diff --git a/crypto/src/signature/mod.rs b/crypto/src/signature/mod.rs
index 790e130efff..e0aeb0925fa 100644
--- a/crypto/src/signature/mod.rs
+++ b/crypto/src/signature/mod.rs
@@ -40,6 +40,7 @@ ffi::ffi_item! {
     #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, getset::Getters)]
     #[cfg_attr(not(feature="ffi_import"), derive(derive_more::DebugCustom, Hash, Decode, Encode, Deserialize, Serialize, IntoSchema))]
     #[cfg_attr(not(feature="ffi_import"), debug(fmt = "{{ {} }}", "hex::encode_upper(payload)"))]
+    #[serde(transparent)]
     pub struct Signature {
         #[serde_as(as = "serde_with::hex::Hex<serde_with::formats::Uppercase>")]
         payload: ConstVec<u8>
@@ -283,9 +284,7 @@ mod tests {
 
     #[test]
     fn signature_serialized_representation() {
-        let input = json!({
-            "payload": "3A7991AF1ABB77F3FD27CC148404A6AE4439D095A63591B77C788D53F708A02A1509A611AD6D97B01D871E58ED00C8FD7C3917B6CA61A8C2833A19E000AAC2E4"
-        });
+        let input = json!("3A7991AF1ABB77F3FD27CC148404A6AE4439D095A63591B77C788D53F708A02A1509A611AD6D97B01D871E58ED00C8FD7C3917B6CA61A8C2833A19E000AAC2E4");
 
         let signature: Signature = serde_json::from_value(input.clone()).unwrap();
 
diff --git a/data_model/src/block.rs b/data_model/src/block.rs
index 04296c13033..1cbfeb543e0 100644
--- a/data_model/src/block.rs
+++ b/data_model/src/block.rs
@@ -9,7 +9,7 @@ use alloc::{boxed::Box, format, string::String, vec, vec::Vec};
 use core::{fmt::Display, time::Duration};
 
 use derive_more::Display;
-use iroha_crypto::{HashOf, MerkleTree, PrivateKey, SignatureOf};
+use iroha_crypto::{HashOf, MerkleTree, PrivateKey, Signature, SignatureOf};
 use iroha_data_model_derive::model;
 use iroha_macro::FromVariant;
 use iroha_schema::IntoSchema;
@@ -305,6 +305,18 @@ impl SignedBlock {
     }
 }
 
+impl BlockSignature {
+    /// Peer topology index
+    pub fn index(&self) -> u64 {
+        self.0
+    }
+
+    /// Signature itself
+    pub fn payload(&self) -> &Signature {
+        &self.1
+    }
+}
+
 mod candidate {
     #[cfg(not(feature = "std"))]
     use alloc::collections::BTreeSet;
diff --git a/data_model/src/transaction.rs b/data_model/src/transaction.rs
index cc55718e155..eb0a70aa7dc 100644
--- a/data_model/src/transaction.rs
+++ b/data_model/src/transaction.rs
@@ -11,7 +11,7 @@ use core::{
 use derive_more::{DebugCustom, Display};
 #[cfg(feature = "http")]
 pub use http::*;
-use iroha_crypto::SignatureOf;
+use iroha_crypto::{Signature, SignatureOf};
 use iroha_data_model_derive::model;
 use iroha_macro::FromVariant;
 use iroha_schema::IntoSchema;
@@ -315,6 +315,13 @@ impl AsRef<SignedTransaction> for CommittedTransaction {
     }
 }
 
+impl TransactionSignature {
+    /// Signature itself
+    pub fn payload(&self) -> &Signature {
+        &self.0
+    }
+}
+
 mod candidate {
     use parity_scale_codec::Input;
 
diff --git a/primitives/numeric/src/lib.rs b/primitives/numeric/src/lib.rs
index c33592deb65..dc27d04fd62 100644
--- a/primitives/numeric/src/lib.rs
+++ b/primitives/numeric/src/lib.rs
@@ -324,6 +324,12 @@ impl NumericSpec {
     pub const fn fractional(scale: u32) -> Self {
         Self { scale: Some(scale) }
     }
+
+    /// Get the scale
+    #[inline]
+    pub const fn scale(&self) -> Option<u32> {
+        self.scale
+    }
 }
 
 impl core::str::FromStr for Numeric {