diff --git a/crates/chain-connector/src/connector.rs b/crates/chain-connector/src/connector.rs
index 45307f9ff7..fc0beb2944 100644
--- a/crates/chain-connector/src/connector.rs
+++ b/crates/chain-connector/src/connector.rs
@@ -490,9 +490,10 @@ impl ChainConnector {
     }
 
     fn difficulty_params(&self) -> ArrayParams {
-        let data: String = Capacity::difficultyCall {}.abi_encode().encode_hex();
+        let data: String = Core::difficultyCall {}.abi_encode().encode_hex();
+
         rpc_params![
-            json!({"data": data, "to": self.config.cc_contract_address}),
+            json!({"data": data, "to": self.config.core_contract_address}),
             "latest"
         ]
     }
diff --git a/crates/chain-connector/src/function/capacity.rs b/crates/chain-connector/src/function/capacity.rs
index a52761ec46..fa5aba8895 100644
--- a/crates/chain-connector/src/function/capacity.rs
+++ b/crates/chain-connector/src/function/capacity.rs
@@ -24,8 +24,6 @@ sol! {
         /// @dev Capacity commitment is not active
         error CapacityCommitmentIsNotActive(CCStatus status);
 
-        /// @dev Returns the difficulty for randomX
-        function difficulty() external view returns (bytes32);
         function getGlobalNonce() external view returns (bytes32);
 
         /// @dev Returns the min required randomX proofs per epoch for the 1 CU.
diff --git a/crates/chain-connector/src/function/core.rs b/crates/chain-connector/src/function/core.rs
index d3eb79e148..29085b3dab 100644
--- a/crates/chain-connector/src/function/core.rs
+++ b/crates/chain-connector/src/function/core.rs
@@ -16,5 +16,8 @@ sol! {
         /// @dev Returns epoch init timestamp
         /// @return initTimestamp in seconds
         function initTimestamp() external view returns (uint256);
+
+        /// @dev Returns the difficulty for CCP
+        function difficulty() external view returns (bytes32);
     }
 }