def create(cls, fd, file_hash_op):
"""Create a new timestamp log
Writes the header appropriately.
"""
ctx = StreamSerializationContext(fd)
ctx.write_bytes(cls.HEADER_MAGIC)
file_hash_op.serialize(ctx)
return cls(fd, file_hash_op)
def create(cls, fd, file_hash_op):
"""Create a new timestamp log
Writes the header appropriately.
"""
ctx = StreamSerializationContext(fd)
ctx.write_bytes(cls.HEADER_MAGIC)
file_hash_op.serialize(ctx)
return cls(fd, file_hash_op)
def append(self, length, timestamp):
"""Add a new timestamp to the log"""
if len(timestamp.msg) != self.file_hash_op.DIGEST_LENGTH:
raise ValueError(
"Timestamp msg length does not match expected digest length; %d != %d"
% (len(timestamp.msg), self.file_hash_op.DIGEST_LENGTH))
with PacketWriter(self.fd) as packet_fd:
ctx = StreamSerializationContext(packet_fd)
ctx.write_varuint(length)
ctx.write_bytes(timestamp.msg)
timestamp.serialize(ctx)
def append(self, length, timestamp):
"""Add a new timestamp to the log"""
if len(timestamp.msg) != self.file_hash_op.DIGEST_LENGTH:
raise ValueError(
"Timestamp msg length does not match expected digest length; %d != %d"
% (len(timestamp.msg), self.file_hash_op.DIGEST_LENGTH)
)
with PacketWriter(self.fd) as packet_fd:
ctx = StreamSerializationContext(packet_fd)
ctx.write_varuint(length)
ctx.write_bytes(timestamp.msg)
timestamp.serialize(ctx)
