chore: add log msg on highest block check (#281)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "celo-oracle",
-  "version": "2.0.16-beta",
+  "version": "2.0.17-beta",
   "description": "Oracle application to aggregate and report exchange rates to the Celo network",
   "author": "Celo",
   "license": "Apache-2.0",

src/reporters/block_based_reporter.ts

@@ -253,12 +253,15 @@ export class BlockBasedReporter extends BaseReporter {
 
   performBlockHeaderChecks(blockHeader: BlockHeader) {
     // Ensure this is the highest block number we've seen
-    // Temporary disable this check as it seems to cause issues after the L2 upgrade, likely because of the faster block times
-    // if (this.highestObservedBlockNumber && blockHeader.number <= this.highestObservedBlockNumber) {
-    //   throw Error(
-    //     `Block number is lower than the highest previously observed block: ${blockHeader.number} <= ${this.highestObservedBlockNumber}`
-    //   )
-    // }
+    if (this.highestObservedBlockNumber && blockHeader.number <= this.highestObservedBlockNumber) {
+      // Temporary disable this throw as it seems to cause issues after the L2 upgrade, likely because of the faster block times
+      // throw Error(
+      //   `Block number is lower than the highest previously observed block: ${blockHeader.number} <= ${this.highestObservedBlockNumber}`
+      // )
+      this.logger.warn(
+        `New Block number (${blockHeader.number}) is lower than the highest previously observed block (${this.highestObservedBlockNumber})`
+      )
+    }
     const now = Date.now()
     // now is in ms, and blockHeader.timestamp is in seconds, so we convert it to ms
     const blockTimestampMs = secondsToMs(blockHeader.timestamp as number)