From 3e906505361173dbac1dce516176c192ad7d921c Mon Sep 17 00:00:00 2001
From: nymkappa <vialjoris@hotmail.com>
Date: Tue, 3 May 2022 15:44:01 +0900
Subject: [PATCH] Add /api/v1/mining/blocks/sizes-weights/:interval API

---
 backend/src/api/mining.ts                    | 20 ++++++++
 backend/src/index.ts                         |  1 +
 backend/src/repositories/BlocksRepository.ts | 50 ++++++++++++++++++++
 backend/src/routes.ts                        | 18 +++++++
 4 files changed, 89 insertions(+)

diff --git a/backend/src/api/mining.ts b/backend/src/api/mining.ts
index 0909d6100..cbd412068 100644
--- a/backend/src/api/mining.ts
+++ b/backend/src/api/mining.ts
@@ -45,6 +45,26 @@ class Mining {
     );
   }
 
+  /**
+   * Get historical block sizes
+   */
+   public async $getHistoricalBlockSizes(interval: string | null = null): Promise<any> {
+    return await BlocksRepository.$getHistoricalBlockSizes(
+      this.getTimeRange(interval),
+      Common.getSqlInterval(interval)
+    );
+  }
+
+  /**
+   * Get historical block weights
+   */
+   public async $getHistoricalBlockWeights(interval: string | null = null): Promise<any> {
+    return await BlocksRepository.$getHistoricalBlockWeights(
+      this.getTimeRange(interval),
+      Common.getSqlInterval(interval)
+    );
+  }
+
   /**
    * Generate high level overview of the pool ranks and general stats
    */
diff --git a/backend/src/index.ts b/backend/src/index.ts
index 8004e1ec9..8560064a9 100644
--- a/backend/src/index.ts
+++ b/backend/src/index.ts
@@ -323,6 +323,7 @@ class Server {
         .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/fees/:interval', routes.$getHistoricalBlockFees)
         .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/rewards/:interval', routes.$getHistoricalBlockRewards)
         .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/fee-rates/:interval', routes.$getHistoricalBlockFeeRates)
+        .get(config.MEMPOOL.API_URL_PREFIX + 'mining/blocks/sizes-weights/:interval', routes.$getHistoricalBlockSizeAndWeight)
       ;
     }
 
diff --git a/backend/src/repositories/BlocksRepository.ts b/backend/src/repositories/BlocksRepository.ts
index e04080a9c..0792f130f 100644
--- a/backend/src/repositories/BlocksRepository.ts
+++ b/backend/src/repositories/BlocksRepository.ts
@@ -509,6 +509,56 @@ class BlocksRepository {
       throw e;
     }
   }
+
+  /**
+   * Get the historical averaged block sizes
+   */
+   public async $getHistoricalBlockSizes(div: number, interval: string | null): Promise<any> {
+    try {
+      let query = `SELECT
+        CAST(AVG(height) as INT) as avg_height,
+        CAST(AVG(UNIX_TIMESTAMP(blockTimestamp)) as INT) as timestamp,
+        CAST(AVG(size) as INT) as avg_size
+      FROM blocks`;
+
+      if (interval !== null) {
+        query += ` WHERE blockTimestamp BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
+      }
+
+      query += ` GROUP BY UNIX_TIMESTAMP(blockTimestamp) DIV ${div}`;
+
+      const [rows]: any = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot generate block size and weight history. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
+
+  /**
+   * Get the historical averaged block weights
+   */
+   public async $getHistoricalBlockWeights(div: number, interval: string | null): Promise<any> {
+    try {
+      let query = `SELECT
+        CAST(AVG(height) as INT) as avg_height,
+        CAST(AVG(UNIX_TIMESTAMP(blockTimestamp)) as INT) as timestamp,
+        CAST(AVG(weight) as INT) as avg_weight
+      FROM blocks`;
+
+      if (interval !== null) {
+        query += ` WHERE blockTimestamp BETWEEN DATE_SUB(NOW(), INTERVAL ${interval}) AND NOW()`;
+      }
+
+      query += ` GROUP BY UNIX_TIMESTAMP(blockTimestamp) DIV ${div}`;
+
+      const [rows]: any = await DB.query(query);
+      return rows;
+    } catch (e) {
+      logger.err('Cannot generate block size and weight history. Reason: ' + (e instanceof Error ? e.message : e));
+      throw e;
+    }
+  }
 }
 
 export default new BlocksRepository();
diff --git a/backend/src/routes.ts b/backend/src/routes.ts
index d27fab683..83b71d19e 100644
--- a/backend/src/routes.ts
+++ b/backend/src/routes.ts
@@ -682,6 +682,24 @@ class Routes {
     }
   }
 
+  public async $getHistoricalBlockSizeAndWeight(req: Request, res: Response) {
+    try {
+      const blockSizes = await mining.$getHistoricalBlockSizes(req.params.interval ?? null);
+      const blockWeights = await mining.$getHistoricalBlockWeights(req.params.interval ?? null);
+      const oldestIndexedBlockTimestamp = await BlocksRepository.$oldestBlockTimestamp();
+      res.header('Pragma', 'public');
+      res.header('Cache-control', 'public');
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 300).toUTCString());
+      res.json({
+        oldestIndexedBlockTimestamp: oldestIndexedBlockTimestamp,
+        sizes: blockSizes,
+        weigths: blockWeights
+      });
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
   public async getBlock(req: Request, res: Response) {
     try {
       const result = await bitcoinApi.$getBlock(req.params.hash);