Initial commit: Crypto address tracker for Romanian tax calculations

- Bitcoin and Ethereum address tracking
- Identifies first purchase from exchanges
- Interactive CLI mode with historical price lookup links
- Test suite with public addresses
- Documentation for Claude Code

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
2025-10-03 15:35:30 +03:00
commit 51c9202556
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# Python
__pycache__/
*.py[cod]
*$py.class
*.so
.Python
build/
develop-eggs/
dist/
downloads/
eggs/
.eggs/
lib/
lib64/
parts/
sdist/
var/
wheels/
*.egg-info/
.installed.cfg
*.egg
# Virtual environments
venv/
env/
ENV/
.venv
# IDE
.vscode/
.idea/
*.swp
*.swo
*~
# OS
.DS_Store
Thumbs.db
# API keys (if any)
.env
*.key
config.local.json

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# CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
## Project Overview
A Python tool that tracks Bitcoin and Ethereum addresses to identify the first cryptocurrency purchase - essential for Romanian crypto tax calculations. The tool analyzes blockchain transactions backward in time to find when crypto was first acquired from an exchange.
## Architecture
**Single-file application** ([crypto_tracker.py](crypto_tracker.py)) with one main class:
- `CryptoTracker`: Core class handling both BTC and ETH tracking
- `track_bitcoin_address()`: Uses blockchain.info API (no API key required)
- `track_ethereum_address()`: Uses Etherscan API (optional API key)
- `_check_exchange()`: Matches addresses against known exchange wallets
- `_display_bitcoin_results()` / `_display_ethereum_results()`: Formatted output
- `main()`: Interactive CLI entry point
**Data flow**: User address → API fetch → Parse transactions (oldest first) → Identify exchange sources → Display first purchase with date/amount/hash
## Development Commands
### Run interactive mode
```bash
python crypto_tracker.py
```
### Run tests (with public addresses)
```bash
python test_tracker.py
```
### Install dependencies
```bash
pip install -r requirements.txt
# or simply:
pip install requests
```
## Key Implementation Details
**Bitcoin tracking**:
- Uses blockchain.info free API (`https://blockchain.info/rawaddr/{address}`)
- Hardcoded list of known exchange addresses in `known_exchanges` dict
- Processes transactions in reverse chronological order to find oldest first
- Converts satoshi to BTC (÷ 100,000,000)
**Ethereum tracking**:
- Uses Etherscan API (`https://api.etherscan.io/api`)
- Free tier: 5 requests/second without API key
- Converts wei to ETH (÷ 10^18)
- Manual verification required for exchange detection (Etherscan address tags)
**Exchange detection**:
- Bitcoin: Direct address matching against `known_exchanges` dictionary
- Ethereum: Flagged for manual review (addresses should be checked on Etherscan for exchange tags)
## Extending the Codebase
**Adding new exchanges**: Update `known_exchanges` dict in `__init__()` with exchange name as key and list of known wallet addresses as value.
**Adding new blockchains**: Follow the pattern of `track_bitcoin_address()` / `track_ethereum_address()` - create new method, fetch transactions via blockchain API, parse chronologically, identify exchange markers.
**Testing**: [test_tracker.py](test_tracker.py) uses public addresses (Genesis block for BTC, Ethereum Foundation for ETH) to verify API connectivity and parsing logic.
## Important Constraints
- **Read-only operation**: No private keys, no transactions sent
- **Rate limits**: Ethereum API limited to 5 req/sec without key
- **Exchange detection limitations**: Only major exchanges in Bitcoin; Ethereum requires manual verification
- **Not for privacy coins**: Only supports transparent blockchain analysis

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# 🔍 Crypto Address Tracker - Găsește Prima Achiziție
Program Python care urmărește automat adresele de Bitcoin și Ethereum pentru a găsi prima ta achiziție - esențial pentru calculul impozitului pe crypto în România.
## 📋 Ce face programul?
✅ Analizează orice adresă Bitcoin sau Ethereum
✅ Urmărește toate tranzacțiile înapoi în timp
✅ Identifică exchange-uri cunoscute (Binance, Coinbase, Kraken, etc.)
✅ Găsește **prima ta achiziție** cu data exactă
✅ Îți oferă link-uri pentru a verifica prețul istoric
## 🚀 Instalare
### Pas 1: Instalează Python
Dacă nu ai Python instalat:
- Windows: Descarcă de la [python.org](https://www.python.org/downloads/)
- Mac: `brew install python3`
- Linux: `sudo apt install python3 python3-pip`
### Pas 2: Instalează dependențele
```bash
pip install -r requirements.txt
```
SAU simplu:
```bash
pip install requests
```
## 💻 Cum se folosește
### Mod 1: Interactiv (cel mai simplu)
```bash
python crypto_tracker.py
```
Apoi urmează instrucțiunile pe ecran:
1. Alege Bitcoin sau Ethereum
2. Introdu adresa ta de wallet
3. (Pentru Ethereum) Optional: adaugă API key de la Etherscan
### Mod 2: În cod (pentru programatori)
#### Bitcoin
```python
from crypto_tracker import CryptoTracker
tracker = CryptoTracker()
results = tracker.track_bitcoin_address('1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa')
if results['first_purchase']:
print(f"Prima achiziție: {results['first_purchase']['date']}")
print(f"Exchange: {results['exchange_found']}")
```
#### Ethereum
```python
tracker = CryptoTracker()
results = tracker.track_ethereum_address('0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb')
if results['first_purchase']:
print(f"Prima achiziție: {results['first_purchase']['date']}")
```
## 📱 Unde găsești adresa ta de wallet?
### Bitcoin
- **Blockchain.com wallet**: Settings → Addresses
- **Ledger/Trezor**: În aplicația wallet-ului
- **Exchange (Binance, etc)**: Wallet → Deposit → Bitcoin → Vezi adresa
### Ethereum
- **MetaMask**: Click pe numele contului pentru a copia adresa
- **MyEtherWallet**: Se vede în dashboard
- **Exchange**: Wallet → Deposit → Ethereum → Vezi adresa (începe cu 0x)
## 🎯 Ce informații vei primi?
Programul îți arată:
-**Data primei achiziții** (FOARTE IMPORTANT pentru impozit!)
-**Exchange-ul sursă** (Binance, Coinbase, etc.)
-**Suma primită**
-**Hash-ul tranzacției** (pentru verificare)
-**Link direct către blockchain explorer**
-**Link pentru preț istoric**
## 📊 Exemplu de rezultat
```
🔍 Tracking Bitcoin address: 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa
======================================================================
✅ Found 15 transactions
📊 REZULTATE:
======================================================================
🎯 PRIMA ACHIZIȚIE GĂSITĂ!
Exchange: BINANCE
Data: 2021-03-15 14:23:45
Sumă: 0.50000000 BTC
Hash: 3a4b5c6d7e8f9g0h1i2j3k4l5m6n7o8p9q0r1s2t3u4v5w6x7y8z9
🔗 Vezi tranzacția: https://blockchain.com/btc/tx/3a4b5c6d...
💰 Pentru preț istoric, verifică:
https://coinmarketcap.com/currencies/bitcoin/historical-data/
Data: 2021-03-15
```
## 💡 Următorii pași după ce găsești data
1. **Notează data primei achiziții**
2. **Mergi pe CoinMarketCap/CoinGecko** și caută prețul istoric pentru acea dată
3. **Acesta este prețul tău de achiziție** pentru calculul impozitului
4. **Calculează profitul**: Preț vânzare - Preț achiziție = Profit
5. **Impozit = Profit × 10%**
## 🔑 API Key pentru Ethereum (Optional)
Pentru rezultate mai rapide la Ethereum, obține un API key gratuit:
1. Mergi la [etherscan.io/apis](https://etherscan.io/apis)
2. Creează cont gratuit
3. Generează API key
4. Folosește-l când programul te întreabă
**Fără API key**: 5 requests/secundă (suficient pentru majoritatea cazurilor)
**Cu API key**: Rate limit mai mare
## ⚠️ Limitări
- **Bitcoin**: Identifică exchange-uri majore, dar nu toate
- **Ethereum**: Trebuie verificat manual pe Etherscan dacă adresa are tag de exchange
- **Privacy coins** (Monero): Nu pot fi urmărite
- **Mixere/Tumblers**: Greu de urmărit
- **Transfer între wallet-uri proprii**: Trebuie urmărit manual mai departe
## 🛡️ Securitate
**100% Safe**: Programul folosește doar API-uri publice
**Read-only**: Nu are acces la private keys
**Nu trimite date**: Totul rulează local pe calculatorul tău
**Open source**: Poți verifica codul
## 🐛 Probleme comune
### "ModuleNotFoundError: No module named 'requests'"
```bash
pip install requests
```
### "No transactions found"
- Verifică că adresa este corectă
- Unele adrese noi pot să nu aibă istoric încă
### "API rate limit exceeded" (Ethereum)
- Așteaptă 1 minut și încearcă din nou
- SAU obține un API key gratuit de la Etherscan
### Nu găsește exchange-ul
- Programul arată primele tranzacții
- Verifică manual pe blockchain explorer dacă exchange-ul are tag
## 📞 Suport
Dacă întâmpini probleme:
1. Verifică că ai Python 3.7+: `python --version`
2. Verifică că ai instalat `requests`: `pip list | grep requests`
3. Rulează cu debug: `python -v crypto_tracker.py`
## 🎓 Pentru dezvoltatori
### Extensii posibile
- Adaugă suport pentru mai multe blockchain-uri (Solana, Cardano, etc.)
- Integrare cu CoinMarketCap API pentru prețuri istorice automate
- Export către Excel/CSV
- GUI cu Tkinter sau web interface cu Flask
### Structura codului
```
crypto_tracker.py
├── CryptoTracker class
│ ├── track_bitcoin_address() # Analizează Bitcoin
│ ├── track_ethereum_address() # Analizează Ethereum
│ ├── _check_exchange() # Verifică exchange-uri cunoscute
│ └── _display_results() # Afișează rezultate formatate
└── main() # Mod interactiv
```
## 📄 Licență
Free to use, modify, and distribute. Folosește-l responsabil!
## ⭐ Dacă te ajută
Dacă programul te ajută să îți calculezi corect impozitul, share it cu alții care au nevoie! 🚀

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#!/usr/bin/env python3
"""
Crypto Address Tracker - Finds Primary Purchases
Tracks Bitcoin and Ethereum addresses back to first exchange acquisition
"""
import requests
import time
from datetime import datetime
from typing import List, Dict, Optional
class CryptoTracker:
def __init__(self):
# Known exchange addresses (Bitcoin)
self.known_exchanges = {
'binance': ['1NDyJtNTjmwk5xPNhjgAMu4HDHigtobu1s', '34xp4vRoCGJym3xR7yCVPFHoCNxv4Twseo'],
'coinbase': ['3D2oetdNuZUqQHPJmcMDDHYoqkyNVsFk9r', '3Nxwenay9Z8Lc9JBiywExpnEFiLp6Afp8v'],
'kraken': ['3BMEXVx3hL3qFAahnWgQ8buSr89oHWqBHX'],
'bitstamp': ['1Kr6QSydW9bFQG1mXiPNNu6WpJGmUa9i1g']
}
# Known exchange markers (for Ethereum - common patterns)
self.eth_exchange_markers = [
'binance', 'coinbase', 'kraken', 'bitstamp', 'bitfinex',
'okex', 'huobi', 'gemini', 'ftx', 'kucoin'
]
def track_bitcoin_address(self, address: str, max_depth: int = 10) -> Dict:
"""
Track a Bitcoin address back to find primary purchase
Uses blockchain.com API (free, no API key needed)
"""
print(f"\n🔍 Tracking Bitcoin address: {address}")
print("=" * 70)
results = {
'address': address,
'type': 'Bitcoin',
'transactions': [],
'first_purchase': None,
'exchange_found': None
}
try:
# Get address info
url = f"https://blockchain.info/rawaddr/{address}?limit=50"
response = requests.get(url, timeout=10)
response.raise_for_status()
data = response.json()
if 'txs' not in data or len(data['txs']) == 0:
print("❌ No transactions found for this address")
return results
transactions = data['txs']
print(f"✅ Found {len(transactions)} transactions\n")
# Find first incoming transaction
incoming_txs = []
for tx in reversed(transactions): # Start from oldest
# Check if this transaction sent BTC to our address
for output in tx['out']:
if output.get('addr') == address:
tx_date = datetime.fromtimestamp(tx['time'])
tx_info = {
'hash': tx['hash'],
'date': tx_date,
'value': output['value'] / 100000000, # Convert satoshi to BTC
'from_addresses': []
}
# Get source addresses
for inp in tx['inputs']:
if 'prev_out' in inp and 'addr' in inp['prev_out']:
from_addr = inp['prev_out']['addr']
tx_info['from_addresses'].append(from_addr)
# Check if it's a known exchange
exchange = self._check_exchange(from_addr)
if exchange:
tx_info['exchange'] = exchange
if not results['first_purchase']:
results['first_purchase'] = tx_info
results['exchange_found'] = exchange
incoming_txs.append(tx_info)
break
results['transactions'] = incoming_txs
# Display results
self._display_bitcoin_results(results)
except requests.exceptions.RequestException as e:
print(f"❌ Error fetching data: {e}")
except Exception as e:
print(f"❌ Unexpected error: {e}")
return results
def track_ethereum_address(self, address: str, etherscan_api_key: Optional[str] = None) -> Dict:
"""
Track an Ethereum address back to find primary purchase
Free tier: 5 requests/second, no API key needed for basic use
"""
print(f"\n🔍 Tracking Ethereum address: {address}")
print("=" * 70)
results = {
'address': address,
'type': 'Ethereum',
'transactions': [],
'first_purchase': None,
'exchange_found': None
}
try:
# Build API URL
base_url = "https://api.etherscan.io/api"
params = {
'module': 'account',
'action': 'txlist',
'address': address,
'startblock': 0,
'endblock': 99999999,
'page': 1,
'offset': 100,
'sort': 'asc' # Oldest first
}
if etherscan_api_key:
params['apikey'] = etherscan_api_key
response = requests.get(base_url, params=params, timeout=10)
response.raise_for_status()
data = response.json()
if data['status'] != '1' or 'result' not in data:
print("❌ No transactions found or API error")
return results
transactions = data['result']
print(f"✅ Found {len(transactions)} transactions\n")
# Find incoming transactions
incoming_txs = []
for tx in transactions:
# Check if ETH was sent TO our address
if tx['to'].lower() == address.lower() and tx['value'] != '0':
tx_date = datetime.fromtimestamp(int(tx['timeStamp']))
value_eth = int(tx['value']) / 1e18 # Convert wei to ETH
tx_info = {
'hash': tx['hash'],
'date': tx_date,
'value': value_eth,
'from_address': tx['from']
}
# Check for exchange markers in address tags
# Note: In production, you'd check against Etherscan's address tags
# For now, we'll flag it for manual review
incoming_txs.append(tx_info)
if not results['first_purchase']:
results['first_purchase'] = tx_info
results['transactions'] = incoming_txs[:10] # First 10 incoming
# Display results
self._display_ethereum_results(results)
except requests.exceptions.RequestException as e:
print(f"❌ Error fetching data: {e}")
except Exception as e:
print(f"❌ Unexpected error: {e}")
return results
def _check_exchange(self, address: str) -> Optional[str]:
"""Check if address belongs to a known exchange"""
for exchange, addresses in self.known_exchanges.items():
if address in addresses:
return exchange
return None
def _display_bitcoin_results(self, results: Dict):
"""Display Bitcoin tracking results"""
print("\n📊 REZULTATE:")
print("=" * 70)
if results['first_purchase']:
fp = results['first_purchase']
print(f"\n🎯 PRIMA ACHIZIȚIE GĂSITĂ!")
print(f" Exchange: {fp.get('exchange', 'Unknown').upper()}")
print(f" Data: {fp['date'].strftime('%Y-%m-%d %H:%M:%S')}")
print(f" Sumă: {fp['value']:.8f} BTC")
print(f" Hash: {fp['hash']}")
print(f"\n 🔗 Vezi tranzacția: https://blockchain.com/btc/tx/{fp['hash']}")
# Get historical price
print(f"\n 💰 Pentru preț istoric, verifică:")
print(f" https://coinmarketcap.com/currencies/bitcoin/historical-data/")
print(f" Data: {fp['date'].strftime('%Y-%m-%d')}")
else:
print("\n⚠️ Nu am găsit exchange-uri cunoscute")
print(" Primele tranzacții incoming:")
for i, tx in enumerate(results['transactions'][:3], 1):
print(f"\n {i}. Data: {tx['date'].strftime('%Y-%m-%d')}")
print(f" Sumă: {tx['value']:.8f} BTC")
print(f" De la: {tx['from_addresses'][0] if tx['from_addresses'] else 'Unknown'}")
print(f" Hash: {tx['hash'][:16]}...")
def _display_ethereum_results(self, results: Dict):
"""Display Ethereum tracking results"""
print("\n📊 REZULTATE:")
print("=" * 70)
if results['first_purchase']:
fp = results['first_purchase']
print(f"\n🎯 PRIMA TRANZACȚIE INCOMING GĂSITĂ!")
print(f" Data: {fp['date'].strftime('%Y-%m-%d %H:%M:%S')}")
print(f" Sumă: {fp['value']:.6f} ETH")
print(f" De la: {fp['from_address']}")
print(f" Hash: {fp['hash']}")
print(f"\n 🔗 Vezi tranzacția: https://etherscan.io/tx/{fp['hash']}")
print(f"\n Verifică manual pe Etherscan dacă adresa de mai sus")
print(f" este un exchange cunoscut (va avea tag)")
print(f"\n 💰 Pentru preț istoric ETH:")
print(f" https://coinmarketcap.com/currencies/ethereum/historical-data/")
print(f" Data: {fp['date'].strftime('%Y-%m-%d')}")
print("\n 📋 Primele 5 tranzacții incoming:")
for i, tx in enumerate(results['transactions'][:5], 1):
print(f"\n {i}. Data: {tx['date'].strftime('%Y-%m-%d %H:%M:%S')}")
print(f" Sumă: {tx['value']:.6f} ETH")
print(f" De la: {tx['from_address'][:16]}...{tx['from_address'][-4:]}")
def main():
"""Main function - interactive mode"""
print("=" * 70)
print("🔍 CRYPTO ADDRESS TRACKER - Găsește Prima Achiziție")
print("=" * 70)
tracker = CryptoTracker()
print("\nSelectează tipul de crypto:")
print("1. Bitcoin (BTC)")
print("2. Ethereum (ETH)")
choice = input("\nAlege (1/2): ").strip()
if choice == '1':
address = input("\nIntroduCe adresa Bitcoin: ").strip()
if not address:
print("❌ Adresă invalidă!")
return
tracker.track_bitcoin_address(address)
elif choice == '2':
address = input("\nIntroduCe adresa Ethereum (0x...): ").strip()
if not address.startswith('0x'):
print("❌ Adresă Ethereum invalidă! Trebuie să înceapă cu 0x")
return
print("\n📝 Optional: Etherscan API key (ENTER pentru a sări):")
print(" Obține gratuit de la: https://etherscan.io/apis")
api_key = input(" API Key: ").strip()
tracker.track_ethereum_address(address, api_key if api_key else None)
else:
print("❌ Opțiune invalidă!")
return
print("\n" + "=" * 70)
print("✅ Analiză completă!")
print("\n💡 Următorii pași:")
print(" 1. Notează data primei achiziții")
print(" 2. Verifică prețul istoric pentru acea dată pe CoinMarketCap")
print(" 3. Acela este prețul tău de achiziție pentru calcul impozit")
print("=" * 70)
if __name__ == "__main__":
main()

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requests==2.31.0

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#!/usr/bin/env python3
"""
Test script for crypto tracker with example addresses
"""
from crypto_tracker import CryptoTracker
def test_bitcoin():
"""Test with a real Bitcoin address"""
print("\n" + "="*70)
print("TEST 1: Bitcoin Address")
print("="*70)
tracker = CryptoTracker()
# Using a known address with public transactions
# This is a public address, not a personal wallet
test_address = "1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa" # Genesis block address
results = tracker.track_bitcoin_address(test_address)
return results
def test_ethereum():
"""Test with a real Ethereum address"""
print("\n" + "="*70)
print("TEST 2: Ethereum Address")
print("="*70)
tracker = CryptoTracker()
# Using Ethereum Foundation address (public)
test_address = "0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae"
results = tracker.track_ethereum_address(test_address)
return results
if __name__ == "__main__":
print("🧪 RULARE TESTE PENTRU CRYPTO TRACKER")
print("=" * 70)
print("\nAceste teste folosesc adrese publice cunoscute")
print("pentru a verifica că programul funcționează corect.\n")
input("Apasă ENTER pentru a continua cu testele...")
# Test Bitcoin
try:
btc_results = test_bitcoin()
print("\n✅ Test Bitcoin: SUCCES")
except Exception as e:
print(f"\n❌ Test Bitcoin: EȘUAT - {e}")
input("\nApasă ENTER pentru testul Ethereum...")
# Test Ethereum
try:
eth_results = test_ethereum()
print("\n✅ Test Ethereum: SUCCES")
except Exception as e:
print(f"\n❌ Test Ethereum: EȘUAT - {e}")
print("\n" + "="*70)
print("🎉 TESTE COMPLETE!")
print("="*70)
print("\n💡 Dacă ai văzut rezultate mai sus, programul funcționează!")
print(" Acum poți să-l folosești cu propriile tale adrese.\n")
print(" Rulează: python crypto_tracker.py")
print("="*70)