I need a solution for the following situation.

Early payment discount is applicable for both customer's and supplier's invoices.

Invoice amount: EUR 121 (including 21% VAT)
Payment term: 30 days, -5% discount if paid within 7 days

What I need is for Odoo to only take the 5% discount into consideration when processing the bankstatement.

Example:
Amount received: EUR 116 (121 - (5% of 100, amount excluding VAT))
When processing receipt or paid amount via the bankstatement and selecting the invoice corresponding with the invoice for which payment has been received/done, Odoo should split the invoice selected into 2 invoice lines, 1 for EUR 116 and 1 for EUR 5.
The received amount can be reconciled with the invoice line for EUR 116 and the second invoice line for EUR 5 can manually be written off to a discount account in the P&L.

Note:
As long as the invoice status is open, 100% of the invoice amount should be included in all other reports. This means that the 5% discount is only taken into account when selecting the invoice when processing the bankstatement.
Example
- The accounts receivable and payable should include 1 invoice line for 100% of the invoice amount.
- If customer invoice status is open, the customer statement should include 1 invoice line for 100% of the invoice amount.
- The aged reports should include 1 invoice line for 100% of the invoice amount.

Thanks in advance.