From e7cdf9c8a4f456111fab61b54a5f901b0f49a100 Mon Sep 17 00:00:00 2001
From: noumantahir <nouman.hawkdev@gmail.com>
Date: Sun, 20 Feb 2022 04:48:04 +0500
Subject: [PATCH] coin card calculations tuning

---
 src/screens/wallet/children/coinCard.tsx   |  2 +-
 src/screens/wallet/screen/walletScreen.tsx | 15 +++++++++------
 2 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/src/screens/wallet/children/coinCard.tsx b/src/screens/wallet/children/coinCard.tsx
index 3bcb0b423..9854d2c7b 100644
--- a/src/screens/wallet/children/coinCard.tsx
+++ b/src/screens/wallet/children/coinCard.tsx
@@ -44,7 +44,7 @@ export const CoinCard = ({
             </View>
             <Text  
               style={styles.textCurValue}>
-                <Text style={{fontWeight:'500'}}>{`${ownedTokens} ${symbol}`}</Text>
+                <Text style={{fontWeight:'500'}}>{`${ownedTokens.toFixed(3)} ${symbol}`}</Text>
                 {`/${(ownedTokens * currentValue).toFixed(2)}${currencySymbol}`}
             </Text>
         </View>
diff --git a/src/screens/wallet/screen/walletScreen.tsx b/src/screens/wallet/screen/walletScreen.tsx
index 3924b4c5e..559a3f07b 100644
--- a/src/screens/wallet/screen/walletScreen.tsx
+++ b/src/screens/wallet/screen/walletScreen.tsx
@@ -90,14 +90,17 @@ const WalletScreen = ({navigation}) => {
 
     const coinData = coinsData[item.id] || {};
 
-    const _tokenMarketData = priceHistories[item.id] ? priceHistories[item.id].data : [];
+    const _tokenMarketData:number[] = priceHistories[item.id] ? priceHistories[item.id].data : [];
     const _currentValue = item.id == 'ecency' ? 1/150 : (coinData.currentPrice || 0);
     const _balance = item.id === 'ececny' ? 3 : (coinData.balance + coinData.savings);
-    const _changePercent = 
-    _tokenMarketData.length > 0 ? 
-      ((_tokenMarketData[_tokenMarketData.length - 1] - _tokenMarketData[0])/(_tokenMarketData[_tokenMarketData.length - 1]))*100
-      :
-      0;
+    
+    //calculate percentage change
+    //TODO: verify or find a way to get exact percent change. current change value slightly differs from coingecko wep app values
+    const _pastPrice = _tokenMarketData.length > 0 && _tokenMarketData[0];
+    const _latestPrice = _tokenMarketData.length > 0 && _tokenMarketData.lastItem;
+    const _changePercent = _pastPrice && _latestPrice 
+      ? ((_latestPrice - _pastPrice)/(_latestPrice)) * 100 : 0;
+
     return (
       <CoinCard 
         chartData={_tokenMarketData || []}