feat: properly encapsulate quick_protobuf::Error

I noticed that we also still leak that dependency in several crates by providing a `From` impl so I've removed that one as well.

Resolves #3534.

Pull-Request: #3894.

core/src/lib.rs

@@ -47,8 +47,6 @@ mod proto {
 
 /// Multi-address re-export.
 pub use multiaddr;
-use std::fmt;
-use std::fmt::Formatter;
 pub type Negotiated<T> = multistream_select::Negotiated<T>;
 
 #[deprecated(since = "0.39.0", note = "Depend on `libp2p-identity` instead.")]
@@ -130,16 +128,5 @@ pub use transport::Transport;
 pub use upgrade::{InboundUpgrade, OutboundUpgrade, UpgradeError, UpgradeInfo};
 
 #[derive(Debug, thiserror::Error)]
-pub struct DecodeError(String);
-
-impl From<quick_protobuf::Error> for DecodeError {
-    fn from(e: quick_protobuf::Error) -> Self {
-        Self(e.to_string())
-    }
-}
-
-impl fmt::Display for DecodeError {
-    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
-        write!(f, "{}", self.0)
-    }
-}
+#[error(transparent)]
+pub struct DecodeError(quick_protobuf::Error);

core/src/peer_record.rs

@@ -36,8 +36,7 @@ impl PeerRecord {
         let (payload, signing_key) =
             envelope.payload_and_signing_key(String::from(DOMAIN_SEP), PAYLOAD_TYPE.as_bytes())?;
         let mut reader = BytesReader::from_bytes(payload);
-        let record =
-            proto::PeerRecord::from_reader(&mut reader, payload).map_err(DecodeError::from)?;
+        let record = proto::PeerRecord::from_reader(&mut reader, payload).map_err(DecodeError)?;
 
         let peer_id = PeerId::from_bytes(&record.peer_id)?;
 

core/src/signed_envelope.rs

@@ -97,8 +97,7 @@ impl SignedEnvelope {
         use quick_protobuf::MessageRead;
 
         let mut reader = BytesReader::from_bytes(bytes);
-        let envelope =
-            proto::Envelope::from_reader(&mut reader, bytes).map_err(DecodeError::from)?;
+        let envelope = proto::Envelope::from_reader(&mut reader, bytes).map_err(DecodeError)?;
 
         Ok(Self {
             key: PublicKey::try_decode_protobuf(&envelope.public_key)?,

transports/noise/src/io/handshake.rs

@@ -28,7 +28,7 @@ mod proto {
 
 use crate::io::{framed::NoiseFramed, Output};
 use crate::protocol::{KeypairIdentity, STATIC_KEY_DOMAIN};
-use crate::Error;
+use crate::{DecodeError, Error};
 use bytes::Bytes;
 use futures::prelude::*;
 use libp2p_identity as identity;
@@ -140,7 +140,8 @@ where
 {
     let msg = recv(state).await?;
     let mut reader = BytesReader::from_bytes(&msg[..]);
-    let pb = proto::NoiseHandshakePayload::from_reader(&mut reader, &msg[..])?;
+    let pb =
+        proto::NoiseHandshakePayload::from_reader(&mut reader, &msg[..]).map_err(DecodeError)?;
 
     state.id_remote_pubkey = Some(identity::PublicKey::try_decode_protobuf(&pb.identity_key)?);
 

transports/noise/src/lib.rs

@@ -69,8 +69,6 @@ use libp2p_core::{InboundUpgrade, OutboundUpgrade, UpgradeInfo};
 use libp2p_identity as identity;
 use libp2p_identity::PeerId;
 use snow::params::NoiseParams;
-use std::fmt;
-use std::fmt::Formatter;
 use std::pin::Pin;
 
 /// The configuration for the noise handshake.
@@ -211,29 +209,12 @@ pub enum Error {
     BadSignature,
     #[error("Authentication failed")]
     AuthenticationFailed,
-    #[error(transparent)]
-    InvalidPayload(DecodeError),
+    #[error("failed to decode protobuf ")]
+    InvalidPayload(#[from] DecodeError),
     #[error(transparent)]
     SigningError(#[from] libp2p_identity::SigningError),
 }
 
 #[derive(Debug, thiserror::Error)]
-pub struct DecodeError(String);
-
-impl fmt::Display for DecodeError {
-    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
-        write!(f, "{}", self.0)
-    }
-}
-
-impl From<quick_protobuf::Error> for DecodeError {
-    fn from(e: quick_protobuf::Error) -> Self {
-        Self(e.to_string())
-    }
-}
-
-impl From<quick_protobuf::Error> for Error {
-    fn from(e: quick_protobuf::Error) -> Self {
-        Error::InvalidPayload(e.into())
-    }
-}
+#[error(transparent)]
+pub struct DecodeError(quick_protobuf::Error);

transports/plaintext/src/error.rs

@@ -41,7 +41,7 @@ pub enum PlainTextError {
 }
 
 #[derive(Debug)]
-pub struct DecodeError(quick_protobuf::Error);
+pub struct DecodeError(pub(crate) quick_protobuf::Error);
 
 impl fmt::Display for DecodeError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
@@ -87,9 +87,9 @@ impl From<IoError> for PlainTextError {
     }
 }
 
-impl From<quick_protobuf::Error> for PlainTextError {
-    fn from(err: quick_protobuf::Error) -> PlainTextError {
-        PlainTextError::InvalidPayload(DecodeError(err))
+impl From<DecodeError> for PlainTextError {
+    fn from(err: DecodeError) -> PlainTextError {
+        PlainTextError::InvalidPayload(err)
     }
 }
 

transports/plaintext/src/handshake.rs

@@ -18,7 +18,7 @@
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 // DEALINGS IN THE SOFTWARE.
 
-use crate::error::PlainTextError;
+use crate::error::{DecodeError, PlainTextError};
 use crate::proto::Exchange;
 use crate::PlainText2Config;
 
@@ -74,7 +74,7 @@ impl HandshakeContext<Local> {
         exchange_bytes: BytesMut,
     ) -> Result<HandshakeContext<Remote>, PlainTextError> {
         let mut reader = BytesReader::from_bytes(&exchange_bytes);
-        let prop = Exchange::from_reader(&mut reader, &exchange_bytes)?;
+        let prop = Exchange::from_reader(&mut reader, &exchange_bytes).map_err(DecodeError)?;
 
         let public_key = PublicKey::try_decode_protobuf(&prop.pubkey.unwrap_or_default())?;
         let peer_id = PeerId::from_bytes(&prop.id.unwrap_or_default())?;