add precondition that ref epoch in the past

guarantees time computation doesn't underflow
onflow · Nov 11, 2023 · 224eca7 · 224eca7
1 parent 2b2b8a1
commit 224eca7
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/contracts/epochs/FlowEpoch.cdc b/contracts/epochs/FlowEpoch.cdc
@@ -375,6 +375,9 @@ pub contract FlowEpoch {
         }
 
         pub fun updateEpochTimingConfig(_ newConfig: EpochTimingConfig) {
+            pre {
+                FlowEpoch.currentEpochCounter >= newConfig.refCounter: "Reference epoch must be before next epoch"
+            }
             FlowEpoch.account.load<EpochTimingConfig>(from: /storage/flowEpochTimingConfig)
             FlowEpoch.account.save(newConfig, to: /storage/flowEpochTimingConfig)
         }