diff --git a/contracts/logics/settle/eth/exchangeRate.sol b/contracts/logics/settle/eth/exchangeRate.sol
new file mode 100644
index 0000000..eccd21e
--- /dev/null
+++ b/contracts/logics/settle/eth/exchangeRate.sol
@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.6.8;
+
+import { DSMath } from "../../../libs/safeMath.sol";
+
+contract LogicOne {
+
+    address poolToken;
+
+    function setExchangeRate() public {
+        // run setExchangeRate in address(this)
+    }
+
+    constructor (address ethPool) public {
+        poolToken = address(ethPool);
+    }
+
+    receive() external payable {}
+
+}