UPDATE: I'm using MongoDB along with the Motor Python library for async connections. It's proving to be .... interesting. But it does seem to be working.

I'm working on something cool.... a limited Lightning Network to Hive bridge for podcasters on 3speak.
<div class="pull-right">


![Streaming Sats raw data](https://files.peakd.com/file/peakd-hive/brianoflondon/23t76kVtD5n2RntjPpgWipvUKRRRcm4Z7tqXEVPZ5XkptmJHmKPqK1XPGCv9tF4tmp7MU.png)

</div>

As I alluded to but didn't fully explain last week, every show on @threespeak is becoming a podcast because 3speak are adding RSS feeds to all their channels. It was a relatively simple code change with a huge implication. I'll explore that in a post very soon.

## The programming question

What I need help with is a modern database way, fully containerised to run alongside another containerised Python script I'm writing which reads the incoming invoices off my own Lightning node.

I'm bewildered by the choices of MongoDB, Postgres, MySQL and even wondering if MySQLLite is enough for what I'm doing! I suspect I'll use Tortoise ORM alongside the FastAPI I'm using so far.

My code is fetching and building a Python Dict object with the details of each `keysend` invoice and this is what I need to store in the database.

I already have a basic model in Pydantic so what's the best database to store these two datastructures?

```
class V4VDetails(BaseModel):
    action: Optional[str]
    app_name: Optional[str]
    podcast: Optional[str]
    name: Optional[str]
    url: Optional[str]
    itemID: Optional[int]
    episode_guid: Optional[str]
    episode: Optional[str]
    ts: Optional[int]
    speed: Optional[float]
    feedID: Optional[int]
    action: Optional[str]
    message: Any
    hive_accname: Optional[str]
```
and
```
class V4VItem(BaseModel):
    r_hash: str
    add_index: int
    value: int
    settle_date: int
    utc_datetime: datetime = None
    localtime: datetime = None
    details: V4VDetails
```

# The Background

For now I'm working on one very specific aspect. These new Podcasting 2.0 Certified RSS feeds which @threespeak generates include what is called a "Value Block". This looks like:

```
<podcast:value type="lightning" method="keysend" suggested="0.00000050000">
  <podcast:valueRecipient name="brianoflondon via 3Speak" address="0396693dee59afd67f178af392990d907d3a9679fa7ce00e806b8e373ff6b70bd8" type="node" split="99"></podcast:valueRecipient>
  <podcast:valueRecipient name="PodcastIndex" address="03ae9f91a0cb8ff43840e3c322c4c61f019d8c1c3cea15a25cfc425ac605e61a4a" type="node" fee="True" split="1"></podcast:valueRecipient>
</podcast:value>
```

When someone listens to a podcast with a block like that in the RSS on one of the new [streaming sats enabled Podcasting 2.0 apps from newpodcastapps.com](http://newpodcastapps.com/) they can automatically send a small payment to the creator via the Lightning network. They can also send boosts and now messages too.

One day, perhaps, we'll have Hive as a native option in the system but for now the main dev effort has gone into the Lightning network. Unfortunately receiving Lightning is a non trivial option as it generally involves having a node on the Bitcoin network running 24/7. 

So for now one Lightning Node is going to receive payments on behalf of 3speak video creators and forward those as Hive transfers along with any messages or notes that come in.


----

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