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rpc: make uptime monotonic across NTP jumps

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Compute `uptime` from `SteadyClock` so it is unaffected by system time changes after startup.

Derive GUI startup time by subtracting the monotonic uptime from the wall clock time.

Add a functional test covering a large `setmocktime` jump.

Co-authored-by: MarcoFalke <*~=`'#}+{/-|&$^_@721217.xyz>
This commit is contained in:
Lőrinc
2026-01-19 12:35:26 +01:00
parent a9440b1595
commit 14f99cfe53
5 changed files with 15 additions and 13 deletions
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9
test/functional/rpc_uptime.py
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@@ -26,9 +26,12 @@ class UptimeTest(BitcoinTestFramework):
assert_raises_rpc_error(-8, "Mocktime must be in the range [0, 9223372036], not -1.", self.nodes[0].setmocktime, -1)
def _test_uptime(self):
wait_time = 10
self.nodes[0].setmocktime(int(time.time() + wait_time))
assert self.nodes[0].uptime() >= wait_time
wait_time = 20_000
uptime_before = self.nodes[0].uptime()
self.nodes[0].setmocktime(int(time.time()) + wait_time)
uptime_after = self.nodes[0].uptime()
self.nodes[0].setmocktime(0)
assert uptime_after - uptime_before < wait_time, "uptime should not jump with wall clock"
if __name__ == '__main__':