diff --git a/src/MultiSigContractV2.sol b/src/MultiSigContractV2.sol
index 2266468..43b52f2 100644
--- a/src/MultiSigContractV2.sol
+++ b/src/MultiSigContractV2.sol
@@ -130,6 +130,14 @@ contract MultiSigContractV2 is Ownable, ReentrancyGuard, Pausable {
     mapping(uint256 => address[]) public transactionSigners;
     mapping(uint256 => address[]) public transactionSignatures;
 
+    /// @notice Signer management
+    mapping(address => SignerInfo) public signerInfo;
+    EnumerableSet.AddressSet private activeSigners;
+
+    /// @notice Attestation tracking
+    mapping(address => mapping(uint256 => uint64)) public signerToAttestationId;
+    mapping(uint256 => uint64[]) public transactionAttestations;
+
     ////////////////////
     // Constructor //
     ////////////////////