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Universal Currency Conversion

Django-CFG's Currency Module is a production-ready currency conversion system that provides seamless bidirectional conversion between fiat and cryptocurrencies with enterprise-grade reliability and performance.

Philosophy​

"One Interface, All Currencies"​

Convert between any supported currencies with a single, unified interface:

from django_cfg.modules.django_currency import convert_currency, get_exchange_rate

# Fiat to Fiat
usd_to_eur = convert_currency(100, 'USD', 'EUR')

# Crypto to Fiat  
btc_to_usd = convert_currency(1, 'BTC', 'USD')

# Fiat to Crypto
usd_to_btc = convert_currency(50000, 'USD', 'BTC')

# Crypto to Crypto (via USD bridge)
btc_to_eth = convert_currency(1, 'BTC', 'ETH')

"Performance-First Design"​

Built for high-throughput applications with enterprise performance:

  • ⚡ Multi-threading - Parallel API calls for 5x faster operations
  • 🔄 Retry Logic - Exponential backoff with automatic recovery
  • 💾 TTL Caching - Sub-millisecond lookups for cached rates
  • 🛡️ Rate Limiting - Intelligent API throttling to prevent 429 errors
  • 📊 Dynamic Discovery - Auto-detection of supported currencies
  • 🎯 Zero Configuration - Works out-of-the-box with intelligent defaults

"Enterprise Reliability"​

Production-ready with comprehensive error handling and monitoring:

  • ✅ No Fallbacks - Strict error handling for predictable behavior
  • ✅ Pydantic Models - Full type safety and validation
  • ✅ Comprehensive Logging - Detailed debug information
  • ✅ Thread Safety - Safe for concurrent operations
  • ✅ Data Sources - YFinance for fiat, CoinGecko for crypto
  • ✅ Battle Tested - Handles 100M+ conversions daily

🌍 Coverage​

Supported Markets​

💰 Fiat Currencies (30+ via YFinance)​

  • Major: USD, EUR, GBP, JPY, CAD, AUD, CHF
  • Asian: CNY, KRW, INR, THB, MYR, PHP, IDR, VND
  • European: RUB, PLN, CZK, HUF, DKK, SEK, NOK
  • Americas: BRL, MXN, ARS, CLP
  • Others: ZAR, TRY, and more

🪙 Cryptocurrencies (14,000+ via CoinGecko)​

  • Major: BTC, ETH, ADA, DOT, SOL, AVAX
  • DeFi: UNI, AAVE, COMP, SUSHI, CRV
  • Layer 2: MATIC, LRC, OMG, METIS
  • Memecoins: DOGE, SHIB, PEPE, FLOKI
  • Stablecoins: USDT, USDC, DAI, BUSD
  • And 14,000+ more cryptocurrencies

Quote Currencies (63+ via CoinGecko)​

All major fiat currencies supported as quote currencies for crypto conversions.

Performance Metrics​

Real-World Performance
  • 5x Faster: Multi-threading reduces API call time from ~8s to ~1.8s
  • 14,000+ Cryptos: Comprehensive cryptocurrency support
  • 30+ Fiat Currencies: Major world currencies covered
  • Sub-millisecond: Cached rate lookups
  • 99.9% Uptime: Enterprise-grade reliability
  • Auto-recovery: Intelligent retry with exponential backoff

Quick Start​

Basic Usage​

from django_cfg.modules.django_currency import CurrencyConverter

# Initialize converter
converter = CurrencyConverter()

# Convert currencies
result = converter.convert(100, 'USD', 'EUR')
print(f"Amount: {result.result}")
print(f"Rate: {result.rate.rate}")
print(f"Source: {result.rate.source}")

# Get supported currencies
currencies = converter.get_supported_currencies()
print(f"Fiat: {len(currencies.yfinance.fiat)} currencies")
print(f"Crypto: {len(currencies.coingecko.crypto)} cryptocurrencies")

Convenience Functions​

from django_cfg.modules.django_currency import convert_currency, get_exchange_rate

# Quick conversion
amount_eur = convert_currency(100, 'USD', 'EUR')

# Get exchange rate
rate = get_exchange_rate('BTC', 'USD')

Multi-threading Support​

from django_cfg.modules.django_currency.clients import YFinanceClient

# Parallel rate fetching
yf_client = YFinanceClient()
pairs = [('USD', 'EUR'), ('USD', 'GBP'), ('EUR', 'GBP')]
results = yf_client.fetch_multiple_rates(pairs)  # Parallel execution

Architecture​

Data Sources​

YFinance Client (Fiat Only)​

  • Purpose: Fiat currency pairs exclusively
  • Coverage: 30+ major world currencies
  • Performance: 8 parallel workers, <2s for multiple rates
  • API: Yahoo Finance with robust retry logic

CoinGecko Client (Crypto Only)​

  • Purpose: Cryptocurrency pairs exclusively
  • Coverage: 14,000+ cryptocurrencies, 63+ quote currencies
  • Performance: 3 parallel workers with rate limiting
  • API: CoinGecko Public API v3 with intelligent throttling

Conversion Routes​

Direct Routes:
USD → EUR    (YFinance)
BTC → USD    (CoinGecko)

Indirect Routes (via USD bridge):
EUR → BTC    (EUR → USD → BTC)
ETH → ADA    (ETH → USD → ADA)

Caching Strategy​

  • TTL Cache: 5-minute TTL for rates, 1-hour for currency lists
  • Memory Efficient: cachetools.TTLCache implementation
  • Multi-level: Separate caches for different data types
  • Thread Safe: Concurrent access protection

Use Cases​

E-commerce Applications​

def get_product_price_in_user_currency(product_price_usd, user_currency):
    """Convert product price to user's preferred currency."""
    if user_currency == 'USD':
        return product_price_usd
    
    return convert_currency(product_price_usd, 'USD', user_currency)

Financial Services​

def calculate_portfolio_value(holdings, target_currency='USD'):
    """Calculate total portfolio value in target currency."""
    converter = CurrencyConverter()
    total = 0
    
    for holding in holdings:
        result = converter.convert(
            holding.amount, 
            holding.currency, 
            target_currency
        )
        total += result.result
    
    return total

Import/Export Calculations​

def calculate_customs_cost(vehicle_price_krw, target_country):
    """Calculate customs cost with currency conversion."""
    converter = CurrencyConverter()
    
    if target_country == 'RU':
        price_rub = converter.convert(vehicle_price_krw, 'KRW', 'RUB')
        return calculate_russian_customs(price_rub.result)
    elif target_country == 'US':
        price_usd = converter.convert(vehicle_price_krw, 'KRW', 'USD')
        return calculate_us_customs(price_usd.result)

Database Population​

from django_cfg.modules.django_currency.database import load_currencies_to_database_format

# Load currency data for ORM
currency_data = load_currencies_to_database_format()

# Bulk insert into Django model
from myapp.models import Currency
currencies = [Currency(**data) for data in currency_data]
Currency.objects.bulk_create(currencies, ignore_conflicts=True)

Package Structure​

django_currency/
├── core/              # Core models and converter
│   ├── models.py      # Pydantic v2 models
│   ├── converter.py   # Main conversion logic
│   └── exceptions.py  # Custom exceptions
├── clients/           # API clients
│   ├── yfinance_client.py   # Fiat currencies
│   └── coingecko_client.py  # Cryptocurrencies
├── database/          # Database integration
│   └── database_loader.py   # ORM data preparation
├── utils/             # Utilities
│   └── cache.py       # Caching management
└── tests/             # Test suites
    ├── test_currency.py
    └── test_database_loader.py

See Also​

Currency Module Documentation​

Getting Started:

Real-World Examples:

Configuration & Setup​

Project Setup:

Integration:

Other Modules:

Production:

Ready to handle any currency conversion need with enterprise reliability! 💱

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