use thiserror instead of derive_more for error handling (#10696)

* use thiserror instead of derive_more for error handling

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* Update utils/prometheus/src/lib.rs

* Update utils/prometheus/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

substrate/client/consensus/babe/rpc/Cargo.toml

@@ -19,12 +19,12 @@ jsonrpc-core = "18.0.0"
 jsonrpc-core-client = "18.0.0"
 jsonrpc-derive = "18.0.0"
 sp-consensus-babe = { version = "0.10.0-dev", path = "../../../../primitives/consensus/babe" }
-serde = { version = "1.0.132", features=["derive"] }
+serde = { version = "1.0.132", features = ["derive"] }
 sp-blockchain = { version = "4.0.0-dev", path = "../../../../primitives/blockchain" }
 sp-runtime = { version = "4.1.0-dev", path = "../../../../primitives/runtime" }
 sc-consensus-epochs = { version = "0.10.0-dev", path = "../../epochs" }
 futures = "0.3.16"
-derive_more = "0.99.16"
+thiserror = "1.0"
 sp-api = { version = "4.0.0-dev", path = "../../../../primitives/api" }
 sp-consensus = { version = "0.10.0-dev", path = "../../../../primitives/consensus/common" }
 sp-core = { version = "4.1.0-dev", path = "../../../../primitives/core" }

substrate/client/consensus/babe/rpc/src/lib.rs

@@ -166,11 +166,13 @@ pub struct EpochAuthorship {
 }
 
 /// Errors encountered by the RPC
-#[derive(Debug, derive_more::Display, derive_more::From)]
+#[derive(Debug, thiserror::Error)]
 pub enum Error {
 	/// Consensus error
-	Consensus(ConsensusError),
+	#[error(transparent)]
+	Consensus(#[from] ConsensusError),
 	/// Errors that can be formatted as a String
+	#[error("{0}")]
 	StringError(String),
 }