Cast by zealynxsecurity
Mento's FX prices on Celo close from Friday 21:00 to Sunday 23:00 UTC. getFXRateIfValid() reverts in that window, but the older SortedOracles.medianRate() keeps answering with Friday's rate, 50 hours old last weekend. If your contract values COPm with medianRate, check medianTimestamp first.
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The full write-up, with what to pause and what to keep open over the weekend, and the 73-hour Christmas and New Year closures:
