diff --git a/contracts/ProxyLogics/InstaCompound.sol b/contracts/ProxyLogics/InstaCompound.sol
new file mode 100644
index 0000000..05c6185
--- /dev/null
+++ b/contracts/ProxyLogics/InstaCompound.sol
@@ -0,0 +1,15 @@
+pragma solidity ^0.5.0;
+
+interface CTokenInterface {
+    function mint(uint mintAmount) external returns (uint); // For ERC20
+    function mint() external payable; // For ETH
+    function redeem(uint redeemTokens) external returns (uint);
+    function redeemUnderlying(uint redeemAmount) external returns (uint);
+    function borrow(uint borrowAmount) external returns (uint);
+    function repayBorrow(uint repayAmount) external returns (uint); // For ERC20
+    function repayBorrow() external payable; // For ETH
+    function repayBorrowBehalf(address borrower, uint repayAmount) external returns (uint); // For ERC20
+    function repayBorrowBehalf(address borrower) external payable; // For ETH
+    function liquidateBorrow(address borrower, uint repayAmount, address cTokenCollateral) external returns (uint);
+    function liquidateBorrow(address borrower, address cTokenCollateral) external payable;
+}
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