optimize block audit scores db query

backend/src/api/audit.ts

@@ -133,45 +133,6 @@ class Audit {
       score
     };
   }
-
-  public async $getBlockAuditScores(fromHeight?: number, limit: number = 15): Promise<AuditScore[]> {
-    let currentHeight = fromHeight !== undefined ? fromHeight : await blocksRepository.$mostRecentBlockHeight();
-    const returnScores: AuditScore[] = [];
-
-    if (currentHeight < 0) {
-      return returnScores;
-    }
-
-    for (let i = 0; i < limit && currentHeight >= 0; i++) {
-      const block = blocks.getBlocks().find((b) => b.height === currentHeight);
-      if (block?.extras?.matchRate != null) {
-        returnScores.push({
-          hash: block.id,
-          matchRate: block.extras.matchRate
-        });
-      } else {
-        let currentHash;
-        if (!currentHash && Common.indexingEnabled()) {
-          const dbBlock = await blocksRepository.$getBlockByHeight(currentHeight);
-          if (dbBlock && dbBlock['id']) {
-            currentHash = dbBlock['id'];
-          }
-        }
-        if (!currentHash) {
-          currentHash = await bitcoinApi.$getBlockHash(currentHeight);
-        }
-        if (currentHash) {
-          const auditScore = await blocksAuditsRepository.$getBlockAuditScore(currentHash);
-          returnScores.push({
-            hash: currentHash,
-            matchRate: auditScore?.matchRate
-          });
-        }
-      }
-      currentHeight--;
-    }
-    return returnScores;
-  }
 }
 
 export default new Audit();

backend/src/api/mining/mining-routes.ts

@@ -283,9 +283,12 @@ class MiningRoutes {
 
   private async $getBlockAuditScores(req: Request, res: Response) {
     try {
-      const height = req.params.height === undefined ? undefined : parseInt(req.params.height, 10);
+      let height = req.params.height === undefined ? undefined : parseInt(req.params.height, 10);
+      if (height == null) {
+        height = await BlocksRepository.$mostRecentBlockHeight();
+      }
       res.setHeader('Expires', new Date(Date.now() + 1000 * 60).toUTCString());
-      res.json(await audits.$getBlockAuditScores(height, 15));
+      res.json(await BlocksAuditsRepository.$getBlockAuditScores(height, height - 15));
     } catch (e) {
       res.status(500).send(e instanceof Error ? e.message : e);
     }

backend/src/repositories/BlocksAuditsRepository.ts

@@ -93,6 +93,20 @@ class BlocksAuditRepositories {
       throw e;
     }
   }
+
+  public async $getBlockAuditScores(maxHeight: number, minHeight: number): Promise<AuditScore[]> {
+    try {
+      const [rows]: any[] = await DB.query(
+        `SELECT hash, match_rate as matchRate
+        FROM blocks_audits
+        WHERE blocks_audits.height BETWEEN ? AND ?
+      `, [minHeight, maxHeight]);
+      return rows;
+    } catch (e: any) {
+      logger.err(`Cannot fetch block audit from db. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
 }
 
 export default new BlocksAuditRepositories();

frontend/src/app/components/blocks-list/blocks-list.component.html

@@ -52,8 +52,7 @@
                   [ngStyle]="{'width': (100 - (auditScores[block.id] || 0)) + '%' }"></div>
                 <div class="progress-text">
                   <span *ngIf="auditScores[block.id] != null;">{{ auditScores[block.id] }}%</span>
-                  <span *ngIf="auditScores[block.id] === undefined" class="skeleton-loader"></span>
+                  <span *ngIf="auditScores[block.id] == null">~</span>
-                  <span *ngIf="auditScores[block.id] === null">~</span>
                 </div>
               </div>
             </a>