Request Invoicing - Auto-increment invoice number

[MantisClone]

Defintion of Done

• Count the number of existing outgoing invoices for a given address and generate an Invoice Number +1 like "INV-002"
• Make the Invoice Number default to the auto-increment. Add a button to edit.

Consideration

We considered deriving the auto-increment based on existing invoice numbers, but this is too complicated.

It should count encrypted requests.

We'll need to decrypt requests on the Create Invoice Form which we've not done before.

[MantisClone]

Consider matching EasyInvoice format: YYYYMM-XXXX where XXXX resets to 0 each month.

Example: 202503-0002

Reference:

• EasyInvoice - Auto-increment invoice number easy-invoice#22