diff --git a/contracts/BC_fusion/interface/ICrossChain.sol b/contracts/BC_fusion/interface/ICrossChain.sol
index c6cbf1d2..8b4767e6 100644
--- a/contracts/BC_fusion/interface/ICrossChain.sol
+++ b/contracts/BC_fusion/interface/ICrossChain.sol
@@ -2,5 +2,5 @@
 pragma solidity 0.8.17;
 
 interface ICrossChain {
-  function registeredContractChannelMap(address, uint8) external view returns (bool);
+    function registeredContractChannelMap(address, uint8) external view returns (bool);
 }