diff --git a/debug.sh b/debug.sh
index f09e41d..55a2636 100755
--- a/debug.sh
+++ b/debug.sh
@@ -7,7 +7,7 @@ fi
 
 verify_arg=""
 extra_argument=""
-op_command=""
+op_command="op run --env-file="./.env" --"
 
 for arg in "$@"; do
     case $arg in
@@ -36,4 +36,4 @@ echo Value: ${VALUE}
 echo Calldata:
 cast pretty-calldata ${CALLDATA}
 calldata=$(cast calldata 'trace(uint256,address,address,uint256,bytes)' ${BLOCK} ${FROM} ${TO} ${VALUE} ${CALLDATA})
-${op_command} forge script ${verify_arg} --legacy ${@} script/OnchainDebugger.s.sol --sig 'run(bytes,string)' ${calldata} "${extra_argument}"
+${op_command} forge script ${verify_arg} --legacy ${@} OnchainDebugger --sig 'run(bytes,string)' ${calldata} "${extra_argument}"
diff --git a/script/BaseMigration.s.sol b/script/BaseMigration.s.sol
index 5466b23..888d369 100644
--- a/script/BaseMigration.s.sol
+++ b/script/BaseMigration.s.sol
@@ -9,6 +9,7 @@ import {
 import { LibString } from "../lib/solady/src/utils/LibString.sol";
 import { console, LibSharedAddress, StdStyle, IScriptExtended, ScriptExtended } from "./extensions/ScriptExtended.s.sol";
 import { IArtifactFactory, ArtifactFactory } from "./ArtifactFactory.sol";
+import { OnchainDebugger } from "./OnchainDebugger.s.sol";  // cheat to load artifact to parent `out` directory
 import { IMigrationScript } from "./interfaces/IMigrationScript.sol";
 import { LibProxy } from "./libraries/LibProxy.sol";
 import { DefaultContract } from "./utils/DefaultContract.sol";
diff --git a/script/extensions/ScriptExtended.s.sol b/script/extensions/ScriptExtended.s.sol
index a67be98..052e091 100644
--- a/script/extensions/ScriptExtended.s.sol
+++ b/script/extensions/ScriptExtended.s.sol
@@ -20,7 +20,7 @@ abstract contract ScriptExtended is Script, StdAssertions, IScriptExtended {
     console.log("> ", StdStyle.blue(fnName), "...");
     _;
   }
-  
+
   modifier onlyOn(TNetwork networkType) {
     require(network() == networkType, string.concat("ScriptExtended: Only allowed on ", CONFIG.getAlias(networkType)));
     _;
@@ -33,10 +33,13 @@ abstract contract ScriptExtended is Script, StdAssertions, IScriptExtended {
 
   function _configByteCode() internal virtual returns (bytes memory);
 
+  function _postCheck() internal virtual { }
+
   function run(bytes calldata callData, string calldata command) public virtual {
     CONFIG.resolveCommand(command);
     (bool success, bytes memory data) = address(this).delegatecall(callData);
     success.handleRevert(msg.sig, data);
+    _postCheck();
   }
 
   function network() public view virtual returns (TNetwork) {
diff --git a/src/WNT.sol b/src/WNT.sol
index 28cb8ce..6331eaf 100644
--- a/src/WNT.sol
+++ b/src/WNT.sol
@@ -3,7 +3,7 @@ pragma solidity ^0.8.17;
 
 import { ERC20 } from "../lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol";
 import { IWNT } from "./interfaces/IWNT.sol";
-import { LibNativeTransfer } from "./libraries/LibNativeTransfer.sol";
+import { LibNativeTransfer } from "contract-libs/transfers/LibNativeTransfer.sol";
 
 /// @notice Minimalist and modern Wrapped Ether implementation.
 /// @author Solmate
diff --git a/src/libraries/LibErrorHandler.sol b/src/libraries/LibErrorHandler.sol
deleted file mode 100644
index 8202fca..0000000
--- a/src/libraries/LibErrorHandler.sol
+++ /dev/null
@@ -1,40 +0,0 @@
-// SPDX-License-Identifier: MIT
-pragma solidity ^0.8.19;
-
-library LibErrorHandler {
-  /// @dev Reserves error definition to upload to signature database.
-  error ExternalCallFailed(bytes4 msgSig, bytes4 callSig);
-
-  /// @notice handle low level call revert if call failed,
-  /// If extcall return empty bytes, reverts with custom error.
-  /// @param status Status of external call
-  /// @param callSig function signature of the calldata
-  /// @param returnOrRevertData bytes result from external call
-  function handleRevert(bool status, bytes4 callSig, bytes memory returnOrRevertData) internal pure {
-    // Get the function signature of current context
-    bytes4 msgSig = msg.sig;
-    assembly ("memory-safe") {
-      if iszero(status) {
-        // Load the length of bytes array
-        let revertLength := mload(returnOrRevertData)
-        // Check if length != 0 => revert following reason from external call
-        if iszero(iszero(revertLength)) {
-          // Start of revert data bytes. The 0x20 offset is always the same.
-          revert(add(returnOrRevertData, 0x20), revertLength)
-        }
-
-        // Load free memory pointer
-        let ptr := mload(0x40)
-        // Store 4 bytes the function selector of ExternalCallFailed(msg.sig, callSig)
-        // Equivalent to revert ExternalCallFailed(bytes4,bytes4)
-        mstore(ptr, 0x49bf4104)
-        // Store 4 bytes of msgSig parameter in the next slot
-        mstore(add(ptr, 0x20), msgSig)
-        // Store 4 bytes of callSig parameter in the next slot
-        mstore(add(ptr, 0x40), callSig)
-        // Revert 68 bytes of error starting from 0x1c
-        revert(add(ptr, 0x1c), 0x44)
-      }
-    }
-  }
-}
diff --git a/src/libraries/LibNativeTransfer.sol b/src/libraries/LibNativeTransfer.sol
deleted file mode 100644
index 6e5a330..0000000
--- a/src/libraries/LibNativeTransfer.sol
+++ /dev/null
@@ -1,36 +0,0 @@
-// SPDX-License-Identifier: MIT
-pragma solidity ^0.8.0;
-
-import { LibErrorHandler } from "./LibErrorHandler.sol";
-
-/**
- * @title NativeTransferHelper
- */
-library LibNativeTransfer {
-  using LibErrorHandler for bool;
-
-  /**
-   * @dev Transfers Native Coin and wraps result for the method caller to a recipient.
-   */
-  function transfer(address to, uint256 value, uint256 gasAmount) internal {
-    (bool success, bytes memory returnOrRevertData) = trySendValue(to, value, gasAmount);
-    success.handleRevert(bytes4(0x0), returnOrRevertData);
-  }
-
-  /**
-   * @dev Unsafe send `amount` Native to the address `to`. If the sender's balance is insufficient,
-   * the call does not revert.
-   *
-   * Note:
-   * - Does not assert whether the balance of sender is sufficient.
-   * - Does not assert whether the recipient accepts NATIVE.
-   * - Consider using `ReentrancyGuard` before calling this function.
-   *
-   */
-  function trySendValue(address to, uint256 value, uint256 gasAmount)
-    internal
-    returns (bool success, bytes memory returnOrRevertData)
-  {
-    (success, returnOrRevertData) = to.call{ value: value, gas: gasAmount }("");
-  }
-}