feat: add transaction simulation to web wallet

packages/flutter_fuels/lib/model/call_result.dart

@@ -0,0 +1,7 @@
+import 'transaction_receipt.dart';
+
+class CallResult {
+  final List<TransactionReceipt> receipts;
+
+  CallResult({required this.receipts});
+}

packages/flutter_fuels/lib/model/transaction_receipt.dart

@@ -0,0 +1,196 @@
+import 'dart:typed_data';
+
+abstract class TransactionReceipt {}
+
+class ReceiptCall extends TransactionReceipt {
+  final String from;
+  final String to;
+  final BigInt amount;
+  final String assetId;
+  final BigInt gas;
+  final BigInt param1;
+  final BigInt param2;
+  final BigInt pc;
+  final BigInt isField;
+
+  ReceiptCall({
+    required this.from,
+    required this.to,
+    required this.amount,
+    required this.assetId,
+    required this.gas,
+    required this.param1,
+    required this.param2,
+    required this.pc,
+    required this.isField,
+  });
+}
+
+class ReceiptReturn extends TransactionReceipt {
+  final String id;
+  final BigInt val;
+  final BigInt pc;
+  final BigInt isField;
+
+  ReceiptReturn({
+    required this.id,
+    required this.val,
+    required this.pc,
+    required this.isField,
+  });
+}
+
+class ReceiptReturnData extends TransactionReceipt {
+  final String id;
+  final BigInt ptr;
+  final BigInt len;
+  final String digest;
+  final BigInt pc;
+  final BigInt isField;
+
+  ReceiptReturnData({
+    required this.id,
+    required this.ptr,
+    required this.len,
+    required this.digest,
+    required this.pc,
+    required this.isField,
+  });
+}
+
+class ReceiptPanic extends TransactionReceipt {
+  final String id;
+  final BigInt reason;
+  final BigInt pc;
+  final BigInt isField;
+  final String contractId;
+
+  ReceiptPanic({
+    required this.id,
+    required this.reason,
+    required this.pc,
+    required this.isField,
+    required this.contractId,
+  });
+}
+
+class ReceiptRevert extends TransactionReceipt {
+  final String id;
+  final BigInt val;
+  final BigInt pc;
+  final BigInt isField;
+
+  ReceiptRevert({
+    required this.id,
+    required this.val,
+    required this.pc,
+    required this.isField,
+  });
+}
+
+class ReceiptLog extends TransactionReceipt {
+  final String id;
+  final BigInt val0;
+  final BigInt val1;
+  final BigInt val2;
+  final BigInt val3;
+  final BigInt pc;
+  final BigInt isField;
+
+  ReceiptLog({
+    required this.id,
+    required this.val0,
+    required this.val1,
+    required this.val2,
+    required this.val3,
+    required this.pc,
+    required this.isField,
+  });
+}
+
+class ReceiptLogData extends TransactionReceipt {
+  final String id;
+  final BigInt val0;
+  final BigInt val1;
+  final BigInt ptr;
+  final BigInt len;
+  final String digest;
+  final BigInt pc;
+  final BigInt isField;
+
+  ReceiptLogData({
+    required this.id,
+    required this.val0,
+    required this.val1,
+    required this.ptr,
+    required this.len,
+    required this.digest,
+    required this.pc,
+    required this.isField,
+  });
+}
+
+class ReceiptTransfer extends TransactionReceipt {
+  final String from;
+  final String to;
+  final BigInt amount;
+  final String assetId;
+  final BigInt pc;
+  final BigInt isField;
+
+  ReceiptTransfer(
+      {required this.from,
+      required this.to,
+      required this.amount,
+      required this.assetId,
+      required this.pc,
+      required this.isField});
+}
+
+class ReceiptTransferOut extends TransactionReceipt {
+  final String from;
+  final String to;
+  final BigInt amount;
+  final String assetId;
+  final BigInt pc;
+  final BigInt isField;
+
+  ReceiptTransferOut({
+    required this.from,
+    required this.to,
+    required this.amount,
+    required this.assetId,
+    required this.pc,
+    required this.isField,
+  });
+}
+
+class ReceiptScriptResult extends TransactionReceipt {
+  final BigInt result;
+  final BigInt gasUsed;
+
+  ReceiptScriptResult({
+    required this.result,
+    required this.gasUsed,
+  });
+}
+
+class ReceiptMessageOut extends TransactionReceipt {
+  final String messageID;
+  final String sender;
+  final String recipient;
+  final BigInt amount;
+  final String nonce;
+  final String digest;
+  final Uint8List data;
+
+  ReceiptMessageOut({
+    required this.messageID,
+    required this.sender,
+    required this.recipient,
+    required this.amount,
+    required this.nonce,
+    required this.digest,
+    required this.data,
+  });
+}

packages/flutter_fuels/lib/wallet/fuel_wallet.dart

@@ -1,3 +1,5 @@
+import 'package:flutter_fuels/model/call_result.dart';
+
 import 'platform_impl/stub_wallet.dart'
     if (dart.library.io) 'platform_impl/mobile_wallet.dart'
     if (dart.library.html) 'platform_impl/web_wallet.dart';
@@ -74,7 +76,7 @@ class FuelWallet {
     required int gasPrice,
     required int gasLimit,
     required int maturity,
-  }) async {
+  }) {
     return _wallet.transfer(
       networkUrl: networkUrl,
       privateKey: privateKey,
@@ -89,7 +91,7 @@ class FuelWallet {
 
   Future<String> signMessage({
     required String message,
-  }) async {
+  }) {
     return _wallet.signMessage(
       networkUrl: networkUrl,
       privateKey: privateKey,
@@ -99,14 +101,24 @@ class FuelWallet {
 
   Future<String> sendTransaction({
     required dynamic transactionRequest,
-  }) async {
+  }) {
     return _wallet.sendTransaction(
       networkUrl: networkUrl,
       privateKey: privateKey,
       transactionRequest: transactionRequest,
     );
   }
 
+  Future<CallResult> simulateTransaction({
+    required dynamic transactionRequest,
+  }) {
+    return _wallet.simulateTransaction(
+      networkUrl: networkUrl,
+      privateKey: privateKey,
+      transactionRequest: transactionRequest,
+    );
+  }
+
   static String addHexPrefix(String address) {
     if (address.startsWith('0x')) {
       return address;

packages/flutter_fuels/lib/wallet/platform_impl/base_wallet.dart

@@ -1,3 +1,5 @@
+import 'package:flutter_fuels/model/call_result.dart';
+
 abstract class BaseWallet {
   Future<Map> generateNewWallet();
 
@@ -31,4 +33,10 @@ abstract class BaseWallet {
     required String privateKey,
     required dynamic transactionRequest,
   });
+
+  Future<CallResult> simulateTransaction({
+    required String networkUrl,
+    required String privateKey,
+    required dynamic transactionRequest,
+  });
 }

packages/flutter_fuels/lib/wallet/platform_impl/js_interop/js_fuels_wallet.dart

@@ -13,7 +13,7 @@ external dynamic newWalletFromMnemonic(String mnemonic);
 external dynamic newWalletFromPrivateKey(String privateKey);
 
 @JS('transfer')
-external dynamic transfer(
+external String transfer(
   String privateKey,
   String networkUrl,
   String destinationB256Address,
@@ -25,14 +25,21 @@ external dynamic transfer(
 );
 
 @JS('signMessage')
-external dynamic signMessage(
+external String signMessage(
   String privateKey,
   String networkUrl,
   String message,
 );
 
 @JS('sendTransaction')
-external dynamic sendTransaction(
+external String sendTransaction(
+  String privateKey,
+  String networkUrl,
+  String transactionRequestJson,
+);
+
+@JS('simulateTransaction')
+external String simulateTransaction(
   String privateKey,
   String networkUrl,
   String transactionRequestJson,

packages/flutter_fuels/lib/wallet/platform_impl/mobile_wallet.dart

@@ -1,3 +1,4 @@
+import 'package:flutter_fuels/model/call_result.dart';
 import 'package:fuels/fuels.dart';
 
 import '../../ffi/mobile_wrapper.dart';
@@ -130,4 +131,13 @@ class FuelWalletImpl extends BaseWallet {
     // TODO: implement
     throw UnimplementedError();
   }
+
+  @override
+  Future<CallResult> simulateTransaction(
+      {required String networkUrl,
+      required String privateKey,
+      required transactionRequest}) {
+    // TODO: implement
+    throw UnimplementedError();
+  }
 }

packages/flutter_fuels/lib/wallet/platform_impl/stub_wallet.dart

@@ -1,3 +1,5 @@
+import 'package:flutter_fuels/model/call_result.dart';
+
 import 'base_wallet.dart';
 
 class FuelWalletImpl extends BaseWallet {
@@ -51,4 +53,12 @@ class FuelWalletImpl extends BaseWallet {
   }) {
     throw Exception('Stub implementation');
   }
+
+  @override
+  Future<CallResult> simulateTransaction(
+      {required String networkUrl,
+      required String privateKey,
+      required transactionRequest}) {
+    throw Exception('Stub implementation');
+  }
 }