diff --git a/contracts/SwapFactory.sol b/contracts/SwapFactory.sol
index 7148f40..3ca6846 100644
--- a/contracts/SwapFactory.sol
+++ b/contracts/SwapFactory.sol
@@ -33,34 +33,29 @@ import {ISwapFactory} from "./interfaces/ISwapFactory.sol";
  * on-chain execution and trade on Swaplace.
  */
 abstract contract SwapFactory is ISwapFactory, ISwap, IErrors {
-    /**
-     * @dev See {ISwapFactory-makeAsset}.
-     */
-    function makeAsset(
-        address addr,
-        uint256 amountOrId
-    ) public pure virtual returns (Asset memory) {
-        return Asset(addr, amountOrId);
-    }
-
-    /**
-     * @dev See {ISwapFactory-makeSwap}.
-     */
-    function makeSwap(
-        address owner,
-        address allowed,
-        uint256 expiry,
-        Asset[] memory biding,
-        Asset[] memory asking
-    ) public view virtual returns (Swap memory) {
-        if (expiry < block.timestamp) revert InvalidExpiry(expiry);
+  /**
+   * @dev See {ISwapFactory-makeAsset}.
+   */
+  function makeAsset(
+    address addr,
+    uint256 amountOrId
+  ) public pure virtual returns (Asset memory) {
+    return Asset(addr, amountOrId);
+  }
 
-        if (biding.length == 0 || asking.length == 0)
-            revert InvalidAssetsLength();
+  /**
+   * @dev See {ISwapFactory-makeSwap}.
+   */
+  function makeSwap(
+    address owner,
+    address allowed,
+    uint256 expiry,
+    Asset[] memory biding,
+    Asset[] memory asking
+  ) public view virtual returns (Swap memory) {
+    if (expiry < block.timestamp) revert InvalidExpiry(expiry);
 
-    if (biding.length == 0 || asking.length == 0) {
-      revert InvalidAssetsLength();
-    }
+    if (biding.length == 0 || asking.length == 0) revert InvalidAssetsLength();
 
     return Swap(owner, allowed, expiry, biding, asking);
   }