Removed libp2p from sc-authority-discovery

substrate/client/network/types/src/rec.rs

@@ -18,6 +18,8 @@
 
 use std::{
     borrow::Borrow,
+    error::Error,
+    fmt,
 	time:: Instant,
 };
 use bytes::Bytes;
@@ -138,5 +140,43 @@ impl From<libp2p_kad::PeerRecord> for PeerRecord {
         PeerRecord {peer, record}
 
 
+    }
+}
+
+/// An error during signing of a message.
+#[derive(Debug)]
+pub struct SigningError {
+    msg: String,
+    source: Option<Box<dyn Error + Send + Sync>>,
+}
+
+/// An error during encoding of key material.
+impl SigningError {
+    #[cfg(all(not(target_arch = "wasm32")))]
+    pub(crate) fn new<S: ToString>(msg: S) -> Self {
+        Self {
+            msg: msg.to_string(),
+            source: None,
+        }
+    }
+
+    #[cfg(all(not(target_arch = "wasm32")))]
+    pub(crate) fn source(self, source: impl Error + Send + Sync + 'static) -> Self {
+        Self {
+            source: Some(Box::new(source)),
+            ..self
+        }
+    }
+}
+
+impl fmt::Display for SigningError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "Key signing error: {}", self.msg)
+    }
+}
+
+impl Error for SigningError {
+    fn source(&self) -> Option<&(dyn Error + 'static)> {
+        self.source.as_ref().map(|s| &**s as &dyn Error)
     }
 }