eth contract isar schema

lib/db/isar/main_db.dart

@@ -27,6 +27,7 @@ class MainDB {
         UTXOSchema,
         AddressSchema,
         AddressLabelSchema,
+        EthContractSchema,
       ],
       directory: (await StackFileSystem.applicationIsarDirectory()).path,
       // inspector: kDebugMode,

lib/models/isar/models/contract.dart

@@ -0,0 +1,3 @@
+abstract class Contract {
+  // for possible future use
+}

lib/models/isar/models/ethereum/eth_contract.dart

@@ -0,0 +1,42 @@
+import 'package:isar/isar.dart';
+import 'package:stackwallet/models/isar/models/contract.dart';
+
+part 'eth_contract.g.dart';
+
+@collection
+class EthContract extends Contract {
+  EthContract({
+    required this.address,
+    required this.name,
+    required this.symbol,
+    required this.decimals,
+    required this.type,
+    this.abi,
+    this.otherData,
+  });
+
+  Id id = Isar.autoIncrement;
+
+  @Index(unique: true, replace: true)
+  late final String address;
+
+  late final String name;
+
+  late final String symbol;
+
+  late final int decimals;
+
+  late final String? abi;
+
+  @enumerated
+  late final EthContractType type;
+
+  late final String? otherData;
+}
+
+// Used in Isar db and stored there as int indexes so adding/removing values
+// in this definition should be done extremely carefully in production
+enum EthContractType {
+  erc20,
+  erc721;
+}

lib/models/isar/models/isar_models.dart

@@ -4,5 +4,6 @@ export 'blockchain_data/input.dart';
 export 'blockchain_data/output.dart';
 export 'blockchain_data/transaction.dart';
 export 'blockchain_data/utxo.dart';
+export 'ethereum/eth_contract.dart';
 export 'log.dart';
 export 'transaction_note.dart';