feat: switch all std::error to core::error (#815)

Cargo.toml

@@ -90,8 +90,9 @@ bytes = { version = "1", default-features = false }
 criterion = "0.5"
 derive_arbitrary = "1.3"
 getrandom = "0.2"
-hex = { package = "const-hex", version = "1.10", default-features = false, features = [
+hex = { package = "const-hex", version = "1.14", default-features = false, features = [
     "alloc",
+    "core-error",
 ] }
 itoa = "1"
 once_cell = "1"

crates/dyn-abi/src/error.rs

@@ -98,10 +98,9 @@ impl From<alloc::collections::TryReserveError> for Error {
     }
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for Error {
+impl core::error::Error for Error {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+    fn source(&self) -> Option<&(dyn core::error::Error + 'static)> {
         match self {
             Self::Hex(e) => Some(e),
             Self::TypeParser(e) => Some(e),

crates/primitives/src/bits/address.rs

@@ -22,13 +22,13 @@ impl From<hex::FromHexError> for AddressError {
     }
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for AddressError {
+impl core::error::Error for AddressError {
     #[inline]
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+    fn source(&self) -> Option<&(dyn core::error::Error + 'static)> {
         match self {
+            #[cfg(any(feature = "std", not(feature = "hex-compat")))]
             Self::Hex(err) => Some(err),
-            Self::InvalidChecksum => None,
+            _ => None,
         }
     }
 }

crates/primitives/src/signature/error.rs

@@ -31,12 +31,12 @@ impl From<hex::FromHexError> for SignatureError {
     }
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for SignatureError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+impl core::error::Error for SignatureError {
+    fn source(&self) -> Option<&(dyn core::error::Error + 'static)> {
         match self {
-            #[cfg(feature = "k256")]
+            #[cfg(all(feature = "k256", feature = "std"))]
             Self::K256(e) => Some(e),
+            #[cfg(any(feature = "std", not(feature = "hex-compat")))]
             Self::FromHex(e) => Some(e),
             _ => None,
         }

crates/primitives/src/signed/errors.rs

@@ -25,12 +25,12 @@ impl From<ruint::ParseError> for ParseSignedError {
     }
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for ParseSignedError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+impl core::error::Error for ParseSignedError {
+    fn source(&self) -> Option<&(dyn core::error::Error + 'static)> {
         match self {
+            #[cfg(feature = "std")]
             Self::Ruint(err) => Some(err),
-            Self::IntegerOverflow => None,
+            _ => None,
         }
     }
 }

crates/primitives/src/utils/units.rs

@@ -98,9 +98,8 @@ pub enum UnitsError {
     ParseSigned(ParseSignedError),
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for UnitsError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+impl core::error::Error for UnitsError {
+    fn source(&self) -> Option<&(dyn core::error::Error + 'static)> {
         match self {
             Self::InvalidUnit(_) => None,
             Self::ParseSigned(e) => Some(e),

crates/sol-types/src/errors.rs

@@ -74,9 +74,8 @@ pub enum Error {
     Other(Cow<'static, str>),
 }
 
-#[cfg(feature = "std")]
-impl std::error::Error for Error {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+impl core::error::Error for Error {
+    fn source(&self) -> Option<&(dyn core::error::Error + 'static)> {
         match self {
             Self::Reserve(e) => Some(e),
             Self::FromHexError(e) => Some(e),