def __init__(self, state):
self.state = state
self.version_number = config.dev.version_number
self.transaction_pool = []
self.txhash_timestamp = []
self.m_blockchain = []
self.wallet = Wallet()
# FIXME: should self.mining_address be self.staking_address
self.mining_address = self.wallet.address_bundle[0].xmss.get_address()
self.initialize()
self.ping_list = []
self.ip_list = []
self.blockheight_map = []
self.stake_list = []
self.stake_commit = []
self.block_chain_buffer = None # Initialized by node.py
self.prev_txpool = [None] * 1000 # TODO: use python dequeue
self.pending_tx_pool = []
self.pending_tx_pool_hash = []
self.duplicate_tx_pool = OrderedDict()
self.stake_reveal_one = []
self.stake_ban_list = []
self.stake_ban_block = {}
self.stake_validator_latency = defaultdict(dict)
self.chain_dat_filename = os.path.join(config.user.data_path,
config.dev.mnemonic_filename)
def test_getnewaddress2(self):
wallet = Wallet(None)
address = wallet.get_new_address(seed=TestWallet.S1)
self.assertEqual(
address[0],
'Q04402be77fb7df9c755883b066f1f33254a19d244c4dbae41b94f88a32b88a5921c7'
)
def test_getnewaddress(self):
with self.setWalletDir("test_wallet"):
wallet = Wallet()
S1 = hstr2bin(
'7bf1e7c1c84be2c820211572d990c0430e09401053ce2af489ee3e4d030c027464d9cac1fff449a2405b7f3fc63018a4'
)
address = wallet.get_new_address(seed=S1)
self.assertIsNotNone(address.address)
self.assertEqual(
'Q56e5d6410a5716e548d89ca27b8f057122af9560ba3cd8aa99879f32758330267811af83',
address.address)
def test_getnewaddress(self):
state = State()
self.assertIsNotNone(state)
wallet = Wallet(None)
address = wallet.get_new_address()
chain = Chain(state)
self.assertIsNotNone(state)
wallet = Wallet(chain)
self.assertIsNotNone(state)
def test_create_wallet(self):
with self.setWalletDir("no_wallet"):
wallet = Wallet()
self.assertIsNotNone(wallet)
wallet_file_path = os.path.join(config.user.wallet_path,
"wallet.qrl")
self.assertTrue(isfile(wallet_file_path))
def test_create_wallet(self):
state = State()
self.assertIsNotNone(state)
chain = Chain(state)
self.assertIsNotNone(state)
wallet = Wallet(chain)
self.assertIsNotNone(state)
def test_upgrade_wallet(self):
with self.setWalletDir("old_wallet"):
wallet_file_path = os.path.join(config.user.wallet_path,
"wallet.qrl")
self.assertFalse(
isfile(wallet_file_path)) # New wallet is NOT there
wallet = Wallet()
self.assertIsNotNone(wallet)
self.assertTrue(
isfile(wallet_file_path)) # Now the new wallet appears
class Chain:
def __init__(self, state):
self.state = state
self.version_number = config.dev.version_number
self.transaction_pool = []
self.txhash_timestamp = []
self.m_blockchain = []
self.wallet = Wallet()
# FIXME: should self.mining_address be self.staking_address
self.mining_address = self.wallet.address_bundle[0].xmss.get_address()
self.initialize()
self.ping_list = []
self.ip_list = []
self.blockheight_map = []
self.stake_list = []
self.stake_commit = []
self.block_chain_buffer = None # Initialized by node.py
self.prev_txpool = [None] * 1000 # TODO: use python dequeue
self.pending_tx_pool = []
self.pending_tx_pool_hash = []
self.duplicate_tx_pool = OrderedDict()
self.stake_reveal_one = []
self.stake_ban_list = []
self.stake_ban_block = {}
self.stake_validator_latency = defaultdict(dict)
self.chain_dat_filename = os.path.join(config.user.data_path,
config.dev.mnemonic_filename)
def add_tx_to_duplicate_pool(self, duplicate_txn):
if len(self.duplicate_tx_pool) >= config.dev.transaction_pool_size:
self.duplicate_tx_pool.popitem(last=False)
self.duplicate_tx_pool[
duplicate_txn.get_message_hash()] = duplicate_txn
def initialize(self):
logger.info('QRL blockchain ledger %s', self.version_number)
logger.info('loading db')
logger.info('loading wallet')
logger.info('mining/staking address %s', self.mining_address)
def validate_reboot(self, mhash, nonce):
reboot_data = [
'2920c8ec34f04f59b7df4284a4b41ca8cbec82ccdde331dd2d64cc89156af653',
0
]
try:
reboot_data_db = self.state.db.get('reboot_data')
reboot_data = reboot_data_db
except:
pass
if reboot_data[1] >= nonce: # already used
msg = 'nonce in db ' + str(reboot_data[1])
msg += '\nnonce provided ' + str(nonce)
return None, msg
reboot_data[1] = nonce
output = mhash
for i in range(0, reboot_data[1]):
output = sha256(output)
if output != reboot_data[0]:
msg = 'expected hash ' + str(reboot_data[0])
msg += '\nhash found ' + str(output)
msg += '\nnonce provided ' + str(nonce) + "\n"
return None, msg
# reboot_data[1] += 1
# self.state.db.put('reboot_data', reboot_data)
return True, 'Success'
def generate_reboot_hash(self, key, nonce=None, blocknumber=0):
reboot_data = [
'2920c8ec34f04f59b7df4284a4b41ca8cbec82ccdde331dd2d64cc89156af653',
0
]
try:
reboot_data = self.state.db.get('reboot_data')
except:
pass
if nonce:
if reboot_data[1] > nonce:
return None, 'Nonce must be greater than or equals to ' + str(
reboot_data[1]) + '\r\n'
reboot_data[1] = int(nonce)
output = sha256(key)
for i in range(0, 40000 - reboot_data[1]):
output = sha256(output)
status, error = self.validate_reboot(output, reboot_data[1])
if not status:
return None, error
return json.dumps({
'hash': output,
'nonce': reboot_data[1],
'blocknumber': int(blocknumber)
}), "Reboot Initiated\r\n"
def get_sv(self, terminator):
for s in self.state.stake_list_get():
if terminator in s[1]:
return s[0]
return None
def reveal_to_terminator(self, reveal, blocknumber, add_loop=0):
tmp = sha256(reveal)
epoch = blocknumber // config.dev.blocks_per_epoch
for _ in range(blocknumber - (epoch * config.dev.blocks_per_epoch) +
add_loop):
tmp = sha256(tmp)
return tmp
def select_hashchain(self,
last_block_headerhash,
stake_address=None,
hashchain=None,
blocknumber=None):
if not hashchain:
for s in self.block_chain_buffer.stake_list_get(blocknumber):
if s[0] == stake_address:
hashchain = s[1]
break
if not hashchain:
return
target_chain = 0
for byte in last_block_headerhash:
target_chain += byte
target_chain = (target_chain - 1) % (config.dev.hashchain_nums - 1
) # 1 Primary hashchain size
return hashchain[-1], hashchain[target_chain]
def select_winners(self,
reveals,
topN=1,
blocknumber=None,
block=None,
seed=None):
winners = None
if not seed:
logger.info('Exception raised due to Seed is None')
raise Exception
if blocknumber:
winners = heapq.nsmallest(
topN,
reveals,
key=lambda reveal: self.score(
stake_address=self.get_sv(
self.reveal_to_terminator(
reveal, blocknumber, add_loop=1)),
reveal_one=reveal,
balance=self.block_chain_buffer.get_st_balance(
self.get_sv(
self.reveal_to_terminator(
reveal, blocknumber, add_loop=1)), blocknumber
),
seed=seed)
) # blocknumber+1 as we have one extra hash for the reveal
return winners
winners = heapq.nsmallest(
topN, reveals, key=lambda reveal: reveal[4]) # reveal[4] is score
winners_dict = {}
for winner in winners:
winners_dict[winner[3]] = winner # winner[3] is reveal_one
return winners_dict
@staticmethod
def score(stake_address, reveal_one, balance=0, seed=None, verbose=False):
if not seed:
logger.info('Exception Raised due to seed none in score fn')
raise Exception
if not balance:
logger.info(' balance 0 so score none ')
logger.info(' stake_address %s', stake_address)
return None
reveal_one_number = int(bin2hstr(reveal_one), 16)
score = (Decimal(config.dev.N) -
(Decimal(reveal_one_number | seed).log10() /
Decimal(2).log10())) / Decimal(balance)
if verbose:
logger.info('=' * 10)
logger.info('Score - %s', score)
logger.info('reveal_one - %s', reveal_one_number)
logger.info('seed - %s', seed)
logger.info('balance - %s', balance)
return score
def update_pending_tx_pool(self, tx, peer):
if len(self.pending_tx_pool) >= config.dev.transaction_pool_size:
del self.pending_tx_pool[0]
del self.pending_tx_pool_hash[0]
self.pending_tx_pool.append([tx, peer])
self.pending_tx_pool_hash.append(tx.txhash)
def get_stake_validators_hash(self):
sv_hash = StringIO()
stake_validators_list = self.state.stake_validators_list
for staker in stake_validators_list.sv_list:
balance = self.state.state_balance(staker)
sv_hash.write(staker + str(balance))
sv_hash = sha256(sv_hash.getvalue())
return sv_hash
# create a block from a list of supplied tx_hashes, check state to ensure validity..
def create_stake_block(self, reveal_hash, vote_hash, last_block_number):
t_pool2 = copy.deepcopy(self.transaction_pool)
del self.transaction_pool[:]
curr_epoch = (last_block_number + 1) // config.dev.blocks_per_epoch
# recreate the transaction pool as in the tx_hash_list, ordered by txhash..
tx_nonce = defaultdict(int)
total_txn = len(t_pool2)
txnum = 0
while txnum < total_txn:
tx = t_pool2[txnum]
if self.block_chain_buffer.pubhashExists(tx.txfrom, tx.pubhash,
last_block_number + 1):
del t_pool2[txnum]
total_txn -= 1
continue
if tx.subtype == TX_SUBTYPE_STAKE:
epoch_blocknum = last_block_number + 1 - (
curr_epoch * config.dev.blocks_per_epoch)
# skip 1st st txn without tx.first_hash in case its beyond allowed epoch blocknumber
if (not tx.first_hash
) and epoch_blocknum >= config.dev.stake_before_x_blocks:
logger.warning(
'Skipping st as blocknumber beyond stake limit , CreateBlock()'
)
logger.warning(
'Expected ST txn before epoch_blocknumber : %s',
config.dev.stake_before_x_blocks)
logger.warning('Found ST txn in epoch_blocknumber : %s',
epoch_blocknum)
del t_pool2[txnum]
total_txn -= 1
continue
if tx.epoch != curr_epoch:
logger.warning(
'Skipping st as epoch mismatch, CreateBlock()')
logger.warning('Expected st epoch : %s', curr_epoch)
logger.warning('Found st epoch : %s', tx.epoch)
del t_pool2[txnum]
total_txn -= 1
continue
balance = 0
next_sv_list = self.block_chain_buffer.next_stake_list_get(
last_block_number + 1)
if tx.txfrom in next_sv_list:
balance = next_sv_list[tx.txfrom].balance
threshold_blocknum = self.block_chain_buffer.get_threshold(
last_block_number + 1, tx.txfrom)
if epoch_blocknum < threshold_blocknum - 1:
logger.warning(
'Skipping st as ST txn before threshold')
logger.warning('Expected : %s', threshold_blocknum - 1)
logger.warning('Found : %s', epoch_blocknum)
del t_pool2[txnum]
total_txn -= 1
continue
# balance>0 only in case 1st st already accepted
if not (balance > 0 or last_block_number == 0):
if tx.first_hash:
del t_pool2[txnum]
total_txn -= 1
continue
self.add_tx_to_pool(tx)
tx_nonce[tx.txfrom] += 1
tx.nonce = self.block_chain_buffer.get_stxn_state(
last_block_number + 1, tx.txfrom)[0] + tx_nonce[tx.txfrom]
txnum += 1
# create the block..
block_obj = self.m_create_block(reveal_hash, vote_hash,
last_block_number)
# reset the pool back
self.transaction_pool = copy.deepcopy(t_pool2)
return block_obj
# return a sorted list of txhashes from transaction_pool, sorted by timestamp from block n
# (actually from start of transaction_pool) to time, then ordered by txhash.
def sorted_tx_pool(self, timestamp=None):
if timestamp is None:
timestamp = time()
pool = copy.deepcopy(self.transaction_pool)
trimmed_pool = []
end_time = timestamp
for tx in pool:
if self.txhash_timestamp[self.txhash_timestamp.index(tx.txhash) +
1] <= end_time:
trimmed_pool.append(tx.txhash)
trimmed_pool.sort()
if not trimmed_pool:
return False
return trimmed_pool
def is_stake_banned(self, stake_address):
if stake_address in self.stake_ban_list:
epoch_diff = (self.height() / config.dev.blocks_per_epoch) - (
self.stake_ban_block[stake_address] /
config.dev.blocks_per_epoch)
if self.height(
) - self.stake_ban_block[stake_address] > 10 or epoch_diff > 0:
logger.info('Stake removed from ban list')
del self.stake_ban_block[stake_address]
self.stake_ban_list.remove(stake_address)
return False
return True
return False
def pos_block_pool(self, n=1.5):
"""
create a snapshot of the transaction pool to account for network traversal time (probably less than 300ms, but let's give a window of 1.5 seconds).
:param n:
:return: list of merkle root hashes of the tx pool over last 1.5 seconds
"""
timestamp = time()
start_time = timestamp - n
x = self.sorted_tx_pool(start_time)
y = self.sorted_tx_pool(timestamp)
if not y: # if pool is empty -> return sha256 null
return [sha256('')], [[]]
elif x == y: # if the pool isnt empty but there is no difference then return the only merkle hash possible..
return [merkle_tx_hash(y)], [y]
else: # there is a difference in contents of pool over last 1.5 seconds..
merkle_hashes = []
txhashes = []
if not x:
merkle_hashes.append(sha256(''))
x = []
txhashes.append(x)
else:
merkle_hashes.append(merkle_tx_hash(x))
txhashes.append(x)
tmp_txhashes = x
for tx in reversed(self.transaction_pool):
if tx.txhash in y and tx.txhash not in x:
tmp_txhashes.append(tx.txhash)
tmp_txhashes.sort()
merkle_hashes.append(merkle_tx_hash(tmp_txhashes))
txhashes.append(tmp_txhashes)
return merkle_hashes, txhashes
@staticmethod
def pos_block_selector(seed, n):
"""
create the PRF selector sequence based upon a seed and number
of stakers in list (temporary..there are better ways to do this
with bigger seed value, but it works)
:param seed:
:param n:
:return:
"""
prf = getHashChainSeed(seed, 1, 20000)
# FIXME: Check with cyyber the purpose of this
prf_range = []
n_bits = int(ceil(log(n, 2)))
for z in prf:
x = ord(z) >> 8 - n_bits
if x < n:
prf_range.append(x)
return prf_range
def pos_block_selector_n(self, seed, n, i):
"""
return the POS staker list position for given seed at index, i
:param seed:
:param n:
:param i:
:return:
"""
l = self.pos_block_selector(seed, n)
return l[i]
#### move from here
# tx, address chain search functions
def search_telnet(self, txcontains, islong=1):
tx_list = []
hrs_list = []
# because we allow hrs substitution in txto for transactions, we need to identify where this occurs for searching..
if txcontains[0] == 'Q':
for block in self.m_blockchain:
for tx in block.transactions:
if tx.txfrom == txcontains:
if len(tx.hrs) > 0:
if self.state.state_hrs(tx.hrs) == txcontains:
hrs_list.append(tx.hrs)
for tx in self.transaction_pool:
if tx.txhash == txcontains or tx.txfrom == txcontains or tx.txto == txcontains or tx.txto in hrs_list:
if islong == 0:
tx_list.append('<tx:txhash> ' + tx.txhash +
' <transaction_pool>')
if islong == 1: tx_list.append(json_print_telnet(tx))
for block in self.m_blockchain:
for tx in block.transactions:
if tx.txhash == txcontains or tx.txfrom == txcontains or tx.txto == txcontains or tx.txto in hrs_list:
# logger.info(( txcontains, 'found in block',str(block.blockheader.blocknumber),'..'
if islong == 0:
tx_list.append('<tx:txhash> ' + tx.txhash +
' <block> ' +
str(block.blockheader.blocknumber))
if islong == 1: tx_list.append(json_print_telnet(tx))
return tx_list
def search(self, txcontains, islong=1):
for tx in self.transaction_pool:
if tx.txhash == txcontains or tx.txfrom == txcontains or tx.txto == txcontains:
logger.info('%s found in transaction pool..', txcontains)
if islong == 1: json_print(tx)
for block in self.m_blockchain:
for tx in block.transactions:
if tx.txhash == txcontains or tx.txfrom == txcontains or tx.txto == txcontains:
logger.info('%s found in block %s', txcontains,
str(block.blockheader.blocknumber))
if islong == 0: logger.info(('<tx:txhash> ' + tx.txhash))
if islong == 1: json_print(tx)
return
@staticmethod
def get_chaindatafile(epoch):
baseDir = os.path.join(config.user.data_path,
config.dev.chain_file_directory)
config.create_path(baseDir)
return os.path.join(baseDir, 'chain.da' + str(epoch))
def f_read_chain(self, epoch):
delimiter = config.dev.binary_file_delimiter
block_list = []
if os.path.isfile(self.get_chaindatafile(epoch)) is False:
if epoch != 0:
return []
logger.info('Creating new chain file')
genesis_block = GenesisBlock().set_chain(self)
block_list.append(genesis_block)
return block_list
try:
with open(self.get_chaindatafile(epoch), 'rb') as myfile:
jsonBlock = bytearray()
tmp = bytearray()
count = 0
offset = 0
while True:
chars = myfile.read(config.dev.chain_read_buffer_size)
for char in chars:
offset += 1
if count > 0 and char != delimiter[count]:
count = 0
jsonBlock += tmp
tmp = bytearray()
if char == delimiter[count]:
tmp.append(delimiter[count])
count += 1
if count < len(delimiter):
continue
tmp = bytearray()
count = 0
pos = offset - len(delimiter) - len(jsonBlock)
jsonBlock = bz2.decompress(jsonBlock)
block = Block.from_json(jsonBlock)
self.update_block_metadata(
block.blockheader.blocknumber, pos,
len(jsonBlock))
block_list.append(block)
jsonBlock = bytearray()
continue
jsonBlock.append(char)
if len(chars) < config.dev.chain_read_buffer_size:
break
except Exception as e:
logger.error('IO error %s', e)
return []
gc.collect()
return block_list
def update_block_metadata(self, blocknumber, blockPos, blockSize):
self.state.db.db.Put(
bytes('block_' + str(blocknumber), 'utf-8'),
bytes(str(blockPos) + ',' + str(blockSize), 'utf-8'))
def update_last_tx(self, block):
if len(block.transactions) == 0:
return
last_txn = []
try:
last_txn = self.state.db.get('last_txn')
except:
pass
for txn in block.transactions[-20:]:
if txn.subtype == TX_SUBTYPE_TX:
last_txn.insert(0, [
txn.transaction_to_json(), block.blockheader.blocknumber,
block.blockheader.timestamp
])
del last_txn[20:]
self.state.db.put('last_txn', last_txn)
def update_wallet_tx_metadata(self, addr, new_txhash):
try:
txhash = self.state.db.get('txn_' + addr)
except Exception:
txhash = []
txhash.append(bin2hstr(new_txhash))
self.state.db.put('txn_' + addr, txhash)
def update_txn_count(self, txto, txfrom):
last_count = self.state.state_get_txn_count(txto)
self.state.db.put('txn_count_' + txto, last_count + 1)
last_count = self.state.state_get_txn_count(txfrom)
self.state.db.put('txn_count_' + txfrom, last_count + 1)
def update_tx_metadata(self, block):
if len(block.transactions) == 0:
return
for txn in block.transactions:
if txn.subtype in (TX_SUBTYPE_TX, TX_SUBTYPE_COINBASE):
self.state.db.put(bin2hstr(txn.txhash), [
txn.transaction_to_json(), block.blockheader.blocknumber,
block.blockheader.timestamp
])
if txn.subtype == TX_SUBTYPE_TX:
self.update_wallet_tx_metadata(txn.txfrom, txn.txhash)
self.update_wallet_tx_metadata(txn.txto, txn.txhash)
self.update_txn_count(txn.txto, txn.txfrom)
def f_write_m_blockchain(self):
blocknumber = self.m_blockchain[-1].blockheader.blocknumber
suffix = int(blocknumber // config.dev.blocks_per_chain_file)
writeable = self.m_blockchain[-config.dev.disk_writes_after_x_blocks:]
logger.info('Appending data to chain')
with open(self.get_chaindatafile(suffix), 'ab') as myfile:
for block in writeable:
jsonBlock = bytes(json_bytestream(block), 'utf-8')
compressedBlock = bz2.compress(jsonBlock,
config.dev.compression_level)
pos = myfile.tell()
blockSize = len(compressedBlock)
self.update_block_metadata(block.blockheader.blocknumber, pos,
blockSize)
myfile.write(compressedBlock)
myfile.write(config.dev.binary_file_delimiter)
del self.m_blockchain[:-1]
gc.collect()
return
def load_chain_by_epoch(self, epoch):
chains = self.f_read_chain(epoch)
self.m_blockchain.append(chains[0])
self.state.state_read_genesis(self.m_get_block(0))
self.block_chain_buffer = ChainBuffer(self)
for block in chains[1:]:
self.add_block_mainchain(block, validate=False)
return self.m_blockchain
def add_block_mainchain(self, block, validate=True):
return self.block_chain_buffer.add_block_mainchain(chain=self,
block=block,
validate=validate)
def m_load_chain(self):
del self.m_blockchain[:]
self.state.db.zero_all_addresses()
chains = self.f_read_chain(0)
self.m_blockchain.append(chains[0])
self.state.state_read_genesis(self.m_get_block(0))
self.block_chain_buffer = ChainBuffer(self)
for block in chains[1:]:
self.add_block_mainchain(block, validate=False)
if len(self.m_blockchain) < config.dev.blocks_per_chain_file:
return self.m_blockchain
epoch = 1
while os.path.isfile(self.get_chaindatafile(epoch)):
del self.m_blockchain[:-1]
chains = self.f_read_chain(epoch)
for block in chains:
self.add_block_mainchain(block, validate=False)
epoch += 1
self.wallet.save_wallet()
gc.collect()
return self.m_blockchain
def m_read_chain(self):
if not self.m_blockchain:
self.m_load_chain()
return self.m_blockchain
def load_from_file(self, blocknum):
epoch = int(blocknum // config.dev.blocks_per_chain_file)
with open(self.get_chaindatafile(epoch), 'rb') as f:
pos_size = self.state.db.db.Get(
bytes('block_' + str(blocknum), 'utf-8'))
pos, size = pos_size.decode('utf-8').split(',')
pos = int(pos)
size = int(size)
f.seek(pos)
jsonBlock = bz2.decompress(f.read(size))
block = Block.from_json(jsonBlock)
return block
def m_get_block(self, n):
if len(self.m_blockchain) == 0:
return []
beginning_blocknum = self.m_blockchain[0].blockheader.blocknumber
diff = n - beginning_blocknum
if diff < 0:
return self.load_from_file(n)
if diff < len(self.m_blockchain):
return self.m_blockchain[diff]
return []
def m_get_last_block(self):
if len(self.m_blockchain) == 0:
return False
return self.m_blockchain[-1]
def m_create_block(self, reveal_hash, vote_hash, last_block_number=-1):
myBlock = Block()
myBlock.create(self, reveal_hash, vote_hash, last_block_number)
slave_xmss = self.block_chain_buffer.get_slave_xmss(last_block_number +
1)
self.wallet.save_slave(slave_xmss)
return myBlock
def m_add_block(self, block_obj):
if len(self.m_blockchain) == 0:
self.m_read_chain()
if block_obj.validate_block(chain=self) is True:
if self.state.state_add_block(self, block_obj) is True:
self.m_blockchain.append(block_obj)
self.remove_tx_in_block_from_pool(block_obj)
else:
logger.info(
'last block failed state/stake checks, removed from chain')
self.state.state_validate_tx_pool(self)
return False
else:
logger.info('m_add_block failed - block failed validation.')
return False
self.m_f_sync_chain()
return True
def m_remove_last_block(self):
if not self.m_blockchain:
self.m_read_chain()
self.m_blockchain.pop()
def m_blockheight(self):
# return len(self.m_read_chain()) - 1
return self.height()
def height(self):
if len(self.m_blockchain):
return self.m_blockchain[-1].blockheader.blocknumber
return -1
def m_info_block(self, n):
if n > self.m_blockheight():
logger.info('No such block exists yet..')
return False
b = self.m_get_block(n)
logger.info(('Block: ', b, str(b.blockheader.blocknumber)))
logger.info(('Blocksize, ', str(len(json_bytestream(b)))))
logger.info(('Number of transactions: ', str(len(b.transactions))))
logger.info(('Validates: ', b.validate_block(self)))
def m_f_sync_chain(self):
if (self.m_blockchain[-1].blockheader.blocknumber +
1) % config.dev.disk_writes_after_x_blocks == 0:
self.f_write_m_blockchain()
return
def m_verify_chain(self, verbose=0):
for block in self.m_read_chain()[1:]:
if not block.validate_block(self):
return False
return True
# validate and update stake+state for newly appended block.
# can be streamlined to reduce repetition in the added components..
# finish next epoch code..
def add_tx_to_pool(self, tx_class_obj):
self.transaction_pool.append(tx_class_obj)
self.txhash_timestamp.append(tx_class_obj.txhash)
self.txhash_timestamp.append(time())
def remove_tx_from_pool(self, tx_class_obj):
self.transaction_pool.remove(tx_class_obj)
self.txhash_timestamp.pop(
self.txhash_timestamp.index(tx_class_obj.txhash) + 1)
self.txhash_timestamp.remove(tx_class_obj.txhash)
def show_tx_pool(self):
return self.transaction_pool
def remove_tx_in_block_from_pool(self, block_obj):
for tx in block_obj.transactions:
for txn in self.transaction_pool:
if tx.txhash == txn.txhash:
self.remove_tx_from_pool(txn)
def flush_tx_pool(self):
del self.transaction_pool[:]
def validate_tx_pool(
self): # invalid transactions are auto removed from pool..
for tr in self.transaction_pool:
if tr.validate_tx() is False:
self.remove_tx_from_pool(tr)
logger.info(('invalid tx: ', tr, 'removed from pool'))
return True
def create_my_tx(self, txfrom, txto, amount, fee=0):
if isinstance(txto, int):
txto = self.wallet.address_bundle[txto].address
xmss = self.wallet.address_bundle[txfrom].xmss
tx_state = self.block_chain_buffer.get_stxn_state(
self.block_chain_buffer.height() + 1, xmss.get_address())
tx = SimpleTransaction().create(tx_state=tx_state,
txto=txto,
amount=amount,
xmss=xmss,
fee=fee)
if tx and tx.state_validate_tx(tx_state=tx_state,
transaction_pool=self.transaction_pool):
self.add_tx_to_pool(tx)
self.wallet.save_wallet()
# need to keep state after tx ..use self.wallet.info to store index..
# far faster than loading the 55mb self.wallet..
return tx
return False
class Chain:
def __init__(self, state):
self.state = state
self.version_number = config.dev.version_number
self.transaction_pool = []
self.txhash_timestamp = []
self.m_blockchain = []
self.wallet = Wallet(self, state)
self.my = self.wallet.f_read_wallet()
self.mining_address = self.my[0][1].address
self.initialize()
self.ping_list = []
self.ip_list = []
self.blockheight_map = []
self.stake_list = []
self.stake_commit = []
self.block_chain_buffer = None # Initialized by node.py
self.prev_txpool = [None] * 1000 # TODO: use python dequeue
self.pending_tx_pool = []
self.pending_tx_pool_hash = []
self.stake_reveal_one = []
self.stake_ban_list = []
self.stake_ban_block = {}
self.stake_validator_latency = defaultdict(dict)
self.chain_dat_filename = os.path.join(config.user.data_path,
config.dev.mnemonic_filename)
def initialize(self):
logger.info('QRL blockchain ledger %s', self.version_number)
logger.info('loading db')
logger.info('loading wallet')
self.wallet.f_load_winfo()
logger.info('mining/staking address %s', self.mining_address)
def validate_reboot(self, mhash, nonce):
reboot_data = [
'2920c8ec34f04f59b7df4284a4b41ca8cbec82ccdde331dd2d64cc89156af653',
0
]
try:
reboot_data_db = self.state.db.get('reboot_data')
reboot_data = reboot_data_db
except:
pass
if reboot_data[1] >= nonce: # already used
msg = 'nonce in db ' + str(reboot_data[1])
msg += '\nnonce provided ' + str(nonce)
return None, msg
reboot_data[1] = nonce
output = mhash
for i in range(0, reboot_data[1]):
output = sha256(output)
if output != reboot_data[0]:
msg = 'expected hash ' + str(reboot_data[0])
msg += '\nhash found ' + str(output)
msg += '\nnonce provided ' + str(nonce) + "\n"
return None, msg
# reboot_data[1] += 1
# self.state.db.put('reboot_data', reboot_data)
return True, 'Success'
def generate_reboot_hash(self, key, nonce=None, blocknumber=0):
reboot_data = [
'2920c8ec34f04f59b7df4284a4b41ca8cbec82ccdde331dd2d64cc89156af653',
0
]
try:
reboot_data = self.state.db.get('reboot_data')
except:
pass
if nonce:
if reboot_data[1] > nonce:
return None, 'Nonce must be greater than or equals to ' + str(
reboot_data[1]) + '\r\n'
reboot_data[1] = int(nonce)
output = sha256(key)
for i in range(0, 40000 - reboot_data[1]):
output = sha256(output)
status, error = self.validate_reboot(output, reboot_data[1])
if not status:
return None, error
return json.dumps({
'hash': output,
'nonce': reboot_data[1],
'blocknumber': int(blocknumber)
}), "Reboot Initiated\r\n"
def get_sv(self, terminator):
for s in self.state.stake_list_get():
if terminator in s[1]:
return s[0]
return None
def reveal_to_terminator(self, reveal, blocknumber, add_loop=0):
tmp = sha256(reveal)
epoch = blocknumber // config.dev.blocks_per_epoch
for _ in range(blocknumber - (epoch * config.dev.blocks_per_epoch) +
add_loop):
tmp = sha256(tmp)
return tmp
def select_hashchain(self,
last_block_headerhash,
stake_address=None,
hashchain=None,
blocknumber=None):
if not hashchain:
for s in self.block_chain_buffer.stake_list_get(blocknumber):
if s[0] == stake_address:
hashchain = s[1]
break
if not hashchain:
return
target_chain = 0
for byte in last_block_headerhash:
target_chain += ord(byte)
target_chain = (target_chain - 1) % (config.dev.hashchain_nums - 1
) # 1 Primary hashchain size
return hashchain[-1], hashchain[target_chain]
def select_winners(self,
reveals,
topN=1,
blocknumber=None,
block=None,
seed=None):
winners = None
if not seed:
logger.info('Exception raised due to Seed is None')
raise Exception
if blocknumber:
winners = heapq.nsmallest(
topN,
reveals,
key=lambda reveal: self.score(
stake_address=self.get_sv(
self.reveal_to_terminator(
reveal, blocknumber, add_loop=1)),
reveal_one=reveal,
balance=self.block_chain_buffer.get_st_balance(
self.get_sv(
self.reveal_to_terminator(
reveal, blocknumber, add_loop=1)), blocknumber
),
seed=seed)
) # blocknumber+1 as we have one extra hash for the reveal
return winners
winners = heapq.nsmallest(
topN, reveals, key=lambda reveal: reveal[4]) # reveal[4] is score
winners_dict = {}
for winner in winners:
winners_dict[winner[3]] = winner # winner[3] is reveal_one
return winners_dict
@staticmethod
def score(stake_address, reveal_one, balance=0, seed=None, verbose=False):
if not seed:
logger.info('Exception Raised due to seed none in score fn')
raise Exception
if not balance:
logger.info(' balance 0 so score none ')
logger.info(' stake_address %s', stake_address)
return None
reveal_one_number = int(reveal_one, 16)
score = (Decimal(config.dev.N) -
(Decimal(reveal_one_number | seed).log10() /
Decimal(2).log10())) / Decimal(balance)
if verbose:
logger.info('Score - %s', score)
logger.info('reveal_one - %ld', reveal_one_number)
logger.info('seed - %ld', seed)
logger.info('balance - %ld', balance)
return score
def update_pending_tx_pool(self, tx, peer):
if len(self.pending_tx_pool) >= config.dev.blocks_per_epoch:
del self.pending_tx_pool[0]
del self.pending_tx_pool_hash[0]
self.pending_tx_pool.append([tx, peer])
self.pending_tx_pool_hash.append(tx.txhash)
def get_stake_validators_hash(self):
sv_hash = StringIO()
stakers = self.state.stake_list_get()
for staker in stakers:
balance = self.state.state_balance(staker[0])
sv_hash.write(staker[0] + str(balance))
sv_hash = sha256(sv_hash.getvalue())
return sv_hash
# create a block from a list of supplied tx_hashes, check state to ensure validity..
def create_stake_block(self, hashchain_hash, reveal_list, vote_hashes,
last_block_number):
t_pool2 = copy.deepcopy(self.transaction_pool)
del self.transaction_pool[:]
curr_epoch = int((last_block_number + 1) / config.dev.blocks_per_epoch)
# recreate the transaction pool as in the tx_hash_list, ordered by txhash..
d = defaultdict(int)
for tx in t_pool2:
if self.block_chain_buffer.pubhashExists(tx.txfrom, tx.pubhash,
last_block_number + 1):
continue
if tx.subtype == transaction.TX_SUBTYPE_STAKE:
epoch_blocknum = last_block_number - (
curr_epoch * config.dev.blocks_per_epoch)
# skip 1st st txn without tx.first_hash in case its beyond allowed epoch blocknumber
if (not tx.first_hash
) and epoch_blocknum >= config.dev.stake_before_x_blocks:
continue
if tx.epoch != curr_epoch:
logger.warning(
'Skipping st as epoch mismatch, CreateBlock()')
logger.warning('Expected st epoch : %s', curr_epoch)
logger.warning('Found st epoch : %s', tx.epoch)
continue
balance = 0
for st in self.block_chain_buffer.next_stake_list_get(
last_block_number + 1):
if st[1] == tx.hash:
balance = st[-1]
break
# balance>0 only in case 1st st txn without first_hash done
if not (balance > 0 or last_block_number == 0):
if tx.first_hash:
continue
self.add_tx_to_pool(tx)
d[tx.txfrom] += 1
tx.nonce = self.block_chain_buffer.get_stxn_state(
last_block_number + 1, tx.txfrom)[0] + d[tx.txfrom]
if tx.txfrom == self.mining_address:
tx.nonce += 1
# create the block..
block_obj = self.m_create_block(hashchain_hash, reveal_list,
vote_hashes, last_block_number)
# reset the pool back
self.transaction_pool = copy.deepcopy(t_pool2)
return block_obj
# return a sorted list of txhashes from transaction_pool, sorted by timestamp from block n
# (actually from start of transaction_pool) to time, then ordered by txhash.
def sorted_tx_pool(self, timestamp=None):
if timestamp is None:
timestamp = time()
pool = copy.deepcopy(self.transaction_pool)
trimmed_pool = []
end_time = timestamp
for tx in pool:
if self.txhash_timestamp[self.txhash_timestamp.index(tx.txhash) +
1] <= end_time:
trimmed_pool.append(tx.txhash)
trimmed_pool.sort()
if not trimmed_pool:
return False
return trimmed_pool
@staticmethod
def closest_hash(list_hash):
"""
returns the closest hash in numerical terms to merkle root hash of all the supplied hashes..
:param list_hash:
:return:
"""
if isinstance(list_hash, list):
if len(list_hash) == 1:
return False, False
if isinstance(list_hash, str):
if len(list_hash) == 64:
return False, False
list_hash.sort()
root = merkle_tx_hash(list_hash)
p = []
for l in list_hash:
p.append(int(l, 16))
closest = closest_number(int(root, 16), p)
return ''.join(list_hash[p.index(closest)]), root
def is_stake_banned(self, stake_address):
if stake_address in self.stake_ban_list:
epoch_diff = (self.height() / config.dev.blocks_per_epoch) - (
self.stake_ban_block[stake_address] /
config.dev.blocks_per_epoch)
if self.height(
) - self.stake_ban_block[stake_address] > 10 or epoch_diff > 0:
logger.info('Stake removed from ban list')
del self.stake_ban_block[stake_address]
self.stake_ban_list.remove(stake_address)
return False
return True
return False
def pos_block_pool(self, n=1.5):
"""
create a snapshot of the transaction pool to account for network traversal time (probably less than 300ms, but let's give a window of 1.5 seconds).
:param n:
:return: list of merkle root hashes of the tx pool over last 1.5 seconds
"""
timestamp = time()
start_time = timestamp - n
x = self.sorted_tx_pool(start_time)
y = self.sorted_tx_pool(timestamp)
if not y: # if pool is empty -> return sha256 null
return [sha256('')], [[]]
elif x == y: # if the pool isnt empty but there is no difference then return the only merkle hash possible..
return [merkle_tx_hash(y)], [y]
else: # there is a difference in contents of pool over last 1.5 seconds..
merkle_hashes = []
txhashes = []
if not x:
merkle_hashes.append(sha256(''))
x = []
txhashes.append(x)
else:
merkle_hashes.append(merkle_tx_hash(x))
txhashes.append(x)
tmp_txhashes = x
for tx in reversed(self.transaction_pool):
if tx.txhash in y and tx.txhash not in x:
tmp_txhashes.append(tx.txhash)
tmp_txhashes.sort()
merkle_hashes.append(merkle_tx_hash(tmp_txhashes))
txhashes.append(tmp_txhashes)
return merkle_hashes, txhashes
@staticmethod
def pos_block_selector(seed, n):
"""
create the PRF selector sequence based upon a seed and number
of stakers in list (temporary..there are better ways to do this
with bigger seed value, but it works)
:param seed:
:param n:
:return:
"""
n_bits = int(ceil(log(n, 2)))
prf = GEN_range_bin(seed, 1, 20000, 1)
prf_range = []
for z in prf:
x = ord(z) >> 8 - n_bits
if x < n:
prf_range.append(x)
return prf_range
def pos_block_selector_n(self, seed, n, i):
"""
return the POS staker list position for given seed at index, i
:param seed:
:param n:
:param i:
:return:
"""
l = self.pos_block_selector(seed, n)
return l[i]
#### move from here
# tx, address chain search functions
def search_telnet(self, txcontains, islong=1):
tx_list = []
hrs_list = []
# because we allow hrs substitution in txto for transactions, we need to identify where this occurs for searching..
if txcontains[0] == 'Q':
for block in self.m_blockchain:
for tx in block.transactions:
if tx.txfrom == txcontains:
if len(tx.hrs) > 0:
if self.state.state_hrs(tx.hrs) == txcontains:
hrs_list.append(tx.hrs)
for tx in self.transaction_pool:
if tx.txhash == txcontains or tx.txfrom == txcontains or tx.txto == txcontains or tx.txto in hrs_list:
if islong == 0:
tx_list.append('<tx:txhash> ' + tx.txhash +
' <transaction_pool>')
if islong == 1: tx_list.append(json_print_telnet(tx))
for block in self.m_blockchain:
for tx in block.transactions:
if tx.txhash == txcontains or tx.txfrom == txcontains or tx.txto == txcontains or tx.txto in hrs_list:
# logger.info(( txcontains, 'found in block',str(block.blockheader.blocknumber),'..'
if islong == 0:
tx_list.append('<tx:txhash> ' + tx.txhash +
' <block> ' +
str(block.blockheader.blocknumber))
if islong == 1: tx_list.append(json_print_telnet(tx))
return tx_list
# used for port 80 api - produces JSON output of a specific tx hash, including status of tx, in a block or unconfirmed + timestampe of parent block
def search_txhash(self, txhash): # txhash is unique due to nonce.
err = {
'status': 'Error',
'error': 'txhash not found',
'method': 'txhash',
'parameter': txhash
}
for tx in self.transaction_pool:
if tx.txhash == txhash:
logger.info('%s found in transaction pool..', txhash)
tx_new = copy.deepcopy(tx)
tx_new.block = 'unconfirmed'
tx_new.hexsize = len(json_bytestream(tx_new))
tx_new.status = 'ok'
return json_print_telnet(tx_new)
try:
txn_metadata = self.state.db.get(txhash)
except:
logger.info(
'%s does not exist in memory pool or local blockchain..',
txhash)
return json_print_telnet(err)
json_tx = json.loads(txn_metadata[0])
if json_tx['subtype'] == transaction.TX_SUBTYPE_TX:
tx = SimpleTransaction().json_to_transaction(txn_metadata[0])
elif json_tx['subtype'] == transaction.TX_SUBTYPE_COINBASE:
tx = CoinBase().json_to_transaction(txn_metadata[0])
tx_new = copy.deepcopy(tx)
tx_new.block = txn_metadata[1]
tx_new.timestamp = txn_metadata[2]
tx_new.confirmations = self.m_blockheight() - txn_metadata[1]
tx_new.hexsize = len(json_bytestream(tx_new))
tx_new.amount = tx_new.amount / 100000000.000000000
if json_tx['subtype'] == transaction.TX_SUBTYPE_TX:
tx_new.fee = tx_new.fee / 100000000.000000000
logger.info('%s found in block %s', txhash, str(txn_metadata[1]))
tx_new.status = 'ok'
return json_print_telnet(tx_new)
def basic_info(self, address):
addr = {}
if not self.state.state_address_used(address):
addr['status'] = 'error'
addr['error'] = 'Address not found'
addr['parameter'] = address
return json_print_telnet(addr)
nonce, balance, _ = self.state.state_get_address(address)
addr['state'] = {}
addr['state']['address'] = address
addr['state']['balance'] = balance / 100000000.000000000
addr['state']['nonce'] = nonce
addr['state']['transactions'] = self.state.state_get_txn_count(address)
addr['status'] = 'ok'
return json_print_telnet(addr)
# used for port 80 api - produces JSON output reporting every transaction for an address, plus final balance..
def search_address(self, address):
addr = {'transactions': []}
txnhash_added = set()
if not self.state.state_address_used(address):
addr['status'] = 'error'
addr['error'] = 'Address not found'
addr['parameter'] = address
return json_print_telnet(addr)
nonce, balance, pubhash_list = self.state.state_get_address(address)
addr['state'] = {}
addr['state']['address'] = address
addr['state']['balance'] = balance / 100000000.000000000
addr['state']['nonce'] = nonce
for s in self.state.stake_list_get():
if address == s[0]:
addr['stake'] = {}
addr['stake']['selector'] = s[2]
# pubhashes used could be put here..
tmp_transactions = []
for tx in self.transaction_pool:
if tx.subtype not in (transaction.TX_SUBTYPE_TX,
transaction.TX_SUBTYPE_COINBASE):
continue
if tx.txto == address or tx.txfrom == address:
logger.info('%s found in transaction pool', address)
tmp_txn = {
'subtype': tx.subtype,
'txhash': tx.txhash,
'block': 'unconfirmed',
'amount': tx.amount / 100000000.000000000,
'nonce': tx.nonce,
'ots_key': tx.ots_key,
'txto': tx.txto,
'txfrom': tx.txfrom,
'timestamp': 'unconfirmed'
}
if tx.subtype == transaction.TX_SUBTYPE_TX:
tmp_txn['fee'] = tx.fee / 100000000.000000000
tmp_transactions.append(tmp_txn)
txnhash_added.add(tx.txhash)
addr['transactions'] = tmp_transactions
my_txn = []
try:
my_txn = self.state.db.get('txn_' + address)
except:
pass
for txn_hash in my_txn:
txn_metadata = self.state.db.get(txn_hash)
dict_txn_metadata = json.loads(txn_metadata[0])
if dict_txn_metadata['subtype'] == transaction.TX_SUBTYPE_TX:
tx = SimpleTransaction().json_to_transaction(txn_metadata[0])
elif dict_txn_metadata[
'subtype'] == transaction.TX_SUBTYPE_COINBASE:
tx = CoinBase().json_to_transaction(txn_metadata[0])
if (tx.txto == address or tx.txfrom
== address) and tx.txhash not in txnhash_added:
logger.info('%s found in block %s', address,
str(txn_metadata[1]))
tmp_txn = {
'subtype': tx.subtype,
'txhash': tx.txhash,
'block': txn_metadata[1],
'timestamp': txn_metadata[2],
'amount': tx.amount / 100000000.000000000,
'nonce': tx.nonce,
'ots_key': tx.ots_key,
'txto': tx.txto,
'txfrom': tx.txfrom
}
if tx.subtype == transaction.TX_SUBTYPE_TX:
tmp_txn['fee'] = tx.fee / 100000000.000000000
addr['transactions'].append(tmp_txn)
txnhash_added.add(tx.txhash)
if len(addr['transactions']) > 0:
addr['state']['transactions'] = len(addr['transactions'])
if addr == {'transactions': {}}:
addr = {
'status': 'error',
'error': 'address not found',
'method': 'address',
'parameter': address
}
else:
addr['status'] = 'ok'
return json_print_telnet(addr)
def last_unconfirmed_tx(self, n=1):
addr = {'transactions': []}
error = {
'status': 'error',
'error': 'invalid argument',
'method': 'last_tx',
'parameter': n
}
try:
n = int(n)
except:
return json_print_telnet(error)
if n <= 0 or n > 20:
return json_print_telnet(error)
tx_num = len(self.transaction_pool)
while tx_num > 0:
tx_num -= 1
tx = self.transaction_pool[tx_num]
if tx.subtype != transaction.TX_SUBTYPE_TX:
continue
tmp_txn = {
'txhash': tx.txhash,
'block': 'unconfirmed',
'timestamp': 'unconfirmed',
'amount': tx.amount / 100000000.000000000,
'type': tx.type
}
addr['transactions'].append(tmp_txn)
addr['status'] = 'ok'
return json_print_telnet(addr)
# return json info on last n tx in the blockchain
def last_tx(self, n=1):
addr = {'transactions': []}
error = {
'status': 'error',
'error': 'invalid argument',
'method': 'last_tx',
'parameter': n
}
try:
n = int(n)
except:
return json_print_telnet(error)
if n <= 0 or n > 20:
return json_print_telnet(error)
try:
last_txn = self.state.db.get('last_txn')
except Exception:
error['error'] = 'txnhash not found'
return json_print_telnet(error)
n = min(len(last_txn), n)
while n > 0:
n -= 1
tx_meta = last_txn[n]
tx = SimpleTransaction().json_to_transaction(tx_meta[0])
tmp_txn = {
'txhash': tx.txhash,
'block': tx_meta[1],
'timestamp': tx_meta[2],
'amount': tx.amount / 100000000.000000000,
'type': tx.subtype
}
addr['transactions'].append(tmp_txn)
addr['status'] = 'ok'
return json_print_telnet(addr)
def richlist(self, n=None):
"""
only feasible while chain is small..
:param n:
:return:
"""
if not n:
n = 5
error = {
'status': 'error',
'error': 'invalid argument',
'method': 'richlist',
'parameter': n
}
try:
n = int(n)
except:
return json_print_telnet(error)
if n <= 0 or n > 20:
return json_print_telnet(error)
if not self.state.state_uptodate(self.m_blockheight()):
return json_print_telnet({
'status': 'error',
'error': 'leveldb failed',
'method': 'richlist'
})
addr = self.state.db.return_all_addresses()
richlist = sorted(addr, key=itemgetter(1), reverse=True)
rl = {'richlist': {}}
if len(richlist) < n:
n = len(richlist)
for rich in richlist[:n]:
rl['richlist'][richlist.index(rich) + 1] = {}
rl['richlist'][richlist.index(rich) + 1]['address'] = rich[0]
rl['richlist'][richlist.index(rich) +
1]['balance'] = rich[1] / 100000000.000000000
rl['status'] = 'ok'
return json_print_telnet(rl)
# return json info on last n blocks
def last_block(self, n=1):
error = {
'status': 'error',
'error': 'invalid argument',
'method': 'last_block',
'parameter': n
}
try:
n = int(n)
except:
return json_print_telnet(error)
if n <= 0 or n > 20:
return json_print_telnet(error)
lb = []
beginning = self.height() - n
for blocknum in range(self.height(), beginning - 1, -1):
block = self.m_get_block(blocknum)
lb.append(block)
last_blocks = {'blocks': []}
i = 0
for block in lb[1:]:
i += 1
tmp_block = {
'blocknumber':
block.blockheader.blocknumber,
'block_reward':
block.blockheader.block_reward / 100000000.00000000,
'blockhash':
block.blockheader.prev_blockheaderhash,
'timestamp':
block.blockheader.timestamp,
'block_interval':
lb[i - 1].blockheader.timestamp - block.blockheader.timestamp,
'number_transactions':
len(block.transactions)
}
last_blocks['blocks'].append(tmp_block)
last_blocks['status'] = 'ok'
return json_print_telnet(last_blocks)
# return json info on stake_commit list
def stake_commits(self, data=None):
sc = {'status': 'ok', 'commits': {}}
for c in self.stake_commit:
# [stake_address, block_number, merkle_hash_tx, commit_hash]
sc['commits'][str(c[1]) + '-' + c[3]] = {}
sc['commits'][str(c[1]) + '-' + c[3]]['stake_address'] = c[0]
sc['commits'][str(c[1]) + '-' + c[3]]['block_number'] = c[1]
sc['commits'][str(c[1]) + '-' + c[3]]['merkle_hash_tx'] = c[2]
sc['commits'][str(c[1]) + '-' + c[3]]['commit_hash'] = c[3]
return json_print_telnet(sc)
def stakers(self, data=None):
# (stake -> address, hash_term, nonce)
stakers = {'status': 'ok', 'stake_list': []}
for s in self.state.stake_list_get():
tmp_stakers = {
'address': s[0],
'balance': self.state.state_balance(s[0]) / 100000000.00000000,
'hash_terminator': s[1],
'nonce': s[2]
}
stakers['stake_list'].append(tmp_stakers)
return json_print_telnet(stakers)
def next_stakers(self, data=None):
# (stake -> address, hash_term, nonce)
next_stakers = {'status': 'ok', 'stake_list': []}
for s in self.state.next_stake_list_get():
tmp_stakers = {
'address': s[0],
'balance': self.state.state_balance(s[0]) / 100000000.00000000,
'hash_terminator': s[1],
'nonce': s[2]
}
next_stakers['stake_list'].append(tmp_stakers)
return json_print_telnet(next_stakers)
@staticmethod
def exp_win(data=None):
# TODO: incomplete
ew = {'status': 'ok', 'expected_winner': {}}
return json_print_telnet(ew)
def stake_reveal_ones(self, data=None):
sr = {'status': 'ok', 'reveals': {}}
for c in self.stake_reveal_one:
sr['reveals'][str(c[1]) + '-' + str(c[2])] = {}
sr['reveals'][str(c[1]) + '-' + str(c[2])]['stake_address'] = c[0]
sr['reveals'][str(c[1]) + '-' + str(c[2])]['block_number'] = c[2]
sr['reveals'][str(c[1]) + '-' + str(c[2])]['headerhash'] = c[1]
sr['reveals'][str(c[1]) + '-' + str(c[2])]['reveal'] = c[3]
return json_print_telnet(sr)
def ip_geotag(self, data=None):
ip = {'status': 'ok', 'ip_geotag': self.ip_list}
x = 0
for i in self.ip_list:
ip['ip_geotag'][x] = i
x += 1
return json_print_telnet(ip)
def stake_reveals(self, data=None):
sr = {'status': 'ok', 'reveals': {}}
# chain.stake_reveal.append([stake_address, block_number, merkle_hash_tx, reveal])
for c in self.stake_reveal:
sr['reveals'][str(c[1]) + '-' + c[3]] = {}
sr['reveals'][str(c[1]) + '-' + c[3]]['stake_address'] = c[0]
sr['reveals'][str(c[1]) + '-' + c[3]]['block_number'] = c[1]
sr['reveals'][str(c[1]) + '-' + c[3]]['merkle_hash_tx'] = c[2]
sr['reveals'][str(c[1]) + '-' + c[3]]['reveal'] = c[3]
return json_print_telnet(sr)
def search(self, txcontains, islong=1):
for tx in self.transaction_pool:
if tx.txhash == txcontains or tx.txfrom == txcontains or tx.txto == txcontains:
logger.info('%s found in transaction pool..', txcontains)
if islong == 1: json_print(tx)
for block in self.m_blockchain:
for tx in block.transactions:
if tx.txhash == txcontains or tx.txfrom == txcontains or tx.txto == txcontains:
logger.info('%s found in block %s', txcontains,
str(block.blockheader.blocknumber))
if islong == 0: logger.info(('<tx:txhash> ' + tx.txhash))
if islong == 1: json_print(tx)
return
@staticmethod
def get_chaindatafile(epoch):
baseDir = os.path.join(config.user.data_path,
config.dev.chain_file_directory)
config.create_path(baseDir)
return os.path.join(baseDir, 'chain.da' + str(epoch))
def f_read_chain(self, epoch):
delimiter = config.dev.binary_file_delimiter
block_list = []
if os.path.isfile(self.get_chaindatafile(epoch)) is False:
if epoch != 0:
return []
logger.info('Creating new chain file')
genesis_block = CreateGenesisBlock(self)
block_list.append(genesis_block)
return block_list
try:
with open(self.get_chaindatafile(epoch), 'rb') as myfile:
jsonBlock = StringIO()
tmp = ""
count = 0
offset = 0
while True:
chars = myfile.read(config.dev.chain_read_buffer_size)
for char in chars:
offset += 1
if count > 0 and char != delimiter[count]:
count = 0
jsonBlock.write(tmp)
tmp = ""
if char == delimiter[count]:
tmp += delimiter[count]
count += 1
if count < len(delimiter):
continue
tmp = ""
count = 0
compressedBlock = jsonBlock.getvalue()
pos = offset - len(delimiter) - len(
compressedBlock)
jsonBlock = bz2.decompress(compressedBlock)
block = Block.from_json(jsonBlock)
self.update_block_metadata(
block.blockheader.blocknumber, pos,
len(compressedBlock))
block_list.append(block)
jsonBlock = StringIO()
continue
jsonBlock.write(char)
if len(chars) < config.dev.chain_read_buffer_size:
break
except Exception as e:
logger.error('IO error %s', e)
return []
gc.collect()
return block_list
def update_block_metadata(self, blocknumber, blockPos, blockSize):
self.state.db.db.Put('block_' + str(blocknumber),
str(blockPos) + ',' + str(blockSize))
def update_last_tx(self, block):
if len(block.transactions) == 0:
return
last_txn = []
try:
last_txn = self.state.db.get('last_txn')
except:
pass
for txn in block.transactions[-20:]:
if txn.subtype == transaction.TX_SUBTYPE_TX:
last_txn.insert(0, [
txn.transaction_to_json(), block.blockheader.blocknumber,
block.blockheader.timestamp
])
del last_txn[20:]
self.state.db.put('last_txn', last_txn)
def update_wallet_tx_metadata(self, addr, new_txhash):
try:
txhash = self.state.db.get('txn_' + addr)
except Exception:
txhash = []
txhash.append(new_txhash)
self.state.db.put('txn_' + addr, txhash)
def update_txn_count(self, txto, txfrom):
last_count = self.state.state_get_txn_count(txto)
self.state.db.put('txn_count_' + txto, last_count + 1)
last_count = self.state.state_get_txn_count(txfrom)
self.state.db.put('txn_count_' + txfrom, last_count + 1)
def update_tx_metadata(self, block):
if len(block.transactions) == 0:
return
for txn in block.transactions:
if txn.subtype in (transaction.TX_SUBTYPE_TX,
transaction.TX_SUBTYPE_COINBASE):
self.state.db.put(txn.txhash, [
txn.transaction_to_json(), block.blockheader.blocknumber,
block.blockheader.timestamp
])
if txn.subtype == transaction.TX_SUBTYPE_TX:
self.update_wallet_tx_metadata(txn.txfrom, txn.txhash)
self.update_wallet_tx_metadata(txn.txto, txn.txhash)
self.update_txn_count(txn.txto, txn.txfrom)
def f_write_m_blockchain(self):
blocknumber = self.m_blockchain[-1].blockheader.blocknumber
suffix = int(blocknumber // config.dev.blocks_per_chain_file)
writeable = self.m_blockchain[-config.dev.disk_writes_after_x_blocks:]
logger.info('Appending data to chain')
with open(self.get_chaindatafile(suffix), 'ab') as myfile:
for block in writeable:
jsonBlock = json_bytestream(block)
compressedBlock = bz2.compress(jsonBlock,
config.dev.compression_level)
pos = myfile.tell()
blockSize = len(compressedBlock)
self.update_block_metadata(block.blockheader.blocknumber, pos,
blockSize)
myfile.write(compressedBlock)
myfile.write(config.dev.binary_file_delimiter)
del self.m_blockchain[:-1]
gc.collect()
return
def load_chain_by_epoch(self, epoch):
chains = self.f_read_chain(epoch)
self.m_blockchain.append(chains[0])
self.state.state_read_genesis(self.m_get_block(0))
self.block_chain_buffer = ChainBuffer(self)
for block in chains[1:]:
self.block_chain_buffer.add_block_mainchain(
block, verify_block_reveal_list=False, validate=False)
return self.m_blockchain
def m_load_chain(self):
del self.m_blockchain[:]
self.state.db.zero_all_addresses()
chains = self.f_read_chain(0)
self.m_blockchain.append(chains[0])
self.state.state_read_genesis(self.m_get_block(0))
self.block_chain_buffer = ChainBuffer(self)
for block in chains[1:]:
self.block_chain_buffer.add_block_mainchain(
block, verify_block_reveal_list=False, validate=False)
if len(self.m_blockchain) < config.dev.blocks_per_chain_file:
return self.m_blockchain
epoch = 1
while os.path.isfile(self.get_chaindatafile(epoch)):
del self.m_blockchain[:-1]
chains = self.f_read_chain(epoch)
for block in chains:
self.block_chain_buffer.add_block_mainchain(
block, verify_block_reveal_list=False, validate=False)
epoch += 1
gc.collect()
return self.m_blockchain
def m_read_chain(self):
if not self.m_blockchain:
self.m_load_chain()
return self.m_blockchain
def load_from_file(self, blocknum):
epoch = int(blocknum // config.dev.blocks_per_chain_file)
with open(self.get_chaindatafile(epoch), 'rb') as f:
pos_size = self.state.db.db.Get('block_' + str(blocknum))
pos, size = pos_size.split(',')
pos = int(pos)
size = int(size)
f.seek(pos)
jsonBlock = bz2.decompress(f.read(size))
block = Block.from_json(jsonBlock)
return block
def m_get_block(self, n):
# FIXME: It is bad that this returns two different types
if len(self.m_blockchain) == 0:
return False
beginning_blocknum = self.m_blockchain[0].blockheader.blocknumber
diff = n - beginning_blocknum
if diff < 0:
return self.load_from_file(n)
if diff < len(self.m_blockchain):
return self.m_blockchain[diff]
return False
def m_get_last_block(self):
if len(self.m_blockchain) == 0:
return False
return self.m_blockchain[-1]
def m_create_block(self,
nonce,
reveal_list=None,
vote_hashes=None,
last_block_number=-1):
myBlock = Block()
myBlock.create(self, nonce, reveal_list, vote_hashes,
last_block_number)
return myBlock
def m_add_block(self, block_obj, verify_block_reveal_list=True):
if len(self.m_blockchain) == 0:
self.m_read_chain()
if block_obj.validate_block(
chain=self,
verify_block_reveal_list=verify_block_reveal_list) is True:
if self.state.state_add_block(self, block_obj) is True:
self.m_blockchain.append(block_obj)
self.remove_tx_in_block_from_pool(block_obj)
else:
logger.info(
'last block failed state/stake checks, removed from chain')
self.state.state_validate_tx_pool(self)
return False
else:
logger.info('m_add_block failed - block failed validation.')
return False
self.m_f_sync_chain()
return True
def m_remove_last_block(self):
if not self.m_blockchain:
self.m_read_chain()
self.m_blockchain.pop()
def m_blockheight(self):
# return len(self.m_read_chain()) - 1
return self.height()
def height(self):
if len(self.m_blockchain):
return self.m_blockchain[-1].blockheader.blocknumber
return -1
def m_info_block(self, n):
if n > self.m_blockheight():
logger.info('No such block exists yet..')
return False
b = self.m_get_block(n)
logger.info(('Block: ', b, str(b.blockheader.blocknumber)))
logger.info(('Blocksize, ', str(len(json_bytestream(b)))))
logger.info(('Number of transactions: ', str(len(b.transactions))))
logger.info(('Validates: ', b.validate_block(self)))
def m_f_sync_chain(self):
if (self.m_blockchain[-1].blockheader.blocknumber +
1) % config.dev.disk_writes_after_x_blocks == 0:
self.f_write_m_blockchain()
return
def m_verify_chain(self, verbose=0):
for block in self.m_read_chain()[1:]:
if block.validate_block(self) is False:
return False
return True
def m_verify_chain_250(
self,
verbose=0
): # validate the last 250 blocks or len(m_blockchain)-1..
n = 0
if len(self.m_blockchain) > 250:
x = 250
else:
if len(self.m_blockchain) == 1:
return True
x = len(self.m_blockchain) - 1
for block in self.m_read_chain()[-x:]:
if self.validate_block(block, verbose=verbose) is False:
logger.info(('block failed:', block.blockheader.blocknumber))
return False
n += 1
if verbose is 1:
sys.stdout.write('.')
sys.stdout.flush()
return True
# validate and update stake+state for newly appended block.
# can be streamlined to reduce repetition in the added components..
# finish next epoch code..
def add_tx_to_pool(self, tx_class_obj):
self.transaction_pool.append(tx_class_obj)
self.txhash_timestamp.append(tx_class_obj.txhash)
self.txhash_timestamp.append(time())
def remove_tx_from_pool(self, tx_class_obj):
self.transaction_pool.remove(tx_class_obj)
self.txhash_timestamp.pop(
self.txhash_timestamp.index(tx_class_obj.txhash) + 1)
self.txhash_timestamp.remove(tx_class_obj.txhash)
def show_tx_pool(self):
return self.transaction_pool
def remove_tx_in_block_from_pool(self, block_obj):
for tx in block_obj.transactions:
for txn in self.transaction_pool:
if tx.txhash == txn.txhash:
self.remove_tx_from_pool(txn)
def flush_tx_pool(self):
del self.transaction_pool[:]
def validate_tx_pool(
self): # invalid transactions are auto removed from pool..
for transaction in self.transaction_pool:
if transaction.validate_tx() is False:
self.remove_tx_from_pool(transaction)
logger.info(('invalid tx: ', transaction, 'removed from pool'))
return True
def create_my_tx(self, txfrom, txto, amount, fee=0):
if isinstance(txto, int):
txto = self.my[txto][0]
xmss = self.my[txfrom][1]
tx_state = self.block_chain_buffer.get_stxn_state(
self.block_chain_buffer.height() + 1, xmss.address)
tx = SimpleTransaction().create(tx_state=tx_state,
txto=txto,
amount=amount,
xmss=xmss,
fee=fee)
if tx and tx.state_validate_tx(tx_state=tx_state,
transaction_pool=self.transaction_pool):
self.add_tx_to_pool(tx)
self.wallet.f_save_winfo(
) # need to keep state after tx ..use self.wallet.info to store index..far faster than loading the 55mb self.wallet..
return tx
return False
