def __init__(self,
tree: MerkleTree,
dataDir: str,
serializer: MappingSerializer = None,
fileName: str = None,
ensureDurability: bool = True,
transactionLogStore: FileStore = None,
defaultFile=None):
"""
:param tree: an implementation of MerkleTree
:param dataDir: the directory where the transaction log is stored
:param serializer: an object that can serialize the data before hashing
it and storing it in the MerkleTree
:param fileName: the name of the transaction log file
:param defaultFile: file or dir to use for initialization of transaction log store
"""
assert not transactionLogStore or not defaultFile
self.defaultFile = defaultFile
self.dataDir = dataDir
self.tree = tree
self.leafSerializer = serializer or \
JsonSerializer() # type: MappingSerializer
self.hasher = TreeHasher()
self._transactionLog = None # type: FileStore
self._transactionLogName = fileName or "transactions"
self.ensureDurability = ensureDurability
self._customTransactionLogStore = transactionLogStore
self.start()
self.seqNo = 0
self.recoverTree()
def __init__(self,
tree: MerkleTree,
dataDir: str,
txn_serializer: MappingSerializer = None,
hash_serializer: MappingSerializer = None,
fileName: str = None,
ensureDurability: bool = True,
transactionLogStore: KeyValueStorage = None,
genesis_txn_initiator: GenesisTxnInitiator = None):
"""
:param tree: an implementation of MerkleTree
:param dataDir: the directory where the transaction log is stored
:param serializer: an object that can serialize the data before hashing
it and storing it in the MerkleTree
:param fileName: the name of the transaction log file
:param genesis_txn_initiator: file or dir to use for initialization of transaction log store
"""
self.genesis_txn_initiator = genesis_txn_initiator
self.dataDir = dataDir
self.tree = tree
self.txn_serializer = txn_serializer or ledger_txn_serializer # type: MappingSerializer
# type: MappingSerializer
self.hash_serializer = hash_serializer or ledger_hash_serializer
self.hasher = TreeHasher()
self._transactionLog = None # type: KeyValueStorage
self._transactionLogName = fileName or "transactions"
self.ensureDurability = ensureDurability
self._customTransactionLogStore = transactionLogStore
self.seqNo = 0
self.start()
self.recoverTree()
if self.genesis_txn_initiator and self.size == 0:
self.genesis_txn_initiator.init_ledger_from_genesis_txn(self)
def __init__(self, hasher=TreeHasher(), tree_size=0, hashes=(),
hashStore=None):
# These two queues should be written to two simple position-accessible
# arrays (files, database tables, etc.)
self.hashStore = hashStore or MemoryHashStore() # type: HashStore
self.__hasher = hasher
self._update(tree_size, hashes)
def hasher():
return TreeHasher()
def __init__(self, hasher=TreeHasher()):
self.hasher = hasher
