Tastytrade

What's Changed
- Fixes bug with certification session which prevents creation in v9.12

**Full Changelog**: https://github.com/tastyware/tastytrade/compare/v9.12...v9.13

What's Changed
- `NestedOptionChain.deliverables` is now optional, as sandbox sessions often don't include it
- Add session token and streamer token expiration information to session
- Better error handling and reconnection callbacks in streamer

**Full Changelog**: https://github.com/tastyware/tastytrade/compare/v9.11...v9.12

What's Changed
* added refresh_interval to subscribe method by CosmicTrader in https://github.com/tastyware/tastytrade/pull/221

Frequency of streamed events can now be changed on a per-event basis:
python
await streamer.subscribe(Quote, ['AAPL', 'MSFT'], refresh_interval=0.5)

* added a new session, `OAuthSession`, for users who have been granted Tastytrade OAuth access

python
from tastytrade.session import OAuthSession
session = OAuthSession('provider_secret', 'refresh_token')

This session can be used in most of the same places as a normal session, allowing you to manage connected user accounts.
* fixes bug in 222 due to tastytrade changing their account streamer API

New Contributors
* CosmicTrader made their first contribution in https://github.com/tastyware/tastytrade/pull/221

**Full Changelog**: https://github.com/tastyware/tastytrade/compare/v9.10...v9.11

What's Changed
* Feature/market sessions by JBlohm in https://github.com/tastyware/tastytrade/pull/215

Adds a new module, `market_sessions` to the SDK which implements the new API endpoints used for checking exchange status and market calendars. This is an alternative to some of the utility functions in `tastytrade.utils` which uses Tastytrade endpoints. Check out the new docs page [here](https://tastyworks-api.readthedocs.io/en/latest/market-sessions.html)!

* add proxies by Graeme22 in https://github.com/tastyware/tastytrade/pull/216

This adds a new optional parameter, `proxy`, to the `Session` class to proxy all requests through a proxy server. Proxies will also apply to all web socket connections (so `DXLinkStreamer` and `AlertStreamer`) created with that session.
python
session = Session('username', 'password', proxy="http://user:pass127.0.0.1:8080")
accounts = Account.get_accounts(session) proxied!
async with DXLinkStreamer(session) as streamer: proxied!
...


* sessions now have a context manager, which can be used like this:
python
with Session('username', 'password') as session:
...

which is equivalent to:
python
session = Session('username', 'password')
session.destroy()


**Full Changelog**: https://github.com/tastyware/tastytrade/compare/v9.9...v9.10

What's Changed
* Added missing: `used_derivative_buying_power` data field by JBlohm in https://github.com/tastyware/tastytrade/pull/210. This allows you to calculate buying power usage in the same way Tasty does it. This can be accessed as `AccountBalance.used_derivative_buying_power` and `AccountBalanceSnapshot.used_derivative_buying_power`.
* add streamer refresh interval by Graeme22 in https://github.com/tastyware/tastytrade/pull/212, many thanks to bonkzwonil for opening #211!
Previously, the dubiously named "acceptAggregationPeriod" parameter to newly created DXLink channels was hardcoded to 10 seconds. This resulted in events like Quote being updated only once every 10 seconds, a far cry from live streaming! Now this value is adjustable as a new parameter to `DXLinkStreamer`, but it defaults to 0.1 which should be close to live for most use cases.

Example usage:
python
streamer = await DXLinkStreamer(session, refresh_interval=5)

Since the new default is 0.1, most users should immediately see a benefit without making any changes at all.

New Contributors
* JBlohm made their first contribution in https://github.com/tastyware/tastytrade/pull/210

**Full Changelog**: https://github.com/tastyware/tastytrade/compare/v9.8...v9.9

What's Changed
* notional orders support by Graeme22 in https://github.com/tastyware/tastytrade/pull/207, thanks to vadimtk for opening #206 and noticing this issue!
You can now place notional market orders like so:
python
symbol = Equity.get_equity(session, 'AAPL')
order = NewOrder(
time_in_force=OrderTimeInForce.DAY,
order_type=OrderType.NOTIONAL_MARKET,
value=Decimal(-10), $10 debit, this will result in fractional shares
legs=[
symbol.build_leg(None, OrderAction.BUY_TO_OPEN),
]
)
resp = account.place_order(session, order, dry_run=False)

* Streamer shutdown bug fixed in 7928e9b, see 194, 205. Thanks to militantwalrus for helping identify the issue!
* Add note about using is_test and remember_token for additional sessions by danstever in https://github.com/tastyware/tastytrade/pull/203
* order source field is now present for placed orders, detected by salamad in 204
* unit tests are now fully annotated for type safety
* renames three internal utility functions, `_set_sign_for`, `_get_sign`, and `_validate_response` to not use a leading underscore in utils.py, since they are used in various modules.

New Contributors
* danstever made their first contribution in https://github.com/tastyware/tastytrade/pull/203

**Full Changelog**: https://github.com/tastyware/tastytrade/compare/v9.7...v9.8