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from django.core.serializers.json import DjangoJSONEncoder
from django.conf import settings
import requests
from datetime import datetime, timedelta
from decimal import Decimal
import json
import re
import uuid
from .models import TransferwiseRefund
class TransferwiseApi(object):
def __init__(self, pm):
self.pm = pm
self.session = requests.session()
self.session.headers.update({
'Authorization': 'Bearer {}'.format(self.pm.config('apikey')),
})
self.profile = self.account = None
def format_date(self, dt):
return dt.strftime('%Y-%m-%dT00:00:00.000Z')
def parse_datetime(self, s):
return datetime.strptime(s, '%Y-%m-%dT%H:%M:%S.%fZ')
def _get(self, suburl, params=None, stream=False):
r = self.session.get(
'https://api.transferwise.com/v1/{}'.format(suburl),
params=params,
stream=stream,
)
if r.status_code != 200:
r.raise_for_status()
return r
def get(self, suburl, params=None):
return self._get(suburl, params, False).json()
def get_binary(self, suburl, params=None):
r = self._get(suburl, params, True)
r.raw.decode_content = True
return r.raw
def post(self, suburl, params):
j = json.dumps(params, cls=DjangoJSONEncoder)
r = self.session.post(
'https://api.transferwise.com/v1/{}'.format(suburl),
data=j,
headers={
'Content-Type': 'application/json',
},
)
r.raise_for_status()
return r.json()
def get_profile(self):
if not self.profile:
try:
self.profile = next((p['id'] for p in self.get('profiles') if p['type'] == 'business'))
except Exception as e:
raise Exception("Failed to get profile: {}".format(e))
pass
return self.profile
def get_account(self):
if not self.account:
try:
self.account = next((a for a in self.get('borderless-accounts', {'profileId': self.get_profile()}) if a['balances'][0]['currency'] == settings.CURRENCY_ABBREV))
except Exception as e:
raise Exception("Failed to get account: {}".format(e))
return self.account
def get_balance(self):
for b in self.get_account()['balances']:
if b['currency'] == settings.CURRENCY_ABBREV:
return Decimal(b['amount']['value']).quantize(Decimal('0.01'))
return None
def get_transactions(self, startdate=None, enddate=None):
if not enddate:
enddate = (datetime.today() + timedelta(days=1)).date()
if not startdate:
startdate = enddate - timedelta(days=60)
return self.get(
'borderless-accounts/{0}/statement.json'.format(self.get_account()['id']),
{
'currency': settings.CURRENCY_ABBREV,
'intervalStart': self.format_date(startdate),
'intervalEnd': self.format_date(enddate),
},
)['transactions']
def validate_iban(self, iban):
return self.get('validators/iban?iban={}'.format(iban))['validation'] == 'success'
def get_structured_amount(self, amount):
if amount['currency'] != settings.CURRENCY_ABBREV:
raise Exception("Invalid currency {} found, exepcted {}".format(amount['currency'], settings.CURRENCY_ABBREV))
return Decimal(amount['value']).quantize(Decimal('0.01'))
def refund_transaction(self, origtrans, refundid, refundamount, refundstr):
if not origtrans.counterpart_valid_iban:
raise Exception("Cannot refund transaction without valid counterpart IBAN!")
# This is a many-step process, unfortunately complicated.
twr = TransferwiseRefund(origtransaction=origtrans, uuid=uuid.uuid4(), refundid=refundid)
(accid, quoteid, transferid) = self.make_transfer(origtrans.counterpart_name,
origtrans.counterpart_account,
refundamount,
refundstr,
twr.uuid,
)
twr.accid = accid
twr.quoteid = quoteid
twr.transferid = transferid
twr.save()
return twr.id
def make_transfer(self, counterpart_name, counterpart_account, amount, reference, xuuid):
# Create a recipient account
acc = self.post(
'accounts',
{
'profile': self.get_profile(),
'currency': settings.CURRENCY_ABBREV,
'accountHolderName': re.sub(r'\d+', '', counterpart_name.replace(',', ' ')),
'type': 'iban',
'details': {
'IBAN': counterpart_account,
},
}
)
accid = acc['id']
# Create a quote (even though we're not doing currency exchange)
quote = self.post(
'quotes',
{
'profile': self.get_profile(),
'source': settings.CURRENCY_ABBREV,
'target': settings.CURRENCY_ABBREV,
'rateType': 'FIXED',
'targetAmount': amount,
'type': 'BALANCE_PAYOUT',
},
)
quoteid = quote['id']
# Create the actual transfer
transfer = self.post(
'transfers',
{
'targetAccount': accid,
'quote': quoteid,
'customerTransactionId': str(xuuid),
'details': {
'reference': reference,
},
},
)
transferid = transfer['id']
# Fund the transfer from our account
fund = self.post(
'transfers/{0}/payments'.format(transferid),
{
'type': 'BALANCE',
},
)
return (accid, quoteid, transferid)
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