LUD-09 success message is trimmed when multiline

[yanascz]

Expected Behaviour

Multiline success messages shall be visible untrimmed in the app without the need to leave the app.

Other LN wallets use either of these solutions:

1. Unmodified success message is shown. (preferred)
   • Some wallets wrap it in a scrollable view with a border.
2. Line breaks are replaced with " ". (sufficient)
   • This one should be an easy fix. However, would be great for the copy button to copy the original message.

How To Reproduce?

1. Scan an LNURL-pay QR code of a service that uses LUD-09 success message.
   You can use the one below.
2. Confirm the payment and wait for the success dialog to appear.
   Notice there are only two lines present, the rest is trimmed.
3. Close the dialog and open payment details, expand the Message field.
   Notice there are only four lines present, the rest is still trimmed.
4. Use the copy button and paste the message somewhere else.
   Notice there are actually eight lines in the message.

Screenshots

QR Code for Testing

Operating System

iOS 18.0.1

Breez Version

1.1.19 from App Store

[yanascz]

Looking at lnurl_success_action_dialog.dart, what is the motivation to limit message success action to 2 lines? 🤔 The URL success action has 4 lines configured. And if there’s an error, 10+ lines is not an issue: