def attempt(self):
"""
Try to perform this payment.
"""
self.last_attempted_at = datetime.now()
# Write attempted date now so if something happens we can see this
# payment was interrupted.
self.save()
try:
flow_graph = FlowGraph(self.payer, self.recipient)
flow_links = flow_graph.min_cost_flow(self.amount)
with transaction.commit_on_success(using='ripple'):
for creditline, amount in flow_links:
Entry.objects.create_entry(
self, creditline.account, -amount * creditline.bal_mult,
creditline.limit)
self.status = 'completed'
self.save()
except BaseException as exc:
# TODO: Handle collisions better here so we can retry or give the
# user an informative error message, rather than the server error page.
self.status = 'failed'
self.save()
if not isinstance(exc, PaymentError):
raise
def attempt(self):
"""
Try to perform this payment.
"""
self.last_attempted_at = datetime.now()
# Write attempted date now so if something happens we can see this
# payment was interrupted.
self.save()
changed_accounts = []
try:
flow_graph = FlowGraph(self.payer, self.recipient)
flow_links = flow_graph.min_cost_flow(self.amount)
with transaction.atomic(using='ripple'):
for creditline_id, amount in flow_links:
creditline = CreditLine.objects.get(pk=creditline_id)
Entry.objects.create_entry(self, creditline.account,
-amount * creditline.bal_mult,
creditline.limit)
changed_accounts.append(creditline.account)
self.status = 'completed'
self.save()
except BaseException as exc:
# TODO: Handle collisions better here so we can retry or give the
# user an informative error message, rather than the server error page.
self.status = 'failed'
self.save()
if not isinstance(exc, PaymentError):
raise
# Update cached graphs.
for account in changed_accounts:
for creditline in (account.pos_creditline, account.neg_creditline):
update_creditline_in_cached_graphs(creditline)
def attempt(self):
"""
Try to perform this payment.
"""
self.last_attempted_at = datetime.now()
# Write attempted date now so if something happens we can see this
# payment was interrupted.
self.save()
changed_accounts = []
try:
flow_graph = FlowGraph(self.payer, self.recipient)
flow_links = flow_graph.min_cost_flow(self.amount)
with transaction.commit_on_success(using="ripple"):
for creditline_id, amount in flow_links:
creditline = CreditLine.objects.get(pk=creditline_id)
Entry.objects.create_entry(
self, creditline.account, -amount * creditline.bal_mult, creditline.limit
)
changed_accounts.append(creditline.account)
self.status = "completed"
self.save()
except BaseException as exc:
# TODO: Handle collisions better here so we can retry or give the
# user an informative error message, rather than the server error page.
self.status = "failed"
self.save()
if not isinstance(exc, PaymentError):
raise
# Update cached graphs.
for account in changed_accounts:
for creditline in (account.pos_creditline, account.neg_creditline):
update_creditline_in_cached_graphs(creditline)
def credit_reputation(target, asker):
version = _reputation_cache_version()
key = 'credit_reputation(%s,%s)' % (repr(target), repr(asker))
val = cache.get(key, version=version)
if val is None:
flow_graph = FlowGraph(target, asker, ignore_balances=True)
val = flow_graph.max_flow()
cache.set(key, val, None, version=version)
return val
def credit_reputation(target, asker):
version = _reputation_cache_version()
key = 'credit_reputation(%s,%s)' % (repr(target), repr(asker))
val = cache.get(key, version=version)
if val is None:
flow_graph = FlowGraph(target, asker, ignore_balances=True)
val = flow_graph.max_flow()
cache.set(key, val, None, version=version)
return val
def max_payment(payer, recipient):
flow_graph = FlowGraph(payer, recipient)
return flow_graph.max_flow()
def max_payment(payer, recipient):
flow_graph = FlowGraph(payer, recipient)
return flow_graph.max_flow()
