bug: No balance validation — swap submits amounts exceeding wallet balance #9

New issue

Closed

opened 2026-03-12 04:49:52 +00:00 by Brouie · 8 comments

Brouie commented

2026-03-12 04:49:52 +00:00

(Migrated from gitlab.com)

Description

Swap allows submitting amounts larger than wallet balance. TX fails on-chain with overflow error instead of being caught client-side.

Error

Overflow: Cannot Sub with 895770474897 and 1009976018432: execute wasm contract failed

Expected

Frontend should check wallet token balance and disable swap button or show error when amount exceeds balance.

Steps to Reproduce

Connect wallet
Select any pair
Enter amount larger than token balance
Click Swap
TX submits and fails on-chain

Impact

Bad UX — user wastes gas on a guaranteed-to-fail transaction.

## Description Swap allows submitting amounts larger than wallet balance. TX fails on-chain with overflow error instead of being caught client-side. ## Error `Overflow: Cannot Sub with 895770474897 and 1009976018432: execute wasm contract failed` ## Expected Frontend should check wallet token balance and disable swap button or show error when amount exceeds balance. ## Steps to Reproduce 1. Connect wallet 2. Select any pair 3. Enter amount larger than token balance 4. Click Swap 5. TX submits and fails on-chain ## Impact Bad UX — user wastes gas on a guaranteed-to-fail transaction.

PlasticDigits commented

2026-03-12 07:04:51 +00:00

(Migrated from gitlab.com)

Fix implemented in commit 711f692: the frontend now queries the offer token balance and disables the Swap button with an "Insufficient Balance" message when the entered amount exceeds the wallet balance. Balance is displayed with a Max button. @Brouie please verify when you have a moment.

Fix implemented in commit 711f692: the frontend now queries the offer token balance and disables the Swap button with an "Insufficient Balance" message when the entered amount exceeds the wallet balance. Balance is displayed with a Max button. @Brouie please verify when you have a moment.

PlasticDigits commented

2026-03-12 11:49:15 +00:00

(Migrated from gitlab.com)

mentioned in commit 711f692c74

mentioned in commit 711f692c741958b9476f7255b6b38c2fc83db766

Brouie (Migrated from gitlab.com) closed this issue

2026-03-13 01:57:15 +00:00

Brouie commented

2026-03-13 01:57:16 +00:00

(Migrated from gitlab.com)

Verified fixed — swap page now shows INSUFFICIENT BALANCE when amount exceeds wallet balance.

Brouie commented