🔧 Automated Currency Scraper & Telegram Bot

Real-time Exchange Rates with Web Scraping & API Integration

Node.js Web Scraping Telegram Bot REST APIs
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🏗️ Architecture Highlights

📊 Data Aggregation: Multi-source scraping with Cheerio + Axios
🔄 Fallback System: Primary/secondary API with automatic failover
⚡ Real-time Processing: Event-driven architecture with 5-min intervals
🪙 Crypto Integration: CoinGecko API for BTC, ETH, BNB, ADA, DOGE
🤖 Bot Framework: node-telegram-bot-api with polling
🛡️ Error Handling: Comprehensive try-catch with graceful degradation
2/7

💡 Technical Challenges Solved

⏱️

Rate Limiting

Managed API limits across multiple sources with intelligent fallback

🔀

Async Patterns

Concurrent data fetching with async/await for optimal performance

💱

Currency Conversion

Cross-rate algorithms for 13+ currency pairs against AFN

🕐

Timezone Handling

Accurate timestamps for Asia/Kabul timezone

🌐

Bilingual Support

RTL message templating for Persian & Pashto

📢

Dual Delivery

Channel broadcasting vs. user commands

3/7

💻 Code Architecture Flow

🌐 Web Scraping
↓
🔄 Data Normalization
↓
💱 Currency Conversion
↓
🛡️ Error Recovery
↓
🤖 Bot API
↓
📝 Message Formatting
↓
📤 Channel/User Delivery
// Fallback Pattern try { return await primaryAPI(); } catch { try { return await backupAPI(); } catch { return await webScraping(); } }
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🛠️ Technology Stack

🟢

Node.js

Runtime Environment

🕸️

Cheerio

Web Scraping

📡

Axios

HTTP Client

🤖

Telegram API

Bot Framework

🔌

REST APIs

Data Sources

⚡

Async/Await

Async Patterns

5/7

📊 Performance Metrics

⚡
<1s
Response Time
✅
99%+
Uptime
💱
13
Forex Pairs
🪙
5
Crypto Pairs
6/7

🚀 Let's Connect!

Open to discussing technical implementation
and similar data pipeline challenges

💼 LinkedIn: [Your Profile]
💻 GitHub: [Your Repo]
📧 Email: [Your Email]
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