添加filesystem

packages/filesystem/error.ts

@@ -0,0 +1,24 @@
+// eslint-disable-next-line import/prefer-default-export, max-classes-per-file
+export class WarpTokenError {
+  error: Error;
+
+  constructor(error: Error) {
+    this.error = error;
+  }
+}
+
+export function isWarpTokenError(error: any): error is WarpTokenError {
+  return error instanceof WarpTokenError;
+}
+
+export class WarpNetworkError {
+  error: Error;
+
+  constructor(error: Error) {
+    this.error = error;
+  }
+}
+
+export function isNetworkError(error: any): error is WarpNetworkError {
+  return error instanceof WarpNetworkError;
+}