feat: Crypto transfer issue solved #2610

lib/app/shared/extension/double_extension.dart

@@ -2,6 +2,9 @@ extension DoubleExtension on double {
   String decimalNumber(int n) {
     int number = 1;
     for (int i = 0; i < n; i++) {
+      if (i > toString().split('.').toList().last.length) {
+        break;
+      }
       number *= 10;
     }
 

lib/app/shared/extension/string_extension.dart

@@ -1,6 +1,7 @@
 import 'dart:convert';
 
 import 'package:convert/convert.dart';
+import 'package:decimal/decimal.dart';
 import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
 
@@ -43,4 +44,26 @@ extension StringExtension on String {
     final String bytes = hex.encode(encode);
     return bytes;
   }
+
+  bool get isEVM {
+    if (this == 'ETH' || this == 'MATIC' || this == 'FTM' || this == 'BNB') {
+      return true;
+    }
+    return false;
+  }
+
+  String decimalNumber(int n) {
+    int number = 1;
+    for (int i = 0; i < n; i++) {
+      if (i > toString().split('.').toList().last.length) {
+        break;
+      }
+      number *= 10;
+    }
+
+    final twoDecimalNumber =
+        (Decimal.parse(this) * Decimal.parse(number.toString())).floor() /
+            Decimal.parse(number.toString());
+    return twoDecimalNumber.toDecimal().toString();
+  }
 }

lib/app/shared/m_web3_client/m_web3_client.dart

@@ -4,7 +4,6 @@ import 'package:flutter/services.dart';
 import 'package:http/http.dart' as http;
 import 'package:http/http.dart';
 import 'package:web3dart/crypto.dart';
-import 'package:web3dart/json_rpc.dart';
 import 'package:web3dart/web3dart.dart';
 
 class MWeb3Client {
@@ -229,24 +228,22 @@ class MWeb3Client {
       return txId;
     } catch (e, s) {
       log.e('sendToken() error: $e , stack: $s');
-      if (e is RPCError) rethrow;
-      return null;
+      rethrow;
     }
   }
 
-  static Future<BigInt> estimateEthereumFee({
+  // maxGas, gasPrice, feeData
+  static Future<(BigInt, EtherAmount, BigInt)> estimateEVMFee({
     required String web3RpcURL,
     required EthereumAddress sender,
     required EthereumAddress reciever,
     required EtherAmount amount,
     String? data,
   }) async {
     log.i('estimateEthereumFee');
-    late EtherAmount gasPrice = EtherAmount.inWei(BigInt.one);
+    final Web3Client web3Client = Web3Client(web3RpcURL, http.Client());
+    final gasPrice = await web3Client.getGasPrice();
     try {
-      final Web3Client web3Client = Web3Client(web3RpcURL, http.Client());
-      gasPrice = await web3Client.getGasPrice();
-
       log.i('from: ${sender.hex}');
       log.i('to: ${reciever.hex}');
       log.i('gasPrice: ${gasPrice.getInWei}');
@@ -264,31 +261,35 @@ class MWeb3Client {
 
       final fee = maxGas * gasPrice.getInWei;
       log.i('maxGas * gasPrice.getInWei = $fee');
-      return fee;
+      return (maxGas, gasPrice, fee);
     } catch (e, s) {
       log.e('e: $e, s: $s');
-      final fee = BigInt.from(21000) * gasPrice.getInWei;
+      final maxGas = BigInt.from(21000);
+      final fee = maxGas * gasPrice.getInWei;
+      log.i('maxGas - $maxGas');
       log.i('2100 * gasPrice.getInWei = $fee');
-      return fee;
+      return (maxGas, gasPrice, fee);
     }
   }
 
-  static Future<String> sendEthereumTransaction({
+  static Future<String> sendEVMTransaction({
     required String web3RpcURL,
     required int chainId,
     required String privateKey,
     required EthereumAddress sender,
     required EthereumAddress reciever,
     required EtherAmount amount,
     BigInt? gas,
+    EtherAmount? gasPrice,
     String? data,
   }) async {
     log.i('sendEthereumTransaction');
     final Web3Client web3Client = Web3Client(web3RpcURL, http.Client());
     final int nonce = await web3Client.getTransactionCount(sender);
-    final EtherAmount gasPrice = await web3Client.getGasPrice();
 
-    final maxGas = await web3Client.estimateGas(
+    gasPrice ??= await web3Client.getGasPrice();
+
+    gas ??= await web3Client.estimateGas(
       sender: sender,
       to: reciever,
       gasPrice: gasPrice,
@@ -305,12 +306,15 @@ class MWeb3Client {
       value: amount,
       data: data != null ? hexToBytes(data) : null,
       nonce: nonce,
-      maxGas: maxGas.toInt(),
+      maxGas: gas.toInt(),
     );
 
     log.i('nonce: $nonce');
-    log.i('maxGas: ${maxGas.toInt()}');
+    log.i('maxGas: ${gas.toInt()}');
     log.i('chainId: $chainId');
+    log.i('gasPrice: $gasPrice');
+    final fee = gas * gasPrice.getInWei;
+    log.i('$gas * gasPrice.getInWei = $fee');
 
     final transactionHash = await web3Client.sendTransaction(
       credentials,

lib/dashboard/connection/operation/cubit/operation_cubit.dart

@@ -212,7 +212,7 @@ class OperationCubit extends Cubit<OperationState> {
               await fetchRpcUrl(manageNetworkCubit.state.network);
           log.i('web3RpcURL - $web3RpcURL');
 
-          final feeData = await MWeb3Client.estimateEthereumFee(
+          final (_, _, feeData) = await MWeb3Client.estimateEVMFee(
             web3RpcURL: web3RpcURL,
             sender: walletConnectCubit.state.transaction!.from!,
             reciever: walletConnectCubit.state.transaction!.to!,
@@ -353,8 +353,7 @@ class OperationCubit extends Cubit<OperationState> {
 
           log.i('rpcUrl - $rpcUrl');
 
-          final String transactionHash =
-              await MWeb3Client.sendEthereumTransaction(
+          final String transactionHash = await MWeb3Client.sendEVMTransaction(
             chainId: transactionAccountData.blockchainType.chainId,
             web3RpcURL: rpcUrl,
             privateKey: transactionAccountData.secretKey,

lib/dashboard/home/tab_bar/nft/view/nft_details_page.dart

@@ -411,7 +411,7 @@ class SendButton extends StatelessWidget {
                     ? (widget.nftModel as TezosNftModel).getToken()
                     : (widget.nftModel as EthereumNftModel).getToken(),
                 withdrawalAddress: '',
-                amount: 1,
+                amount: '1',
                 isNFT: true,
               ),
             );