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/test-utils/client/Cargo.toml

@@ -12,10 +12,10 @@ publish = false
 targets = ["x86_64-unknown-linux-gnu"]
 
 [dependencies]
+array-bytes = "4.1"
 async-trait = "0.1.57"
 codec = { package = "parity-scale-codec", version = "3.0.0" }
 futures = "0.3.21"
-hex = "0.4"
 serde = "1.0.136"
 serde_json = "1.0.85"
 sc-client-api = { version = "4.0.0-dev", path = "../../client/api" }

substrate/test-utils/client/src/lib.rs

@@ -346,7 +346,7 @@ impl RpcHandlersExt for RpcHandlers {
 						"params": ["0x{}"],
 						"id": 0
 					}}"#,
-				hex::encode(extrinsic.encode())
+				array_bytes::bytes2hex("", &extrinsic.encode())
 			))
 			.await
 			.expect("valid JSON-RPC request object; qed");