fee limits (#241)

Co-authored-by: Violet Vienhage <>

Author: aleph-v

contracts/src/HyperdriveStorage.sol

@@ -110,6 +110,13 @@ abstract contract HyperdriveStorage is MultiTokenStorage {
         _governance = _config.governance;
         _feeCollector = _config.feeCollector;
 
+        if (
+            _config.fees.curve > 1e18 ||
+            _config.fees.flat > 1e18 ||
+            _config.fees.governance > 1e18
+        ) {
+            revert Errors.InvalidFeeAmounts();
+        }
         _curveFee = _config.fees.curve;
         _flatFee = _config.fees.flat;
         _governanceFee = _config.fees.governance;

contracts/src/libraries/Errors.sol

@@ -19,6 +19,7 @@ library Errors {
     error InvalidInitialSharePrice();
     error InvalidMaturityTime();
     error InvalidPositionDuration();
+    error InvalidFeeAmounts();
     error NegativeInterest();
     error OutputLimit();
     error Paused();