Problem: Blockchain upgraded with new API spec

lib/infrastructure/blockchain/blockchain_info_repository.dart

@@ -35,14 +35,13 @@ class BlockchainInfoRepository {
   }
 
   Future<Map<String, String>> fetchGasPrice() async {
-    final GasPrices200Response? gasPrice = await queryApi.gasPrices();
-    final price = gasPrice?.prices.firstOrNull;
-    final double? gasPriceValue = double.tryParse(price?.amount ?? "0.01");
-    final String denom = price?.denom ?? feeDenom;
+    final EvmBaseFee200Response? gasPrice = await queryApi.baseFee();
+    final price = gasPrice?.baseFee;
+    final double? gasPriceValue = double.tryParse(price ?? "0.02");
     return {
-      "gasPrice": "$gasPriceValue $denom",
+      "gasPrice": "$gasPriceValue $feeDenom",
       "amount": gasPriceValue.toString(),
-      "denom": denom
+      "denom": feeDenom
     };
   }
 }

lib/infrastructure/blockchain/wallet_repository.dart

@@ -237,7 +237,7 @@ class WalletRepository {
     String gasPriceStr,
     mantra.Simulate200ResponseGasInfo gasInfo,
   ) {
-    final gasPrice = double.parse(gasPriceStr);
+    final gasPrice = double.parse(gasPriceStr) * gasLimitMultiplier;
     final gasLimit = double.parse(
         gasInfo.gasUsed ?? defaultGasUsed
     ) * gasLimitMultiplier;

lib/infrastructure/constants.dart

@@ -5,5 +5,5 @@ const String feeDenom = "uom";
 const int feeExponent = 6;
 // For building transactions, lib/infrastructure/blockchain/wallet_repository.dart
 const String defaultGasUsed = "30000";
-const double gasLimitMultiplier = 3;
-const String explorerUrl = "https://explorer.mantrachain.io/MANTRA-Dukong";
+const double gasLimitMultiplier = 2;
+const String explorerUrl = "https://mantrascan.io/dukong";

lib/presentation/home_page/dapps/tx_status_widget.dart

@@ -175,7 +175,7 @@ class _TxStatusWidgetState extends State<TxStatusWidget> {
                   context,
                   MaterialPageRoute(
                     builder: (context) => Browser(
-                      title: "MANTRA Explorer",
+                      title: "MANTRA Scan",
                       url: "$explorerUrl/tx/$_txHash",
                     ),
                   ),

pubspec.lock

@@ -492,8 +492,8 @@ packages:
     dependency: "direct main"
     description:
       path: "."
-      ref: main
-      resolved-ref: "63edd4cc2da12b80a002e3111d7f957cc5b5a761"
+      ref: "v0.2.0"
+      resolved-ref: "23df8d15c796f7bbf3ad2d5a7bda412437a4a8c2"
       url: "https://github.com/BigtoC/mantrachain-dart.git"
     source: git
     version: "1.0.0"

pubspec.yaml

@@ -15,7 +15,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
 # Read more about iOS versioning at
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
-version: 3.0.3
+version: 3.1.0
 
 environment:
   sdk: "^3.8.0"
@@ -41,7 +41,7 @@ dependencies:
   mantrachain_dart_sdk:
     git:
       url: https://github.com/BigtoC/mantrachain-dart.git
-      ref: main
+      ref: v0.2.0
   cosmos_sdk: ^2.7.0
   blockchain_utils: ^5.0.0
   flutter_secure_storage: ^9.2.4

test/infrastructure/blockchain/wallet_repository_test.dart

@@ -15,7 +15,8 @@ void main() {
     group("_calculateFee", () {
       // Create a test-only method that exposes the private _calculateFee method
       Fee calculateFeeForTesting(
-          String gasPriceStr, mantra.Simulate200ResponseGasInfo gasInfo
+        String gasPriceStr,
+        mantra.Simulate200ResponseGasInfo gasInfo,
       ) {
         return walletRepository.calculateFee(gasPriceStr, gasInfo);
       }
@@ -25,7 +26,7 @@ void main() {
         final gasPriceStr = "0.025";
         final gasInfo = mantra.Simulate200ResponseGasInfo(
           gasUsed: "100000",
-          gasWanted: "150000"
+          gasWanted: "150000",
         );
 
         // Act
@@ -36,31 +37,32 @@ void main() {
         expect(fee.amount.length, 1);
         expect(fee.amount[0].denom, feeDenom);
 
-        // Expected amount = gasPrice * gasLimit = 0.025 * (100000 * 3) = 7500
-        expect(fee.amount[0].amount, BigInt.from(7500));
+        expect(fee.amount[0].amount, BigInt.from(10000));
       });
 
       test("should use default gas when gasUsed is null", () {
         // Arrange
         final gasPriceStr = "0.025";
         final gasInfo = mantra.Simulate200ResponseGasInfo(
           gasUsed: null,
-          gasWanted: "150000"
+          gasWanted: "150000",
         );
 
         // Act
         final fee = calculateFeeForTesting(gasPriceStr, gasInfo);
 
         // Assert
-        expect(fee.gasLimit, BigInt.from(
-            int.parse(defaultGasUsed) * gasLimitMultiplier)
+        expect(
+          fee.gasLimit,
+          BigInt.from(int.parse(defaultGasUsed) * gasLimitMultiplier),
         );
 
-        // Expected amount = gasPrice * gasLimit = 0.025 * (30000 * 1.5) = 1125
-        // (assuming defaultGasUsed is '30000')
-        final expectedAmount = BigInt.from(double.parse(gasPriceStr) *
-                               double.parse(defaultGasUsed) *
-                               gasLimitMultiplier);
+        final expectedAmount = BigInt.from(
+          double.parse(gasPriceStr) *
+              gasLimitMultiplier *
+              double.parse(defaultGasUsed) *
+              gasLimitMultiplier,
+        );
         expect(fee.amount[0].amount, expectedAmount);
       });
 
@@ -69,29 +71,30 @@ void main() {
         final gasPriceStr = "0.01234";
         final gasInfo = mantra.Simulate200ResponseGasInfo(
           gasUsed: "123456",
-          gasWanted: "200000"
+          gasWanted: "200000",
         );
 
         // Act
         final fee = calculateFeeForTesting(gasPriceStr, gasInfo);
 
         // Assert
         // Check that the result is properly rounded with no decimal places
-        // Expected calculation: 0.01234 * (123456 * 3) = 4570.0512, truncated to 4570
-        final rawAmount = double.parse(gasPriceStr) *
-                        double.parse(gasInfo.gasUsed!) *
-                        gasLimitMultiplier;
+        final rawAmount =
+            double.parse(gasPriceStr) *
+            gasLimitMultiplier *
+            double.parse(gasInfo.gasUsed!) *
+            gasLimitMultiplier;
         final expectedAmount = BigInt.parse(rawAmount.floor().toString());
         expect(fee.amount[0].amount, expectedAmount);
-        expect(fee.amount[0].amount, BigInt.from(4570));
+        expect(fee.amount[0].amount, BigInt.from(6093));
       });
 
       test("should handle high gas values properly", () {
         // Arrange
         final gasPriceStr = "0.0001";
         final gasInfo = mantra.Simulate200ResponseGasInfo(
           gasUsed: "10000000", // 10 million gas
-          gasWanted: "15000000"
+          gasWanted: "15000000",
         );
 
         // Act
@@ -100,8 +103,7 @@ void main() {
         // Assert
         expect(fee.gasLimit, BigInt.from(10000000 * gasLimitMultiplier));
 
-        // Expected amount = 0.0001 * (10000000 * 3) = 3000
-        final expectedAmount = BigInt.from(3000);
+        final expectedAmount = BigInt.from(4000);
         expect(fee.amount[0].amount, expectedAmount);
       });
 
@@ -110,22 +112,21 @@ void main() {
         final gasPriceStr = "0.05";
         final gasInfo = mantra.Simulate200ResponseGasInfo(
           gasUsed: "99999", // odd number to test rounding
-          gasWanted: "100000"
+          gasWanted: "100000",
         );
 
         // Act
         final fee = calculateFeeForTesting(gasPriceStr, gasInfo);
 
-        // Assert
-        // Expected gasLimit = 99999 * 1.5 = 149998.5, rounded to 149999
         final expectedGasLimit = BigInt.parse(
-            (99999 * gasLimitMultiplier).toStringAsFixed(0)
+          (99999 * gasLimitMultiplier).toStringAsFixed(0),
         );
         expect(fee.gasLimit, expectedGasLimit);
 
-        // Expected amount = 0.05 * (99999 * 3) = 14999.85, floored to 14999
         final expectedAmount = BigInt.parse(
-            (0.05 * 99999 * gasLimitMultiplier).floor().toString()
+          (0.05 * gasLimitMultiplier * 99999 * gasLimitMultiplier)
+              .floor()
+              .toString(),
         );
         expect(fee.amount[0].amount, expectedAmount);
       });