diff --git a/contracts/mainnet/DepositBoxes/IDepositBoxERC20.sol b/contracts/mainnet/DepositBoxes/IDepositBoxERC20.sol
index bb54561..8e7ad73 100644
--- a/contracts/mainnet/DepositBoxes/IDepositBoxERC20.sol
+++ b/contracts/mainnet/DepositBoxes/IDepositBoxERC20.sol
@@ -45,9 +45,9 @@ interface IDepositBoxERC20 is IDepositBox {
     function stopTrustingReceiver(string calldata schainName, address receiver) external;
     function trustReceiver(string calldata schainName, address receiver) external;
     function validateTransfer(uint transferId) external;
-    function isReceiverTrusted(bytes32 schainHash, address receiver) external view returns (bool);
-    function getArbitrageDuration(bytes32 schainHash) external view returns (uint256);
-    function getBigTransferThreshold(bytes32 schainHash, address token) external view returns (uint256);
+    function isReceiverTrusted(SchainHash schainHash, address receiver) external view returns (bool);
+    function getArbitrageDuration(SchainHash schainHash) external view returns (uint256);
+    function getBigTransferThreshold(SchainHash schainHash, address token) external view returns (uint256);
     function getDelayedAmount(address receiver, address token) external view returns (uint256 value);
     function getNextUnlockTimestamp(address receiver, address token) external view returns (uint256 unlockTimestamp);
     function getSchainToERC20(string calldata schainName, address erc20OnMainnet) external view returns (bool);
@@ -60,7 +60,7 @@ interface IDepositBoxERC20 is IDepositBox {
         external
         view
         returns (address[] memory);
-    function getTimeDelay(bytes32 schainHash) external view returns (uint256);
+    function getTimeDelay(SchainHash schainHash) external view returns (uint256);
     function getTrustedReceiver(string calldata schainName, uint256 index) external view returns (address);
-    function getTrustedReceiversAmount(bytes32 schainHash) external view returns (uint256);
+    function getTrustedReceiversAmount(SchainHash schainHash) external view returns (uint256);
 }
diff --git a/contracts/mainnet/IMessageProxyForMainnet.sol b/contracts/mainnet/IMessageProxyForMainnet.sol
index 4531342..8b7839f 100644
--- a/contracts/mainnet/IMessageProxyForMainnet.sol
+++ b/contracts/mainnet/IMessageProxyForMainnet.sol
@@ -33,11 +33,11 @@ interface IMessageProxyForMainnet is IMessageProxy {
     function addReimbursedContract(string memory schainName, address reimbursedContract) external;
     function removeReimbursedContract(string memory schainName, address reimbursedContract) external;
     function messageInProgress() external view returns (bool);
-    function isPaused(bytes32 schainHash) external view returns (bool);
-    function isReimbursedContract(bytes32 schainHash, address contractAddress) external view returns (bool);
-    function getReimbursedContractsLength(bytes32 schainHash) external view returns (uint256);
+    function isPaused(SchainHash schainHash) external view returns (bool);
+    function isReimbursedContract(SchainHash schainHash, address contractAddress) external view returns (bool);
+    function getReimbursedContractsLength(SchainHash schainHash) external view returns (uint256);
     function getReimbursedContractsRange(
-        bytes32 schainHash,
+        SchainHash schainHash,
         uint256 from,
         uint256 to
     )
diff --git a/contracts/mainnet/ISkaleManagerClient.sol b/contracts/mainnet/ISkaleManagerClient.sol
index 032e1e2..2363303 100644
--- a/contracts/mainnet/ISkaleManagerClient.sol
+++ b/contracts/mainnet/ISkaleManagerClient.sol
@@ -29,5 +29,5 @@ import {SchainHash} from "../DomainTypes.sol";
 interface ISkaleManagerClient {
     function initialize(IContractManager newContractManagerOfSkaleManager) external;
     function isSchainOwner(address sender, SchainHash schainHash) external view returns (bool);
-    function isAgentAuthorized(bytes32 schainHash, address sender) external view returns (bool);
+    function isAgentAuthorized(SchainHash schainHash, address sender) external view returns (bool);
 }