137 lines
4.4 KiB
Python
137 lines
4.4 KiB
Python
"""Nordnet Depository fetching for Nordnet, the scandinavian investment bank.
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This fetcher uses the [Nordnet
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API](https://www.nordnet.dk/externalapi/docs/api), which requires a Nordnet
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account.
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Some of the code here is based on [Morten Helmstedt's Nordnet
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utilities](https://github.com/helmstedt/nordnet-utilities/blob/main/nordnet_login.py).
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I am grateful for his pioneering work.
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"""
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import datetime
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import logging
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from decimal import Decimal
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import fin_defs
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from .data import Depo, DepoGroup, DepoSingle
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logger = logging.getLogger(__name__)
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API_HOSTNAME = 'public.nordnet.dk'
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API_ROOT = f'https://{API_HOSTNAME}/api/2'
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API_LOGIN_STEP_1 = 'https://www.nordnet.dk/logind'
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API_LOGIN_STEP_2 = API_ROOT + '/authentication/basic/login'
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API_ACCOUNTS = API_ROOT + '/accounts'
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API_ACCOUNT_INFO = API_ROOT + '/accounts/{accid}/info'
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API_ACCOUNT_LEDGERS = API_ROOT + '/accounts/{accid}/ledgers'
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API_ACCOUNT_POSITIONS = API_ROOT + '/accounts/{accid}/positions'
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def asset_from_instrument_json(json) -> fin_defs.Asset | None:
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if json['instrument_group_type'] == 'FND':
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return None
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symbol = json['symbol']
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exchange_id = json['tradables'][0]['mic']
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return fin_defs.Stock(symbol, fin_defs.EXCHANGES_BY_IDS[exchange_id])
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class NordnetDepoFetcher:
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def __init__(self, session, username: str, password: str):
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assert session is not None, 'missing session'
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self.session = session
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self.username = username
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self.password = password
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self.is_logged_in = False
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def get_json(self, url: str, params: dict[str, str | int] = {}) -> dict:
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if not url.startswith(API_ROOT):
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msg = f'Given url must be located below API ROOT: {url}'
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raise ValueError(msg)
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headers = {
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'Accepts': 'application/json',
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}
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response = self.session.get(url, params=params, headers=headers)
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json = response.json()
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response.raise_for_status()
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return json
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def login(self):
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"""Performs authentication with the login server if not already logged
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in. Does not need to be manually called; most methods that require this
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information will do it themselves.
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This method is based on Morten Helmstedt's version:
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<https://github.com/helmstedt/nordnet-utilities/blob/main/nordnet_login.py>
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"""
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if self.is_logged_in:
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return
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self.session.get(API_LOGIN_STEP_1)
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self.session.headers['client-id'] = 'NEXT'
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self.session.headers['sub-client-id'] = 'NEXT'
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response = self.session.post(
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API_LOGIN_STEP_2,
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data={'username': self.username, 'password': self.password},
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)
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response.raise_for_status()
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self.is_logged_in = True
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def get_depo(self) -> Depo:
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self.login()
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now = datetime.datetime.now(
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tz=datetime.UTC,
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) # TODO: Use info from json requests
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json_accounts = self.get_json(API_ACCOUNTS)
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nested = []
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for json_account in json_accounts:
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account_id = json_account['accid']
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assets: dict[fin_defs.Asset, Decimal] = {}
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# Determine amount of usable currency stored on Nordnet
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if True:
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json_account_info = self.get_json(
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API_ACCOUNT_INFO.format(accid=account_id),
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)
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asset = fin_defs.FiatCurrency(
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json_account_info[0]['account_sum']['currency'],
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)
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amount = Decimal(json_account_info[0]['account_sum']['value'])
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assets[asset] = amount
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del asset, amount
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# Determine positions on Nordnet
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json_account_positions = self.get_json(
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API_ACCOUNT_POSITIONS.format(accid=account_id),
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)
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for pos in json_account_positions:
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asset = asset_from_instrument_json(pos['instrument'])
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if asset is None:
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continue
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amount = Decimal(pos['qty'])
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assets[asset] = amount
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del asset, amount
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nested.append(
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DepoSingle(
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name='{} {}'.format(json_account['type'], json_account['alias']),
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_assets=assets,
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updated_time=now,
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),
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)
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return DepoGroup(
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name=f'Nordnet',
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updated_time=now,
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nested=nested,
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)
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