Add parity scale codec

Cargo.toml

@@ -22,6 +22,9 @@ build = "build.rs"
 all-features = true
 
 [dependencies]
+parity-scale-codec = {package = "parity-scale-codec", optional = true, version = "3.1.5", features = ["max-encoded-len"], default-features = false}
+parity-scale-codec-derive = {package = "parity-scale-codec-derive", optional = true, version = "3.1.3",default-features = false}
+scale-info = {optional=true, version = "2.1.2", features = ["derive"],default-features = false}
 arbitrary = { default-features = false, optional = true, version = "1.0" }
 arrayvec = { default-features = false, version = "0.7" }
 borsh = { default-features = false, optional = true, version = "0.9.3" }
@@ -78,6 +81,7 @@ serde-with-float = ["serde"]
 serde-with-str = ["serde"]
 std = []
 tokio-pg = ["db-tokio-postgres"] # Backwards compatability
+scale-codec =  ["parity-scale-codec-derive","parity-scale-codec","scale-info"]
 
 [workspace]
 members = [".", "./macros"]

src/decimal.rs

@@ -30,6 +30,10 @@ use num_traits::float::FloatCore;
 use num_traits::{FromPrimitive, Num, One, Signed, ToPrimitive, Zero};
 #[cfg(feature = "rkyv")]
 use rkyv::{Archive, Deserialize, Serialize};
+#[cfg(feature = "scale-codec")]
+use parity_scale_codec_derive::{Decode,Encode, MaxEncodedLen};
+#[cfg(feature = "scale-codec")]
+use scale_info::TypeInfo;
 
 /// The smallest value that can be represented by this decimal type.
 const MIN: Decimal = Decimal {
@@ -124,6 +128,10 @@ pub struct UnpackedDecimal {
     archive_attr(derive(Clone, Copy, Debug))
 )]
 #[cfg_attr(feature = "rkyv-safe", archive_attr(derive(CheckBytes)))]
+#[cfg_attr(
+feature = "scale-codec",
+derive(Decode, Encode, TypeInfo, MaxEncodedLen),
+)]
 pub struct Decimal {
     // Bits 0-15: unused
     // Bits 16-23: Contains "e", a value between 0-28 that indicates the scale
@@ -548,7 +556,7 @@ impl Decimal {
     }
 
     #[must_use]
-    pub(crate) const fn from_parts_raw(lo: u32, mid: u32, hi: u32, flags: u32) -> Decimal {
+    pub const fn from_parts_raw(lo: u32, mid: u32, hi: u32, flags: u32) -> Decimal {
         if lo == 0 && mid == 0 && hi == 0 {
             Decimal {
                 lo,