biapay 4.0.0

Official Python SDK for the BIAPAY Payment Gateway

BIAPAY Python SDK

Official Python SDK for integrating the BIAPAY payment gateway into your Python applications.

Features

• Session creation — Authenticate and create payment sessions with one call
• Iframe helpers — Generate ready-to-use <iframe> HTML or just the URL
• Localization — French language support (&lang=fr)
• Callback verification — Verify HMAC-SHA256 signatures on BIAPAY callbacks
• Framework-agnostic — Works with Django, Flask, FastAPI, or plain Python
• Typed & documented — Full docstrings, type hints, and clear exceptions

---

Installation

pip install biapay

Requirements: Python 3.8+, requests >= 2.25.0

---

Quick Start

1. Register on BIAPAY

Create a merchant account at https://connect.biapay.net/register and obtain your Client ID and Client Secret from your POS settings.

2. Create a payment session

from biapay import BIAPay

client = BIAPay(
    client_id="your-client-id",
    client_secret="your-client-secret"
)

session = client.create_payment_session(
    order_id="ORDER-001",
    amount=5000,            # Amount in smallest currency unit
    currency_code="XAF",
    customer_email="[e-mail]",
    customer_phone="237600000000",
    transaction_id="TXN-001"  # Optional, defaults to order_id
)

print(session.launch_url)  # Load this in your iframe

3. Embed the payment iframe

# Get a plain URL
url = session.get_iframe_url()

# Get a URL in French
url_fr = session.get_iframe_url(lang="fr")

# Get a full HTML <iframe> tag
html = session.get_iframe_html(width="100%", height="600")

# Get a French iframe
html_fr = session.get_iframe_html(lang="fr", style="border:none;")

Output example:

<iframe src="https://payment.biapay.net/web/iframe/init?Authorization=eyJ..." width="100%" height="600" frameborder="0" allowfullscreen="true"></iframe>

---

Callback Handling

After the customer completes (or fails) the payment, BIAPAY redirects to your callback URL (configured in your POS settings on the merchant panel).

Set up your callback URL

In the BIAPAY merchant panel → POS → Edit → set your Callback URL, e.g.:

https://yoursite.com/payment/biapay/callback

Handle the callback

from biapay import BIAPay, CallbackPayload
from biapay.exceptions import BIAPaySignatureError

client = BIAPay(
    client_id="your-client-id",
    client_secret="your-client-secret"
)

# --- Django example ---
def payment_callback(request):
    try:
        payload = client.process_callback(request.GET)
    except BIAPaySignatureError:
        return HttpResponse("Forbidden", status=403)

    if payload.is_completed:
        # Payment successful — fulfill the order
        Order.objects.filter(id=payload.order_id).update(status="paid")
        print(f"Order {payload.order_id} paid via BIAPAY Txn {payload.biapay_transaction_id}")
    else:
        # Payment failed
        print(f"Order {payload.order_id} payment failed. Status: {payload.status}")

    return HttpResponse("OK")

# --- Flask example ---
from flask import request as flask_request
from biapay.exceptions import BIAPaySignatureError

@app.route("/payment/biapay/callback")
def payment_callback():
    try:
        payload = client.process_callback(flask_request.args)
    except BIAPaySignatureError:
        return "Forbidden", 403

    if payload.is_completed:
        # handle success
        pass

    return "OK"

Manual signature verification

from biapay import CallbackPayload

# Parse the callback manually
payload = CallbackPayload.from_query_params(request.GET)

# Verify the signature
is_valid = client.verify_callback_signature(payload)
if not is_valid:
    raise Exception("Invalid callback signature!")

print(payload.order_id)
print(payload.status)           # "COMPLETED" or "FAILED"
print(payload.amount)
print(payload.biapay_transaction_id)
print(payload.is_completed)     # True / False

---

API Reference

BIAPay(client_id, client_secret, base_url, timeout, originated_by)

Main client class.

Parameter	Type	Default	Description
client_id	str	required	Your BIAPAY POS Client ID
client_secret	str	required	Your BIAPAY POS Client Secret
base_url	str	https://api.biapay.net/gateway	API base URL
timeout	int	30	HTTP timeout in seconds
originated_by	str	"2"	Channel identifier

Methods

Method	Returns	Description
create_payment_session(...)	PaymentSession	Create a payment session
verify_callback_signature(callback)	bool	Verify HMAC signature
process_callback(params, verify_signature=True)	CallbackPayload	Parse + verify callback

---

PaymentSession

Attribute	Type	Description
access_token	str	JWT token
url	str	Base iframe URL
launch_url	str	Full iframe URL with token

Method	Description
get_iframe_url(lang=None)	Returns the iframe src URL
get_iframe_html(lang=None, **attrs)	Returns a full <iframe> HTML string

---

CallbackPayload

Attribute	Type	Description
order_id	str	Your original order ID
status	str	"COMPLETED" or "FAILED"
amount	str	Transaction amount
currency	str	Currency code
biapay_transaction_id	str	BIAPAY transaction reference
transaction_id	str	Your original transaction ID
biapay_signature	str	HMAC signature for verification
is_completed	bool	True if payment completed
is_failed	bool	True if payment failed

---

Exceptions

Exception	When raised
BIAPayError	Base exception — catch-all for BIAPAY errors
BIAPayAuthError	Invalid client_id or client_secret
BIAPayConnectionError	Network or connection failure
BIAPaySignatureError	Callback HMAC signature mismatch
BIAPayValidationError	Missing or invalid request parameters

from biapay.exceptions import BIAPayError, BIAPayAuthError, BIAPayConnectionError

try:
    session = client.create_payment_session(...)
except BIAPayAuthError:
    print("Check your client_id and client_secret")
except BIAPayConnectionError:
    print("Network error — check your connection")
except BIAPayError as e:
    print(f"BIAPAY error: {e.message} (status: {e.status_code})")

---

Sandbox / Dev Environment

client = BIAPay(
    client_id="your-client-id",
    client_secret="your-client-secret",
    base_url="https://gatewaydev.biapay.net"  # Dev/sandbox URL
)

---

License

MIT License. See LICENSE for details.