How to Build a Crypto Payment System in Python

#python #bitcoin #cryptocurrency #tutorial

Building a crypto payment system in Python is simpler than you think.

Bitcoin Payment Verification

import requests
import time

def check_btc_payment(address, expected_sats, timeout=3600):
    api = f"https://blockstream.info/api/address/{address}/utxo"
    start = time.time()
    while time.time() - start < timeout:
        try:
            utxos = requests.get(api, timeout=10).json()
            total = sum(u.get("value", 0) for u in utxos)
            if total >= expected_sats:
                return {"status": "confirmed", "amount": total}
        except:
            pass
        time.sleep(60)
    return {"status": "timeout"}

Generate Payment QR Code

import qrcode

def payment_qr(address, amount_btc):
    uri = f"bitcoin:{address}?amount={amount_btc}"
    img = qrcode.make(uri)
    img.save("payment_qr.png")

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