def create_chain(num=10):
priv_key = signer.generate_privkey()
pub_key = signer.generate_pubkey(priv_key)
counter = 1
previous_block_id = "0000000000000000"
blocks = []
while counter <= num:
current_block_id = uuid4().hex
txns = [
t[0] for t in [
create_transaction(payload=uuid4().hex.encode(),
private_key=priv_key,
public_key=pub_key) for _ in range(20)
]
]
txn_ids = [t.header_signature for t in txns]
batch = create_batch(transactions=txns,
public_key=pub_key,
private_key=priv_key)
blk_w = create_block(counter,
previous_block_id,
current_block_id,
batches=[batch])
blocks.append((current_block_id, blk_w, txn_ids))
counter += 1
previous_block_id = current_block_id
return blocks
def test_add_to_finalized_scheduler(self):
"""Tests that a finalized scheduler raise exception on add_batch().
This test creates a scheduler, finalizes it, and calls add_batch().
The result is expected to be a SchedulerError, since adding a batch
to a finalized scheduler is invalid.
"""
private_key = signing.generate_privkey()
public_key = signing.generate_pubkey(private_key)
# Finalize prior to attempting to add a batch.
self.scheduler.finalize()
txn, _ = create_transaction(payload='a'.encode(),
private_key=private_key,
public_key=public_key)
batch = create_batch(transactions=[txn],
private_key=private_key,
public_key=public_key)
# scheduler.add_batch(batch) should throw a SchedulerError due to
# the finalized status of the scheduler.
self.assertRaises(SchedulerError,
lambda: self.scheduler.add_batch(batch))
def test_set_result_on_unscheduled_txn(self):
"""Tests that a scheduler will reject a result on an unscheduled
transaction.
Creates a batch with a single transaction, adds the batch to the
scheduler, then immediately attempts to set the result for the
transaction without first causing it to be scheduled (by using an
iterator or calling next_transaction()).
"""
private_key = signing.generate_privkey()
public_key = signing.generate_pubkey(private_key)
txn, _ = create_transaction(payload='a'.encode(),
private_key=private_key,
public_key=public_key)
batch = create_batch(transactions=[txn],
private_key=private_key,
public_key=public_key)
self.scheduler.add_batch(batch)
self.assertRaises(
SchedulerError,
lambda: self.scheduler.set_transaction_execution_result(
txn.header_signature, False, None))
def create_chain(num=10):
context = create_context('secp256k1')
private_key = context.new_random_private_key()
crypto_factory = CryptoFactory(context)
signer = crypto_factory.new_signer(private_key)
counter = 1
previous_block_id = "0000000000000000"
blocks = []
while counter <= num:
current_block_id = uuid4().hex
txns = [
t[0] for t in [
create_transaction(payload=uuid4().hex.encode(), signer=signer)
for _ in range(20)
]
]
txn_ids = [t.header_signature for t in txns]
batch = create_batch(transactions=txns, signer=signer)
blk_w = create_block(counter,
previous_block_id,
current_block_id,
batches=[batch])
blocks.append((current_block_id, blk_w, txn_ids))
counter += 1
previous_block_id = current_block_id
return blocks
def test_set_status(self):
"""Tests that set_status() has the correct behavior.
Basically:
1. Adds a batch which has two transactions.
2. Calls next_transaction() to get the first Transaction.
3. Calls next_transaction() to verify that it returns None.
4. Calls set_status() to mark the first transaction applied.
5. Calls next_transaction() to get the second Transaction.
Step 3 returns None because the first transaction hasn't been marked
as applied, and the SerialScheduler will only return one
not-applied Transaction at a time.
Step 5 is expected to return the second Transaction, not None,
since the first Transaction was marked as applied in the previous
step.
"""
private_key = signing.generate_privkey()
public_key = signing.generate_pubkey(private_key)
txns = []
for name in ['a', 'b']:
txn, _ = create_transaction(
payload=name.encode(),
private_key=private_key,
public_key=public_key)
txns.append(txn)
batch = create_batch(
transactions=txns,
private_key=private_key,
public_key=public_key)
self.scheduler.add_batch(batch)
scheduled_txn_info = self.scheduler.next_transaction()
self.assertIsNotNone(scheduled_txn_info)
self.assertEqual('a', scheduled_txn_info.txn.payload.decode())
self.assertIsNone(self.scheduler.next_transaction())
c_id = self.context_manager.create_context(
self.first_state_root,
base_contexts=scheduled_txn_info.base_context_ids,
inputs=[],
outputs=[])
self.scheduler.set_transaction_execution_result(
scheduled_txn_info.txn.header_signature,
is_valid=True,
context_id=c_id)
scheduled_txn_info = self.scheduler.next_transaction()
self.assertIsNotNone(scheduled_txn_info)
self.assertEqual('b', scheduled_txn_info.txn.payload.decode())
def test_transaction_order(self):
"""Tests the that transactions are returned in order added.
Adds three batches with varying number of transactions, then tests
that they are returned in the appropriate order when using an iterator.
This test also creates a second iterator and verifies that both
iterators return the same transactions.
This test also finalizes the scheduler and verifies that StopIteration
is thrown by the iterator.
"""
private_key = signing.generate_privkey()
public_key = signing.generate_pubkey(private_key)
txns = []
for names in [['a', 'b', 'c'], ['d', 'e'], ['f', 'g', 'h', 'i']]:
batch_txns = []
for name in names:
txn, _ = create_transaction(
payload=name.encode(),
private_key=private_key,
public_key=public_key)
batch_txns.append(txn)
txns.append(txn)
batch = create_batch(
transactions=batch_txns,
private_key=private_key,
public_key=public_key)
self.scheduler.add_batch(batch)
self.scheduler.finalize()
iterable1 = iter(self.scheduler)
iterable2 = iter(self.scheduler)
for txn in txns:
scheduled_txn_info = next(iterable1)
self.assertEqual(scheduled_txn_info, next(iterable2))
self.assertIsNotNone(scheduled_txn_info)
self.assertEqual(txn.payload, scheduled_txn_info.txn.payload)
c_id = self.context_manager.create_context(
self.first_state_root,
base_contexts=scheduled_txn_info.base_context_ids,
inputs=[],
outputs=[])
self.scheduler.set_transaction_execution_result(
txn.header_signature, True, c_id)
with self.assertRaises(StopIteration):
next(iterable1)
def test_unschedule_incomplete_transactions(self):
"""Tests that unschedule_incomplete_batches will remove
batches above the mimimum.
Given a schedule with two batches, ensure that a call to
unschedule_incomplete_batches will leave one batch in the schedule.
"""
private_key = self._context.new_random_private_key()
signer = self._crypto_factory.new_signer(private_key)
txn_a, _ = create_transaction(payload='A'.encode(), signer=signer)
txn_b, _ = create_transaction(payload='B'.encode(), signer=signer)
batch_1 = create_batch(transactions=[txn_a], signer=signer)
batch_2 = create_batch(transactions=[txn_b], signer=signer)
self.scheduler.add_batch(batch_1)
self.scheduler.add_batch(batch_2)
self.scheduler.unschedule_incomplete_batches()
self.scheduler.finalize()
self.assertFalse(self.scheduler.complete(block=False))
scheduled_txn_info = self.scheduler.next_transaction()
self.assertIsNotNone(scheduled_txn_info)
self.assertEqual('A', scheduled_txn_info.txn.payload.decode())
c_id = self.context_manager.create_context(
self.first_state_root,
base_contexts=scheduled_txn_info.base_context_ids,
inputs=[],
outputs=[])
self.scheduler.set_transaction_execution_result(
scheduled_txn_info.txn.header_signature,
is_valid=True,
context_id=c_id)
with self.assertRaises(StopIteration):
scheduled_txn_info = self.scheduler.next_transaction()
def test_completion_on_last_result(self):
"""Tests the that the schedule is not marked complete until the last
result is set.
Adds three batches with varying number of transactions, then tests
that they are returned in the appropriate order when using an iterator.
Test that the value of `complete` is false until the last value.
This test also finalizes the scheduler and verifies that StopIteration
is thrown by the iterator, and the complete is true in the at the end.
"""
private_key = signing.generate_privkey()
public_key = signing.generate_pubkey(private_key)
txns = []
for names in [['a', 'b', 'c'], ['d', 'e'], ['f', 'g', 'h', 'i']]:
batch_txns = []
for name in names:
txn, _ = create_transaction(
payload=name.encode(),
private_key=private_key,
public_key=public_key)
batch_txns.append(txn)
txns.append(txn)
batch = create_batch(
transactions=batch_txns,
private_key=private_key,
public_key=public_key)
self.scheduler.add_batch(batch)
self.scheduler.finalize()
iterable1 = iter(self.scheduler)
for txn in txns:
scheduled_txn_info = next(iterable1)
self.assertFalse(self.scheduler.complete(block=False))
c_id = self.context_manager.create_context(
self.first_state_root,
base_contexts=scheduled_txn_info.base_context_ids,
inputs=[],
outputs=[])
self.scheduler.set_transaction_execution_result(
txn.header_signature, True, c_id)
self.assertTrue(self.scheduler.complete(block=False))
with self.assertRaises(StopIteration):
next(iterable1)
def _completion_on_finalize(self, scheduler):
"""Tests that iteration will stop when finalized is called on an
otherwise complete scheduler.
Notes:
Adds one batch and transaction, then verifies the iterable returns
that transaction. Sets the execution result and then calls finalize.
Since the the scheduler is complete (all transactions have had
results set, and it's been finalized), we should get a StopIteration.
This check is useful in making sure the finalize() can occur after
all set_transaction_execution_result()s have been performed, because
in a normal situation, finalize will probably occur prior to those
calls.
This test should work for both a serial and parallel scheduler.
"""
private_key = signing.generate_privkey()
public_key = signing.generate_pubkey(private_key)
txn, _ = create_transaction(
payload='a'.encode(),
private_key=private_key,
public_key=public_key)
batch = create_batch(
transactions=[txn],
private_key=private_key,
public_key=public_key)
iterable = iter(scheduler)
scheduler.add_batch(batch)
scheduled_txn_info = next(iterable)
self.assertIsNotNone(scheduled_txn_info)
self.assertEqual(txn.payload, scheduled_txn_info.txn.payload)
scheduler.set_transaction_execution_result(
txn.header_signature, False, None)
scheduler.finalize()
with self.assertRaises(StopIteration):
next(iterable)
def _completion_on_finalize_only_when_done(self, scheduler):
"""Tests that complete will only be true when the scheduler
has had finalize called and all txns have execution result set.
Notes:
Adds one batch and transaction, then verifies the iterable returns
that transaction. Finalizes then sets the execution result. The
schedule should not be marked as complete until after the
execution result is set.
This check is useful in making sure the finalize() can occur after
all set_transaction_execution_result()s have been performed, because
in a normal situation, finalize will probably occur prior to those
calls.
This test should work for both a serial and parallel scheduler.
"""
private_key = signing.generate_privkey()
public_key = signing.generate_pubkey(private_key)
txn, _ = create_transaction(
payload='a'.encode(),
private_key=private_key,
public_key=public_key)
batch = create_batch(
transactions=[txn],
private_key=private_key,
public_key=public_key)
iterable = iter(scheduler)
scheduler.add_batch(batch)
scheduled_txn_info = next(iterable)
self.assertIsNotNone(scheduled_txn_info)
self.assertEqual(txn.payload, scheduled_txn_info.txn.payload)
scheduler.finalize()
self.assertFalse(scheduler.complete(block=False))
scheduler.set_transaction_execution_result(
txn.header_signature, False, None)
self.assertTrue(scheduler.complete(block=False))
with self.assertRaises(StopIteration):
next(iterable)
def create_chain(num=10):
context = create_context('secp256k1')
private_key = context.new_random_private_key()
crypto_factory = CryptoFactory(context)
signer = crypto_factory.new_signer(private_key)
counter = 1
previous_block_id = "0000000000000000"
blocks = []
while counter <= num:
current_block_id = uuid4().hex
txns = [
t[0]
for t in [
create_transaction(
payload=uuid4().hex.encode(), signer=signer)
for _ in range(20)
]
]
txn_ids = [t.header_signature for t in txns]
batch = create_batch(
transactions=txns,
signer=signer)
blk_w = create_block(
counter,
previous_block_id,
current_block_id,
batches=[batch])
blocks.append((current_block_id, blk_w, txn_ids))
counter += 1
previous_block_id = current_block_id
return blocks
def test_transaction_order_with_dependencies(self):
"""Tests the that transactions are returned in the expected order given
dependencies implied by state.
Creates one batch with four transactions.
"""
private_key = signing.generate_privkey()
public_key = signing.generate_pubkey(private_key)
txns = []
headers = []
txn, header = create_transaction(payload='a'.encode(),
private_key=private_key,
public_key=public_key)
txns.append(txn)
headers.append(header)
txn, header = create_transaction(payload='b'.encode(),
private_key=private_key,
public_key=public_key)
txns.append(txn)
headers.append(header)
txn, header = create_transaction(
payload='aa'.encode(),
private_key=private_key,
public_key=public_key,
inputs=['000000' + hashlib.sha512('a'.encode()).hexdigest()[:64]],
outputs=['000000' + hashlib.sha512('a'.encode()).hexdigest()[:64]])
txns.append(txn)
headers.append(header)
txn, header = create_transaction(
payload='bb'.encode(),
private_key=private_key,
public_key=public_key,
inputs=['000000' + hashlib.sha512('b'.encode()).hexdigest()[:64]],
outputs=['000000' + hashlib.sha512('b'.encode()).hexdigest()[:64]])
txns.append(txn)
headers.append(header)
batch = create_batch(transactions=txns,
private_key=private_key,
public_key=public_key)
self.scheduler.add_batch(batch)
self.scheduler.finalize()
self.assertFalse(self.scheduler.complete(block=False))
iterable = iter(self.scheduler)
scheduled_txn_info = []
self.assertEqual(2, self.scheduler.available())
scheduled_txn_info.append(next(iterable))
self.assertIsNotNone(scheduled_txn_info[0])
self.assertEqual(txns[0].payload, scheduled_txn_info[0].txn.payload)
self.assertFalse(self.scheduler.complete(block=False))
self.assertEqual(1, self.scheduler.available())
scheduled_txn_info.append(next(iterable))
self.assertIsNotNone(scheduled_txn_info[1])
self.assertEqual(txns[1].payload, scheduled_txn_info[1].txn.payload)
self.assertFalse(self.scheduler.complete(block=False))
self.assertEqual(0, self.scheduler.available())
context_id1 = self.context_manager.create_context(
state_hash=self.first_state_root,
inputs=list(headers[1].inputs),
outputs=list(headers[1].outputs),
base_contexts=[])
self.scheduler.set_transaction_execution_result(
txns[1].header_signature, True, context_id1)
self.assertEqual(1, self.scheduler.available())
scheduled_txn_info.append(next(iterable))
self.assertIsNotNone(scheduled_txn_info[2])
self.assertEqual(txns[3].payload, scheduled_txn_info[2].txn.payload)
self.assertFalse(self.scheduler.complete(block=False))
self.assertEqual(0, self.scheduler.available())
context_id2 = self.context_manager.create_context(
state_hash=self.first_state_root,
inputs=list(headers[0].inputs),
outputs=list(headers[0].outputs),
base_contexts=[context_id1])
self.scheduler.set_transaction_execution_result(
txns[0].header_signature, True, context_id2)
self.assertEqual(1, self.scheduler.available())
scheduled_txn_info.append(next(iterable))
self.assertIsNotNone(scheduled_txn_info[3])
self.assertEqual(txns[2].payload, scheduled_txn_info[3].txn.payload)
self.assertFalse(self.scheduler.complete(block=False))
self.assertEqual(0, self.scheduler.available())
context_id3 = self.context_manager.create_context(
state_hash=self.first_state_root,
inputs=list(headers[2].inputs),
outputs=list(headers[2].outputs),
base_contexts=[context_id2])
self.scheduler.set_transaction_execution_result(
txns[2].header_signature, True, context_id3)
context_id4 = self.context_manager.create_context(
state_hash=self.first_state_root,
inputs=list(headers[3].inputs),
outputs=list(headers[3].outputs),
base_contexts=[context_id3])
self.scheduler.set_transaction_execution_result(
txns[3].header_signature, True, context_id4)
self.assertEqual(0, self.scheduler.available())
self.assertTrue(self.scheduler.complete(block=False))
with self.assertRaises(StopIteration):
next(iterable)
result = self.scheduler.get_batch_execution_result(
batch.header_signature)
self.assertIsNotNone(result)
self.assertTrue(result.is_valid)
def _dependencies(self, scheduler, context_manager):
"""Tests that transactions dependent on other transactions will fail
their batch, if the dependency fails.
1 2 3 4 5
dependency--> B D F
[A, B, C] [D, E] [F] [G] [H]
x <------- invalid
Notes:
1. Add 5 batches with 8 txns with dependencies as in the diagram.
2. Run through the scheduler setting all the transaction results,
including the single invalid txn, C.
3. Assert the batch validity, that there are 2 valid batches,
3 and 5.
"""
private_key = signing.generate_privkey()
public_key = signing.generate_pubkey(private_key)
transaction_validity = {}
# 1.
txn_a, _ = create_transaction(payload='A'.encode(),
private_key=private_key,
public_key=public_key)
transaction_validity[txn_a.header_signature] = True
txn_b, _ = create_transaction(payload='B'.encode(),
private_key=private_key,
public_key=public_key)
transaction_validity[txn_b.header_signature] = True
txn_c, _ = create_transaction(payload='C'.encode(),
private_key=private_key,
public_key=public_key)
transaction_validity[txn_c.header_signature] = False
batch_1 = create_batch(transactions=[txn_a, txn_b, txn_c],
private_key=private_key,
public_key=public_key)
txn_d, _ = create_transaction(payload='D'.encode(),
private_key=private_key,
public_key=public_key)
transaction_validity[txn_d.header_signature] = True
txn_e, _ = create_transaction(payload='E'.encode(),
private_key=private_key,
public_key=public_key,
dependencies=[txn_b.header_signature])
transaction_validity[txn_e.header_signature] = True
batch_2 = create_batch(transactions=[txn_d, txn_e],
private_key=private_key,
public_key=public_key)
txn_f, _ = create_transaction(payload='F'.encode(),
private_key=private_key,
public_key=public_key)
transaction_validity[txn_f.header_signature] = True
batch_3 = create_batch(transactions=[txn_f],
private_key=private_key,
public_key=public_key)
txn_g, _ = create_transaction(payload='G'.encode(),
private_key=private_key,
public_key=public_key,
dependencies=[txn_d.header_signature])
transaction_validity[txn_g.header_signature] = True
batch_4 = create_batch(transactions=[txn_g],
private_key=private_key,
public_key=public_key)
txn_h, _ = create_transaction(payload='H'.encode(),
private_key=private_key,
public_key=public_key,
dependencies=[txn_f.header_signature])
transaction_validity[txn_h.header_signature] = True
batch_5 = create_batch(transactions=[txn_h],
private_key=private_key,
public_key=public_key)
for batch in [batch_1, batch_2, batch_3, batch_4, batch_5]:
scheduler.add_batch(batch)
# 2.
scheduler.finalize()
scheduler_iter = iter(scheduler)
while not scheduler.complete(block=False):
txn_info = next(scheduler_iter)
context_id = context_manager.create_context(
state_hash=txn_info.state_hash,
base_contexts=txn_info.base_context_ids,
inputs=[_get_address_from_txn(txn_info)],
outputs=[_get_address_from_txn(txn_info)])
txn_id = txn_info.txn.header_signature
validity = transaction_validity[txn_id]
scheduler.set_transaction_execution_result(txn_signature=txn_id,
is_valid=validity,
context_id=context_id)
# 3.
for i, batch_info in enumerate([(batch_1.header_signature, False),
(batch_2.header_signature, False),
(batch_3.header_signature, True),
(batch_4.header_signature, False),
(batch_5.header_signature, True)]):
batch_id, validity = batch_info
result = scheduler.get_batch_execution_result(batch_id)
self.assertEqual(
result.is_valid, validity,
"Batch {} was {} when it should have been {}".format(
i + 1, 'valid' if result.is_valid else 'invalid',
'valid' if validity else 'invalid'))
def _sequential_add_batch_after_all_results_set(self, scheduler,
context_manager):
"""Tests that adding a new batch only after setting all of the
txn results will produce only expected state roots. Here no state
roots were specified, so similar to block publishing use of scheduler.
Basically:
1) Create 3 batches, the last being marked as having an invalid
transaction. Add one batch and then while the scheduler keeps
on returning transactions, set the txn result, and then
call next_transaction.
2) Call finalize, and then assert that the scheduler is complete
3) Assert that the first batch is valid and has no state hash,
the second batch is valid and since it is the last valid batch
in the scheduler has a state hash, and that the third batch
is invalid and consequently has no state hash.
"""
private_key = signing.generate_privkey()
public_key = signing.generate_pubkey(private_key)
# 1)
batch_signatures = []
batches = []
for names in [['a', 'b'], ['d', 'e'], ['invalid', 'c']]:
batch_txns = []
for name in names:
txn, _ = create_transaction(payload=name.encode(),
private_key=private_key,
public_key=public_key)
batch_txns.append(txn)
batch = create_batch(transactions=batch_txns,
private_key=private_key,
public_key=public_key)
batches.append(batch)
batch_signatures.append(batch.header_signature)
invalid_payload_sha = hashlib.sha512('invalid'.encode()).hexdigest()
for batch in batches:
scheduler.add_batch(batch=batch)
txn_info = scheduler.next_transaction()
while txn_info is not None:
txn_header = transaction_pb2.TransactionHeader()
txn_header.ParseFromString(txn_info.txn.header)
inputs_outputs = list(txn_header.inputs)
c_id = context_manager.create_context(
state_hash=context_manager.get_first_root(),
base_contexts=txn_info.base_context_ids,
inputs=list(txn_header.inputs),
outputs=list(txn_header.outputs))
context_manager.set(context_id=c_id,
address_value_list=[{
inputs_outputs[0]: b'5'
}])
if txn_header.payload_sha512 == invalid_payload_sha:
scheduler.set_transaction_execution_result(
txn_info.txn.header_signature,
is_valid=False,
context_id=None)
else:
scheduler.set_transaction_execution_result(
txn_info.txn.header_signature,
is_valid=True,
context_id=c_id)
txn_info = scheduler.next_transaction()
# 2)
scheduler.finalize()
self.assertTrue(
scheduler.complete(block=False),
"The scheduler has had all txn results set so after "
" calling finalize the scheduler is complete")
# 3)
first_batch_id = batch_signatures.pop(0)
result1 = scheduler.get_batch_execution_result(first_batch_id)
self.assertEqual(result1.is_valid, True, "The first batch is valid")
self.assertIsNone(result1.state_hash, "The first batch doesn't produce"
" a state hash")
second_batch_id = batch_signatures.pop(0)
result2 = scheduler.get_batch_execution_result(second_batch_id)
self.assertEqual(result2.is_valid, True, "The second batch is valid")
self.assertIsNotNone(
result2.state_hash, "The second batch is the "
"last valid batch in the "
"scheduler")
third_batch_id = batch_signatures.pop(0)
result3 = scheduler.get_batch_execution_result(third_batch_id)
self.assertEqual(result3.is_valid, False)
self.assertIsNone(
result3.state_hash, "The last batch is invalid so "
"doesn't have a state hash")
def _add_valid_batch_invalid_batch(self, scheduler, context_manager):
"""Tests the squash function. That the correct state hash is found
at the end of valid and invalid batches, similar to block publishing.
Basically:
1. Adds two batches, one where all the txns are valid,
and one where one of the txns is invalid.
2. Run through the scheduler executor interaction
as txns are processed.
3. Verify that the state root obtained through the squash function
is the same as directly updating the merkle tree.
4. Verify that correct batch statuses are set
This test should work for both a serial and parallel scheduler.
"""
private_key = signing.generate_privkey()
public_key = signing.generate_pubkey(private_key)
# 1)
batch_signatures = []
for names in [['a', 'b'], ['invalid', 'c'], ['d', 'e']]:
batch_txns = []
for name in names:
txn, _ = create_transaction(payload=name.encode(),
private_key=private_key,
public_key=public_key)
batch_txns.append(txn)
batch = create_batch(transactions=batch_txns,
private_key=private_key,
public_key=public_key)
batch_signatures.append(batch.header_signature)
scheduler.add_batch(batch)
scheduler.finalize()
# 2)
sched1 = iter(scheduler)
invalid_payload = hashlib.sha512('invalid'.encode()).hexdigest()
while not scheduler.complete(block=False):
txn_info = next(sched1)
txn_header = transaction_pb2.TransactionHeader()
txn_header.ParseFromString(txn_info.txn.header)
inputs_or_outputs = list(txn_header.inputs)
c_id = context_manager.create_context(
state_hash=txn_info.state_hash,
inputs=inputs_or_outputs,
outputs=inputs_or_outputs,
base_contexts=txn_info.base_context_ids)
if txn_header.payload_sha512 == invalid_payload:
scheduler.set_transaction_execution_result(
txn_info.txn.header_signature, False, None)
else:
context_manager.set(c_id, [{inputs_or_outputs[0]: b"1"}])
scheduler.set_transaction_execution_result(
txn_info.txn.header_signature, True, c_id)
sched2 = iter(scheduler)
# 3)
txn_info_a = next(sched2)
txn_a_header = transaction_pb2.TransactionHeader()
txn_a_header.ParseFromString(txn_info_a.txn.header)
inputs_or_outputs = list(txn_a_header.inputs)
address_a = inputs_or_outputs[0]
txn_info_b = next(sched2)
address_b = _get_address_from_txn(txn_info_b)
txn_infoInvalid = next(sched2)
txn_info_c = next(sched2)
txn_info_d = next(sched2)
address_d = _get_address_from_txn(txn_info_d)
txn_info_e = next(sched2)
address_e = _get_address_from_txn(txn_info_e)
merkle_database = MerkleDatabase(dict_database.DictDatabase())
state_root_end = merkle_database.update(
{
address_a: b"1",
address_b: b"1",
address_d: b"1",
address_e: b"1"
},
virtual=False)
# 4)
batch1_result = scheduler.get_batch_execution_result(
batch_signatures[0])
self.assertTrue(batch1_result.is_valid)
batch2_result = scheduler.get_batch_execution_result(
batch_signatures[1])
self.assertFalse(batch2_result.is_valid)
batch3_result = scheduler.get_batch_execution_result(
batch_signatures[2])
self.assertTrue(batch3_result.is_valid)
self.assertEqual(batch3_result.state_hash, state_root_end)
def _add_batch_after_empty_iteration(self, scheduler):
"""Tests that iterations will continue as result of add_batch().
This test calls next() on a scheduler iterator in a separate thread
called the IteratorThread. The test waits until the IteratorThread
is waiting in next(); internal to the scheduler, it will be waiting on
a condition variable as there are no transactions to return and the
scheduler is not finalized. Then, the test continues by running
add_batch(), which should cause the next() running in the
IterableThread to return a transaction.
This demonstrates the scheduler's ability to wait on an empty iterator
but continue as transactions become available via add_batch.
This test should work for both a serial and parallel scheduler.
"""
private_key = signing.generate_privkey()
public_key = signing.generate_pubkey(private_key)
# Create a basic transaction and batch.
txn, _ = create_transaction(payload='a'.encode(),
private_key=private_key,
public_key=public_key)
batch = create_batch(transactions=[txn],
private_key=private_key,
public_key=public_key)
# This class is used to run the scheduler's iterator.
class IteratorThread(threading.Thread):
def __init__(self, iterable):
threading.Thread.__init__(self)
self._iterable = iterable
self.ready = False
self.condition = threading.Condition()
self.txn_info = None
def run(self):
# Even with this lock here, there is a race condition between
# exit of the lock and entry into the iterable. That is solved
# by sleep later in the test.
with self.condition:
self.ready = True
self.condition.notify()
txn_info = next(self._iterable)
with self.condition:
self.txn_info = txn_info
self.condition.notify()
# This is the iterable we are testing, which we will use in the
# IteratorThread. We also use it in this thread below to test
# for StopIteration.
iterable = iter(scheduler)
# Create and startup thread.
thread = IteratorThread(iterable=iterable)
thread.start()
# Pause here to make sure the thread is absolutely as far along as
# possible; in other words, right before we call next() in it's run()
# method. When this returns, there should be very little time until
# the iterator is blocked on a condition variable.
with thread.condition:
while not thread.ready:
thread.condition.wait()
# May the daemons stay away during this dark time, and may we be
# forgiven upon our return.
time.sleep(1)
# At this point, the IteratorThread should be waiting next(), so we go
# ahead and give it a batch.
scheduler.add_batch(batch)
# If all goes well, thread.txn_info will get set to the result of the
# next() call. If not, it will timeout and thread.txn_info will be
# empty.
with thread.condition:
if thread.txn_info is None:
thread.condition.wait(5)
# If thread.txn_info is empty, the test failed as iteration did not
# continue after add_batch().
self.assertIsNotNone(thread.txn_info, "iterable failed to return txn")
self.assertEqual(txn.payload, thread.txn_info.txn.payload)
# Continue with normal shutdown/cleanup.
scheduler.finalize()
scheduler.set_transaction_execution_result(txn.header_signature, False,
None)
with self.assertRaises(StopIteration):
next(iterable)
def _fail_fast(self, scheduler):
"""Tests that transactions that are already determined to be in an
invalid batch due to a prior transaction being invalid, won't run.
x
[ A B C ] [ D E F]
B
Notes:
1. Create an invalid transaction, txn A, and put it in a batch
with txn B. Create a transaction, txn C, that depends on txn B
and put it in a batch with txn D.
2. Add the batches to the scheduler and call finalize.
3. Assert that only txn A is run.
"""
private_key = signing.generate_privkey()
public_key = signing.generate_pubkey(private_key)
transaction_validity = {}
txn_a, _ = create_transaction(
payload='A'.encode(),
private_key=private_key,
public_key=public_key)
transaction_validity[txn_a.header_signature] = False
txn_b, _ = create_transaction(
payload='B'.encode(),
private_key=private_key,
public_key=public_key)
txn_c, _ = create_transaction(
payload='C'.encode(),
private_key=private_key,
public_key=public_key)
batch_1 = create_batch(transactions=[txn_a, txn_b, txn_c],
private_key=private_key,
public_key=public_key)
txn_d, _ = create_transaction(
payload='D'.encode(),
private_key=private_key,
public_key=public_key,
dependencies=[txn_b.header_signature])
txn_e, _ = create_transaction(
payload='E'.encode(),
private_key=private_key,
public_key=public_key)
txn_f, _ = create_transaction(
payload='F'.encode(),
private_key=private_key,
public_key=public_key)
batch_2 = create_batch(
transactions=[txn_d, txn_e, txn_f],
private_key=private_key,
public_key=public_key)
scheduler.add_batch(batch_1)
scheduler.add_batch(batch_2)
scheduler.finalize()
scheduler_iter = iter(scheduler)
while not scheduler.complete(block=False):
try:
txn_from_scheduler = next(scheduler_iter)
except StopIteration:
break
txn_id = txn_from_scheduler.txn.header_signature
self.assertEqual(txn_id,
txn_a.header_signature,
"Only Transaction A is run, not txn {}"
"".format(txn_from_scheduler.txn.payload))
validity = transaction_validity[txn_id]
scheduler.set_transaction_execution_result(
txn_signature=txn_id,
is_valid=validity,
context_id=None)
scheduler_iter2 = iter(scheduler)
txn_info_from_2 = next(scheduler_iter2)
txn_id_from_2 = txn_info_from_2.txn.header_signature
self.assertEqual(txn_id_from_2, txn_a.header_signature,
"Only Transaction A is run, not "
"txn {}".format(txn_info_from_2.txn.payload))
with self.assertRaises(StopIteration):
next(scheduler_iter2)
