nell-scb-lib 1.5.0

Nellika SCB Payment Integration - Hardened C Module (Commercial License Required)

nell-scb-lib

Python C extension for SCB (Siam Commercial Bank) payment integration with PromptPay QR code generation.

⚠️ IMPORTANT LICENSING INFORMATION

This software is subject to commercial licensing terms and usage fees.

• This library requires a valid commercial license for production use
• Usage telemetry data is collected and transmitted to Nellika Consulting Services Ltd.
• By installing and using this library, you agree to the collection and transmission of usage telemetry
• For licensing inquiries and pricing information, please contact: [e-mail]

Copyright © 2024 Nellika Consulting Services Ltd. All rights reserved.

---

Overview

nell-scb-lib is a high-performance C extension module providing SCB payment integration for Python applications. It handles OAuth token management, QR code generation, and payment status checking through SCB's official API.

Installation

pip install nell-scb-lib

Supported Platforms:

• Linux x86_64 (manylinux_2_31+)
• macOS ARM64 (Apple Silicon M1/M2/M3/M4)
• Python 3.9 through 3.14

Telemetry & Privacy

This library collects the following telemetry data:

• License key usage and validation events
• API operation counts (QR creation, token refresh, payment checks)
• Error rates and types
• Library version and platform information
• No sensitive data (API keys, secrets, transaction details, or customer information) is collected

Telemetry helps us:

• Monitor license compliance
• Improve library stability and performance
• Provide better support to our customers

By using this library, you consent to this data collection.

For questions about data collection or to request data deletion, contact: [e-mail]

---

Quick Start

import nell_scb_lib

# Create QR payment (database-driven, recommended)
result = nell_scb_lib.create_qr_by_bank_account(
    bank_account_id=1,
    amount=250.75,
    ref1="P00001",      # Invoice number (max 20 chars)
    ref2="CUST001",     # Customer code (max 12 chars)
    ref3="SCB"          # Optional reference
)

if result['status']['code'] == 1000:
    qr_image = result['data']['qrImage']  # Base64 PNG
    qr_raw = result['data']['qrRawData']  # PromptPay string
    print(f"QR created: {result['data']['transactionId']}")

Environment Variables

Required for database-driven methods:

export PGDATABASE=your_database
export PGHOST=localhost
export PGPORT=5432
export PGUSER=odoo
export PGPASSWORD=your_password  # optional

API Reference

High-Level API (Recommended)

create_qr_by_bank_account(bank_account_id, amount, ref1, ref2, ref3="SCB")

Create SCB QR payment code using bank account ID. Automatically fetches configuration from database and manages token refresh.

Parameters:

• bank_account_id (str/int): Bank account ID from res.partner.bank
• amount (float): Payment amount in THB
• ref1 (str): Reference 1, max 20 characters
• ref2 (str): Reference 2, max 12 characters
• ref3 (str, optional): Reference 3, defaults to "SCB"

Returns: dict - SCB API response

{
    "status": {"code": 1000, "description": "Success"},
    "data": {
        "qrRawData": "00020101021230...",
        "qrImage": "iVBORw0KGgoAAAANSUhEUgAA...",
        "transactionId": "..."
    }
}

Example:

result = nell_scb_lib.create_qr_by_bank_account(
    bank_account_id=1,
    amount=250.75,
    ref1="P00001",
    ref2="CUST001"
)

---

Mid-Level API

create_qr_full(api_key, access_token, qr_create_url, biller_id, amount, ref1, ref2, ref3="SCB")

Create SCB QR code with explicit parameters (requires manual token management).

Parameters:

• api_key (str): SCB API key
• access_token (str): Valid OAuth token
• qr_create_url (str): SCB QR endpoint URL
• biller_id (str): PromptPay biller ID
• amount (float): Payment amount in THB
• ref1 (str): Reference 1, max 20 characters
• ref2 (str): Reference 2, max 12 characters
• ref3 (str, optional): Reference 3, defaults to "SCB"

Returns: dict - SCB API response

Example:

# Step 1: Get access token
token_resp = nell_scb_lib.refresh_token(api_key, api_secret, token_url)
access_token = token_resp['data']['accessToken']

# Step 2: Create QR
result = nell_scb_lib.create_qr_full(
    api_key="your_api_key",
    access_token=access_token,
    qr_create_url="https://api.scb/...",
    biller_id="894547854396914",
    amount=100.50,
    ref1="P00001",
    ref2="TEST"
)

---

refresh_token(api_key, api_secret, token_url)

Refresh SCB OAuth access token.

Parameters:

• api_key (str): SCB API key
• api_secret (str): SCB API secret
• token_url (str): Token endpoint URL

Returns: dict - Token response

{
    "status": {"code": 1000, "description": "Success"},
    "data": {
        "accessToken": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
        "expiresIn": 1800,
        "tokenType": "Bearer"
    }
}

---

Low-Level API

create_qr(config_id, amount, reference, channel="ecomm")

Create QR code using config ID from database (legacy method).

Parameters:

• config_id (str): SCB API configuration ID
• amount (float): Payment amount
• reference (str): Payment reference
• channel (str, optional): Payment channel, defaults to "ecomm"

Returns: dict - SCB API response

---

check_payment(reference)

Check SCB payment status by reference.

Parameters:

• reference (str): Payment reference to check

Returns: dict - Payment status

{
    "status": {"code": 1000, "description": "Success"},
    "data": {
        "paymentStatus": "SUCCESS",
        "transactionId": "...",
        "amount": 100.50
    }
}

---

version()

Get module version string.

Returns: str - Version (e.g., "1.5.0")

---

Database Schema Requirements

For database-driven methods, these tables are required:

res_partner_bank:

• Column: scb_biller_id (VARCHAR) - PromptPay biller ID

scb_api_config:

• Columns: api_key, api_secret, environment, token_url, qr_create_url, payment_inquiry_url
• Must have active configuration record

Error Handling (v1.2.0+)

All functions return dicts with status and data keys. Check status.code to determine success/failure.

result = nell_scb_lib.create_qr_by_bank_account(
    bank_account_id=1,
    amount=250.75,
    ref1="P00001",
    ref2="CUST001"
)

if result['status']['code'] == 1000:
    # Success - use the data
    qr_image = result['data']['qrImage']
    transaction_id = result['data']['transactionId']
    print(f"QR created: {transaction_id}")
else:
    # Error - check the code and description
    error_code = result['status']['code']
    error_msg = result['status']['description']
    print(f"Error {error_code}: {error_msg}")
    
    # Handle specific errors
    if error_code == 5114:
        print("Incorrect biller ID - check your bank account configuration")
    elif error_code in [9001, 9002]:
        print("Database connection issue - check environment variables")
    elif error_code == 9003:
        print("SCB configuration not found for this bank account")

Response Status Codes

Success Codes (1xxx)

• 1000: Success

SCB API Errors (5xxx)

These are errors returned directly from SCB's API:

• 5114: Incorrect biller ID - verify PromptPay biller ID in database
• Other 5xxx codes: See SCB API documentation

System Errors (9xxx)

Database Errors (90xx):

• 9001: Database environment variables not configured
• 9002: Failed to connect to database
• 9003: No SCB configuration found for bank account
• 9004: Invalid SCB API configuration (missing required fields)

Network Errors (91xx):

• 9101: Network error connecting to SCB token endpoint
• 9102: Network error connecting to SCB QR endpoint
• 9103: HTTP error from SCB API (see description for details)

Authentication Errors (93xx):

• 9301: Failed to refresh SCB access token
• 9302: Token refresh failed with HTTP error

Always check the status code:

if result['status']['code'] == 1000:
    # Process successful response
    qr_data = result['data']
else:
    # Handle error - log or display to user
    error_code = result['status']['code']
    error_msg = result['status']['description']
    
    # Example: Raise user-friendly error in Odoo
    if error_code in [5114, 9003, 9004]:
        # Configuration error - show to admin
        raise UserError(f"SCB Configuration Error: {error_msg}")
    else:
        # System error - log it
        _logger.error(f"SCB API error {error_code}: {error_msg}")

Best Practices

1. Use High-Level API: Prefer create_qr_by_bank_account() for automatic configuration management
2. Validate References: Keep ref1 ≤ 20 chars, ref2 ≤ 12 chars
3. Check Status Codes: Always verify status.code == 1000 before using data
4. Handle Errors: Wrap API calls in try-except blocks
5. Environment Setup: Configure PostgreSQL environment variables before use

Features

• ✅ Native C implementation for high performance
• ✅ Automatic OAuth token management
• ✅ Database-driven configuration
• ✅ PromptPay QR code generation
• ✅ Payment status checking
• ✅ Thread-safe operations
• ✅ Secure API communication (libcurl)
• ✅ Built-in license management
• ✅ Usage telemetry for compliance and support

Changelog

See CHANGELOG.md for detailed version history.

Latest Releases

v1.2.4 (2024-12-02)

• ⚡ PERFORMANCE: Automatic token caching in database
• Reduces token refresh API calls by ~95% (~30/day instead of ~100+/day)
• Token management now completely abstracted in C library
• Faster QR generation (no auth overhead when token is cached)

v1.2.3 (2024-12-02)

• 🔴 CRITICAL FIX: Corrected SCB config selection when multiple configs exist
• Fixed "Incorrect biller Id" errors (SCB 5114)
• Added detailed logging for Bank ID, Config ID, Biller ID

v1.2.2 (2024-12-01)

• Added companies data to USAGE telemetry
• Improved bump-version script with auto-detection

v1.2.1 (2024-12-01)

• Updated documentation with error codes

v1.2.0 (2024-12-01)

• BREAKING: API now returns dicts instead of raising exceptions
• Comprehensive error response framework
• Error codes: 1xxx (success), 5xxx (SCB API), 9xxx (system)

View Full Changelog →

---

Support & Contact

• Sales & Licensing: [e-mail]
• Technical Support: [e-mail]
• Privacy Inquiries: [e-mail]
• Website: https://nellika.co.th

Legal

Copyright © 2024 Nellika Consulting Services Ltd. All rights reserved.

This software is proprietary and confidential. Unauthorized copying, distribution, or use of this software, via any medium, is strictly prohibited without prior written permission from Nellika Consulting Services Ltd.

For licensing terms and conditions, please contact [e-mail]