# Meeting notes: Development, Sep 18 2018

**URL:** <https://forum.grin.mw/t/meeting-notes-development-sep-18-2018/851>\
**Category:** Development and Technical Discussion\
**Created:** [September 22, 2018, 2:18pm UTC](https://forum.grin.mw/t/meeting-notes-development-sep-18-2018/851 "2018-09-22T14:18:38Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![lehnberg](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.grin.mw/lehnberg/32/159_2.png) [@lehnberg](https://forum.grin.mw/u/lehnberg)\
**Post date:** [September 22, 2018, 2:18pm UTC](https://forum.grin.mw/t/meeting-notes-development-sep-18-2018/851/1 "2018-09-22T14:18:38Z")

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# Meeting notes

Development meeting held Sep 18 @ 3PM UTC in grin/dev on Gitter, full chat transcript [here](https://gitter.im/grin_community/dev?at=5ba1133bf4bd1056ac7f6d04).

## Attendance:

antioch  
hashmap  
igno.peverell  
tromp  
quentinlesceller  
yeastplume  
garyyu  
kargakis

## Agenda & Actions

### 1. General update

- Hard Fork went well, but had some couldn’t mine afterwards (fix went out)
- Soft Fork went well.
- Automated testing for mining has been difficult in past due to cuckoo memory requirements and travis CI.
- @kargakis made a suggestion for “a suite that deploys a networks of a couple of nodes, runs for some time, then redeploys some/all nodes using a different version”.
- Aggregate bulletproofs and a Schnorr sig improvement in the secpk256zkp fork via @jaspervdm, @Yeastplume has reviewed and bundled it into BIP32 mega PR: [mimblewimble/grin#1501](https://github.com/mimblewimble/grin/pull/1501)
- @gary nd @antioch have a plan to fix the “stale sync\_head” issue which was the cause of the “stuck in header sync loop”
- @tromp has written an exhaustive cycle finder for cuckatoo and a working simple miner

### 2. Testnet 4

Focus on next two weeks is preparing for Testnet 4, includes

- dual PoW
- BIP32 mega PR (as above)
- mean Cuckatoo CPU miner,
- replace current prevhash with pow mmr root to the header (for FlyClient compatibility)

### 3. PoW

- Discussion around [Scheduled PoW upgrades proposal](https://forum.grin.mw/t/scheduled-pow-upgrades-proposal/820)

- @tromp hopes to have lean cpu miner and a mean miner working in cuckatoo in next 2 weeks

- @Yeastplume to start work on rust test miner.

### 4. Other

- @hashmap is playing with libp2p and TLS support for Hyper to research different peer discovery mechanisms.

- Discussion on how to save space in headers. @gary ended up compiling this neat [wiki page](https://github.com/mimblewimble/docs/wiki/Block-Header).

–END–

_Feel free to raise suggestions / thoughts / comments and requests for future meeting agenda topics below!_

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**Author:** ![monkyyy](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.grin.mw/monkyyy/32/1590_2.png) [@monkyyy](https://forum.grin.mw/u/monkyyy)\
**Post date:** [September 23, 2018, 12:57am UTC](https://forum.grin.mw/t/meeting-notes-development-sep-18-2018/851/2 "2018-09-23T00:57:46Z")

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@tromp

You should probably change the name of cuckatoo before it gets to concrete; I can see it being confusingly similar

cuckoo-lite?

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**Author:** ![tromp](https://yyz2.discourse-cdn.com/flex036/user_avatar/forum.grin.mw/tromp/32/22_2.png) [@tromp](https://forum.grin.mw/u/tromp)\
**Post date:** [September 23, 2018, 7:45am UTC](https://forum.grin.mw/t/meeting-notes-development-sep-18-2018/851/3 "2018-09-23T07:45:30Z")

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It’s confusingly similar on purpose, as to most people the difference shouldn’t matter one bit.