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Sets limits for star/end time and to_self_delay for the alpha

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This commit is contained in:
Sergi Delgado Segura
2020-02-14 13:13:06 +01:00
parent de2036b19b
commit 4c9ddd0827
1 changed files with 26 additions and 3 deletions
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29
pisa/inspector.py
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@@ -19,6 +19,9 @@ common.cryptographer.logger = Logger(actor="Cryptographer", log_name_prefix=LOG_
# stored + blacklist if multiple wrong requests are received.
BLOCKS_IN_A_MONTH = 4320 # 4320 = roughly a month in blocks
class Inspector:
"""
The :class:`Inspector` class is in charge of verifying that the appointment data provided by the user is correct.
@@ -57,7 +60,10 @@ class Inspector:
appointment_data.get("end_time"), appointment_data.get("start_time"), block_height
)
if rcode == 0:
rcode, message = self.check_to_self_delay(appointment_data.get("to_self_delay"))
rcode, message = self.check_to_self_delay(
appointment_data.get("to_self_delay"),
appointment_data.get("end_time") - appointment_data.get("start_time"),
)
if rcode == 0:
rcode, message = self.check_blob(appointment_data.get("encrypted_blob"))
# if rcode == 0:
@@ -161,7 +167,14 @@ class Inspector:
if start_time < block_height:
message = "start_time is in the past"
else:
message = "start_time is too close to current height"
message = (
"start_time is too close to current height. "
"Accepted times are: [current_height+1, current_height+2]"
)
elif start_time > block_height + 6:
rcode = errors.APPOINTMENT_FIELD_TOO_BIG
message = "start_time is too far in the future. Accepted start times are up to 6 blocks in the future"
if message is not None:
logger.error(message)
@@ -206,6 +219,10 @@ class Inspector:
rcode = errors.APPOINTMENT_WRONG_FIELD_TYPE
message = "wrong end_time data type ({})".format(t)
elif end_time > block_height + BLOCKS_IN_A_MONTH: # 4320 = roughly a month in blocks
rcode = errors.APPOINTMENT_FIELD_TOO_BIG
message = "end_time should be within the next month (>= current_height + 4320)"
elif start_time >= end_time:
rcode = errors.APPOINTMENT_FIELD_TOO_SMALL
if start_time > end_time:
@@ -225,7 +242,7 @@ class Inspector:
return rcode, message
def check_to_self_delay(self, to_self_delay):
def check_to_self_delay(self, to_self_delay, start_end_diff):
"""
Checks if the provided ``to_self_delay`` is correct.
@@ -258,6 +275,12 @@ class Inspector:
rcode = errors.APPOINTMENT_WRONG_FIELD_TYPE
message = "wrong to_self_delay data type ({})".format(t)
elif to_self_delay > start_end_diff:
rcode = errors.APPOINTMENT_FIELD_TOO_BIG
message = "to_self_delay can't be bigger than the appointment time {} ({})".format(
start_end_diff, to_self_delay
)
elif to_self_delay < self.config.get("MIN_TO_SELF_DELAY"):
rcode = errors.APPOINTMENT_FIELD_TOO_SMALL
message = "to_self_delay too small. The to_self_delay should be at least {} (current: {})".format(