Merge pull request #3800 from mempool/simon/dont-wipe-mempool-cache

Don't wipe mempool cache in pools updater

backend/src/api/disk-cache.ts

@@ -21,6 +21,7 @@ class DiskCache {
   private static RBF_FILE_NAME = config.MEMPOOL.CACHE_DIR + '/rbfcache.json';
   private static CHUNK_FILES = 25;
   private isWritingCache = false;
+  private ignoreBlocksCache = false;
 
   private semaphore: { resume: (() => void)[], locks: number } = {
     resume: [],
@@ -218,8 +219,13 @@ class DiskCache {
       }
 
       await memPool.$setMempool(data.mempool);
+      if (!this.ignoreBlocksCache) {
         blocks.setBlocks(data.blocks);
         blocks.setBlockSummaries(data.blockSummaries || []);
+      } else {
+        logger.info('Re-saving cache with empty recent blocks data');
+        await this.$saveCacheToDisk(true);
+      }
     } catch (e) {
       logger.warn('Failed to parse mempoool and blocks cache. Skipping. Reason: ' + (e instanceof Error ? e.message : e));
     }
@@ -273,6 +279,10 @@ class DiskCache {
       }
     }
   }
+
+  public setIgnoreBlocksCache(): void {
+    this.ignoreBlocksCache = true;
+  }
 }
 
 export default new DiskCache();

backend/src/api/pools-parser.ts

@@ -41,7 +41,7 @@ class PoolsParser {
   public async migratePoolsJson(): Promise<void> {
     // We also need to wipe the backend cache to make sure we don't serve blocks with
     // the wrong mining pool (usually happen with unknown blocks)
-    diskCache.wipeCache();
+    diskCache.setIgnoreBlocksCache();
 
     await this.$insertUnknownPool();