def end_block(self, request_end_block):
"""Calculate block hash using transaction ids and previous block
hash to be stored in the next block.
Args:
height (int): new height of the chain.
"""
height = request_end_block.height
self.new_height = height
block_txn_hash = calculate_hash(self.block_txn_ids)
block = self.bigchaindb.get_latest_block()
if self.block_txn_ids:
self.block_txn_hash = calculate_hash(
[block['app_hash'], block_txn_hash])
else:
self.block_txn_hash = block['app_hash']
# TODO: calculate if an election has concluded
# NOTE: ensure the local validator set is updated
# validator_updates = self.bigchaindb.get_validator_update()
# validator_updates = [encode_validator(v) for v in validator_updates]
validator_updates = []
# Store pre-commit state to recover in case there is a crash
# during `commit`
pre_commit_state = PreCommitState(commit_id=PRE_COMMIT_ID,
height=self.new_height,
transactions=self.block_txn_ids)
logger.debug('Updating PreCommitState: %s', self.new_height)
self.bigchaindb.store_pre_commit_state(pre_commit_state._asdict())
return ResponseEndBlock(validator_updates=validator_updates)
def end_block(self, request_end_block):
"""Calculate block hash using transaction ids and previous block
hash to be stored in the next block.
Args:
height (int): new height of the chain.
"""
self.abort_if_abci_chain_is_not_synced()
chain_shift = 0 if self.chain is None else self.chain['height']
height = request_end_block.height + chain_shift
self.new_height = height
block_txn_hash = calculate_hash(self.block_txn_ids)
block = self.bigchaindb.get_latest_block()
if self.block_txn_ids:
self.block_txn_hash = calculate_hash(
[block['app_hash'], block_txn_hash])
else:
self.block_txn_hash = block['app_hash']
validator_update = Election.process_block(self.bigchaindb,
self.new_height,
self.block_transactions)
# Store pre-commit state to recover in case there is a crash during `commit`
pre_commit_state = PreCommitState(commit_id=PRE_COMMIT_ID,
height=self.new_height,
transactions=self.block_txn_ids)
logger.debug('Updating PreCommitState: %s', self.new_height)
self.bigchaindb.store_pre_commit_state(pre_commit_state._asdict())
return ResponseEndBlock(validator_updates=validator_update)
def end_block(self, request_end_block):
"""Calculate block hash using transaction ids and previous block
hash to be stored in the next block.
Args:
height (int): new height of the chain.
"""
self.abort_if_abci_chain_is_not_synced()
chain_shift = 0 if self.chain is None else self.chain['height']
height = request_end_block.height + chain_shift
self.new_height = height
# store pre-commit state to recover in case there is a crash during
# `end_block` or `commit`
logger.debug(f'Updating pre-commit state: {self.new_height}')
pre_commit_state = dict(height=self.new_height,
transactions=self.block_txn_ids)
self.bigchaindb.store_pre_commit_state(pre_commit_state)
block_txn_hash = calculate_hash(self.block_txn_ids)
block = self.bigchaindb.get_latest_block()
if self.block_txn_ids:
self.block_txn_hash = calculate_hash([block['app_hash'], block_txn_hash])
else:
self.block_txn_hash = block['app_hash']
validator_update = Election.process_block(self.bigchaindb,
self.new_height,
self.block_transactions)
return ResponseEndBlock(validator_updates=validator_update)
def end_block(self, request_end_block):
"""Calculate block hash using transaction ids and previous block
hash to be stored in the next block.
Args:
height (int): new height of the chain.
"""
height = request_end_block.height
self.new_height = height
block_txn_hash = calculate_hash(self.block_txn_ids)
block = self.bigchaindb.get_latest_block()
if self.block_txn_ids:
self.block_txn_hash = calculate_hash([block['app_hash'], block_txn_hash])
else:
self.block_txn_hash = block['app_hash']
# Check if the current block concluded any validator elections and
# update the locally tracked validator set
validator_updates = ValidatorElection.get_validator_update(self.bigchaindb,
self.new_height,
self.block_transactions)
# Store pre-commit state to recover in case there is a crash
# during `commit`
pre_commit_state = PreCommitState(commit_id=PRE_COMMIT_ID,
height=self.new_height,
transactions=self.block_txn_ids)
logger.debug('Updating PreCommitState: %s', self.new_height)
self.bigchaindb.store_pre_commit_state(pre_commit_state._asdict())
return ResponseEndBlock(validator_updates=validator_updates)
def end_block(self, request_end_block):
"""Calculate block hash using transaction ids and previous block
hash to be stored in the next block.
Args:
height (int): new height of the chain.
"""
self.abort_if_abci_chain_is_not_synced()
chain_shift = 0 if self.chain is None else self.chain['height']
height = request_end_block.height + chain_shift
self.new_height = height
block_txn_hash = calculate_hash(self.block_txn_ids)
block = self.bigchaindb.get_latest_block()
if self.block_txn_ids:
self.block_txn_hash = calculate_hash([block['app_hash'], block_txn_hash])
else:
self.block_txn_hash = block['app_hash']
# Check if the current block concluded any validator elections and
# update the locally tracked validator set
validator_update = ValidatorElection.approved_update(self.bigchaindb,
self.new_height,
self.block_transactions)
update = [validator_update] if validator_update else []
# Store pre-commit state to recover in case there is a crash
# during `commit`
pre_commit_state = PreCommitState(commit_id=PRE_COMMIT_ID,
height=self.new_height,
transactions=self.block_txn_ids)
logger.debug('Updating PreCommitState: %s', self.new_height)
self.bigchaindb.store_pre_commit_state(pre_commit_state._asdict())
return ResponseEndBlock(validator_updates=update)
def test_app(tb, init_chain_request):
from bigchaindb import App
from bigchaindb.tendermint_utils import calculate_hash
from bigchaindb.common.crypto import generate_key_pair
from bigchaindb.models import Transaction
b = tb
app = App(b)
p = ProtocolHandler(app)
data = p.process('info',
types.Request(info=types.RequestInfo(version='2')))
res = next(read_messages(BytesIO(data), types.Response))
assert res
assert res.info.last_block_app_hash == b''
assert res.info.last_block_height == 0
assert not b.get_latest_block()
p.process('init_chain', types.Request(init_chain=init_chain_request))
block0 = b.get_latest_block()
assert block0
assert block0['height'] == 0
assert block0['app_hash'] == ''
pk = codecs.encode(init_chain_request.validators[0].pub_key.data,
'base64').decode().strip('\n')
[validator] = b.get_validators(height=1)
assert validator['pub_key']['data'] == pk
assert validator['voting_power'] == 10
alice = generate_key_pair()
bob = generate_key_pair()
tx = Transaction.create([alice.public_key],
[([bob.public_key], 1)])\
.sign([alice.private_key])
etxn = json.dumps(tx.to_dict()).encode('utf8')
r = types.Request(check_tx=types.RequestCheckTx(tx=etxn))
data = p.process('check_tx', r)
res = next(read_messages(BytesIO(data), types.Response))
assert res
assert res.check_tx.code == 0
r = types.Request()
r.begin_block.hash = b''
p.process('begin_block', r)
r = types.Request(deliver_tx=types.RequestDeliverTx(tx=etxn))
data = p.process('deliver_tx', r)
res = next(read_messages(BytesIO(data), types.Response))
assert res
assert res.deliver_tx.code == 0
new_block_txn_hash = calculate_hash([tx.id])
r = types.Request(end_block=types.RequestEndBlock(height=1))
data = p.process('end_block', r)
res = next(read_messages(BytesIO(data), types.Response))
assert res
assert 'end_block' == res.WhichOneof('value')
new_block_hash = calculate_hash([block0['app_hash'], new_block_txn_hash])
data = p.process('commit', None)
res = next(read_messages(BytesIO(data), types.Response))
assert res.commit.data == new_block_hash.encode('utf-8')
assert b.get_transaction(tx.id).id == tx.id
block0 = b.get_latest_block()
assert block0
assert block0['height'] == 1
assert block0['app_hash'] == new_block_hash
# empty block should not update height
r = types.Request()
r.begin_block.hash = new_block_hash.encode('utf-8')
p.process('begin_block', r)
r = types.Request()
r.end_block.height = 2
p.process('end_block', r)
data = p.process('commit', None)
res = next(read_messages(BytesIO(data), types.Response))
assert res.commit.data == new_block_hash.encode('utf-8')
block0 = b.get_latest_block()
assert block0
assert block0['height'] == 1
# when empty block is generated hash of previous block should be returned
assert block0['app_hash'] == new_block_hash
def test_calculate_hash_no_key(b):
from bigchaindb.tendermint_utils import calculate_hash
# pass an empty list
assert calculate_hash([]) == ''
def test_app(b, init_chain_request):
from bigchaindb import App
from bigchaindb.tendermint_utils import calculate_hash
from bigchaindb.common.crypto import generate_key_pair
from bigchaindb.models import Transaction
app = App(b)
p = ProtocolHandler(app)
data = p.process('info',
types.Request(info=types.RequestInfo(version=__tm_supported_versions__[0])))
res = next(read_messages(BytesIO(data), types.Response))
assert res
assert res.info.last_block_app_hash == b''
assert res.info.last_block_height == 0
assert not b.get_latest_block()
p.process('init_chain', types.Request(init_chain=init_chain_request))
block0 = b.get_latest_block()
assert block0
assert block0['height'] == 0
assert block0['app_hash'] == ''
pk = codecs.encode(init_chain_request.validators[0].pub_key.data, 'base64').decode().strip('\n')
[validator] = b.get_validators(height=1)
assert validator['public_key']['value'] == pk
assert validator['voting_power'] == 10
alice = generate_key_pair()
bob = generate_key_pair()
tx = Transaction.create([alice.public_key],
[([bob.public_key], 1)])\
.sign([alice.private_key])
etxn = json.dumps(tx.to_dict()).encode('utf8')
r = types.Request(check_tx=types.RequestCheckTx(tx=etxn))
data = p.process('check_tx', r)
res = next(read_messages(BytesIO(data), types.Response))
assert res
assert res.check_tx.code == 0
r = types.Request()
r.begin_block.hash = b''
p.process('begin_block', r)
r = types.Request(deliver_tx=types.RequestDeliverTx(tx=etxn))
data = p.process('deliver_tx', r)
res = next(read_messages(BytesIO(data), types.Response))
assert res
assert res.deliver_tx.code == 0
new_block_txn_hash = calculate_hash([tx.id])
r = types.Request(end_block=types.RequestEndBlock(height=1))
data = p.process('end_block', r)
res = next(read_messages(BytesIO(data), types.Response))
assert res
assert 'end_block' == res.WhichOneof('value')
new_block_hash = calculate_hash([block0['app_hash'], new_block_txn_hash])
data = p.process('commit', None)
res = next(read_messages(BytesIO(data), types.Response))
assert res.commit.data == new_block_hash.encode('utf-8')
assert b.get_transaction(tx.id).id == tx.id
block0 = b.get_latest_block()
assert block0
assert block0['height'] == 1
assert block0['app_hash'] == new_block_hash
# empty block should not update height
r = types.Request()
r.begin_block.hash = new_block_hash.encode('utf-8')
p.process('begin_block', r)
r = types.Request()
r.end_block.height = 2
p.process('end_block', r)
data = p.process('commit', None)
res = next(read_messages(BytesIO(data), types.Response))
assert res.commit.data == new_block_hash.encode('utf-8')
block0 = b.get_latest_block()
assert block0
assert block0['height'] == 2
# when empty block is generated hash of previous block should be returned
assert block0['app_hash'] == new_block_hash
def test_calculate_hash_no_key(b):
from bigchaindb.tendermint_utils import calculate_hash
# pass an empty list
assert calculate_hash([]) == ''
