diff --git a/client/blockchain-service/src/utils.rs b/client/blockchain-service/src/utils.rs
index b1aabb25f..d532b6ffc 100644
--- a/client/blockchain-service/src/utils.rs
+++ b/client/blockchain-service/src/utils.rs
@@ -525,12 +525,7 @@ where
         Runtime::Extension,
     > {
         let function = function.into();
-        let current_block_hash = client.info().best_hash;
         let current_block = client.info().best_number.saturated_into();
-        let genesis_block = client
-            .hash(0)
-            .expect("Failed to get genesis block hash, always present; qed")
-            .expect("Genesis block hash should never not be on-chain; qed");
         let period = BlockHashCount::get()
             .checked_next_power_of_two()
             .map(|c| c / 2)
@@ -539,13 +534,13 @@ where
         let minimal_extra =
             MinimalExtension::new(generic::Era::mortal(period, current_block), nonce, tip);
         let extra: Runtime::Extension = Runtime::Extension::from_minimal_extension(minimal_extra);
-        let implicit =
-            <Runtime::Extension as ExtensionOperations<Runtime::Call, Runtime>>::implicit(
-                genesis_block,
-                current_block_hash,
-            );
 
-        let raw_payload = SignedPayload::from_raw(function.clone(), extra.clone(), implicit);
+        let raw_payload = SignedPayload::new(function.clone(), extra.clone())
+            .map_err(|e| {
+                error!(target: LOG_TARGET, "Failed to create signed payload: {:?}", e);
+                e
+            })
+            .expect("Creating a signed payload should always work. Implicit data should always be available.");
 
         let caller_pub_key = Self::caller_pub_key(self.keystore.clone());
 
@@ -619,9 +614,12 @@ where
         // Each event record is composed of the `phase`, `event` and `topics` fields.
         // We are interested in those events whose `phase` is equal to `ApplyExtrinsic` with the index of the extrinsic.
         // For more information see: https://polkadot.js.org/docs/api/cookbook/blocks/#how-do-i-map-extrinsics-to-their-events
+        let extrinsic_index_u32: u32 = extrinsic_index
+            .try_into()
+            .expect("Extrinsic index should always be a valid u32; qed");
         let events = events_in_block
             .into_iter()
-            .filter(|ev| ev.phase == frame_system::Phase::ApplyExtrinsic(extrinsic_index as u32))
+            .filter(|ev| ev.phase == frame_system::Phase::ApplyExtrinsic(extrinsic_index_u32))
             .collect();
 
         // Construct the extrinsic.
diff --git a/client/common/src/traits.rs b/client/common/src/traits.rs
index 912fcf86d..80b48ce73 100644
--- a/client/common/src/traits.rs
+++ b/client/common/src/traits.rs
@@ -493,20 +493,4 @@ pub trait ExtensionOperations<
     /// # Returns
     /// A fully constructed extension ready for use in transaction signing
     fn from_minimal_extension(minimal: MinimalExtension) -> Self;
-
-    /// Generates the implicit data required by this extension.
-    ///
-    /// Implicit data is information that is not explicitly included in the
-    /// transaction but is required for validation. This typically includes:
-    /// - The genesis block hash (for chain identification)
-    /// - The current block hash (for mortality checks)
-    /// - Runtime version information
-    ///
-    /// # Parameters
-    /// - `genesis_block_hash`: The hash of the genesis block
-    /// - `current_block_hash`: The hash of the current block
-    ///
-    /// # Returns
-    /// The implicit data structure required by this extension type
-    fn implicit(genesis_block_hash: Self::Hash, current_block_hash: Self::Hash) -> Self::Implicit;
 }
diff --git a/runtime/parachain/src/configs/storage_hub.rs b/runtime/parachain/src/configs/storage_hub.rs
index 0339ed2ae..1d1cd6ae4 100644
--- a/runtime/parachain/src/configs/storage_hub.rs
+++ b/runtime/parachain/src/configs/storage_hub.rs
@@ -36,21 +36,6 @@ impl ExtensionOperations<crate::RuntimeCall, crate::Runtime> for crate::SignedEx
             frame_metadata_hash_extension::CheckMetadataHash::new(false),
         )
     }
-
-    fn implicit(genesis_block_hash: Self::Hash, current_block_hash: Self::Hash) -> Self::Implicit {
-        (
-            (),
-            crate::VERSION.spec_version,
-            crate::VERSION.transaction_version,
-            genesis_block_hash,
-            current_block_hash,
-            (),
-            (),
-            (),
-            (),
-            None,
-        )
-    }
 }
 
 // Map the runtime event into the client-facing storage events enum.
diff --git a/runtime/solochain-evm/src/configs/storage_hub.rs b/runtime/solochain-evm/src/configs/storage_hub.rs
index 714a1a539..4cf494e56 100644
--- a/runtime/solochain-evm/src/configs/storage_hub.rs
+++ b/runtime/solochain-evm/src/configs/storage_hub.rs
@@ -34,20 +34,6 @@ impl ExtensionOperations<crate::RuntimeCall, crate::Runtime> for crate::TxExtens
             frame_metadata_hash_extension::CheckMetadataHash::new(false),
         )
     }
-
-    fn implicit(genesis_block_hash: Self::Hash, current_block_hash: Self::Hash) -> Self::Implicit {
-        (
-            (),
-            crate::VERSION.spec_version,
-            crate::VERSION.transaction_version,
-            genesis_block_hash,
-            current_block_hash,
-            (),
-            (),
-            (),
-            None,
-        )
-    }
 }
 
 // Map the runtime event into the client-facing storage events enum.