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116 lines
3.8 KiB
Python
116 lines
3.8 KiB
Python
# Twisted/Klein imports
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from twisted.logger import Logger
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from twisted.internet.task import LoopingCall
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# Other library imports
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import requests
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from simplejson.errors import JSONDecodeError
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from time import time
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import urllib
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# Project imports
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from settings import settings
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class TrueLayer(object):
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"""
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Class to manage calls to Open Banking APIs through TrueLayer.
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"""
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def __init__(self):
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self.log = Logger("truelayer")
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self.token = None
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self.lc = LoopingCall(self.get_new_token)
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self.lc.start(int(settings.TrueLayer.RefreshSec))
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def setup_auth(self):
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pass
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def create_auth_url(self):
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query = urllib.parse.urlencode(
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{
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"response_type": "code",
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"response_mode": "form_post",
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"client_id": settings.TrueLayer.ID,
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"scope": "info accounts balance transactions offline_access",
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"nonce": int(time()),
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"redirect_uri": settings.TrueLayer.CallbackURL,
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"enable_mock": "true",
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}
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)
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auth_uri = f"{settings.TrueLayer.AuthBase}/?{query}&redirect_uri={settings.TrueLayer.CallbackURL}"
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return auth_uri
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def handle_authcode_received(self, authcode):
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data = {
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"client_id": settings.TrueLayer.ID,
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"client_secret": settings.TrueLayer.Key,
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"code": authcode,
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"grant_type": "authorization_code",
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"redirect_uri": settings.TrueLayer.CallbackURL,
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}
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r = requests.post(f"{settings.TrueLayer.AuthBase}/connect/token", data=data)
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try:
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parsed = r.json()
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except JSONDecodeError:
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return False
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if "error" in parsed:
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self.log.error("Error requesting refresh token: {error}", error=parsed["error"])
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return False
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settings.TrueLayer.RefreshToken = parsed["refresh_token"]
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settings.TrueLayer.AuthCode = authcode
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settings.write()
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self.token = parsed["access_token"]
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self.log.info("Retrieved access/refresh tokens - TrueLayer")
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def get_new_token(self, fail=False):
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"""
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Exchange our refresh token for an access token.
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"""
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if not settings.TrueLayer.RefreshToken:
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return
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headers = {"Content-Type": "application/x-www-form-urlencoded"}
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data = {
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"grant_type": "refresh_token",
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"refresh_token": settings.TrueLayer.RefreshToken,
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"client_id": settings.TrueLayer.ID,
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"client_secret": settings.TrueLayer.Key,
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}
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r = requests.post(f"{settings.TrueLayer.AuthBase}/connect/token", data=data, headers=headers)
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try:
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parsed = r.json()
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except JSONDecodeError:
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if fail:
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exit()
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return False
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if r.status_code == 200:
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if "access_token" in parsed.keys():
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self.token = parsed["access_token"]
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self.log.info("Refreshed access token - TrueLayer")
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return True
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else:
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self.log.error(f"Token refresh didn't contain access token: {parsed}", parsed=parsed)
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if fail:
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exit()
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return False
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else:
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self.log.error(f"Cannot refresh token: {parsed}", parsed=parsed)
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if fail:
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exit()
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return False
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def get_accounts(self):
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"""
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Get a list of accounts.
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"""
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headers = {"Authorization": f"Bearer {self.token}"}
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path = f"{settings.TrueLayer.DataBase}/accounts"
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r = requests.get(path, headers=headers)
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try:
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parsed = r.json()
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except JSONDecodeError:
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self.log.error("Error parsing institutions response: {content}", content=r.content)
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return False
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return parsed
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