diff --git a/lib/core/util/theme.dart b/lib/core/util/theme.dart
index 79b122a..50afc08 100644
--- a/lib/core/util/theme.dart
+++ b/lib/core/util/theme.dart
@@ -8,6 +8,12 @@ class CustomTheme {
   static const Color bgSecondColor = Color(0xFF2F2F47);
   static const Color gray = Color.fromARGB(255, 149, 149, 149);
 
+  static const List<Color> nftBgColors = [
+    CustomTheme.primaryColor,
+    CustomTheme.secondColor,
+    Colors.deepPurpleAccent,
+  ];
+
   static const TextStyle textSmallPrimary = TextStyle(color: primaryColor, fontSize: 12, fontWeight: FontWeight.w600);
   static const TextStyle textPrimary = TextStyle(color: primaryColor, fontSize: 16, fontWeight: FontWeight.w600);
   static const TextStyle textSmallWhite = TextStyle(color: Colors.white, fontSize: 12, fontWeight: FontWeight.w600);
diff --git a/lib/core/util/web3/eth_conversions.dart b/lib/core/util/web3/eth_conversions.dart
new file mode 100644
index 0000000..32947da
--- /dev/null
+++ b/lib/core/util/web3/eth_conversions.dart
@@ -0,0 +1,36 @@
+import 'dart:math';
+
+class EthConversions {
+  static double weiToEth(BigInt amount, int? decimal) {
+    if (decimal == null) {
+      double db = amount / BigInt.from(10).pow(18);
+      return double.parse(db.toStringAsFixed(2));
+    } else {
+      double db = amount / BigInt.from(10).pow(decimal);
+      return double.parse(db.toStringAsFixed(2));
+    }
+  }
+
+  static double weiToEthUnTrimmed(BigInt amount, int? decimal) {
+    if (decimal == null) {
+      double db = amount / BigInt.from(10).pow(18);
+      return double.parse(db.toStringAsFixed(6));
+    } else {
+      double db = amount / BigInt.from(10).pow(decimal);
+      return double.parse(db.toStringAsFixed(6));
+    }
+  }
+
+  static String weiToGwei(BigInt amount) {
+    var db = amount / BigInt.from(10).pow(9);
+    return db.toStringAsPrecision(2);
+  }
+
+  static BigInt ethToWei(String amount, int? decimal) {
+    double db = double.parse(amount) * pow(10, 4);
+    int it = db.toInt();
+    BigInt bi = BigInt.from(it) *
+        BigInt.from(10).pow(decimal == null ? 14 : decimal - 4);
+    return bi;
+  }
+}
diff --git a/lib/pages/begin/data/models/wallet_info.dart b/lib/pages/begin/data/models/wallet_info.dart
index 95f2e47..e815621 100644
--- a/lib/pages/begin/data/models/wallet_info.dart
+++ b/lib/pages/begin/data/models/wallet_info.dart
@@ -5,8 +5,8 @@ enum WalletImportMethod { metamask, privateKey, local }
 
 class WalletInfo {
   final String address;
-  final double etherAmount;
   final WalletImportMethod importMethod;
+  late final double etherAmount;
 
   /// 貨幣
   List<TokenInfo> tokenInfoList = [];
@@ -16,8 +16,8 @@ class WalletInfo {
 
   WalletInfo({
     required this.address,
-    required this.etherAmount,
     required this.importMethod,
+    required this.etherAmount,
   });
 
   bool get isFromMetamask => importMethod == WalletImportMethod.metamask;
diff --git a/lib/pages/begin/presentation/pages/nft_detail_page.dart b/lib/pages/begin/presentation/pages/nft_detail_page.dart
index 387d33e..af2d047 100644
--- a/lib/pages/begin/presentation/pages/nft_detail_page.dart
+++ b/lib/pages/begin/presentation/pages/nft_detail_page.dart
@@ -111,7 +111,7 @@ class _NftDetailPageState extends State<NftDetailPage> {
                                   _metaDataBox(),
                                 ],
                               ),
-                              SizedBox(height: 25),
+                              const SizedBox(height: 25),
                               Wrap(
                                 spacing: 5,
                                 runSpacing: 5,
@@ -145,12 +145,12 @@ class _NftDetailPageState extends State<NftDetailPage> {
                               CommonButton(
                                 onPress: () {},
                                 color: CustomTheme.secondColor,
-                                child: Container(
+                                child: SizedBox(
                                   width: double.infinity,
                                   child: Container(
-                                    padding: EdgeInsets.all(20),
+                                    padding: const EdgeInsets.all(20),
                                     alignment: Alignment.center,
-                                    child: Text(
+                                    child: const Text(
                                       'send',
                                       style: CustomTheme.textWhite,
                                     ),
@@ -163,7 +163,7 @@ class _NftDetailPageState extends State<NftDetailPage> {
                                 color: Colors.white,
                                 child: Container(
                                   width: double.infinity,
-                                  padding: EdgeInsets.all(20),
+                                  padding: const EdgeInsets.all(20),
                                   alignment: Alignment.center,
                                   child: Row(
                                     mainAxisAlignment: MainAxisAlignment.center,
@@ -186,7 +186,7 @@ class _NftDetailPageState extends State<NftDetailPage> {
                                     Row(
                                       children: [
                                         Image.asset('assets/images/crown.png', width: 30),
-                                        Text(
+                                        const Text(
                                           '賦能',
                                           style: CustomTheme.textWhite,
                                         ),
@@ -214,20 +214,20 @@ class _NftDetailPageState extends State<NftDetailPage> {
   Widget _metaDataBox() {
     return Expanded(
       child: Container(
-        padding: EdgeInsets.symmetric(vertical: 14, horizontal: 8),
+        padding: const EdgeInsets.symmetric(vertical: 14, horizontal: 8),
         decoration: BoxDecoration(
           color: CustomTheme.bgSecondColor,
           borderRadius: BorderRadius.circular(5),
         ),
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            const Text(
+          children: const [
+            Text(
               'Name',
               style: CustomTheme.textPrimary,
             ),
-            const SizedBox(height: 10),
-            const Text(
+            SizedBox(height: 10),
+            Text(
               '123',
               style: CustomTheme.textSmallWhite,
             ),
@@ -239,12 +239,12 @@ class _NftDetailPageState extends State<NftDetailPage> {
 
   Widget _metaDataTag() {
     return Container(
-      padding: EdgeInsets.all(8),
+      padding: const EdgeInsets.all(8),
       decoration: BoxDecoration(
         color: CustomTheme.primaryColor,
         borderRadius: BorderRadius.circular(20),
       ),
-      child: Text(
+      child: const Text(
         '# body1',
         style: CustomTheme.textBlack,
       ),