Use effective fee rate heuristics for block fee span

backend/src/repositories/BlocksRepository.ts

@@ -1,4 +1,4 @@
-import { BlockExtended, BlockExtension, BlockPrice } from '../mempool.interfaces';
+import { BlockExtended, BlockExtension, BlockPrice, EffectiveFeeStats } from '../mempool.interfaces';
 import DB from '../database';
 import logger from '../logger';
 import { Common } from '../api/common';
@@ -908,6 +908,25 @@ class BlocksRepository {
     }
   }
 
+  /**
+   * Save indexed effective fee statistics
+   * 
+   * @param id 
+   * @param feeStats 
+   */
+  public async $saveEffectiveFeeStats(id: string, feeStats: EffectiveFeeStats): Promise<void> {
+    try {
+      await DB.query(`
+        UPDATE blocks SET median_fee = ?, fee_span = ?
+        WHERE hash = ?`,
+        [feeStats.medianFee, JSON.stringify(feeStats.feeRange), id]
+      );
+    } catch (e) {
+      logger.err(`Cannot update block fee stats. Reason: ` + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
   /**
    * Convert a mysql row block into a BlockExtended. Note that you
    * must provide the correct field into dbBlk object param