1 files changed, 35 insertions, 0 deletions
diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 0000000..b06d023
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,35 @@
+use data_encoding;
+use serde::de;
+
+use std::fmt::Display;
+use std::io;
+use std::string;
+
+error_chain! {
+    errors { 
+        Custom(msg: String)
+        Unsupported
+    }
+
+    foreign_links {
+        Decoding(data_encoding::decode::Error);
+        Io(io::Error);
+        Utf8(string::FromUtf8Error);
+    }
+}
+
+impl Error {
+    /// Generate error to show top-level type cannot be deserialized.
+    pub fn top_level(object: &'static str) -> Error {
+        ErrorKind::Custom(format!("cannot deserialize {} at the top level.\
+                           Try deserializing into a struct.", object)).into()
+
+    }
+}
+
+impl de::Error for Error {
+    fn custom<T>(msg: T) -> Self 
+        where T: Display {
+            ErrorKind::Custom(msg.to_string()).into()
+    }
+}
+\ No newline at end of file