def validate(self):
"""블럭 검증
:return: 검증결과
"""
mk_hash = self.__calculate_merkle_tree_root_hash()
if self.height == 0 and len(self.confirmed_transaction_list) == 0:
# Genesis Block 은 검증하지 않습니다.
return True
if len(self.confirmed_transaction_list) > 0:
# 머클트리 검증은 Tx가 있을때에만 합니다.
if mk_hash != self.merkle_tree_root_hash:
raise BlockInValidError('Merkle Tree Root hash is not same')
if self.block_hash != self.__generate_hash():
raise BlockInValidError('block Hash is not same generate hash')
if self.time_stamp == 0:
raise BlockError('block time stamp is 0')
if len(self.prev_block_hash) == 0:
raise BlockError('Prev Block Hash not Exist')
# Transaction Validate
for tx in self.confirmed_transaction_list:
if tx.get_tx_hash() != Transaction.generate_transaction_hash(tx):
logging.debug("TX HASH : %s vs %s", tx.get_tx_hash(),
Transaction.generate_transaction_hash(tx))
raise TransactionInValidError('Transaction hash is not same')
return True
def validate(self, tx: Transaction):
try:
if Transaction.generate_transaction_hash(tx) != tx.tx_hash:
self.__logging_tx_validate("hash validate fail", tx)
return False
# tx = self.__tx_validator()
# Get Cert Verifier for signature verify
public_verifier = PublicVerifierContainer.get_public_verifier(tx.meta[Transaction.CHANNEL_KEY],
tx.public_key)
# Signature Validate
if public_verifier.verify_hash(tx.tx_hash, tx.signature):
return True
else:
self.__logging_tx_validate("signature validate fail", tx)
return False
except Exception as e:
self.__logging_tx_validate("signature validate fail", tx)
return False
def test_generate_and_validate_hash(self):
"""트랜잭션 생성시 만들어진 hash 와 검증시 비교하는 hash 가 동일한지 확인하는 테스트
:return:
"""
# GIVEN
tx = Transaction()
tx.init_meta("AAAAA", "BBBBB", "CCCCC", conf.LOOPCHAIN_DEFAULT_CHANNEL)
tx.put_meta("1234", "5678")
tx.put_meta("1", "5")
tx.put_meta("2", "5")
tx.put_meta("3", "5")
tx.put_meta("4", "5")
txhash1 = tx.put_data("TEST DATA DATA")
txtime = tx.get_timestamp()
tx2 = Transaction()
tx2.init_meta("AAAAA", "BBBBB", "CCCCC",
conf.LOOPCHAIN_DEFAULT_CHANNEL)
tx2.put_meta("1234", "5678")
tx2.put_meta("1", "5")
tx2.put_meta("2", "5")
tx2.put_meta("3", "5")
tx2.put_meta("4", "5")
txhash2 = tx2.put_data("TEST DATA DATA", txtime)
# WHEN
txhash1_1 = Transaction.generate_transaction_hash(tx)
# THEN
logging.debug("txhash1: " + str(txhash1))
logging.debug("txhash1_1: " + str(txhash1_1))
logging.debug("txhash2: " + str(txhash2))
self.assertEqual(txhash1, txhash2)
self.assertEqual(txhash1, txhash1_1)
self.assertEqual(txhash2, txhash1_1)
def put_transaction(self, tx):
"""Block Generator 에서만 사용한다.
tx는 단수 혹은 여러개 일 수 있다
:param tx: transaction (transaction을 담고 있는 list도 처리 가능)
:return: True: 성공적으로 담겼을 때.
"""
if type(tx) is list:
result = True
for t in tx:
result &= self.put_transaction(t)
return result
elif not isinstance(tx, Transaction):
logging.error("트랜잭션 타입이 아님 %s", type(tx))
return False
# TX 검증은 현재 받아들인 TX의 Hash값(Peer 생성)과
# block generator (leader) 에서 만든 Hash 값이 일치하는지 확인 후 block 에 추가합니다.
# TX 는 최초 생성한 Peer 에서 block 에 담겨오는지 여부를 확인 할 때까지 보관해야 합니다. (TODO)
if tx.status == TransactionStatus.unconfirmed:
# transaction 검증
# logging.debug("Transaction Hash %s", tx.get_tx_hash())
if Transaction.generate_transaction_hash(tx) != tx.get_tx_hash():
# 검증실패
logging.error("검증 실패 \ntx hash : " + tx.get_tx_hash() +
"\ntx meta : " + str(tx.get_meta()) +
"\ntx data : " + str(tx.get_data()))
return False
else:
tx.status = TransactionStatus.confirmed
# Block 에 검증된 Transaction 추가 : 목록에 존재하는지 확인 필요
if tx not in self.confirmed_transaction_list:
self.confirmed_transaction_list.append(tx)
return True
