feat: add tron type data encode support, dart impl for tronWeb typeData.ts

Author: memtopia

example/lib/example/tron/typed_data_example.dart

@@ -0,0 +1,52 @@
+import 'package:on_chain/tron/tron.dart';
+
+void main() {
+  final domain = TronTypedDataDomain(
+    name: 'Permit2',
+    chainId: BigInt.parse('728126428'),
+    verifyingContract: 'TDJNTBi51CnnpCYYgi6GitoT4CJWrqim2G',
+  );
+
+  // 定义类型结构
+  final types = {
+    'PermitDetails': [
+      const TronTypedDataField(name: 'token', type: 'address'),
+      const TronTypedDataField(name: 'amount', type: 'uint160'),
+      const TronTypedDataField(name: 'expiration', type: 'uint48'),
+      const TronTypedDataField(name: 'nonce', type: 'uint48'),
+    ],
+    'PermitSingle': [
+      const TronTypedDataField(name: 'details', type: 'PermitDetails'),
+      const TronTypedDataField(name: 'spender', type: 'address'),
+      const TronTypedDataField(name: 'sigDeadline', type: 'uint256'),
+    ],
+  };
+
+  final value = {
+    'details': {
+      'token': '0xa614f803b6fd780986a42c78ec9c7f77e6ded13c',
+      'amount': '1100000',
+      'expiration': 0,
+      'nonce': 1,
+    },
+    'spender': '0xbde814ebd17a0b25c39ee16a8b2ff48d1628e503',
+    'sigDeadline': 1753172632,
+  };
+
+  try {
+    final encoder = TronTypedDataEncoder(types);
+    print('Primary Type: ${encoder.primaryType}');
+
+    final domainHash = TronTypedDataEncoder.hashDomain(domain);
+    print('Domain Hash: $domainHash');
+
+    final structHash = encoder.hash(value);
+    print('Struct Hash: $structHash');
+
+    final finalHash = TronTypedDataEncoder.hashTypedData(domain, types, value);
+    print('Final TIP-712 Hash: $finalHash');
+    // expected finalHash == 9cd34058512e83f5f87643fa4388c2eda64079e4e532acfd5a184f3adf943279
+  } catch (e) {
+    print('Error: $e');
+  }
+}