chore(general): bump MSRV to 1.81, use core::error::Error on no-std compatible crates

.github/workflows/ci.yml

@@ -24,7 +24,7 @@ jobs:
         rust:
           - "stable"
           - "nightly"
-          - "1.79" # MSRV
+          - "1.81" # MSRV
         flags:
           # No features
           - "--no-default-features"
@@ -34,7 +34,7 @@ jobs:
           - "--all-features"
         exclude:
           # All features on MSRV
-          - rust: "1.79" # MSRV
+          - rust: "1.81" # MSRV
             flags: "--all-features"
     steps:
       - uses: actions/checkout@v4
@@ -53,14 +53,14 @@ jobs:
           cache-on-failure: true
       # Only run tests on latest stable and above
       - name: Install cargo-nextest
-        if: ${{ matrix.rust != '1.79' }} # MSRV
+        if: ${{ matrix.rust != '1.81' }} # MSRV
         uses: taiki-e/install-action@nextest
       - name: build
-        if: ${{ matrix.rust == '1.79' }} # MSRV
+        if: ${{ matrix.rust == '1.81' }} # MSRV
         run: cargo build --workspace ${{ matrix.flags }}
       - name: test
         shell: bash
-        if: ${{ matrix.rust != '1.79' }} # MSRV
+        if: ${{ matrix.rust != '1.81' }} # MSRV
         run: cargo nextest run --workspace ${{ matrix.flags }}
 
   doctest:

Cargo.toml

@@ -5,7 +5,7 @@ resolver = "2"
 [workspace.package]
 version = "0.5.4"
 edition = "2021"
-rust-version = "1.79"
+rust-version = "1.81"
 authors = ["Alloy Contributors"]
 license = "MIT OR Apache-2.0"
 homepage = "https://github.com/alloy-rs/alloy"

README.md

@@ -124,7 +124,7 @@ When updating this, also update:
 - .github/workflows/ci.yml
 -->
 
-The current MSRV (minimum supported rust version) is 1.79.
+The current MSRV (minimum supported rust version) is 1.81.
 
 Alloy will keep a rolling MSRV policy of **at least** two versions behind the
 latest stable release (so if the latest stable release is 1.58, we would

clippy.toml

@@ -1 +1 @@
-msrv = "1.79"
+msrv = "1.81"

crates/eips/src/eip1898.rs

@@ -259,8 +259,7 @@ impl Display for HexStringMissingPrefixError {
     }
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for HexStringMissingPrefixError {}
+impl core::error::Error for HexStringMissingPrefixError {}
 
 /// A Block Identifier.
 /// <https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1898.md>
@@ -781,8 +780,7 @@ impl fmt::Display for ParseBlockHashOrNumberError {
     }
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for ParseBlockHashOrNumberError {}
+impl core::error::Error for ParseBlockHashOrNumberError {}
 
 impl FromStr for HashOrNumber {
     type Err = ParseBlockHashOrNumberError;

crates/eips/src/eip4844/trusted_setup_points.rs

@@ -131,5 +131,4 @@ impl fmt::Display for KzgErrors {
     }
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for KzgErrors {}
+impl core::error::Error for KzgErrors {}

crates/rpc-types-engine/src/error.rs

@@ -120,5 +120,4 @@ pub enum PayloadValidationError {
     },
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for PayloadValidationError {}
+impl core::error::Error for PayloadValidationError {}

crates/rpc-types-engine/src/forkchoice.rs

@@ -85,8 +85,7 @@ pub enum ForkchoiceUpdateError {
     UnknownFinalBlock,
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for ForkchoiceUpdateError {}
+impl core::error::Error for ForkchoiceUpdateError {}
 
 #[cfg(feature = "jsonrpsee-types")]
 impl From<ForkchoiceUpdateError> for jsonrpsee_types::error::ErrorObject<'static> {

crates/rpc-types-eth/src/filter.rs

@@ -165,8 +165,7 @@ pub enum FilterBlockError {
     },
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for FilterBlockError {}
+impl core::error::Error for FilterBlockError {}
 
 /// Represents the target range of blocks for the filter
 #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]