112 lines
4.8 KiB
Python
112 lines
4.8 KiB
Python
"""
|
|
bal.core.checkalive
|
|
===================
|
|
|
|
The "Check Alive" policy: the single reference timestamp (``date_to_check``)
|
|
against which every will-validity check is evaluated, and the BASIC/ADVANCED
|
|
mode rules that decide it.
|
|
|
|
Pure, GUI-free. The GUI raises :class:`CheckAliveError` to trigger the
|
|
postpone/invalidate flow; the decision that it *should* be raised lives here.
|
|
"""
|
|
|
|
from datetime import datetime
|
|
from typing import Any
|
|
|
|
from .plugin_base import BalTimestamp
|
|
|
|
|
|
class CheckAliveError(Exception):
|
|
"""Raised when the "check alive" date is in the past."""
|
|
|
|
def __init__(self, timestamp_to_check):
|
|
self.timestamp_to_check = timestamp_to_check
|
|
|
|
def __str__(self):
|
|
return "Check alive expired please update it: {}".format(
|
|
datetime.fromtimestamp(self.timestamp_to_check).isoformat()
|
|
)
|
|
|
|
|
|
def resolve_date_to_check(
|
|
is_basic_mode: bool,
|
|
will_settings: Any,
|
|
now: float | None = None,
|
|
built_locktime: float | int | None = None,
|
|
) -> float:
|
|
"""Return the reference timestamp for every will-validity check.
|
|
|
|
``date_to_check`` is the single reference timestamp that EVERY downstream
|
|
check reads: the build filter, the heir count, ``check_will_expired``,
|
|
``check_amounts`` and the locktime-vs-threshold guard.
|
|
|
|
* BASIC mode: the Check Alive is hidden and NOT editable, so it must never
|
|
govern those checks. ``date_to_check`` is set to *now*: every check is
|
|
evaluated against the current moment (the Check Alive effectively does not
|
|
exist) while the delivery locktime is still fully enforced.
|
|
* ADVANCED mode: the user-controlled stored threshold is used as-is. An
|
|
ABSOLUTE threshold is returned unchanged; a RELATIVE one (``"30d"``/``"1y"``)
|
|
means "N days BEFORE the delivery date" and is resolved against the stored
|
|
locktime (matching the date the settings widget displays), so it stays in
|
|
lockstep with the built transactions instead of drifting with the clock.
|
|
|
|
A RELATIVE stored locktime is resolved against the frozen delivery date of
|
|
the built will (``built_locktime``, the locktime inside the signed tx) when
|
|
one exists: the will's real delivery date is authoritative, and resolving
|
|
the relative locktime from *now* would drift ``date_to_check`` past the
|
|
frozen tx locktime so an unchanged will wrongly reads as expired (asking to
|
|
invalidate) every day. Without a built will the legacy forward-from-now
|
|
resolution is kept.
|
|
|
|
Args:
|
|
is_basic_mode: ``True`` for the SIMPLE / BASIC user type.
|
|
will_settings: the per-wallet settings dict (``"threshold"`` and
|
|
``"locktime"`` keys).
|
|
now: overridable clock for tests; defaults to ``datetime.now()``.
|
|
built_locktime: the absolute locktime frozen inside the built will's
|
|
transactions (``None`` when there is no built will yet).
|
|
|
|
Returns:
|
|
The reference timestamp (float, UNIX seconds).
|
|
"""
|
|
if is_basic_mode:
|
|
return (now if now is not None else datetime.now().timestamp())
|
|
|
|
threshold = BalTimestamp(will_settings["threshold"])
|
|
# A RELATIVE threshold ("30d"/"1y") means "N days BEFORE the delivery":
|
|
# the settings widget resolves it as real_threshold = locktime - N days.
|
|
# Resolving it FORWARD from now (BalTimestamp.to_timestamp) turns
|
|
# date_to_check into a moving target that disagrees with the fixed
|
|
# locktime of the built transactions (and with the date shown in the UI),
|
|
# which can wrongly mark the will as expired/postponed. Resolve it
|
|
# against the delivery date instead.
|
|
if threshold.unit is not None:
|
|
locktime_raw = will_settings.get("locktime")
|
|
if locktime_raw is None:
|
|
# No delivery reference to anchor to: fall back to the legacy
|
|
# forward-from-now resolution.
|
|
return threshold.to_timestamp()
|
|
locktime_dt = BalTimestamp(locktime_raw).to_date(now)
|
|
# A RELATIVE stored locktime ("2y") is itself a moving target; when a
|
|
# will has already been built, its frozen delivery date (the tx
|
|
# locktime) is the authoritative anchor (see docstring).
|
|
if BalTimestamp(locktime_raw).unit is not None and built_locktime:
|
|
locktime_dt = BalTimestamp(int(built_locktime)).to_date(now)
|
|
return threshold.to_date(locktime_dt, reverse=True).timestamp()
|
|
return threshold.to_timestamp()
|
|
|
|
|
|
def check_alive_expired(
|
|
is_basic_mode: bool, date_to_check: float, now: float | None = None
|
|
) -> bool:
|
|
"""True when the Check Alive guard should fire (``CheckAliveError``).
|
|
|
|
Only ADVANCED mode can be "expired": in BASIC mode the Check Alive is inert
|
|
by construction, so a passed check-alive date must never force a postpone or
|
|
rewrite of the will.
|
|
"""
|
|
if is_basic_mode:
|
|
return False
|
|
current = now if now is not None else datetime.now().timestamp()
|
|
return date_to_check < current
|