allow sweeping of base tokens (#913)

* remove base balance restriction from sweep function

* update comments to reflect changes

* remove all instances of _totalBase

* fix tests

* add items to prettierignore and fix formatting

* add out/ to prettierignore

* extract baseToken tests

* add periods to comments

.prettierignore

@@ -2,4 +2,8 @@
 *.js
 *.md
 *.yaml
-lib/
+lib/
+target/
+forge-cache/
+node_modules/
+out/

test/instances/erc4626/Sweep.t.sol

@@ -110,7 +110,7 @@ contract SweepTest is BaseTest, IHyperdriveEvents {
         hyperdrive.sweep(IERC20(address(sweepable)));
     }
 
-    function test_sweep_failure_direct_sweeps() external {
+    function test_sweep_failure_direct_vaultToken() external {
         vm.stopPrank();
         vm.startPrank(celine);
 
@@ -120,7 +120,7 @@ contract SweepTest is BaseTest, IHyperdriveEvents {
         hyperdrive.sweep(IERC20(vaultToken));
     }
 
-    function test_sweep_failure_indirect_sweeps() external {
+    function test_sweep_failure_indirect_vaultToken() external {
         vm.stopPrank();
         vm.startPrank(celine);
 
@@ -129,6 +129,23 @@ contract SweepTest is BaseTest, IHyperdriveEvents {
         hyperdrive.sweep(IERC20(address(vaultForwarder)));
     }
 
+    function test_sweep_success_direct_baseToken() external {
+        vm.stopPrank();
+        vm.startPrank(celine);
+
+        // Trying to sweep the base token should succeed since any lingering amount is a mistake.
+        address baseToken = address(hyperdrive.baseToken());
+        hyperdrive.sweep(IERC20(baseToken));
+    }
+
+    function test_sweep_success_indirect_baseToken() external {
+        vm.stopPrank();
+        vm.startPrank(celine);
+
+        // Trying to sweep the base token should succeed since any lingering amount is a mistake.
+        hyperdrive.sweep(IERC20(address(baseForwarder)));
+    }
+
     function test_sweep_success_sweepCollector() external {
         // The sweep collector can sweep a sweepable token.
         vm.stopPrank();