245 lines
9.1 KiB
Python
245 lines
9.1 KiB
Python
"""
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AUTHOR:
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Khushal P Soonderji
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DATE:
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Monday, 16th Dec., 2024
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OBJECTIVE:
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To receive payment updates from various financial institutions.
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REFERENCES:
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N/A
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DOWNLOADS:
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N/A
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NOTES:
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N/A
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"""
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# *****************************************************************************************************************
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# ***** ****
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# *** IMPORT ***
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# ***** ****
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# *****************************************************************************************************************
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# To make sibling directories accessible for imports:
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import sys
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sys.path.append(".")
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sys.path.append("..")
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# For using Quart:
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from quart import Blueprint, current_app, request
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# My utils:
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from utils_v2.string import json
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from utils_v2.api.codes import StatusCodes, HttpCodes
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from utils_v2.api.response import ResponseModel
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from utils_v2.api.async_quart import (
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set_api_version,
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read_input,
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get_session_info,
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log_request_to_mongo,
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log_chain_to_mongo,
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should_not_be_under_maintenance,
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only_whitelisted_ips,
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limit_rate,
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validate_input,
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handle_cancelled_request
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)
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# Common:
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from shared import constants
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# To work with MongoDB:
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from bson.objectid import ObjectId
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# Data Models:
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from models.api.finstitutions.payments.request import PGPaymentRequestHeaders, PGPaymentRequestData
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from models.core.auth_token import CoreAuthTokenModel
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from models.core.payment import CorePaymentModel, PaymentEvent
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# For asynchronous activities:
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import asyncio
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# *****************************************************************************************************************
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# ***** ****
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# *** MACROS / ONE-TIME INIT ***
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# ***** ****
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# *****************************************************************************************************************
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# Related to Quart:
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pg_callback_bp = Blueprint("pg_callback", __name__)
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# *****************************************************************************************************************
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# ***** ****
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# *** VARIABLES ***
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# ***** ****
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# *****************************************************************************************************************
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# --- Nothing Yet
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# *****************************************************************************************************************
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# ***** ****
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# *** FUNCTIONS ***
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# ***** ****
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# *****************************************************************************************************************
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@pg_callback_bp.record_once
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def init(blueprint_setup_state):
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# This gets called when the blueprint is registered.
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# Consider this to be a one-time setup for the whole blueprint:
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pass
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# ---------------------------------------------------------------------------------------------------------------------
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@pg_callback_bp.route("/callback/safaricom/mpesaexpress", methods = ["POST"])
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@set_api_version(api_version = "1.0.0")
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@read_input(sanitize_headers = False, sanitize_data = False)
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@log_request_to_mongo(
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attr_name = "logs_mongo",
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project = constants.PROJECT_NAME,
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log_type = constants.MODULE_NAME,
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operation = "pgSafaricomMPesaExpressClbkApi",
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log_input = True,
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log_output = True,
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sensitive_keys = None
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)
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@log_chain_to_mongo(attr_name = "logs_mongo")
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@should_not_be_under_maintenance(attr_name = "is_under_maintenance")
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@handle_cancelled_request()
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async def safaricom_m_pesa_express_callback(
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inbound_headers: dict = None,
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inbound_data: dict = None,
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inbound_files: dict = None,
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**kwargs
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):
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"""
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We receive payment updates for various payment gateways here.
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:param inbound_headers: auto-extracted by the decorators.
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:param inbound_data: auto-extracted by the decorators.
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:param inbound_files: auto-extracted by the decorators.
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:param kwargs: Any number of extra inputs supplied by the decorators.
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:return: A standard response structure.
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"""
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# payment_info = await current_app.payment_controller.get_payment_internal(
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# mongo_conn = current_app.data_mongo,
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# payment_id = ObjectId(payment_id)
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# )
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# print("PAYMENT INFO:", json.to_string(payment_info.model_dump(), default=str))
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# ┏┓ ┓ ┓ ┏┓
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# ┣┫┏┫┏┫ ┣ ┓┏┏┓┏┓╋
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# ┛┗┗┻┗┻ ┗┛┗┛┗ ┛┗┗
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# Map out the documented codes provided by the payment gateway.
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# URL: https://developer.safaricom.co.ke/APIs/MpesaExpressSimulate
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code_map = {
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0: {
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"status": "settled",
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"message": "Payment successful :)"
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}, # ... Success
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1037: {
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"status": "failed",
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"message": "The payment gateway could not reach your customer."
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}, # ... DS Timeout. User could not be reached.
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1025: {
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"status": "failed",
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"message": "There was a system error in the payment gateway (1025)."
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}, # ... System error while trying to send the push request.
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9999: {
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"status": "failed",
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"message": "There was a system error in the payment gateway (9999)."
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}, # ... System error while trying to send the push request.
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1032: {
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"status": "rejected",
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"message": "Your customer declined the payment request."
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}, # ... Request Cancelled by the user.
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1: {
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"status": "failed",
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"message": "Your customer has insufficient balance."
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}, # ... The user has insufficient balance.
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2001: {
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"status": "failed",
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"message": "The payment gateway says your credentials are invalid."
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}, # ... Invalid credentials of the initiator.
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1019: {
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"status": "failed",
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"message": "The transaction expired before your customer processed it."
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}, # ... Transaction expired.
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1001: {
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"status": "failed",
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"message": "Your customer is already in the middle of some transaction on the payment gateway."
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}, # ... The payer is already making some transaction.
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}
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# Figure out which of the above codes is relevant to you:
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pg_reference_id = inbound_data["Body"]["stkCallback"]["CheckoutRequestID"]
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pg_result_code = int(inbound_data["Body"]["stkCallback"]["ResultCode"])
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relevant_code = code_map.get(
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pg_result_code,
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{
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"status": "unknown",
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"message": f"Unknown code '{pg_result_code}' from the payment gateway."
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}
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)
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# For now, we just insert the event into the record:
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event_note_success = await current_app.payment_controller.add_event_by_client_reference_id(
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mongo_conn = current_app.data_mongo,
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event = PaymentEvent(
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paymentStatus = relevant_code["status"],
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message = relevant_code["message"],
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initByPG = True,
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httpCode = None,
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headers = inbound_headers,
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payload = inbound_data
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),
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client_reference_id = pg_reference_id
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)
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# ┳┓
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# ┣┫┏┓┏┏┓┏┓┏┓┏┏┓
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# ┛┗┗ ┛┣┛┗┛┛┗┛┗
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# ┛
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# Done here:
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return ResponseModel(
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status_code = StatusCodes.OK if event_note_success else StatusCodes.FAILED,
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http_code = HttpCodes.SUCCESS if event_note_success else HttpCodes.INTERNAL_SERVER_ERROR
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)
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# *****************************************************************************************************************
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# ***** ****
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# *** MAIN PROGRAM ***
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# ***** ****
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# *****************************************************************************************************************
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if __name__ == "__main__":
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pass
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