From 508b5c0f4e86fc3113f6d70891877af3e9bb7412 Mon Sep 17 00:00:00 2001
From: softsimon <softsimon@protonmail.com>
Date: Sat, 19 Sep 2020 23:02:02 +0700
Subject: [PATCH] Markets API: Adding cache for general /ticker requests

---
 backend/src/api/bisq/markets-api.ts | 10 ++++++++++
 backend/src/api/bisq/markets.ts     |  1 +
 2 files changed, 11 insertions(+)

diff --git a/backend/src/api/bisq/markets-api.ts b/backend/src/api/bisq/markets-api.ts
index 6d4e74cec..c3bac5a38 100644
--- a/backend/src/api/bisq/markets-api.ts
+++ b/backend/src/api/bisq/markets-api.ts
@@ -11,6 +11,7 @@ class BisqMarketsApi {
   private fiatCurrenciesIndexed: { [code: string]: true } = {};
   private allCurrenciesIndexed: { [code: string]: Currency } = {};
   private tradeDataByMarket: { [market: string]: TradesData[] } = {};
+  private tickersCache: Ticker | Tickers | null = null;
 
   constructor() { }
 
@@ -49,6 +50,11 @@ class BisqMarketsApi {
     });
   }
 
+  updateCache() {
+    this.tickersCache = null;
+    this.tickersCache = this.getTicker();
+  }
+
   getCurrencies(
     type: 'crypto' | 'fiat' | 'all' = 'all',
   ): Currencies {
@@ -281,6 +287,10 @@ class BisqMarketsApi {
       return this.getTickerFromMarket(market);
     }
 
+    if (this.tickersCache) {
+      return this.tickersCache;
+    }
+
     const allMarkets = this.getMarkets();
     const tickers = {};
     for (const m in allMarkets) {
diff --git a/backend/src/api/bisq/markets.ts b/backend/src/api/bisq/markets.ts
index 1bf13976e..d66e56c9a 100644
--- a/backend/src/api/bisq/markets.ts
+++ b/backend/src/api/bisq/markets.ts
@@ -93,6 +93,7 @@ class Bisq {
       }
       const time = new Date().getTime() - start;
       if (marketsDataUpdated) {
+        bisqMarket.updateCache();
         console.log('Bisq market data updated in ' + time + ' ms');
       }
     } catch (e) {