From 0e980693afaa24268b9a8658ad70496f2eeae8d9 Mon Sep 17 00:00:00 2001
From: siiky <github-siiky@net-c.cat>
Date: Fri, 24 Nov 2023 18:26:46 +0000
Subject: [PATCH] feat: fallback to BitPay ticker

---
 lib/ticker.js | 42 ++++++++++++++++++++++++------------------
 1 file changed, 24 insertions(+), 18 deletions(-)

diff --git a/lib/ticker.js b/lib/ticker.js
index 86d77e6d..3fe9a7ad 100644
--- a/lib/ticker.js
+++ b/lib/ticker.js
@@ -14,26 +14,32 @@ const FETCH_INTERVAL = 58000
 
 const PEGGED_FIAT_CURRENCIES = { NAD: 'ZAR' }
 
-function _getRates (settings, fiatCode, cryptoCode) {
-  return Promise.resolve()
-    .then(() => {
-      const config = settings.config
-      const tickerName = configManager.getWalletSettings(cryptoCode, config).ticker
-      const market = [cryptoCode, fiatCode].join('-')
+const FALLBACK_TICKER = 'bitpay'
 
-      return buildTicker(fiatCode, cryptoCode, tickerName)
-        .then(r => {
-          return lastRate[market] = {
-            rates: r.rates,
-            timestamp: Date.now()
-          }
-        })
-        .catch(err => {
-          logger.error(err)
-          return lastRate[market]
-        })
+const hasRatesOrReject = r => _.get(['rates'], r) ?
+  r :
+  Promise.reject(new Error("Failed to get ticker rates"))
+
+const get1 = (market, fiatCode, cryptoCode, ticker) =>
+  buildTicker(fiatCode, cryptoCode, ticker)
+    .then(hasRatesOrReject)
+    .then(({ rates }) => {
+      return lastRate[market] = { rates, timestamp: Date.now() }
     })
-}
+
+const _getRates = (settings, fiatCode, cryptoCode) => Promise.resolve()
+  .then(() => {
+    const ticker = configManager.getWalletSettings(cryptoCode, settings.config).ticker
+    const market = [cryptoCode, fiatCode].join('-')
+    return get1(market, fiatCode, cryptoCode, ticker)
+      .catch(err => {
+        logger.error(err)
+        return ticker === FALLBACK_TICKER ?
+          lastRate[market] :
+          get1(market, fiatCode, cryptoCode, FALLBACK_TICKER)
+      })
+      .then(hasRatesOrReject)
+  })
 
 function buildTicker (fiatCode, cryptoCode, tickerName) {
   fiatCode = _.defaultTo(fiatCode, _.get([fiatCode], PEGGED_FIAT_CURRENCIES))