feat: Add Sqlx Traits for Signed Type (#1008)

Author: Arvmor

crates/primitives/src/sqlx.rs

@@ -7,6 +7,7 @@
 
 use alloc::{boxed::Box, vec::Vec};
 
+use ruint::support::sqlx::DecodeError;
 use sqlx_core::{
     database::Database,
     decode::Decode,
@@ -15,7 +16,7 @@ use sqlx_core::{
     types::Type,
 };
 
-use crate::FixedBytes;
+use crate::{FixedBytes, Signed};
 
 impl<const BYTES: usize, DB> Type<DB> for FixedBytes<BYTES>
 where
@@ -54,3 +55,38 @@ where
         Self::try_from(bytes.as_slice()).map_err(|e| Box::new(e) as BoxDynError)
     }
 }
+
+impl<const BITS: usize, const LIMBS: usize, DB: Database> Type<DB> for Signed<BITS, LIMBS>
+where
+    Vec<u8>: Type<DB>,
+{
+    fn type_info() -> DB::TypeInfo {
+        <Vec<u8> as Type<DB>>::type_info()
+    }
+
+    fn compatible(ty: &DB::TypeInfo) -> bool {
+        <Vec<u8> as Type<DB>>::compatible(ty)
+    }
+}
+
+impl<'a, const BITS: usize, const LIMBS: usize, DB: Database> Encode<'a, DB> for Signed<BITS, LIMBS>
+where
+    Vec<u8>: Encode<'a, DB>,
+{
+    fn encode_by_ref(
+        &self,
+        buf: &mut <DB as Database>::ArgumentBuffer<'a>,
+    ) -> Result<IsNull, BoxDynError> {
+        self.0.to_be_bytes_vec().encode_by_ref(buf)
+    }
+}
+
+impl<'a, const BITS: usize, const LIMBS: usize, DB: Database> Decode<'a, DB> for Signed<BITS, LIMBS>
+where
+    Vec<u8>: Decode<'a, DB>,
+{
+    fn decode(value: <DB as Database>::ValueRef<'a>) -> Result<Self, BoxDynError> {
+        let bytes = Vec::<u8>::decode(value)?;
+        Self::try_from_be_slice(bytes.as_slice()).ok_or_else(|| DecodeError::Overflow.into())
+    }
+}