# Dev Update 22 July 2025

**URL:** <https://talk.neptune.cash/t/dev-update-22-july-2025/84>\
**Category:** News and Announcements\
**Tags:** dev-updates\
**Created:** [July 22, 2025, 5:45am UTC](https://talk.neptune.cash/t/dev-update-22-july-2025/84 "2025-07-22T05:45:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![neptune-team](https://talk.neptune.cash/user_avatar/talk.neptune.cash/neptune-team/32/18_2.png) [@neptune-team](https://talk.neptune.cash/u/neptune-team)\
**Post date:** [July 22, 2025, 5:45am UTC](https://talk.neptune.cash/t/dev-update-22-july-2025/84/1 "2025-07-22T05:45:34Z")

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![neptune-banner](https://talk.neptune.cash/uploads/default/original/1X/3e76822acc7dcfcb498d95fe5340996dc945ea98.jpeg)

### Last week by the numbers

**neptune-core**

- [1 commits to master branch](https://github.com/Neptune-Crypto/neptune-core/commits/master/?since=2025-07-13&until=2025-07-20)
- [2 issues closed](https://github.com/Neptune-Crypto/neptune-core/issues?q=is:issue+state:closed+closed:2025-07-13..2025-07-20)
- [3 pull requests raised](https://github.com/Neptune-Crypto/neptune-core/issues?q=is:pr+created:2025-07-13..2025-07-20)

## Neptune Happenings

### Video: Inflation Bug Details

In [this video](https://www.youtube.com/watch?v=aAonMmYgnVA) @aszepieniec and @sword-smith discuss the undetectable inflation bug in detail as well as the fix and how to prevent a similar bug in the future. There is also discussion of additional work that is being done in preparation for the upcoming network reset.

At a high level the bug occurred due to a missing validation of the native-currency fee when the transaction does not contain any native-currency inputs or outputs. A transaction with a large inflationary fee could then be merged with a negative fee transaction to produce a transaction that looks to have a normal fee but in fact is highly inflationary. Once merged there is no way to “unmerge” the transactions and see the original fee amounts.

### Network Reset Preparations

Work progressed in these areas:

1. New RPC endpoints to set the tip to a specific stored block (for redemptions)
2. Debugging and fixing a removal record list issue
3. preparing the UTXO redemption claim pipeline

## Contributor Updates

@aszepieniec:

- packing `RemovalRecord`s
- set tip to stored block + test ([#626](https://github.com/Neptune-Crypto/neptune-core/issues/626))
- endpoints + pipeline for producing UTXO redemption claims ([#626](https://github.com/Neptune-Crypto/neptune-core/issues/626))