Meeting Minutes 3
===

###### tags: `BDK Core` `Meeting`

:::info
- **Location:** Online
- **Date:** Oct 14, 2022 09:00 AM (UTC)
- **Agenda**
- Weekly standup
- Change to floating points for feerate calculations?
- How should we continue with coin control?
- Testing.
- How can be on-board new contributors?
- **Participants:**
- Evan (@evanlinjin)
- Daniela (@danielabrozzoni)
- Lloyd (@LLFourn)
- Raj (@rajarshimaitra)
- **Reference:**
- [Project board](https://github.com/users/LLFourn/projects/2/views/1)
- [Raj's notes on coin control](https://hackmd.io/@raj/H18T1LV7i)
- [Last meeting](https://hackmd.io/@evanlinjin/bdk_minutes_20221007)
:::

### Minutes

**Standup**

* Evan splitting up...
* Lloyd
* General API for BnB, but still does what Bitcoin Core does.
* Daniela
* Nearly there, 3 days? But bugs.
* Solution is close to what Lloyd had in mind.
* Vec of placeholders -> build_witness -> substitute placeholders with actual pks/sigs/etc -> :tada:
* can derive works for pks, but not pk hashes. Children keys? Use descriptor keys for now, iterate on top on that, add derive trait later.
* TODO: Replace what is on bdk_core and see how it plays out.
* Raj
* Rpc sync with new structure.
* Worked on coin control document, but needs to wait on what happens with coin selector and miniscript planning module.
* Coin control is pre-processing before coin selection. Defines boundary, criteria for what coins to be candidates. Grouping, filtering and adding metadata basically.
* Testing framework for bdk_core. Move testing framework from BDK -> bdk_core.

**In two weeks - PR applying everything we do to bdk :tada:**
* Use new Coin Selection API
* CoinSelectionAlgorithm trait dies :skull_and_crossbones:
* Use new Syncing API
* Blockchain trait dies :skull_and_crossbones:
* Use the planning stuff instead of `max_sat_weight`
* Focus on replacing internals, avoid keep adding features
* How to persist data?
* Don't break everything just now, just what we need
* Some API will change a bit (CS), some will change a lot (Sync)
* TxBuilder good enough :heart:
* "Stable" API end of next week so we can start testing.