# Copyright 2019 Camptocamp SA
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl)


from odoo import fields, models


class SaleOrder(models.Model):
    _inherit = "sale.order"

    transaction_id = fields.Char(
        "Transaction ID",
        required=False,
        copy=False,
        help="Transaction id from the financial institute",
    )

    def _prepare_invoice(self):
        """Propagate the transaction_id from the sale order to the invoice."""
        invoice_vals = super()._prepare_invoice()
        invoice_vals["transaction_id"] = self.transaction_id
        return invoice_vals