Evm tx (#7)

* implement a raw evm transaction

* add check for the length of the decoded Uint8list

* fix dart analyze

* refactor function signature

* add hex prefix to address

* fix test result

---------

Co-authored-by: dev2-nomo <dev2@nomo.app>

lib/src/crypto/evm/function_signature.dart

@@ -37,7 +37,7 @@ class FunctionSignature {
       final sublist = data.sublist(offset, offset + 32).toHex;
 
       final arg = switch (value) {
-        "address" => sublist.substring(24),
+        "address" => "0x" + sublist.substring(24),
         "uint256" => sublist.toBigIntFromHex,
         "uint256[]" => () {
             final field_length = data
@@ -113,7 +113,7 @@ class FunctionSignature {
 
     if (contractFunction == null) {
       return FunctionSignature(
-        "function not found",
+        "unknown",
         null,
         decodeDataValues(data, {}),
       );

lib/src/domain/entities/transactions/evm_transaction.dart

@@ -1,5 +1,4 @@
 import 'dart:typed_data';
-
 import 'package:hive/hive.dart';
 import 'package:walletkit_dart/walletkit_dart.dart';
 
@@ -111,9 +110,13 @@ abstract base class EVMTransaction extends GenericTransaction {
     required this.input,
   });
 
-  FunctionSignature get getFunctionSignature {
+  FunctionSignature? get getFunctionSignature {
     if (!_cachedFunctionSigs.containsKey(hash)) {
-      _cachedFunctionSigs[hash] = FunctionSignature.fromData(input);
+      try {
+        _cachedFunctionSigs[hash] = FunctionSignature.fromData(input);
+      } catch (e) {
+        return null;
+      }
     }
     return _cachedFunctionSigs[hash]!;
   }

test/ci/parsing/reverse-hash-computation_test.dart

@@ -28,7 +28,7 @@ void main() {
     });
 
     expect(functionSignature.args?[0].value,
-        "05870f1507d820212e921e1f39f14660336231d1");
+        "0x05870f1507d820212e921e1f39f14660336231d1");
     expect(functionSignature.args?[1].value, BigInt.from(15942468));
   });