Upgrade to dart3

lib/src/algorand.dart

@@ -563,7 +563,9 @@ class Algorand {
   Future<BigInt> getBalance(String address) async {
     final response = await _indexer.getAccountByAddress(address);
 
-    return response.account.amountWithoutPendingRewards;
+    return response.account != null
+        ? response.account!.amountWithoutPendingRewards
+        : BigInt.zero;
   }
 
   /// Get the list of pending transactions by address, sorted by priority,

lib/src/api/responses/accounts/account_lookup_response.dart

@@ -6,8 +6,8 @@ part 'account_lookup_response.g.dart';
 @JsonSerializable(fieldRename: FieldRename.kebab)
 class AccountResponse {
   /// Round at which the results were computed.
-  final int currentRound;
-  final AccountInformation account;
+  final int? currentRound;
+  final AccountInformation? account;
 
   AccountResponse({required this.currentRound, required this.account});
 

lib/src/clients/algorand_client.dart

@@ -27,9 +27,9 @@ abstract class AlgorandClient {
 
     final options = BaseOptions(
       baseUrl: apiUrl,
-      connectTimeout: connectTimeout.inMilliseconds,
-      receiveTimeout: receiveTimeout.inMilliseconds,
-      sendTimeout: sendTimeout.inMilliseconds,
+      connectTimeout: connectTimeout,
+      receiveTimeout: receiveTimeout,
+      sendTimeout: sendTimeout,
       headers: headers,
     );
 

lib/src/exceptions/algorand_exception.dart

@@ -15,10 +15,10 @@ class AlgorandException implements Exception {
     this.cause,
   }) : _message = message;
 
-  factory AlgorandException.fromDioError(DioError error) {
+  factory AlgorandException.fromDioError(DioException error) {
     return AlgorandException(
       statusCode: error.response?.statusCode,
-      message: error.message,
+      message: error.message!,
       cause: error,
     );
   }

lib/src/repositories/application_repository.dart

@@ -21,8 +21,8 @@ class ApplicationRepository {
   Future<TealCompilation> compileTEAL(String sourceCode) async {
     try {
       return await applicationService.compileTEAL(sourceCode);
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -34,8 +34,8 @@ class ApplicationRepository {
   Future<DryRunResponse> dryrun(DryRunRequest request) async {
     try {
       return await applicationService.dryrun(request.toMessagePack());
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 }

lib/src/repositories/indexer_repository.dart

@@ -29,8 +29,8 @@ class IndexerRepository {
   Future<IndexerHealth> health() async {
     try {
       return await indexerService.health();
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -71,8 +71,8 @@ class IndexerRepository {
       }
 
       return await indexerService.searchTransactions(queryParams);
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -85,8 +85,8 @@ class IndexerRepository {
   ) async {
     try {
       return await assetService.searchAssets(queryParams);
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -111,8 +111,8 @@ class IndexerRepository {
       }
 
       return await accountService.searchAccounts(queryParams);
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -125,8 +125,8 @@ class IndexerRepository {
   ) async {
     try {
       return await applicationService.searchApplications(queryParams);
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -137,8 +137,8 @@ class IndexerRepository {
   Future<TransactionResponse> getTransactionById(String transactionId) async {
     try {
       return await indexerService.getTransactionById(transactionId);
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 }

lib/src/repositories/node_repository.dart

@@ -16,8 +16,8 @@ class NodeRepository {
     try {
       final genesis = await service.genesis();
       return genesis;
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -28,7 +28,7 @@ class NodeRepository {
     try {
       await service.health();
       return true;
-    } on DioError {
+    } on DioException {
       return false;
     }
   }
@@ -40,8 +40,8 @@ class NodeRepository {
   Future<NodeStatus> status() async {
     try {
       return await service.status();
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -57,8 +57,8 @@ class NodeRepository {
   Future<NodeStatus> statusAfterRound(int round) async {
     try {
       return await service.statusAfterRound(round);
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -69,8 +69,8 @@ class NodeRepository {
   Future<LedgerSupply> supply() async {
     try {
       return await service.supply();
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 }

lib/src/repositories/transaction_repository.dart

@@ -25,8 +25,8 @@ class TransactionRepository {
   Future<TransactionParams> getSuggestedTransactionParams() async {
     try {
       return await transactionService.getSuggestedTransactionParams();
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -48,8 +48,8 @@ class TransactionRepository {
       await this.waitForConfirmation(response.transactionId, timeout: timeout);
 
       return response.transactionId;
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -77,8 +77,8 @@ class TransactionRepository {
       await this.waitForConfirmation(response.transactionId, timeout: timeout);
 
       return response.transactionId;
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -102,8 +102,8 @@ class TransactionRepository {
       await this.waitForConfirmation(response.transactionId, timeout: timeout);
 
       return response.transactionId;
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -131,8 +131,8 @@ class TransactionRepository {
       await this.waitForConfirmation(response.transactionId, timeout: timeout);
 
       return response.transactionId;
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -152,8 +152,8 @@ class TransactionRepository {
         address,
         max: max,
       );
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -169,8 +169,8 @@ class TransactionRepository {
   }) async {
     try {
       return transactionService.getPendingTransactions(max: max);
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -195,8 +195,8 @@ class TransactionRepository {
   ) async {
     try {
       return transactionService.getPendingTransactionById(transactionId);
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
   }
 
@@ -227,8 +227,8 @@ class TransactionRepository {
         await nodeService.statusAfterRound(currentRound);
         currentRound++;
       }
-    } on DioError catch (ex) {
-      throw AlgorandException(message: ex.message, cause: ex);
+    } on DioException catch (ex) {
+      throw AlgorandException(message: ex.message!, cause: ex);
     }
 
     throw AlgorandException(