def load_boot_file():
normal_path = os.path.join(os.path.abspath(os.path.dirname(__file__)),
'boot.dat')
extra_path = os.path.join(V.DB_HOME_DIR, 'boot.dat')
if os.path.exists(normal_path):
with open(normal_path, mode='br') as fp:
data = bjson.loads(
b64decode(fp.read().replace(b'\n', b'').replace(b'\r', b'')))
elif os.path.exists(extra_path):
with open(extra_path, mode='br') as fp:
data = bjson.loads(
b64decode(fp.read().replace(b'\n', b'').replace(b'\r', b'')))
else:
raise FileNotFoundError('Cannot find boot.dat "{}" or "{}" ?'.format(
normal_path, extra_path))
genesis_block = Block(binary=data['block'])
genesis_block.flag = C.BLOCK_GENESIS
genesis_block.height = 0
for b_tx in data['txs']:
tx = TX(binary=b_tx)
tx.height = 0
genesis_block.txs.append(tx)
connections = data.get('connections', list())
network_ver = data['network_ver']
return genesis_block, network_ver, connections
def put_to_block_stack(r, before_waiter):
block_tmp = dict()
batch_txs = list()
for block_b, block_height, block_flag, txs in r:
block = Block(binary=block_b)
block.height = block_height
block.flag = block_flag
for tx_b, tx_signature in txs:
tx = TX(binary=tx_b)
tx.height = None
tx.signature = tx_signature
tx_from_database = tx_builder.get_tx(txhash=tx.hash)
if tx_from_database:
block.txs.append(tx_from_database)
else:
block.txs.append(tx)
block_tmp[block_height] = block
batch_txs.extend(block.txs)
# check
if len(block_tmp) == 0:
return None
batch_sign_cashe(batch_txs)
before_waiter.wait()
with write_protect_lock:
block_stack.update(block_tmp)
return batch_workhash(tuple(block_tmp.values()))
def check_block(block: Block):
# 挿入前にBlockの正当性チェック
if block.f_orphan:
raise BlockChainError('Block is orphan.')
elif len(block.txs) == 0:
raise BlockChainError('Block don\'t have any txs.')
elif block.getsize() > C.SIZE_BLOCK_LIMIT:
raise BlockChainError('Block size is too large [{}b>{}b]'.format(block.getsize(), C.SIZE_BLOCK_LIMIT))
bits = get_bits_by_hash(previous_hash=block.previous_hash, consensus=block.flag)[0]
if block.bits != bits:
raise BlockChainError('Block bits differ from calc. [{}!={}]'.format(block.bits, bits))
logging.debug("Checked block {}.".format(block))
async def getwork(*args, **kwargs):
# https://en.bitcoin.it/wiki/Getwork
if len(args) == 0:
now = int(time() - V.BLOCK_GENESIS_TIME)
for block in getwork_cashe.values():
if block.previous_hash != builder.best_block.hash:
continue
if now - block.time < 10:
mining_block = block
break
else:
mining_block = await get_mining_block(**kwargs)
getwork_cashe[mining_block.merkleroot] = mining_block
mining_block.bits2target()
# Pre-processed SHA-2 input chunks
data = mining_block.b # 80 bytes
data += unhexlify(b'800000000000000000000000000000000000000000000000'
b'000000000000000000000000000000000000000000000280'
) # 48+80=128bytes
new_data = b''
for i in range(0, 128, 4):
new_data += data[i:i + 4][::-1]
if extra_target:
return {
"data": hexlify(new_data).decode(),
"target": hexlify(extra_target.to_bytes(32, 'big')).decode()
}
else:
return {
"data": hexlify(new_data).decode(),
"target": hexlify(mining_block.target_hash).decode()
}
else:
data = unhexlify(args[0].encode())
new_data = b''
for i in range(0, 128, 4):
new_data += data[i:i + 4][::-1]
block = Block(binary=new_data[:80])
if block.previous_hash != builder.best_block.hash:
return 'PreviousHash don\'t match.'
if block.merkleroot in getwork_cashe:
block.txs.extend(getwork_cashe[block.merkleroot].txs)
result = await submitblock(block, **kwargs)
if result is None:
return True
elif extra_target and block.pow_check(extra_target=extra_target):
return True
else:
logging.debug("GetWorkReject by \"{}\"".format(result))
return result
else:
logging.debug("GetWorkReject by \"Not found merkleroot.\"")
return 'Not found merkleroot.'
async def submitblock(block_hex_or_obj, **kwargs):
if isinstance(block_hex_or_obj, str):
block_bin = unhexlify(block_hex_or_obj.encode())
# Block
mined_block = Block(binary=block_bin[:80])
if mined_block.previous_hash != builder.best_block.hash:
return 'PreviousHash don\'t match.'
previous_block = builder.get_block(mined_block.previous_hash)
mined_block.height = previous_block.height + 1
mined_block.flag = int(kwargs['password'])
# tx length
storage_flag = int.from_bytes(block_bin[80:81], 'little')
if storage_flag < 0xfd:
tx_len = storage_flag
pos = 81
elif storage_flag == 0xfd:
tx_len = int.from_bytes(block_bin[81:83], 'little')
pos = 83
elif storage_flag == 0xfe:
tx_len = int.from_bytes(block_bin[81:85], 'little')
pos = 85
else: # == 0xff
tx_len = int.from_bytes(block_bin[81:89], 'little')
pos = 89
if F_HEAVY_DEBUG:
logging.debug("RpcSubmit block: pos={}, tx_len={}".format(
pos, tx_len))
# correct txs
while len(block_bin) > pos:
tx = TX()
tx.b = block_bin
tx.deserialize(first_pos=pos, f_raise=False)
if tx.version != __chain_version__:
return 'tx_ver do not match [{}!={}]'.format(
tx.version, __chain_version__)
pos += len(tx.b)
mined_block.txs.append(
tx_builder.get_tx(txhash=tx.hash, default=tx))
# check
if tx_len != len(mined_block.txs):
return 'Do not match txlen [{}!={}]'.format(
tx_len, len(mined_block.txs))
if pos != len(block_bin):
return 'Do not match pos [{}!={}]'.format(pos, len(block_bin))
elif isinstance(block_hex_or_obj, Block):
mined_block = block_hex_or_obj
previous_block = builder.get_block(mined_block.previous_hash)
mined_block.height = previous_block.height + 1
mined_block.flag = int(kwargs['password'])
else:
return 'Unknown input? -> {}'.format(block_hex_or_obj)
mined_block.update_pow()
if mined_block.pow_check():
confirmed_generating_block(mined_block)
return None # accepted
else:
return 'not satisfied work.'
def make_block_by_node(blockhash):
""" create Block by outside node """
r = ask_node(cmd=DirectCmd.BLOCK_BY_HASH, data={'blockhash': blockhash})
if isinstance(r, str):
raise BlockChainError('make_block_by_node() failed, by "{}"'.format(hexlify(blockhash).decode(), r))
block = Block(binary=r['block'])
block.flag = r['flag']
before_block = builder.get_block(blockhash=block.previous_hash)
if before_block is None:
raise BlockChainError('Not found BeforeBeforeBlock {}'.format(hexlify(block.previous_hash).decode()))
block.height = before_block.height + 1
for tx in r['txs']:
_tx = TX(binary=tx['tx'])
_tx.height = block.height
_tx.signature = tx['sign']
block.txs.append(_tx)
return block
def fill_newblock_info(data):
new_block = Block(binary=data['block'])
logging.debug("Fill newblock={}".format(hexlify(new_block.hash).decode()))
proof = TX(binary=data['proof'])
new_block.txs.append(proof)
new_block.flag = data['block_flag']
proof.signature = data['sign']
# Check the block is correct info
if not new_block.pow_check():
raise BlockChainError('Proof of work is not satisfied.')
my_block = builder.get_block(new_block.hash)
if my_block:
raise BlockChainError('Already inserted block {}'.format(my_block))
before_block = builder.get_block(new_block.previous_hash)
if before_block is None:
logging.debug("Cannot find beforeBlock {}, try to ask outside node."
.format(hexlify(new_block.previous_hash).decode()))
# not found beforeBlock, need to check other node have the the block
new_block.inner_score *= 0.70 # unknown previousBlock, score down
before_block = make_block_by_node(blockhash=new_block.previous_hash)
if not new_insert_block(before_block, time_check=True):
# require time_check, it was generated only a few seconds ago
# print([block for block in builder.chain.values()])
raise BlockChainError('Failed insert beforeBlock {}'.format(before_block))
new_height = before_block.height + 1
proof.height = new_height
new_block.height = new_height
# Append general txs
for txhash in data['txs'][1:]:
tx = tx_builder.get_tx(txhash)
if tx is None:
new_block.inner_score *= 0.75 # unknown tx, score down
logging.debug("Unknown tx, try to download.")
r = ask_node(cmd=DirectCmd.TX_BY_HASH, data={'txhash': txhash}, f_continue_asking=True)
if isinstance(r, str):
raise BlockChainError('Failed unknown tx download "{}"'.format(r))
tx = TX(binary=r['tx'])
tx.signature = r['sign']
check_tx(tx, include_block=None)
tx_builder.put_unconfirmed(tx)
logging.debug("Success unknown tx download {}".format(tx))
tx.height = new_height
new_block.txs.append(tx)
return new_block
def create_mining_block(consensus):
global mining_address
# setup mining address for PoW
with mining_address_lock:
if mining_address is None:
if V.MINING_ADDRESS is None:
with create_db(V.DB_ACCOUNT_PATH) as db:
cur = db.cursor()
mining_address = generate_new_address_by_userid(
C.ANT_UNKNOWN, cur)
db.commit()
else:
mining_address = V.MINING_ADDRESS
if unconfirmed_txs is None:
raise FailedGenerateWarning('unconfirmed_txs is None')
if previous_block is None:
raise FailedGenerateWarning('previous_block is None')
# create proof_tx
reward = GompertzCurve.calc_block_reward(previous_block.height + 1)
fees = sum(tx.gas_amount * tx.gas_price for tx in unconfirmed_txs)
proof_tx = TX.from_dict(
tx={
'type': C.TX_POW_REWARD,
'inputs': list(),
'outputs': [(mining_address, 0, reward + fees)],
'gas_price': 0,
'gas_amount': 0,
'message_type': C.MSG_NONE,
'message': b''
})
proof_tx.update_time()
# create mining block
bits, target = get_bits_by_hash(previous_hash=previous_block.hash,
consensus=consensus)
mining_block = Block.from_dict(
block={
'merkleroot': b'\xff' * 32,
'time': 0,
'previous_hash': previous_block.hash,
'bits': bits,
'nonce': b'\xff\xff\xff\xff'
})
proof_tx.height = previous_block.height + 1
mining_block.height = proof_tx.height
mining_block.flag = consensus
mining_block.bits2target()
mining_block.txs.append(proof_tx)
if unconfirmed_txs is None:
raise FailedGenerateWarning('unconfirmed_txs is None')
mining_block.txs.extend(unconfirmed_txs)
mining_block.update_merkleroot()
mining_block.update_time(proof_tx.time)
return mining_block
def read_block(self, blockhash):
if self.is_batch_thread() and blockhash in self.batch['_block']:
b = self.batch['_block'][blockhash]
elif is_plyvel:
b = self._block.get(blockhash, default=None)
else:
b = self._block.Get(blockhash, default=None)
if b is None:
return None
b = bytes(b)
height, _time, work, b_block, flag, tx_len = struct_block.unpack_from(
b)
idx = struct_block.size
assert len(b) == idx + tx_len, 'Not correct size. [{}={}]'.format(
len(b), idx + tx_len)
block = Block(binary=b_block)
block.height = height
block.work_hash = work
block.flag = flag
# block.txs = [self.read_tx(b[idx+32*i:idx+32*i+32]) for i in range(tx_len//32)]
block.txs = [
tx_builder.get_tx(b[idx + 32 * i:idx + 32 * i + 32])
for i in range(tx_len // 32)
]
return block
async def getwork(*args, **kwargs):
"""
https://en.bitcoin.it/wiki/Getwork
Result:
1. "data" (hex string, required) block data
2. "target" (hex string, required) little endian hash target
"""
if len(args) == 0:
now = int(time() - V.BLOCK_GENESIS_TIME)
for block in getwork_cashe.values():
if block.previous_hash != chain_builder.best_block.hash:
continue
if now - block.time < 10:
mining_block = block
break
else:
mining_block = await get_mining_block(int(kwargs['password']))
getwork_cashe[mining_block.merkleroot] = mining_block
mining_block.bits2target()
# Pre-processed SHA-2 input chunks
data = mining_block.b # 80 bytes
data += a2b_hex('800000000000000000000000000000000000000000000000'
'000000000000000000000000000000000000000000000280') # 48+80=128bytes
new_data = b''
for i in range(0, 128, 4):
new_data += data[i:i + 4][::-1]
if extra_target:
return {"data": new_data.hex(), "target": extra_target.to_bytes(32, 'big').hex()}
else:
return {"data": new_data.hex(), "target": mining_block.target_hash.hex()}
else:
data = a2b_hex(args[0])
new_data = b''
for i in range(0, 128, 4):
new_data += data[i:i + 4][::-1]
block = Block.from_binary(binary=new_data[:80])
if block.previous_hash != chain_builder.best_block.hash:
return 'PreviousHash don\'t match'
if block.merkleroot in getwork_cashe:
block.txs.extend(getwork_cashe[block.merkleroot].txs)
result = await submitblock(block, **kwargs)
if result is None:
return True
elif extra_target and block.pow_check(extra_target=extra_target):
return True
else:
log.debug("GetWorkReject by \"{}\"".format(result))
return result
else:
log.debug("GetWorkReject by \"Not found merkleroot.\"")
return 'Not found merkleroot'
def fill_newblock_info(data):
new_block = Block(binary=data['block'])
proof = TX(binary=data['proof'])
new_block.txs.append(proof)
new_block.flag = data['block_flag']
proof.signature = data['sign']
# Check the block is correct info
if not new_block.pow_check():
raise BlockChainError('Proof of work is not satisfied.')
if builder.get_block(new_block.hash):
raise BlockChainError('Already inserted block.')
before_block = builder.get_block(new_block.previous_hash)
if before_block is None:
raise BlockChainError('Not found beforeBlock {}.'.format(
hexlify(new_block.previous_hash).decode()))
new_height = before_block.height + 1
proof.height = new_height
new_block.height = new_height
# Append general txs
for txhash in data['txs'][1:]:
tx = tx_builder.get_tx(txhash)
if tx is None:
new_block.inner_score *= 0.75 # unknown tx, score down
logging.debug("Unknown tx, try to download.")
r = ask_node(cmd=DirectCmd.TX_BY_HASH,
data={'txhash': txhash},
f_continue_asking=True)
if isinstance(r, str):
raise BlockChainError(
'Failed unknown tx download "{}"'.format(r))
tx = TX(binary=r['tx'])
tx.signature = r['sign']
check_tx(tx, include_block=None)
tx_builder.put_unconfirmed(tx)
logging.debug("Success unknown tx download {}".format(tx))
tx.height = new_height
new_block.txs.append(tx)
return new_block
def check_unconfirmed_order(best_block, ordered_unconfirmed_txs):
if len(ordered_unconfirmed_txs) == 0:
return None
s = time()
dummy_proof_tx = TX()
dummy_proof_tx.type = C.TX_POW_REWARD,
dummy_block = Block()
dummy_block.height = best_block.height + 1
dummy_block.previous_hash = best_block.hash
dummy_block.txs.append(dummy_proof_tx) # dummy for proof tx
dummy_block.txs.extend(ordered_unconfirmed_txs)
tx = None
try:
for tx in ordered_unconfirmed_txs:
if tx.type == C.TX_GENESIS:
pass
elif tx.type == C.TX_POS_REWARD:
pass
elif tx.type == C.TX_POW_REWARD:
pass
elif tx.type == C.TX_TRANSFER:
pass
elif tx.type == C.TX_MINT_COIN:
check_tx_mint_coin(tx=tx, include_block=dummy_block)
elif tx.type == C.TX_VALIDATOR_EDIT:
check_tx_validator_edit(tx=tx, include_block=dummy_block)
elif tx.type == C.TX_CONCLUDE_CONTRACT:
check_tx_contract_conclude(tx=tx, include_block=dummy_block)
else:
raise BlockChainError('Unknown tx type "{}"'.format(tx.type))
else:
log.debug('Finish unconfirmed order check {}mSec'.format(
int((time() - s) * 1000)))
return None
except Exception as e:
log.warning(e, exc_info=True)
# return errored tx
return tx
def get_submit_data(job: Job, extranonce1: bytes, extranonce2: bytes, nonce: bytes, difficulty: float) \
-> (Optional[bytes], bytes, bool, bool):
"""check client submit data and generate node submit data"""
assert len(extranonce1) == 4 and len(extranonce2) == 4
coinbase = job.coinbase1 + extranonce1 + extranonce2 + job.coinbase2
coinbase_hash = sha256d_hash(coinbase)
merkleroot_list = [coinbase_hash] + [tx[0] for tx in job.unconfirmed]
merkleroot = merkleroot_hash(merkleroot_list)
block = Block.from_dict({
'version': job.version,
'previous_hash': job.previous_hash,
'merkleroot': merkleroot,
'time': job.ntime,
'bits': int.from_bytes(job.bits, 'big'),
'nonce': nonce,
# meta
'height': job.height,
'flag': job.algorithm,
})
# check fulfill target or share
update_work_hash(block)
f_mined = block.pow_check()
f_shared = block.pow_check(int(DEFAULT_TARGET / difficulty))
log.debug(f"block -> {block.height} {block.hash.hex()}")
log.debug(f"coinbase -> {coinbase.hex()}")
log.debug(f"header -> {block.b.hex()}")
log.debug(f"merkleroot -> {len(merkleroot_list)} {merkleroot.hex()}")
log.debug(
f"workhash -> {block.work_hash.hex()} mined:{f_mined} shared:{f_shared}"
)
# generate submit data when mined
if f_mined:
submit_data = block.b
tx_len = len(job.unconfirmed) + 1
if tx_len < 0xfd:
submit_data += tx_len.to_bytes(1, 'little')
elif tx_len <= 0xffff:
submit_data += b'\xfd' + tx_len.to_bytes(2, 'little')
elif tx_len <= 0xffffffff:
submit_data += b'\xfe' + tx_len.to_bytes(4, 'little')
elif tx_len <= 0xffffffffffffffff: # == 0xff
submit_data += b'\xff' + tx_len.to_bytes(8, 'little')
else:
raise Exception(f"overflowed tx length {tx_len}")
submit_data += coinbase
for tx in job.unconfirmed:
submit_data += tx[1]
else:
submit_data = None
return submit_data, block, f_mined, f_shared
def create_mining_block(consensus):
global mining_address
# create proof_tx
mining_address = mining_address or V.MINING_ADDRESS or new_key()
reward = GompertzCurve.calc_block_reward(previous_block.height + 1)
fees = sum(tx.gas_amount * tx.gas_price for tx in unconfirmed_txs)
proof_tx = TX(
tx={
'type': C.TX_POW_REWARD,
'inputs': list(),
'outputs': [(mining_address, 0, reward + fees)],
'gas_price': 0,
'gas_amount': 0,
'message_type': C.MSG_PLAIN if V.MINING_MESSAGE else C.MSG_NONE,
'message': V.MINING_MESSAGE if V.MINING_MESSAGE else b''
})
proof_tx.update_time()
# create mining block
bits, target = get_bits_by_hash(previous_hash=previous_block.hash,
consensus=consensus)
mining_block = Block(
block={
'merkleroot': b'\xff' * 32,
'time': 0,
'previous_hash': previous_block.hash,
'bits': bits,
'nonce': b'\xff\xff\xff\xff'
})
proof_tx.height = previous_block.height + 1
mining_block.height = proof_tx.height
mining_block.flag = consensus
mining_block.bits2target()
mining_block.txs.append(proof_tx)
mining_block.txs.extend(unconfirmed_txs)
mining_block.update_merkleroot()
mining_block.update_time(proof_tx.time)
return mining_block
def fill_newblock_info(data):
new_block: Block = Block.from_binary(binary=data['binary'])
log.debug("fill newblock height={} newblock={}".format(
data.get('height'), new_block.hash.hex()))
proof: TX = data['proof']
new_block.txs.append(proof)
new_block.flag = data['block_flag']
my_block = chain_builder.get_block(new_block.hash)
if my_block:
raise BlockChainError('Already inserted block {}'.format(my_block))
before_block = chain_builder.get_block(new_block.previous_hash)
if before_block is None:
log.debug("Cannot find beforeBlock, try to ask outside node")
# not found beforeBlock, need to check other node have the the block
new_block.inner_score *= 0.70 # unknown previousBlock, score down
before_block = make_block_by_node(blockhash=new_block.previous_hash,
depth=0)
new_height = before_block.height + 1
proof.height = new_height
new_block.height = new_height
# work check
# TODO: correct position?
if not new_block.pow_check():
raise BlockChainError('Proof of work is not satisfied')
# Append general txs
for txhash in data['txs'][1:]:
tx = tx_builder.get_tx(txhash)
if tx is None:
new_block.inner_score *= 0.75 # unknown tx, score down
log.debug("Unknown tx, try to download")
r = ask_node(cmd=DirectCmd.TX_BY_HASH,
data={'txhash': txhash},
f_continue_asking=True)
if isinstance(r, str):
raise BlockChainError(
'Failed unknown tx download "{}"'.format(r))
tx: TX = r
tx.height = None
check_tx(tx, include_block=None)
tx_builder.put_unconfirmed(tx)
log.debug("Success unknown tx download {}".format(tx))
tx.height = new_height
new_block.txs.append(tx)
return new_block
def load_boot_file(url=None):
normal_path = os.path.join(os.path.abspath(os.path.dirname(__file__)),
'boot.json')
extra_path = os.path.join(V.DB_HOME_DIR, 'boot.json')
if url:
data = requests.get(url=url).json()
elif os.path.exists(normal_path):
with open(normal_path, mode='r') as fp:
data = json.load(fp)
elif os.path.exists(extra_path):
with open(extra_path, mode='r') as fp:
data = json.load(fp)
else:
raise FileNotFoundError('Cannot find boot.json "{}" or "{}" ?'.format(
normal_path, extra_path))
# load from exist boot.json
genesis_block = Block.from_binary(binary=a2b_hex(data['genesis_binary']))
assert genesis_block.hash == a2b_hex(data['genesis_hash'])
genesis_block.flag = C.BLOCK_GENESIS
genesis_block.height = 0
for tx_dct in data['txs']:
tx = TX.from_binary(binary=a2b_hex(tx_dct['binary']))
assert tx.hash == a2b_hex(tx_dct['hash'])
tx.height = 0
genesis_block.txs.append(tx)
connections = data['connections']
network_ver = data['network_ver']
if isinstance(data['params'], dict):
# new type boot.json
params = data['params']
params['consensus'] = {
int(k): v
for k, v in params['consensus'].items()
}
elif isinstance(data['params'], str):
# old type boot.json
params = original_mpk.unpackb(a2b_hex(data['params']),
raw=True,
encoding='utf8')
else:
raise Exception('Unknown type params')
return genesis_block, params, network_ver, connections
def object_hook(dct):
if isinstance(dct, dict) and '_bc4py_class_' in dct:
if dct['_bc4py_class_'] == 'Block':
block = Block.from_binary(binary=dct['binary'])
block.height = dct['height']
block.flag = dct['flag']
block.txs.extend(object_hook(tx) for tx in dct['txs'])
for tx in block.txs:
tx.height = block.height
return block
elif dct['_bc4py_class_'] == 'TX':
tx = TX.from_binary(binary=dct['binary'])
tx.height = dct['height']
tx.signature.extend(tuple(sig) for sig in dct['signature'])
tx.R = dct['R']
return tx
else:
raise Exception('Not found class name "{}"'.format(
dct['_bc4py_class_']))
else:
return dct
def init(self, genesis_block: Block, batch_size=None):
assert self.db, 'Why database connection failed?'
if batch_size is None:
batch_size = self.cashe_limit
# GenesisBlockか確認
t = time.time()
try:
if genesis_block.hash != self.db.read_block_hash(0):
raise BlockBuilderError("Don't match genesis hash [{}!={}]".format(
hexlify(genesis_block.hash).decode(), hexlify(self.db.read_block_hash(0).decode())))
elif genesis_block != self.db.read_block(genesis_block.hash):
raise BlockBuilderError("Don't match genesis binary [{}!={}]".format(
hexlify(genesis_block.b).decode(), hexlify(self.db.read_block(genesis_block.hash).b).decode()))
except Exception:
# GenesisBlockしか無いのでDummyBlockを入れる処理
self.root_block = Block()
self.root_block.hash = b'\xff' * 32
self.chain[genesis_block.hash] = genesis_block
self.best_chain = [genesis_block]
self.best_block = genesis_block
logging.info("Set dummy block. GenesisBlock={}".format(genesis_block))
user_account.init()
return
# 0HeightよりBlockを取得して確認
before_block = genesis_block
batch_blocks = list()
for height, blockhash in self.db.read_block_hash_iter(start_height=1):
block = self.db.read_block(blockhash)
if block.previous_hash != before_block.hash:
raise BlockBuilderError("PreviousHash != BlockHash [{}!={}]"
.format(block, before_block))
elif block.height != height:
raise BlockBuilderError("BlockHeight != DBHeight [{}!={}]"
.format(block.height, height))
elif height != before_block.height+1:
raise BlockBuilderError("DBHeight != BeforeHeight+1 [{}!={}+1]"
.format(height, before_block.height))
for tx in block.txs:
if tx.height != height:
raise BlockBuilderError("TXHeight != BlockHeight [{}!{}]"
.format(tx.height, height))
# inputs
for txhash, txindex in tx.inputs:
input_tx = self.db.read_tx(txhash)
address, coin_id, amount = input_tx.outputs[txindex]
_coin_id, _amount, f_used = self.db.read_address_idx(address, txhash, txindex)
usedindex = self.db.read_usedindex(txhash)
if coin_id != _coin_id or amount != _amount:
raise BlockBuilderError("Inputs, coin_id != _coin_id or amount != _amount [{}!{}] [{}!={}]"
.format(coin_id, _coin_id, amount, _amount))
elif txindex not in usedindex:
raise BlockBuilderError("Already used but unused. [{} not in {}]".format(txindex, usedindex))
elif not f_used:
raise BlockBuilderError("Already used but unused flag. [{}:{}]".format(input_tx, txindex))
# outputs
for index, (address, coin_id, amount) in enumerate(tx.outputs):
_coin_id, _amount, f_used = self.db.read_address_idx(address, tx.hash, index)
if coin_id != _coin_id or amount != _amount:
raise BlockBuilderError("Outputs, coin_id != _coin_id or amount != _amount [{}!{}] [{}!={}]"
.format(coin_id, _coin_id, amount, _amount))
# Block確認終了
before_block = block
batch_blocks.append(block)
if len(batch_blocks) >= batch_size:
user_account.new_batch_apply(batch_blocks)
batch_blocks.clear()
logging.debug("UserAccount batched at {} height.".format(block.height))
# import from starter.dat
self.root_block = before_block
memorized_blocks, self.best_block = self.load_starter(before_block)
# Memory化されたChainを直接復元
for block in memorized_blocks:
batch_blocks.append(block)
self.chain[block.hash] = block
for tx in block.txs:
if tx.hash not in tx_builder.chained_tx:
tx_builder.chained_tx[tx.hash] = tx
if tx.hash in tx_builder.unconfirmed:
del tx_builder.unconfirmed[tx.hash]
self.best_chain = list(reversed(memorized_blocks))
# UserAccount update
user_account.new_batch_apply(batch_blocks)
user_account.init()
logging.info("Init finished, last block is {} {}Sec"
.format(before_block, round(time.time()-t, 3)))
def proof_of_stake(self):
global staking_limit
limit_deque = deque(maxlen=10)
while self.f_enable:
# check start mining
if previous_block is None or unconfirmed_txs is None or unspents_txs is None:
sleep(0.1)
continue
if len(unspents_txs) == 0:
log.info("No unspents for staking, wait 180s")
sleep(180)
continue
start = time()
# create staking block
bits, target = get_bits_by_hash(previous_hash=previous_block.hash,
consensus=C.BLOCK_COIN_POS)
reward = GompertzCurve.calc_block_reward(previous_block.height + 1)
staking_block = Block.from_dict(
block={
'version': 0, # always 0
'merkleroot': b'\xff' * 32,
'time': 0,
'previous_hash': previous_block.hash,
'bits': bits,
'nonce': b'\xff\xff\xff\xff'
})
staking_block.height = previous_block.height + 1
staking_block.flag = C.BLOCK_COIN_POS
staking_block.bits2target()
staking_block.txs.append(None) # Dummy proof tx
if unconfirmed_txs is None:
raise FailedGenerateWarning('unconfirmed_txs is None')
staking_block.txs.extend(unconfirmed_txs)
calculate_nam = 0
for proof_tx in unspents_txs.copy():
address = proof_tx.outputs[0][0]
proof_tx.outputs[0] = (address, 0,
proof_tx.pos_amount + reward)
proof_tx.update_time()
calculate_nam += 1
# next check block
if previous_block is None or unconfirmed_txs is None or unspents_txs is None:
log.debug("Reset by \"nothing params found\"")
sleep(1)
break
elif previous_block.hash != staking_block.previous_hash:
log.debug("Reset by \"Don't match previous_hash\"")
sleep(1)
break
elif not stake_coin_check(
tx=proof_tx,
previous_hash=previous_block.hash,
target_hash=staking_block.target_hash):
continue
else:
# Staked yay!!
proof_tx.height = staking_block.height
staking_block.txs[0] = proof_tx
# Fit block size
while staking_block.size > C.SIZE_BLOCK_LIMIT:
staking_block.txs.pop()
staking_block.update_time(proof_tx.time)
staking_block.update_merkleroot()
signature = sign_message_by_address(raw=staking_block.b,
address=address)
proof_tx.signature.append(signature)
confirmed_generating_block(staking_block)
break
else:
# check time
used = time() - start
remain = 1.0 - used
max_limit = max(50, int(calculate_nam / max(0.0001, used)))
limit_deque.append(int(max_limit * self.power_limit))
staking_limit = sum(limit_deque) // len(limit_deque)
if int(time()) % 90 == 0:
log.info("Staking... margin={}% limit={}".format(
round(remain * 100, 1), staking_limit))
self.hashrate = (calculate_nam, time())
sleep(max(0.0, remain + random() - 0.5))
log.info("Close signal")
async def submitblock(*args, **kwargs):
"""
Attempts to submit new block to network.
See https://en.bitcoin.it/wiki/BIP_0022 for full specification.
Arguments
1. "hexdata" (string, required) the hex-encoded block data to submit
2. "dummy" (optional) dummy value, for compatibility with BIP22. This value is ignored.
Result:
null if success
string if failed
"""
if len(args) == 0:
raise ValueError('no argument found')
block_hex_or_obj = args[0]
if isinstance(block_hex_or_obj, str):
block_bin = a2b_hex(block_hex_or_obj)
# Block
mined_block = Block.from_binary(binary=block_bin[:80])
if mined_block.previous_hash != chain_builder.best_block.hash:
return 'PreviousHash don\'t match'
previous_block = chain_builder.get_block(mined_block.previous_hash)
mined_block.height = previous_block.height + 1
mined_block.flag = int(kwargs['password'])
# tx length
storage_flag = int.from_bytes(block_bin[80:81], 'little')
if storage_flag < 0xfd:
tx_len = storage_flag
pos = 81
elif storage_flag == 0xfd:
tx_len = int.from_bytes(block_bin[81:83], 'little')
pos = 83
elif storage_flag == 0xfe:
tx_len = int.from_bytes(block_bin[81:85], 'little')
pos = 85
else: # == 0xff
tx_len = int.from_bytes(block_bin[81:89], 'little')
pos = 89
log.debug("RpcSubmit block: pos={}, tx_len={}".format(pos, tx_len))
# correct txs
while len(block_bin) > pos:
tx = TX()
tx.b = block_bin
tx.deserialize(first_pos=pos, f_raise=False)
if tx.version != __chain_version__:
return 'tx_ver do not match [{}!={}]'.format(tx.version, __chain_version__)
pos += len(tx.b)
mined_block.txs.append(tx_builder.get_tx(txhash=tx.hash, default=tx))
# check format
if tx_len != len(mined_block.txs):
return 'Do not match txlen [{}!={}]'.format(tx_len, len(mined_block.txs))
if pos != len(block_bin):
return 'Do not match pos [{}!={}]'.format(pos, len(block_bin))
elif isinstance(block_hex_or_obj, Block):
mined_block = block_hex_or_obj
previous_block = chain_builder.get_block(mined_block.previous_hash)
mined_block.height = previous_block.height + 1
mined_block.flag = int(kwargs['password'])
else:
return 'Unknown input? -> {}'.format(block_hex_or_obj)
mined_block.update_pow()
if mined_block.pow_check():
confirmed_generating_block(mined_block)
return None # accepted
else:
return 'not satisfied work'
def proof_of_capacity(self):
dir_path: str = self.config.get('path',
os.path.join(V.DB_HOME_DIR, 'plots'))
while self.f_enable:
# check start mining
if previous_block is None or unconfirmed_txs is None:
sleep(0.1)
continue
if not os.path.exists(dir_path):
sleep(30)
continue
s = time()
previous_hash = previous_block.hash
height = previous_block.height + 1
block_time = int(s - V.BLOCK_GENESIS_TIME)
bits, target = get_bits_by_hash(previous_hash=previous_hash,
consensus=C.BLOCK_CAP_POS)
reward = GompertzCurve.calc_block_reward(height)
# start staking by capacity
count = 0
for file_name in os.listdir(dir_path):
m = optimize_file_name_re.match(file_name)
if m is None:
continue
count += int(m.group(3)) - int(m.group(2))
if count < 1:
log.debug("not found plot file, wait 60 sec")
sleep(60)
continue
# let's seek files
nonce, work_hash, address = multi_seek(dir=dir_path,
previous_hash=previous_hash,
target=target.to_bytes(
32, 'little'),
time=block_time,
worker=os.cpu_count())
if work_hash is None:
# return failed => (None, None, err-msg)
if int(s) % 300 == 0:
log.debug("PoC mining info by \"{}\"".format(address))
else:
# return success => (nonce, workhash, address)
if previous_block is None or unconfirmed_txs is None:
continue
if previous_block.hash != previous_hash:
continue
# Staked by capacity yay!!
total_fee = sum(tx.gas_price * tx.gas_amount
for tx in unconfirmed_txs)
staked_block = Block.from_dict(
block={
'version': 0, # always 0
'previous_hash': previous_hash,
'merkleroot': b'\x00' * 32,
'time': 0,
'bits': bits,
'nonce': nonce,
'height': height,
'flag': C.BLOCK_CAP_POS
})
staked_proof_tx = TX.from_dict(
tx={
'type': C.TX_POS_REWARD,
'time': block_time,
'deadline': block_time + 10800,
'gas_price': 0,
'gas_amount': 0,
'outputs': [(address, 0, reward + total_fee)]
})
staked_block.txs.append(staked_proof_tx)
staked_block.txs.extend(unconfirmed_txs)
while staked_block.size > C.SIZE_BLOCK_LIMIT:
staked_block.txs.pop()
staked_block.update_time(staked_proof_tx.time)
staked_block.update_merkleroot()
staked_block.work_hash = work_hash
signature = sign_message_by_address(raw=staked_block.b,
address=address)
staked_proof_tx.signature.append(signature)
confirmed_generating_block(staked_block)
# finish all
used_time = time() - s
self.hashrate = (count, time())
sleep(max(1 - used_time, 0))
log.info("Close signal")
def proof_of_stake(self):
global staking_limit
limit_deque = deque(maxlen=10)
self.event_close.set()
while self.event_close.is_set():
# check start mining
if previous_block is None or unconfirmed_txs is None or unspents_txs is None:
sleep(0.1)
continue
if len(unspents_txs) == 0:
logging.info("No unspents for staking, wait 180s..")
sleep(180)
continue
start = time()
# create staking block
bits, target = get_bits_by_hash(previous_hash=previous_block.hash,
consensus=C.BLOCK_POS)
reward = GompertzCurve.calc_block_reward(previous_block.height + 1)
staking_block = Block(
block={
'merkleroot': b'\xff' * 32,
'time': 0,
'previous_hash': previous_block.hash,
'bits': bits,
'nonce': b'\xff\xff\xff\xff'
})
staking_block.height = previous_block.height + 1
staking_block.flag = C.BLOCK_POS
staking_block.bits2target()
staking_block.txs.append(None) # Dummy proof tx
staking_block.txs.extend(unconfirmed_txs)
calculate_nam = 0
for proof_tx in unspents_txs.copy():
address = proof_tx.outputs[0][0]
proof_tx.outputs[0] = (address, 0,
proof_tx.pos_amount + reward)
proof_tx.update_time()
calculate_nam += 1
# next check block
if previous_block is None or unconfirmed_txs is None or unspents_txs is None:
logging.debug("Reset by \"nothing params found\"")
sleep(1)
break
elif previous_block.hash != staking_block.previous_hash:
logging.debug("Reset by \"Don't match previous_hash\"")
sleep(1)
break
elif not proof_tx.pos_check(
previous_hash=previous_block.hash,
pos_target_hash=staking_block.target_hash):
continue
else:
# Staked yay!!
proof_tx.height = staking_block.height
proof_tx.signature = [
message2signature(proof_tx.b, proof_tx.outputs[0][0])
]
staking_block.txs[0] = proof_tx
# Fit block size
while staking_block.getsize() > C.SIZE_BLOCK_LIMIT:
tx = staking_block.txs.pop()
if tx.type == C.TX_FINISH_CONTRACT:
staking_block.txs.pop()
staking_block.update_time(proof_tx.time)
staking_block.update_merkleroot()
confirmed_generating_block(staking_block)
break
else:
# check time
used = time() - start
remain = 1.0 - used
max_limit = max(50, int(calculate_nam / max(0.0001, used)))
limit_deque.append(int(max_limit * self.power_limit))
staking_limit = sum(limit_deque) // len(limit_deque)
if int(time()) % 90 == 0:
logging.info("Staking... margin={}% limit={}".format(
round(remain * 100, 1), staking_limit))
self.hashrate = (calculate_nam, time())
sleep(max(0.0, remain))
logging.info("Close signal")
def create_genesis_block(mining_supply,
block_span,
hrp='pycon',
digit_number=8,
minimum_price=100,
consensus=None,
genesis_msg="blockchain for python",
premine=None):
"""
Height0のGenesisBlockを作成する
:param mining_supply: PoW/POS合わせた全採掘量、プリマインを除く
:param block_span: Blockの採掘間隔(Sec)
:param hrp: human readable part
:param digit_number: コインの分解能
:param minimum_price: 最小gas_price
:param consensus: 採掘アルゴ {consensus: ratio(0~100), ..}
:param genesis_msg: GenesisMessage
:param premine: プリマイン [(address, coin_id, amount), ...]
"""
# default: Yescript9割, Stake1割の分配
consensus = consensus or {C.BLOCK_X16S_POW: 100}
if sum(consensus.values()) != 100:
raise BlockChainError('sum of consensus values is 100 [!={}]'.format(sum(consensus.values())))
elif not isinstance(sum(consensus.values()), int):
raise BlockChainError('value is int only')
elif not (0 < min(consensus.values()) <= 100):
raise BlockChainError('out of range {}'.format(min(consensus.values())))
elif not (0 < max(consensus.values()) <= 100):
raise BlockChainError('out of range {}'.format(min(consensus.values())))
all_consensus = {
C.BLOCK_COIN_POS, C.BLOCK_CAP_POS, C.BLOCK_FLK_POS, C.BLOCK_YES_POW, C.BLOCK_X11_POW, C.BLOCK_HMQ_POW,
C.BLOCK_LTC_POW, C.BLOCK_X16S_POW
}
if len(set(consensus.keys()) - all_consensus) > 0:
raise BlockChainError('Not found all_consensus number {}'.format(set(consensus.keys()) - all_consensus))
elif len(set(consensus.keys()) & all_consensus) == 0:
raise BlockChainError('No usable consensus found {}'.format(set(consensus.keys()) & all_consensus))
elif not (0 < len(hrp) < 5):
raise BlockChainError('hrp is too long hrp={}'.format(hrp))
elif 'dummy' in hrp or '1' in hrp:
raise BlockChainError('Not allowed include "dummy" and "1" str {}'.format(hrp))
# params
assert isinstance(minimum_price, int), 'minimum_price is INT'
genesis_time = int(time())
# BLockChainの設定TX
params = {
'hrp': hrp,
'genesis_time': genesis_time, # GenesisBlockの採掘時間
'mining_supply': mining_supply, # 全採掘量
'block_span': block_span, # ブロックの採掘間隔
'digit_number': digit_number, # 小数点以下の桁数
'minimum_price': minimum_price,
'contract_minimum_amount': pow(10, digit_number),
'consensus': consensus, # Block承認のアルゴリズム
}
V.BLOCK_GENESIS_TIME = genesis_time
# first tx
first_tx = TX.from_dict(
tx={
'type': C.TX_GENESIS,
'time': 0,
'deadline': 10800,
'gas_price': 0,
'gas_amount': 0,
'message_type': C.MSG_PLAIN,
'message': genesis_msg.encode()
})
first_tx.height = 0
# premine
premine_txs = list()
for index, chunk in enumerate(chunked(premine or list(), 255)):
tx = TX.from_dict(tx={
'type': C.TX_TRANSFER,
'time': 0,
'deadline': 10800,
'outputs': chunk,
'gas_price': 0,
'gas_amount': 0
})
tx.height = 0
premine_txs.append(tx)
# height0のBlock生成
genesis_block = Block.from_dict(block={
'merkleroot': b'\x00' * 32,
'time': 0,
'previous_hash': b'\xff' * 32,
'bits': MAX_BITS,
'nonce': b'\xff' * 4
})
# block params
genesis_block.height = 0
genesis_block.flag = C.BLOCK_GENESIS
# block body
genesis_block.txs.append(first_tx)
genesis_block.txs.extend(premine_txs)
genesis_block.bits2target()
genesis_block.target2diff()
genesis_block.update_merkleroot()
genesis_block.serialize()
return genesis_block, params
def create_genesis_block(all_supply,
block_span,
prefix=b'\x98',
contract_prefix=b'\x12',
digit_number=8,
minimum_price=100,
consensus=None,
premine=None):
"""
Height0のGenesisBlockを作成する
:param all_supply: PoW/POS合わせた全採掘量、プリマインを除く
:param block_span: Blockの採掘間隔(Sec)
:param prefix: 一般アドレスの頭文字、b'\x98'=N
:param contract_prefix: コントラクトの頭文字、b'\x98'=C
:param digit_number: コインの分解能
:param minimum_price: 最小gas_price
:param consensus: 採掘アルゴ {consensus: ratio(0~100), ..}
:param premine: プリマイン [(address, coin_id, amount), ...]
"""
# default: Yescript9割, Stake1割の分配
consensus = consensus or {C.BLOCK_YES_POW: 90, C.BLOCK_POS: 10}
if sum(consensus.values()) != 100:
raise BlockChainError('sum of consensus values is 100 [!={}]'.format(
sum(consensus.values())))
elif not isinstance(sum(consensus.values()), int):
raise BlockChainError('value is int only.')
elif not (0 < min(consensus.values()) <= 100):
raise BlockChainError('out of range {}'.format(min(
consensus.values())))
elif not (0 < max(consensus.values()) <= 100):
raise BlockChainError('out of range {}'.format(min(
consensus.values())))
all_consensus = {
C.BLOCK_POS, C.BLOCK_YES_POW, C.BLOCK_X11_POW, C.BLOCK_HMQ_POW,
C.BLOCK_LTC_POW, C.BLOCK_X16_POW
}
if len(set(consensus.keys()) - all_consensus) > 0:
raise BlockChainError('Not found all_consensus number {}'.format(
set(consensus.keys()) - all_consensus))
elif len(set(consensus.keys()) & all_consensus) == 0:
raise BlockChainError('No usable consensus found {}'.format(
set(consensus.keys()) & all_consensus))
# params
assert isinstance(minimum_price, int), 'minimum_price is INT'
genesis_time = int(time.time())
# premine
premine_txs = list()
for index, chunk in enumerate(chunked(premine or list(), 256)):
tx = TX(
tx={
'version': __chain_version__,
'type': C.TX_TRANSFER,
'time': 0,
'deadline': 10800,
'inputs': list(),
'outputs': chunk,
'gas_price': 0,
'gas_amount': 0,
'message_type': C.MSG_PLAIN,
'message': 'Premine {}'.format(index).encode()
})
tx.height = 0
premine_txs.append(tx)
# validator
V.BLOCK_GENESIS_TIME = int(time.time())
with closing(create_db(V.DB_ACCOUNT_PATH)) as db:
ck = create_new_user_keypair(C.ANT_CONTRACT, db.cursor())
db.commit()
c_address = convert_address(ck, contract_prefix)
c_bin = contract2binary(Contract)
c_cs = {
ck.encode(): b'\x00\x00\x00\x00',
b'\x00' + b'\x00\x00\x00\x00': b'\x01'
} # TODO: 初期値どうする？
validator_tx = TX(
tx={
'version': __chain_version__,
'type': C.TX_CREATE_CONTRACT,
'time': 0,
'deadline': 10800,
'inputs': list(),
'outputs': list(),
'gas_price': 0,
'gas_amount': 0,
'message_type': C.MSG_BYTE,
'message': bjson.dumps((c_address, c_bin, c_cs), compress=False)
})
validator_tx.height = 0
params = {
'prefix': prefix, # CompressedKey prefix
'contract_prefix': contract_prefix, # ContractKey prefix
'validator_address': c_address,
'genesis_time': genesis_time, # GenesisBlockの採掘時間
'all_supply': all_supply, # 全採掘量
'block_span': block_span, # ブロックの採掘間隔
'digit_number': digit_number, # 小数点以下の桁数
'minimum_price': minimum_price,
'contract_minimum_amount': pow(10, digit_number),
'consensus': consensus
} # Block承認のアルゴリズム
# BLockChainの設定TX
setting_tx = TX(
tx={
'version': __chain_version__,
'type': C.TX_GENESIS,
'time': 0,
'deadline': 10800,
'inputs': list(),
'outputs': list(),
'gas_price': 0,
'gas_amount': 0,
'message_type': C.MSG_BYTE,
'message': bjson.dumps(params, compress=False)
})
setting_tx.height = 0
# height0のBlock生成
genesis_block = Block(
block={
'merkleroot': b'\x00' * 32,
'time': 0,
'previous_hash': b'\xff' * 32,
'bits': MAX_BITS,
'nonce': b'\xff' * 4
})
# block params
genesis_block.height = 0
genesis_block.flag = C.BLOCK_GENESIS
# block body
genesis_block.txs.append(setting_tx)
genesis_block.txs.append(validator_tx)
genesis_block.txs.extend(premine_txs)
genesis_block.bits2target()
genesis_block.target2diff()
genesis_block.update_merkleroot()
genesis_block.serialize()
return genesis_block
