From ce724c18959aa183838b85d48b8c86bd7a5336a7 Mon Sep 17 00:00:00 2001
From: zian <mynameiszian@gmail.com>
Date: Mon, 19 Jun 2023 12:08:37 +0800
Subject: [PATCH] add mandala node runner

---
 mandala-node-runner/src/error.rs | 20 ++++++++++++++++++++
 mandala-node-runner/src/lib.rs   |  4 +---
 2 files changed, 21 insertions(+), 3 deletions(-)
 create mode 100644 mandala-node-runner/src/error.rs

diff --git a/mandala-node-runner/src/error.rs b/mandala-node-runner/src/error.rs
new file mode 100644
index 0000000..6a3dda2
--- /dev/null
+++ b/mandala-node-runner/src/error.rs
@@ -0,0 +1,20 @@
+
+#[derive(Debug)]
+pub enum Error {
+    Io(std::io::Error),
+    CouldNotExtractPort,
+}
+
+impl std::fmt::Display for Error {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Error::Io(err) => write!(f, "IO error: {err}"),
+            Error::CouldNotExtractPort => write!(
+                f,
+                "could not extract port from running substrate node's stdout"
+            ),
+        }
+    }
+}
+
+impl std::error::Error for Error {}
\ No newline at end of file
diff --git a/mandala-node-runner/src/lib.rs b/mandala-node-runner/src/lib.rs
index 3bfd824..f919f72 100644
--- a/mandala-node-runner/src/lib.rs
+++ b/mandala-node-runner/src/lib.rs
@@ -1,6 +1,4 @@
-// Copyright 2019-2023 Parity Technologies (UK) Ltd.
-// This file is dual-licensed as Apache-2.0 or GPL-3.0.
-// see LICENSE for license details.
+
 
 mod error;