Other than main() method this getKey() is giving error

[harishkthedeveloper]

If i call this method is some other widgets this getKey method gives path error

ERROR: Failed to load dynamic library 'lib/c_lib/lib.a': dlopen failed: library "lib/c_lib/lib.a" not found

Is there any solution for this ? i want to get this working in all widgets

[harishkthedeveloper]

Below is the code i am using from link - https://stackoverflow.com/questions/63747683/how-to-call-go-lib-from-dart-using-ffi

import 'dart:ffi' as ffi; // For FFI
import 'dart:ffi';

import 'package:ffi/ffi.dart';
import 'package:ffi/src/utf8.dart';

typedef get_key_func = ffi.Pointer<Utf8> Function(); // FFI fn signature
typedef GetKey = ffi.Pointer<Utf8> Function(); // Dart fn signature
final dylib = ffi.DynamicLibrary.open('lib/c_lib/lib.a');

final GetKey getKey =
    dylib.lookup<ffi.NativeFunction<get_key_func>>('GetKey').asFunction();

String getIv() {
  var addressOf = getKey();
  var res = addressOf.toDartString();
  // print(addressOf.cast<Uint8>().value);
  // print(addressOf.toDartString());
  print(res);
  return res;
}

[harishkthedeveloper]

getIv() if called from other widgets is giving path error.

[dcharkes]

final dylib = ffi.DynamicLibrary.open('lib/c_lib/lib.a');

This doesn't work, .a is a statically linked library, that requires using DynamicLibrary.process() or DynamicLibrary.executable(). Dynamically linked libraries are .dylib (MacOS, iOS), .dll (Windows), .so (Android, Linux).

[harishkthedeveloper]

@dcharkes Thanks for the reply
But whats the solution ? I am storing my encryption key in lib.a and i want to access the key in flutter widgets. is there any work around?

[dcharkes]

Compile to a .dylib instead of .a. Or, if you're building a Flutter application (instead of Dart stand alone) link the .a statically into your Flutter application.