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/finality-grandpa/src/authorities.rs

@@ -32,23 +32,22 @@ use sp_finality_grandpa::{AuthorityId, AuthorityList};
 use crate::SetId;
 
 /// Error type returned on operations on the `AuthoritySet`.
-#[derive(Debug, derive_more::Display)]
+#[derive(Debug, thiserror::Error)]
 pub enum Error<N, E> {
-	#[display(fmt = "Invalid authority set, either empty or with an authority weight set to 0.")]
+	#[error("Invalid authority set, either empty or with an authority weight set to 0.")]
 	InvalidAuthoritySet,
-	#[display(fmt = "Client error during ancestry lookup: {}", _0)]
+	#[error("Client error during ancestry lookup: {0}")]
 	Client(E),
-	#[display(fmt = "Duplicate authority set change.")]
+	#[error("Duplicate authority set change.")]
 	DuplicateAuthoritySetChange,
-	#[display(fmt = "Multiple pending forced authority set changes are not allowed.")]
+	#[error("Multiple pending forced authority set changes are not allowed.")]
 	MultiplePendingForcedAuthoritySetChanges,
-	#[display(
-		fmt = "A pending forced authority set change could not be applied since it must be applied \
-		after the pending standard change at #{}",
-		_0
+	#[error(
+		"A pending forced authority set change could not be applied since it must be applied \
+		after the pending standard change at #{0}"
 	)]
 	ForcedAuthoritySetChangeDependencyUnsatisfied(N),
-	#[display(fmt = "Invalid operation in the pending changes tree: {}", _0)]
+	#[error("Invalid operation in the pending changes tree: {0}")]
 	ForkTree(fork_tree::Error<E>),
 }
 

substrate/client/finality-grandpa/src/finality_proof.rs

@@ -132,17 +132,18 @@ pub struct FinalityProof<Header: HeaderT> {
 }
 
 /// Errors occurring when trying to prove finality
-#[derive(Debug, derive_more::Display, derive_more::From)]
+#[derive(Debug, thiserror::Error)]
 pub enum FinalityProofError {
 	/// The requested block has not yet been finalized.
-	#[display(fmt = "Block not yet finalized")]
+	#[error("Block not yet finalized")]
 	BlockNotYetFinalized,
 	/// The requested block is not covered by authority set changes. Likely this means the block is
 	/// in the latest authority set, and the subscription API is more appropriate.
-	#[display(fmt = "Block not covered by authority set changes")]
+	#[error("Block not covered by authority set changes")]
 	BlockNotInAuthoritySetChanges,
 	/// Errors originating from the client.
-	Client(sp_blockchain::Error),
+	#[error(transparent)]
+	Client(#[from] sp_blockchain::Error),
 }
 
 fn prove_finality<Block, B>(

substrate/client/finality-grandpa/src/warp_proof.rs

@@ -34,26 +34,25 @@ use sp_runtime::{
 use std::{collections::HashMap, sync::Arc};
 
 /// Warp proof processing error.
-#[derive(Debug, derive_more::Display, derive_more::From)]
+#[derive(Debug, thiserror::Error)]
 pub enum Error {
 	/// Decoding error.
-	#[display(fmt = "Failed to decode block hash: {}.", _0)]
-	DecodeScale(codec::Error),
+	#[error("Failed to decode block hash: {0}.")]
+	DecodeScale(#[from] codec::Error),
 	/// Client backend error.
-	Client(sp_blockchain::Error),
+	#[error("{0}")]
+	Client(#[from] sp_blockchain::Error),
 	/// Invalid request data.
-	#[from(ignore)]
+	#[error("{0}")]
 	InvalidRequest(String),
 	/// Invalid warp proof.
-	#[from(ignore)]
+	#[error("{0}")]
 	InvalidProof(String),
 	/// Missing header or authority set change data.
-	#[display(fmt = "Missing required data to be able to answer request.")]
+	#[error("Missing required data to be able to answer request.")]
 	MissingData,
 }
 
-impl std::error::Error for Error {}
-
 /// The maximum size in bytes of the `WarpSyncProof`.
 pub(super) const MAX_WARP_SYNC_PROOF_SIZE: usize = 8 * 1024 * 1024;