from odoo import api, fields, models

class PosConfig(models.Model):
    _inherit = 'pos.config'

    reward_point_digits = fields.Integer(string="Reward Point Digits", default=2)

    @api.model
    def _load_pos_data_fields(self, config):
        fields_list = super()._load_pos_data_fields(config)
        if fields_list:
            fields_list.append('reward_point_digits')
        return fields_list