Basic errors

src/error.rs

@@ -0,0 +1,34 @@
+
+pub enum ErrorKind {
+    InvalidEndpoint,
+    JsonParseError,
+}
+
+pub struct Error {
+    kind: ErrorKind,
+}
+
+impl Error {
+    pub fn new(kind: ErrorKind) -> Error {
+        Error {
+            kind,
+        }
+    }
+}
+
+impl From<serde_json::Error> for Error {
+    fn from(_: serde_json::Error) -> Self {
+        Error {
+            kind: ErrorKind::JsonParseError,
+        }
+    }
+}
+
+impl ToString for Error {
+    fn to_string(&self) -> String {
+        match self.kind {
+            ErrorKind::InvalidEndpoint => "invalid endpoint",
+            ErrorKind::JsonParseError => "JSON parse error",
+        }.to_string()
+    }
+}