Added repay function to WildcatMarket

src/interfaces/IMarketEventsAndErrors.sol

@@ -66,6 +66,8 @@ interface IMarketEventsAndErrors {
 
   error DepositToClosedMarket();
 
+  error RepayToClosedMarket();
+
   error BorrowFromClosedMarket();
 
   error CloseMarketWithUnpaidWithdrawals();
@@ -92,6 +94,8 @@ interface IMarketEventsAndErrors {
 
   event Borrow(uint256 assetAmount);
 
+  event MarketRepayment(uint256 assetAmount, uint256 timestamp);
+
   event MarketClosed(uint256 timestamp);
 
   event FeesCollected(uint256 assets);

src/market/WildcatMarket.sol

@@ -137,6 +137,26 @@ contract WildcatMarket is
     emit Borrow(amount);
   }
 
+  /**
+   * @dev Transfers funds from the caller to the market.
+   *
+   *      Any payments made through this function are considered
+   *      repayments from the borrower. Do *not* use this function
+   *      if you are a lender or an unrelated third party.
+   *
+   *      Reverts if the market is closed.
+   */
+  function repay(uint256 amount) external nonReentrant {
+    MarketState memory state = _getUpdatedState();
+    if (state.isClosed) {
+      revert RepayToClosedMarket();
+    }
+
+    asset.safeTransferFrom(msg.sender, address(this), amount);
+
+    emit MarketRepayment(amount, block.timestamp);
+  }
+
   /**
    * @dev Sets the market APR to 0% and marks market as closed.
    *