Use array-bytes for All Array/Bytes/Hex Operations (#12190)

* Use `array-bytes` for All Array/Bytes/Hex Operations

Signed-off-by: Xavier Lau <xavier@inv.cafe>

* Reorder

* Self Review

* Format

* Fix Tests

* Bump `array-bytes`

* Optimize large test res

Signed-off-by: Xavier Lau <xavier@inv.cafe>
Co-authored-by: parity-processbot <>

substrate/bin/node/bench/Cargo.toml

@@ -11,6 +11,7 @@ repository = "https://github.com/paritytech/substrate/"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+array-bytes = "4.1"
 clap = { version = "3.1.18", features = ["derive"] }
 log = "0.4.17"
 node-primitives = { version = "2.0.0", path = "../primitives" }
@@ -34,7 +35,6 @@ sp-tracing = { version = "5.0.0", path = "../../../primitives/tracing" }
 hash-db = "0.15.2"
 tempfile = "3.1.0"
 fs_extra = "1"
-hex = "0.4.0"
 rand = { version = "0.7.2", features = ["small_rng"] }
 lazy_static = "1.4.0"
 parity-util-mem = { version = "0.11.0", default-features = false, features = ["primitive-types"] }

substrate/bin/node/bench/src/generator.rs

@@ -37,8 +37,10 @@ pub fn generate_trie(
 	let (db, overlay) = {
 		let mut overlay = HashMap::new();
 		overlay.insert(
-			hex::decode("03170a2e7597b7b7e3d84c05391d139a62b157e78786d8c082f29dcf4c111314")
-				.expect("null key is valid"),
+			array_bytes::hex2bytes(
+				"03170a2e7597b7b7e3d84c05391d139a62b157e78786d8c082f29dcf4c111314",
+			)
+			.expect("null key is valid"),
 			Some(vec![0]),
 		);
 		let mut trie = SimpleTrie { db, overlay: &mut overlay };