Storage tracing (#3614)

* Storage tracing

* Whitepsaces

Co-Authored-By: Sergei Pepyakin <sergei@parity.io>

* Apply suggestions from code review

Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com>

* Update Cargo.lock

substrate/core/primitives/src/hexdisplay.rs

@@ -21,28 +21,37 @@ pub struct HexDisplay<'a>(&'a [u8]);
 
 impl<'a> HexDisplay<'a> {
 	/// Create new instance that will display `d` as a hex string when displayed.
-	pub fn from(d: &'a dyn AsBytesRef) -> Self { HexDisplay(d.as_bytes_ref()) }
+	pub fn from<R: AsBytesRef>(d: &'a R) -> Self { HexDisplay(d.as_bytes_ref()) }
 }
 
 impl<'a> ::core::fmt::Display for HexDisplay<'a> {
-	fn fmt(&self, fmtr: &mut ::core::fmt::Formatter) -> Result<(), ::core::fmt::Error> {
+	fn fmt(&self, f: &mut core::fmt::Formatter) -> Result<(), core::fmt::Error> {
 		if self.0.len() < 1027 {
 			for byte in self.0 {
-				fmtr.write_fmt(format_args!("{:02x}", byte))?;
+				f.write_fmt(format_args!("{:02x}", byte))?;
 			}
 		} else {
 			for byte in &self.0[0..512] {
-				fmtr.write_fmt(format_args!("{:02x}", byte))?;
+				f.write_fmt(format_args!("{:02x}", byte))?;
 			}
-			fmtr.write_str("...")?;
+			f.write_str("...")?;
 			for byte in &self.0[self.0.len() - 512..] {
-				fmtr.write_fmt(format_args!("{:02x}", byte))?;
+				f.write_fmt(format_args!("{:02x}", byte))?;
 			}
 		}
 		Ok(())
 	}
 }
 
+impl<'a> core::fmt::Debug for HexDisplay<'a> {
+	fn fmt(&self, f: &mut core::fmt::Formatter) -> Result<(), core::fmt::Error> {
+		for byte in self.0 {
+			f.write_fmt(format_args!("{:02x}", byte))?;
+		}
+		Ok(())
+	}
+}
+
 /// Simple trait to transform various types to `&[u8]`
 pub trait AsBytesRef {
 	/// Transform `self` into `&[u8]`.

substrate/core/primitives/src/lib.rs

@@ -159,7 +159,7 @@ pub enum NativeOrEncoded<R> {
 #[cfg(feature = "std")]
 impl<R: codec::Encode> ::std::fmt::Debug for NativeOrEncoded<R> {
 	fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
-		self.as_encoded().as_ref().fmt(f)
+		hexdisplay::HexDisplay::from(&self.as_encoded().as_ref()).fmt(f)
 	}
 }