From 6548aa418ca98583c38ab46d2c187090fc0e438f Mon Sep 17 00:00:00 2001
From: RetricSu <inneverland2013@gmail.com>
Date: Tue, 12 Jul 2022 11:37:54 +0800
Subject: [PATCH] chore: tune latest median tx to 50

---
 packages/api-server/src/db/constant.ts | 2 ++
 packages/api-server/src/db/query.ts    | 5 +++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/packages/api-server/src/db/constant.ts b/packages/api-server/src/db/constant.ts
index 26b295c3..07b4b580 100644
--- a/packages/api-server/src/db/constant.ts
+++ b/packages/api-server/src/db/constant.ts
@@ -1,3 +1,5 @@
 export const DEFAULT_MAX_QUERY_NUMBER = 10000;
 export const DEFAULT_MAX_QUERY_TIME_MILSECS = 1000 * 10; // 10 seconds
 export const DEFAULT_MAX_QUERY_ROUNDS = 100;
+
+export const LATEST_MEDIAN_GAS_PRICE = 50;
diff --git a/packages/api-server/src/db/query.ts b/packages/api-server/src/db/query.ts
index 16740118..52334734 100644
--- a/packages/api-server/src/db/query.ts
+++ b/packages/api-server/src/db/query.ts
@@ -10,6 +10,7 @@ import {
 import Knex, { Knex as KnexType } from "knex";
 import { LogQueryOption } from "./types";
 import { envConfig } from "../base/env-config";
+import { LATEST_MEDIAN_GAS_PRICE } from "./constant";
 import { QUERY_OFFSET_REACHED_END } from "../methods/constant";
 import {
   formatDecimal,
@@ -426,10 +427,10 @@ export class Query {
     throw new Error("invalid params!");
   }
 
-  // Latest 500 transactions median gas_price
+  // Latest ${LATEST_MEDIAN_GAS_PRICE} transactions median gas_price
   async getMedianGasPrice(): Promise<bigint> {
     const sql = `SELECT (PERCENTILE_CONT(0.5) WITHIN GROUP(ORDER BY gas_price)) AS median FROM (SELECT gas_price FROM transactions ORDER BY id DESC LIMIT ?) AS gas_price;`;
-    const result = await this.knex.raw(sql, [500]);
+    const result = await this.knex.raw(sql, [LATEST_MEDIAN_GAS_PRICE]);
 
     const median = result.rows[0]?.median;
     if (median == null) {