ortutay
11 years ago
1 changed files with 312 additions and 0 deletions
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import PyQt4 |
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import sys |
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import PyQt4.QtCore as QtCore |
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import base64 |
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import urllib |
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import re |
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import time |
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import os |
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import httplib |
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import datetime |
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import json |
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import string |
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from urllib import urlencode |
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from PyQt4.QtGui import * |
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from PyQt4.QtCore import * |
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from PyQt4.QtWebKit import QWebView |
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from electrum import BasePlugin |
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from electrum.i18n import _, set_language |
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from electrum.util import user_dir |
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from electrum.util import appdata_dir |
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from electrum.util import format_satoshis |
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from electrum_gui.qt import ElectrumGui |
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SATOSHIS_PER_BTC = float(100000000) |
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COINBASE_ENDPOINT = 'https://coinbase.com' |
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SCOPE = 'buy' |
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REDIRECT_URI = 'urn:ietf:wg:oauth:2.0:oob' |
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TOKEN_URI = 'https://coinbase.com/oauth/token' |
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CLIENT_ID = '0a930a48b5a6ea10fb9f7a9fec3d093a6c9062ef8a7eeab20681274feabdab06' |
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CLIENT_SECRET = 'f515989e8819f1822b3ac7a7ef7e57f755c9b12aee8f22de6b340a99fd0fd617' |
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# Expiry is stored in RFC3339 UTC format |
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EXPIRY_FORMAT = '%Y-%m-%dT%H:%M:%SZ' |
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class Plugin(BasePlugin): |
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def fullname(self): return 'Coinbase BuyBack' |
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def description(self): return 'After sending bitcoin, prompt the user with the option to rebuy them via Coinbase.\n\nMarcell Ortutay, 1FNGQvm29tKM7y3niq63RKi7Qbg7oZ3jrB' |
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def __init__(self, gui, name): |
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BasePlugin.__init__(self, gui, name) |
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self._is_available = self._init() |
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def _init(self): |
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return True |
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def is_available(self): |
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return self._is_available |
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def enable(self): |
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return BasePlugin.enable(self) |
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def receive_tx(self, tx, wallet): |
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domain = wallet.get_account_addresses(None) |
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is_relevant, is_send, v, fee = tx.get_value(domain, wallet.prevout_values) |
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if isinstance(self.gui, ElectrumGui): |
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try: |
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web = propose_rebuy_qt(abs(v)) |
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except OAuth2Exception as e: |
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rm_local_oauth_credentials() |
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# TODO(ortutay): android flow |
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def propose_rebuy_qt(amount): |
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web = QWebView() |
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box = QMessageBox() |
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box.setFixedSize(200, 200) |
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credentials = read_local_oauth_credentials() |
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questionText = _('Rebuy ') + format_satoshis(amount) + _(' BTC?') |
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if credentials: |
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credentials.refresh() |
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if credentials and not credentials.invalid: |
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credentials.store_locally() |
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totalPrice = get_coinbase_total_price(credentials, amount) |
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questionText += _('\n(Price: ') + totalPrice + _(')') |
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if not question(box, questionText): |
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return |
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if credentials: |
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do_buy(credentials, amount) |
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else: |
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do_oauth_flow(web, amount) |
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return web |
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def do_buy(credentials, amount): |
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conn = httplib.HTTPSConnection('coinbase.com') |
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credentials.authorize(conn) |
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params = { |
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'qty': float(amount)/SATOSHIS_PER_BTC, |
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'agree_btc_amount_varies': False |
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} |
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resp = conn.auth_request('POST', '/api/v1/buys', urlencode(params), None) |
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if resp.status != 200: |
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message(_('Error, could not buy bitcoin')) |
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return |
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content = json.loads(resp.read()) |
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if content['success']: |
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message(_('Success!\n') + content['transfer']['description']) |
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else: |
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if content['errors']: |
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message(_('Error: ') + string.join(content['errors'], '\n')) |
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else: |
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message(_('Error, could not buy bitcoin')) |
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def get_coinbase_total_price(credentials, amount): |
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conn = httplib.HTTPSConnection('coinbase.com') |
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params={'qty': amount/SATOSHIS_PER_BTC} |
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conn.request('GET', '/api/v1/prices/buy?' + urlencode(params)) |
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resp = conn.getresponse() |
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if resp.status != 200: |
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return 'unavailable' |
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content = json.loads(resp.read()) |
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return '$' + content['total']['amount'] |
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def do_oauth_flow(web, amount): |
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# QT expects un-escaped URL |
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auth_uri = step1_get_authorize_url() |
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web.load(QUrl(auth_uri)) |
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web.setFixedSize(500, 700) |
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web.show() |
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web.titleChanged.connect(lambda(title): complete_oauth_flow(title, web, amount) if re.search('^[a-z0-9]+$', title) else False) |
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def complete_oauth_flow(token, web, amount): |
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web.close() |
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credentials = step2_exchange(str(token)) |
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credentials.store_locally() |
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do_buy(credentials, amount) |
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def token_path(): |
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dir = user_dir() + '/coinbase_buyback' |
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if not os.access(dir, os.F_OK): |
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os.mkdir(dir) |
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return dir + '/token' |
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def read_local_oauth_credentials(): |
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if not os.access(token_path(), os.F_OK): |
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return None |
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f = open(token_path(), 'r') |
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data = f.read() |
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f.close() |
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try: |
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credentials = Credentials.from_json(data) |
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return credentials |
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except Exception as e: |
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return None |
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def rm_local_oauth_credentials(): |
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os.remove(token_path()) |
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def step1_get_authorize_url(): |
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return ('https://coinbase.com/oauth/authorize' |
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+ '?scope=' + SCOPE |
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+ '&redirect_uri=' + REDIRECT_URI |
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+ '&response_type=code' |
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+ '&client_id=' + CLIENT_ID |
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+ '&access_type=offline') |
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def step2_exchange(code): |
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body = urllib.urlencode({ |
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'grant_type': 'authorization_code', |
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'client_id': CLIENT_ID, |
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'client_secret': CLIENT_SECRET, |
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'code': code, |
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'redirect_uri': REDIRECT_URI, |
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'scope': SCOPE, |
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}) |
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headers = { |
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'content-type': 'application/x-www-form-urlencoded', |
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} |
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conn = httplib.HTTPSConnection('coinbase.com') |
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conn.request('POST', TOKEN_URI, body, headers) |
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resp = conn.getresponse() |
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if resp.status == 200: |
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d = json.loads(resp.read()) |
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access_token = d['access_token'] |
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refresh_token = d.get('refresh_token', None) |
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token_expiry = None |
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if 'expires_in' in d: |
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token_expiry = datetime.datetime.utcnow() + datetime.timedelta( |
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seconds=int(d['expires_in'])) |
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return Credentials(access_token, refresh_token, token_expiry) |
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else: |
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raise OAuth2Exception(content) |
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class OAuth2Exception(Exception): |
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"""An error related to OAuth2""" |
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class Credentials(object): |
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def __init__(self, access_token, refresh_token, token_expiry): |
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self.access_token = access_token |
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self.refresh_token = refresh_token |
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self.token_expiry = token_expiry |
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# Indicates a failed refresh |
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self.invalid = False |
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def to_json(self): |
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token_expiry = self.token_expiry |
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if (token_expiry and isinstance(token_expiry, datetime.datetime)): |
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token_expiry = token_expiry.strftime(EXPIRY_FORMAT) |
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d = { |
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'access_token': self.access_token, |
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'refresh_token': self.refresh_token, |
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'token_expiry': token_expiry, |
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} |
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return json.dumps(d) |
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def store_locally(self): |
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f = open(token_path(), 'w') |
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f.write(self.to_json()) |
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f.close() |
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@classmethod |
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def from_json(cls, s): |
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data = json.loads(s) |
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if ('token_expiry' in data |
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and not isinstance(data['token_expiry'], datetime.datetime)): |
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try: |
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data['token_expiry'] = datetime.datetime.strptime( |
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data['token_expiry'], EXPIRY_FORMAT) |
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except: |
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data['token_expiry'] = None |
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retval = Credentials( |
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data['access_token'], |
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data['refresh_token'], |
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data['token_expiry']) |
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return retval |
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def apply(self, headers): |
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headers['Authorization'] = 'Bearer ' + self.access_token |
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def authorize(self, conn): |
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request_orig = conn.request |
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def new_request(method, uri, params, headers): |
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if headers == None: |
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headers = {} |
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self.apply(headers) |
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request_orig(method, uri, params, headers) |
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resp = conn.getresponse() |
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if resp.status == 401: |
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# Refresh and try again |
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self._refresh(request_orig) |
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self.store_locally() |
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self.apply(headers) |
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request_orig(method, uri, params, headers) |
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return conn.getresponse() |
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else: |
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return resp |
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conn.auth_request = new_request |
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return conn |
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def refresh(self): |
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try: |
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self._refresh() |
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except OAuth2Exception as e: |
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rm_local_oauth_credentials() |
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self.invalid = True |
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raise e |
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def _refresh(self): |
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conn = httplib.HTTPSConnection('coinbase.com') |
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body = urllib.urlencode({ |
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'grant_type': 'refresh_token', |
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'refresh_token': self.refresh_token, |
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'client_id': CLIENT_ID, |
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'client_secret': CLIENT_SECRET, |
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}) |
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headers = { |
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'content-type': 'application/x-www-form-urlencoded', |
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} |
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conn.request('POST', TOKEN_URI, body, headers) |
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resp = conn.getresponse() |
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if resp.status == 200: |
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d = json.loads(resp.read()) |
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self.token_response = d |
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self.access_token = d['access_token'] |
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self.refresh_token = d.get('refresh_token', self.refresh_token) |
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if 'expires_in' in d: |
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self.token_expiry = datetime.timedelta( |
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seconds=int(d['expires_in'])) + datetime.datetime.utcnow() |
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else: |
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raise OAuth2Exception('Refresh failed, ' + content) |
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def message(msg): |
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box = QMessageBox() |
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box.setFixedSize(200, 200) |
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return QMessageBox.information(box, _('Message'), msg) |
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def question(widget, msg): |
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return (QMessageBox.question( |
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widget, _('Message'), msg, QMessageBox.Yes | QMessageBox.No, QMessageBox.No) |
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== QMessageBox.Yes) |
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def main(): |
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app = QApplication(sys.argv) |
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print sys.argv[1] |
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propose_rebuy_qt(int(sys.argv[1])) |
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sys.exit(app.exec_()) |
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|
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if __name__ == "__main__": |
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main() |
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