Add module error mapper

Author: AhmedHanafy725

packages/tfchain_client/lib/src/error_mapper.dart

@@ -0,0 +1,99 @@
+import 'dart:typed_data';
+
+import 'package:polkadart/scale_codec.dart';
+import 'package:tfchain_client/generated/dev/types/pallet_balances/pallet/error.dart'
+    as balances;
+import 'package:tfchain_client/generated/dev/types/frame_system/pallet/error.dart'
+    as system;
+import 'package:tfchain_client/generated/dev/types/pallet_utility/pallet/error.dart'
+    as utility;
+import 'package:tfchain_client/generated/dev/types/pallet_scheduler/pallet/error.dart'
+    as scheduler;
+import 'package:tfchain_client/generated/dev/types/substrate_validator_set/pallet/error.dart'
+    as validatorSet;
+import 'package:tfchain_client/generated/dev/types/pallet_session/pallet/error.dart'
+    as session;
+import 'package:tfchain_client/generated/dev/types/pallet_grandpa/pallet/error.dart'
+    as grandpa;
+import 'package:tfchain_client/generated/dev/types/pallet_tfgrid/pallet/error.dart'
+    as tfgrid;
+import 'package:tfchain_client/generated/dev/types/pallet_smart_contract/pallet/error.dart'
+    as smartContract;
+
+import 'package:tfchain_client/generated/dev/types/pallet_tft_bridge/pallet/error.dart'
+    as tftBridge;
+import 'package:tfchain_client/generated/dev/types/pallet_tft_price/pallet/error.dart'
+    as tftPrice;
+import 'package:tfchain_client/generated/dev/types/pallet_burning/pallet/error.dart'
+    as burning;
+import 'package:tfchain_client/generated/dev/types/pallet_kvstore/pallet/error.dart'
+    as kvstore;
+import 'package:tfchain_client/generated/dev/types/pallet_collective/pallet/error.dart'
+    as council;
+import 'package:tfchain_client/generated/dev/types/pallet_membership/pallet/error.dart'
+    as membership;
+import 'package:tfchain_client/generated/dev/types/pallet_dao/pallet/error.dart'
+    as dao;
+
+import 'package:tfchain_client/generated/dev/types/pallet_validator/pallet/error.dart'
+    as validator;
+
+class Errors {
+  final int moduleIndex;
+  final Uint8List errorIndex;
+
+  Errors({required this.moduleIndex, required this.errorIndex});
+
+  _findModule() {
+    switch (moduleIndex) {
+      case 0:
+        return system.$ErrorCodec();
+      case 3:
+        return utility.$ErrorCodec();
+      case 4:
+        return scheduler.$ErrorCodec();
+      case 10:
+        return validatorSet.$ErrorCodec();
+      case 11:
+        return session.$ErrorCodec();
+      case 13:
+        return grandpa.$ErrorCodec();
+      case 20:
+        return balances.$ErrorCodec();
+      case 25:
+        return tfgrid.$ErrorCodec();
+      case 26:
+        return smartContract.$ErrorCodec();
+      case 27:
+        return tftBridge.$ErrorCodec();
+      case 28:
+        return tftPrice.$ErrorCodec();
+      case 29:
+        return burning.$ErrorCodec();
+      case 30:
+        return kvstore.$ErrorCodec();
+      case 40:
+        return council.$ErrorCodec();
+      case 41:
+        return membership.$ErrorCodec();
+      case 43:
+        return dao.$ErrorCodec();
+      case 50:
+        return validator.$ErrorCodec();
+      default:
+        throw Exception(
+            'Error: Invalid module index. module: "$moduleIndex", error: "$errorIndex"');
+    }
+  }
+
+  decode() {
+    final module = _findModule();
+    try {
+      final x = module.decode(Input.fromBytes(errorIndex));
+      return x.variantName;
+    } catch (e) {
+      throw Exception(
+          'Error: Invalid error index. module: "$moduleIndex", error: "$errorIndex"');
+    }
+  }
+}