Remove unused contracts (#17)

* Remove unused contracts

* Point tests towards new contracts

Author: reednaa

.gitignore

@@ -16,4 +16,6 @@ docs/
 lcov.info
 lcov.*
 .lcov*
-*lcov*
+*lcov*
+
+settings.local.json

solidity/src/helpers/CATValidator.sol

@@ -64,4 +64,12 @@ contract CallProxyTest is Test {
         assertEq(rt, abi.encode(returnData));
         assertEq(success, true);
     }
+
+    function test_emptyEtherTransfer_fails() external {
+        vm.deal(address(this), 1 ether);
+        // Empty calldata causes sub(calldatasize(), 32) to underflow to 2^256-32,
+        // triggering an impossibly large memory expansion that exhausts all gas.
+        (bool success,) = address(c).call{ value: 1 ether }("");
+        assertFalse(success);
+    }
 }