![App Screenshot](./public/cron%20job.png)","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsaurabhkumardev%2Fcrypto-tracker-backend","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fsaurabhkumardev%2Fcrypto-tracker-backend","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsaurabhkumardev%2Fcrypto-tracker-backend/lists"}