initial commit (migrated)

lib/core/either_extensions.dart

@@ -0,0 +1,11 @@
+import 'package:fpdart/fpdart.dart';
+
+typedef Function1<T, R> = R Function(T t);
+
+extension EitherFutureX<L, R1> on Future<Either<L, R1>> {
+  Future<Either<L, R2>> chain<R2>(
+    Function1<R1, Future<Either<L, R2>>> f,
+  ) async {
+    return (await this).fold(left, f);
+  }
+}