Implement SerializeValue and DeserializeValue for Blake2bHash

Author: stanislav-tkach

rust/catalyst-types/src/hashes.rs

@@ -5,6 +5,10 @@ use std::{fmt, str::FromStr};
 use blake2b_simd::Params;
 use displaydoc::Display;
 use pallas_crypto::hash::Hash;
+use scylla::_macro_internal::{
+    CellWriter, ColumnType, DeserializationError, DeserializeValue, FrameSlice, SerializationError,
+    SerializeValue, TypeCheckError, WrittenCellProof,
+};
 use thiserror::Error;
 
 /// Number of bytes in a blake2b 224 hash.
@@ -165,6 +169,29 @@ impl<'a, C, const BYTES: usize> minicbor::Decode<'a, C> for Blake2bHash<BYTES> {
     }
 }
 
+impl<const BYTES: usize> SerializeValue for Blake2bHash<BYTES> {
+    fn serialize<'b>(
+        &self, typ: &ColumnType, writer: CellWriter<'b>,
+    ) -> Result<WrittenCellProof<'b>, SerializationError> {
+        self.0.as_ref().serialize(typ, writer)
+    }
+}
+
+impl<'frame, 'metadata, const BYTES: usize> DeserializeValue<'frame, 'metadata>
+    for Blake2bHash<BYTES>
+{
+    fn type_check(typ: &ColumnType) -> Result<(), TypeCheckError> {
+        <Vec<u8>>::type_check(typ)
+    }
+
+    fn deserialize(
+        typ: &'metadata ColumnType<'metadata>, v: Option<FrameSlice<'frame>>,
+    ) -> Result<Self, DeserializationError> {
+        let bytes = <Vec<u8>>::deserialize(typ, v)?;
+        Self::try_from(bytes).map_err(DeserializationError::new)
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;