[ADD] pos_payment_method_fee: add module

pos_payment_method_fee/README.rst

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+.. image:: https://odoo-community.org/readme-banner-image
+   :target: https://odoo-community.org/get-involved?utm_source=readme
+   :alt: Odoo Community Association
+
+=======================
+POS Payment Method Fees
+=======================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
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+.. |badge1| image:: https://img.shields.io/badge/maturity-Beta-yellow.png
+    :target: https://odoo-community.org/page/development-status
+    :alt: Beta
+.. |badge2| image:: https://img.shields.io/badge/license-LGPL--3-blue.png
+    :target: http://www.gnu.org/licenses/lgpl-3.0-standalone.html
+    :alt: License: LGPL-3
+.. |badge3| image:: https://img.shields.io/badge/github-OCA%2Fpos-lightgray.png?logo=github
+    :target: https://github.com/OCA/pos/tree/16.0/pos_payment_method_fee
+    :alt: OCA/pos
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/pos-16-0/pos-16-0-pos_payment_method_fee
+    :alt: Translate me on Weblate
+.. |badge5| image:: https://img.shields.io/badge/runboat-Try%20me-875A7B.png
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+    :alt: Try me on Runboat
+
+|badge1| |badge2| |badge3| |badge4| |badge5|
+
+Models transactional financial fees per POS payment method.
+Fees can be defined for each available payment method.
+The corresponding fee amount is calculated automatically during order payment.
+This module facilitates the management of surcharges associated with credit cards or other payment methods.
+The applied fee amounts are posted into accounting.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Configuration
+=============
+
+To configure payment methods and their fees in Point of Sale:
+
+1. Go to *Point of Sale -> Configuration -> Payment Methods*.
+2. Create a new payment method or open an existing one.
+3. Configure the **Fee Grouping Policy**:
+
+   * **Grouped**: Fees are summarized per fee rule into a single journal entry at session close.
+   * **Detailed**: One journal entry is generated per transaction fee at session close.
+
+4. Under the **Transaction Fees** section, add one or more fee rules:
+
+   * **Fee Type**: Select *Fixed* or *Percentage*.
+   * **Amount**: Set the fixed amount or percentage value.
+   * **Posting Policy**: Select *Immediate* (posted immediately upon payment) or *At Session Close* (posted when POS session is closed).
+   * Configure the **Fee Account**, **Counterpart Account**, and **Posting Journal**.
+
+5. Save the payment method.
+6. Ensure the payment method is added to the relevant **POS Configuration** (*Point of Sale -> Configuration -> Point of Sale*).
+
+Usage
+=====
+
+Usage in Point of Sale session:
+
+1. Open a POS session and select an order.
+2. Select a payment method configured with fee rules.
+3. The system automatically calculates and registers the corresponding fee line.
+4. Validate the payment and close the session according to the configured posting policy.
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/pos/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us to smash it by providing a detailed and welcomed
+`feedback <https://github.com/OCA/pos/issues/new?body=module:%20pos_payment_method_fee%0Aversion:%2016.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+
+Do not contact contributors directly about support or help with technical issues.
+
+Credits
+=======
+
+Authors
+~~~~~~~
+
+* BINHEX Systems Solutions S.L.
+
+Contributors
+~~~~~~~~~~~~
+
+* `BINHEX Systems Solutions <https://www.binhex.es>`_:
+
+  * Ariel Torres Galvez
+  * Abraham J. Febres
+
+Maintainers
+~~~~~~~~~~~
+
+This module is maintained by the OCA.
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+This module is part of the `OCA/pos <https://github.com/OCA/pos/tree/16.0/pos_payment_method_fee>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

pos_payment_method_fee/__init__.py

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+from . import models

pos_payment_method_fee/__manifest__.py

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+{
+    "name": "POS Payment Method Fees",
+    "summary": "Models transactional financial fees per POS payment method, "
+    "with automatic posting and complete traceability.",
+    "version": "16.0.1.0.0",
+    "category": "Point of Sale",
+    "license": "LGPL-3",
+    "author": "BINHEX Systems Solutions S.L., Odoo Community Association (OCA)",
+    "website": "https://github.com/OCA/pos",
+    "depends": [
+        "point_of_sale",
+        "account",
+    ],
+    "data": [
+        "security/ir.model.access.csv",
+        "views/pos_payment_method_fee_views.xml",
+        "views/pos_payment_fee_line_views.xml",
+    ],
+    "installable": True,
+    "application": False,
+    "auto_install": False,
+}