From 1d632f277feaa3071fe1b1ec8e1dab866078095f Mon Sep 17 00:00:00 2001
From: chanced <chanceusc@gmail.com>
Date: Sun, 31 Oct 2021 15:36:12 -0400
Subject: [PATCH] add error protocol

---
 error.js | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 error.js

diff --git a/error.js b/error.js
new file mode 100644
index 0000000..4bc8942
--- /dev/null
+++ b/error.js
@@ -0,0 +1,34 @@
+import * as Y from "yjs"; // eslint-disable-line
+import * as encoding from "lib0/encoding";
+import * as decoding from "lib0/decoding";
+
+/**
+ * @param {encoding.Encoder} encoder
+ * @param {number} code
+ * @param {string} message
+ */
+export const writeError = (encoder, code, message) => {
+    encoding.writeVarUint(encoder, code);
+    encoding.writeVarString(encoder, message);
+};
+
+/**
+ * @callback ErrorHandler
+ * @param {any} y
+ * @param {number} code
+ * @param {string} message
+ */
+
+/**
+ *
+ * @param {decoding.Decoder} decoder
+ * @param {Y.Doc} y
+ * @param {ErrorHandler} errorHandler
+ */
+export const readError = (decoder, y, errorHandler) => {
+    errorHandler(
+        y,
+        decoding.readVarUint(decoder),
+        decoding.readVarString(decoder)
+    );
+};