Bakong-KHQR (Unofficial NBC)
A Python package for generating payment transactions compliant with the Bakong KHQR standard.
📱 Download Mobile App
-
Bakong App
|
-
Bakong Tourists
📋 Requirement
- Python 3.8+
- A Bakong account with full KYC verification
- An NBC Bakong Developer Token or a Bakong Relay Token (
rbk...)
(Sign up and generate your token at dash.bakongrelay.com)
📦 Installation
pip3 install bakong-khqr
or Update to the Latest Version:
pip3 install --upgrade bakong-khqr
🚀 Key Differences: Bakong Relay vs. NBC Official API
| Feature / Behavior | Bakong Relay (rbk... token) |
Bakong NBC (Developer Token / Offline) |
|---|---|---|
| API Endpoint | https://api.bakongrelay.com/v1 |
https://api-bakong.nbc.gov.kh/v1 |
| Hosting & IP Restriction | Global Access (No Cambodia IP restrictions) | Restricted to Cambodia IP addresses |
create_qr() Requirements |
Only amount is strictly required; merchant and currency details are auto-resolved from your RBK Token. |
Requires account_id, merchant_name, merchant_city, amount, and currency. |
| Amount Validation | Handled directly by Relay Backend (Min USD $0.01 / Min KHR 100). | Static or Dynamic offline EMVCo generation. |
| Transaction States | 4 States: PAID, SCANNED, UNPAID, EXPIRED |
2 States: PAID, UNPAID |
| Polling Optimization | SCANNED = 3s delay; PAID/EXPIRED = 0s (exit loop). |
PAID = 0s; UNPAID = 5s–300s window matrix. |
| Gateway Error Handling | Detailed errors (Token expired/over-limit, Maintenance, Rate limit, Store config). | Standard NBC error messages. |
💻 Usage Guide
1. Using Bakong Relay (rbk... Token) — Recommended
When using an rbk... token, create_qr() only requires amount. All merchant and currency details are automatically retrieved from your Store Link configured in the Bakong Relay dashboard.
import time
from bakong_khqr import KHQR
# Initialize with your Bakong Relay Store Token
khqr = KHQR("rbk_live_xxxxxxxxxxxxxxxxxxxx")
# 1. Generate QR Code (amount only; backend auto-detects currency & merchant info)
qr_string = khqr.create_qr(amount=1.50)
print("KHQR String:", qr_string)
# 2. Get MD5 Checksum
md5 = khqr.generate_md5(qr_string)
print("Transaction MD5:", md5)
# 3. Smart Polling Loop (Handles PAID, SCANNED, UNPAID, and EXPIRED)
start_time = time.time()
timeout_seconds = 10 * 60 # 10 minutes
while True:
status, next_delay = khqr.check_payment(md5, start_time=start_time)
print(f"Current Status: {status} | Next check in: {next_delay}s")
if status == "PAID":
print("🎉 Payment Successful!")
payment_info = khqr.get_payment(md5)
print("Transaction Details:", payment_info)
break
elif status == "EXPIRED":
print("❌ Transaction has expired!")
break
elif status == "SCANNED":
print("📱 Customer has scanned the QR. Awaiting PIN/confirmation...")
# Stop polling if client timeout is reached
if time.time() - start_time >= timeout_seconds:
print("🛑 Local polling timeout reached.")
break
time.sleep(next_delay)
2. Using Official NBC Token or Offline KHQR Generation
If initialized without a token or with an official NBC Developer Token, the SDK uses the standard EMVCo offline engine:
from bakong_khqr import KHQR
# Without token (Offline EMVCo Generator) or with NBC Token
khqr = KHQR("your_nbc_developer_token_here")
# Full EMVCo parameters are required
qr_string = khqr.create_qr(
account_id="user_name@bank",
merchant_name="My Store",
merchant_city="Phnom Penh",
amount=10.00,
currency="USD",
store_label="Cashier-01",
phone_number="012345678",
bill_number="TRX012345",
terminal_label="POS-01",
static=False,
expiration=1
)
md5 = khqr.generate_md5(qr_string)
# Check status via official NBC API (Returns either PAID or UNPAID)
status = khqr.check_payment(md5)
print("Status:", status)
3. Generate Mobile Banking Deeplink
Generate a direct link to open the mobile banking app:
deeplink = khqr.generate_deeplink(
qr=qr_string,
appDeepLinkCallback="https://your_website.com/checkout/success](https://your_website.com/checkout/success)",
appIconUrl="https://your_website.com/images/logo.png](https://your_website.com/images/logo.png)",
appName="MyStore"
)
print("Deeplink URL:", deeplink)
4. Batch Transaction Verification (check_bulk_payments)
Check multiple transactions in a single API call (Maximum 50 hashes per request):
md5_list = [
"dfcabf4598d1c405a75540a3d4ca099d",
"5154e4f795634ff1a0ae4b48e53a6d9c",
"a57d9bb85f52f12a20cf7beecb03d11d"
]
# Returns a list of MD5 hashes that are confirmed as PAID
paid_hashes = khqr.check_bulk_payments(md5_list)
print("Paid transactions:", paid_hashes)
5. Generate Styled QR Code Image
Install optional dependencies with pip install "bakong-khqr[image]":
# Generate styled KHQR PNG image
image_path = khqr.qr_image(qr_string, format="png")
print("Saved to:", image_path)
# Or export as Base64 Data URI for web embedding
base64_uri = khqr.qr_image(qr_string, format="base64_uri")
print('<img src="' + base64_uri + '" />')
🧠 Smart Polling Guide for check_payment()
The check_payment() method dynamically adjusts next_delay when start_time is supplied, preserving API quotas and adapting to customer actions:
| Transaction State | Token Type | Recommended Delay | Explanation |
|---|---|---|---|
SCANNED |
Bakong Relay (rbk...) |
3 seconds |
Customer has scanned the QR code. Tight polling for instant confirmation. |
PAID |
Both | 0 seconds |
Terminal state. Payment confirmed; break out of the loop immediately. |
EXPIRED |
Bakong Relay (rbk...) |
0 seconds |
Terminal state. Session timed out; break out of the loop immediately. |
UNPAID (0 – 5 min) |
Both | 5 seconds |
Active transaction window. High likelihood of scanning. |
UNPAID (5 – 15 min) |
Both | 10 seconds |
Customer might be delayed; reduces request frequency. |
UNPAID (15 – 60 min) |
Both | 15 seconds |
Extended transaction window. |
UNPAID (> 60 min) |
Both | 300 seconds (5 min) |
Dormant or forgotten session; maximum token preservation. |
🛠️ Method Reference
create_qr(...) -> str: Creates an EMVCo-compliant KHQR string. Forrbktokens, requestsapi.bakongrelay.com; for NBC tokens or offline use, compiles locally.generate_md5(qr: str) -> str: Computes the 32-character hexadecimal MD5 hash for the QR code.generate_deeplink(...) -> str | None: Generates a mobile banking deep link.check_payment(md5: str, start_time: float | None = None) -> str | tuple[str, int]:- Without
start_time: Returns status string (PAID,SCANNED,UNPAID,EXPIRED). - With
start_time: Returns(status, next_delay)tuple.
- Without
get_payment(md5: str) -> dict | None: Returns transaction details if confirmedPAID. ReturnsNoneifSCANNED,UNPAID, orEXPIRED.check_bulk_payments(md5_list: list[str]) -> list[str]: Verifies an array of MD5 hashes (Max 50) and returns a list of paid hashes.qr_image(qr: str, format: str = "png", output_path: str | None = None) -> str | bytes: Exports styled KHQR image in PNG, JPEG, WebP, raw bytes, Base64, or Data URI format.
⚠️ Web Checkout Integration (Coming soon)
📜 License
This project is licensed under the MIT License. See the LICENSE file for details.
📬 Contact & Support
- Author: BAN Sothen
- Email: bansokthen@gmail.com
- Telegram Support: @bakongRelaySupport
- Buy Me a Coffee: buymeacoffee.com/bsthen
❤️ Sponsors
This project is supported by the community.
👉 List Sponsors & Donors
1 maintainer
Metadata
1 maintainer
Release files for bakong-khqr 0.6.3
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Source distribution (sdist)
| File | Size | Uploaded | |
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| bakong_khqr-0.6.3.tar.gz | 213.9 kB | Details |
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| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| bakong_khqr-0.6.3-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 426.5 kB
Release files / bakong_khqr-0.6.3.tar.gz
| Download URL | bakong_khqr-0.6.3.tar.gz |
|---|---|
| Size | 213.9 kB |
| Tags | Source |
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SHA-256 checksum How to use checksums |
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Transparency logRelease files / bakong_khqr-0.6.3-py3-none-any.whl
| Download URL | bakong_khqr-0.6.3-py3-none-any.whl |
|---|---|
| Size | 212.6 kB |
| Tags | Python 3 |
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SHA-256 checksum How to use checksums |
fbc15cc387f57f62ecf0fce44c6c5cdd066cd740b18c157e0e0de35d9e684315
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Uploaded using Trusted Publishing? What is trusted publishing? |
Yes |
| Uploaded via |
twine/7.0.0 CPython/3.13.14
|
Provenance
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