0011821: wallets should show notifications when balance changes due to double spending

ID	Project	Category	View Status	Date Submitted	Last Update
0011821	Taler	wallet (all platforms)	public	2026-09-24 10:20	2026-11-03 13:53

Reporter	Florian Dold	Assigned To	Florian Dold	Resolution deadline
Implementer	Florian Dold	Reviewer	MarcS
Release signed by	Florian Dold	Deployed by	MarcS
Verifier	Florian Dold	Communicator
Data protection authority notification required	No
CSIRT notification required	No
Estimated effort (hours)	16	Actual effort (hours)	0
Fast-track	No
Work package	none
Priority	normal	Severity	minor	Reproducibility	have not tried
Status	implementing	Resolution	open
Target Version	1.7

Summary	0011821: wallets should show notifications when balance changes due to double spending
Description	When a wallet restored from a backup contains coins already spent, a payment can cause an unexpected balance jump: The balance decreases due to the completed payment and due to detected double-spending. In this case, we should display some kind of notification to the user. Alternatives would be separate transactions for double spending, but IMO dismissable notifications are better suited: * These events don't fit the typical transaction lifecycle * It doesn't make sense to merge them in backup/sync
Tags	No tags attached.

Date Modified	Username	Field	Change
2026-09-24 10:20	Florian Dold	New Issue
2026-09-24 10:20	Florian Dold	Status	new => assigned
2026-09-24 10:20	Florian Dold	Assigned To	=> Florian Dold
2026-11-03 07:21		Status	assigned => implementing
2026-11-03 13:53	Christian Grothoff	Implementer	=> Florian Dold
2026-11-03 13:53	Christian Grothoff	Reviewer	=> MarcS
2026-11-03 13:53	Christian Grothoff	Release signed by	=> Florian Dold
2026-11-03 13:53	Christian Grothoff	Deployed by	=> MarcS
2026-11-03 13:53	Christian Grothoff	Verifier	=> Florian Dold
2026-11-03 13:53	Christian Grothoff	Estimated effort (hours)	=> 16