Analysis Run

Traceback (most recent call last):
  File "/var/www/tripwire/worker/worker.py", line 198, in main
    payload = dispatch_job(job_type, job_id, job_meta, run_data, config, laravel_client)
  File "/var/www/tripwire/worker/worker.py", line 114, in dispatch_job
    return slither_run.run(job_id, job_meta, run_data, config, log, laravel_client)
           ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/www/tripwire/worker/jobs/slither_run.py", line 1084, in run
    stdout_text, stderr_text, result_json = _run_slither(
                                            ~~~~~~~~~~~~^
        workspace,
        ^^^^^^^^^^
    ...<4 lines>...
        target_path=target_path,
        ^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/var/www/tripwire/worker/jobs/slither_run.py", line 958, in _run_slither
    raise RuntimeError(f"slither failed (exit {result.returncode}): {stderr_text or stdout_text}")
RuntimeError: slither failed (exit 1): 'forge clean' running (wd: /tmp/slither-5cvulj3x)
'forge config --json' running
'forge build --build-info --skip ./test/** ./script/** --force' running (wd: /tmp/slither-5cvulj3x)
Traceback (most recent call last):
  File "/var/www/tripwire/.venv/bin/slither", line 10, in <module>
    sys.exit(main())
             ~~~~^^
  File "/var/www/tripwire/.venv/lib/python3.13/site-packages/slither/__main__.py", line 776, in main
    main_impl(all_detector_classes=detectors, all_printer_classes=printers)
    ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/www/tripwire/.venv/lib/python3.13/site-packages/slither/__main__.py", line 882, in main_impl
    ) = process_all(filename, args, detector_classes, printer_classes)
        ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/www/tripwire/.venv/lib/python3.13/site-packages/slither/__main__.py", line 96, in process_all
    compilations = compile_all(target, **vars(args))
  File "/var/www/tripwire/.venv/lib/python3.13/site-packages/crytic_compile/crytic_compile.py", line 722, in compile_all
    compilations.append(CryticCompile(target, **kwargs))
                        ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
  File "/var/www/tripwire/.venv/lib/python3.13/site-packages/crytic_compile/crytic_compile.py", line 211, in __init__
    self._compile(**kwargs)
    ~~~~~~~~~~~~~^^^^^^^^^^
  File "/var/www/tripwire/.venv/lib/python3.13/site-packages/crytic_compile/crytic_compile.py", line 633, in _compile
    self._platform.compile(self, **kwargs)
    ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^
  File "/var/www/tripwire/.venv/lib/python3.13/site-packages/crytic_compile/platform/foundry.py", line 102, in compile
    hardhat_like_parsing(
    ~~~~~~~~~~~~~~~~~~~~^
        crytic_compile, str(self._target), build_directory, str(self._project_root)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/var/www/tripwire/.venv/lib/python3.13/site-packages/crytic_compile/platform/hardhat.py", line 52, in hardhat_like_parsing
    raise InvalidCompilation(txt)
crytic_compile.platform.exceptions.InvalidCompilation: Compilation failed. Can you run build command?
/tmp/slither-5cvulj3x/out/build-info is not a directory.

{"no_findings":true,"summary":"Reviewed the first-party Solidity sources in `AUDIT_BUNDLE.txt` (including `src/contracts/L1OpUSDCBridgeAdapter.sol`, `src/contracts/universal/OpUSDCBridgeAdapter.sol`, and `src/contracts/utils/FallbackProxyAdmin.sol`) for the implementation at 0x73d0fd329abecfbca9e0a482ed161a01616d9fca; no exploitable issues found within the scoped categories.","findings":[]}

OpenAI Codex v0.77.0 (research preview)
--------
workdir: /tmp/codex-o8_8irjv
model: gpt-5.2-codex
provider: openai
approval: never
sandbox: read-only
reasoning effort: high
reasoning summaries: auto
session id: 019be43c-1820-7ed3-916d-a7914b67e9e3
--------
user
Context: The user requested the proxy at 0xe6a5175293bbd0f5b5499801e29e3ce15e0fe90a.
Audit the implementation at 0x73d0fd329abecfbca9e0a482ed161a01616d9fca.
Findings should refer to the implementation unless explicitly about proxy mechanics.

You are a security auditor. Audit this Solidity codebase for exploitable vulnerabilities.
Focus on: reentrancy, access control, upgradeability/proxy issues, signature validation, oracle manipulation,
accounting/invariant breaks, external call patterns, unchecked return values, and dangerous delegatecall.

Scope rules:
- You MUST fully read `AUDIT_BUNDLE.txt` before concluding. It contains the complete contents of all first-party Solidity sources in this workspace.
- Treat `lib/` and `@openzeppelin/` as third-party dependencies; skip them unless there is a concrete misuse angle in first-party code.
- If there are only dependency files and no first-party sources, set no_findings=true and explain in summary.

Output MUST be valid JSON matching the provided schema.
- If you find nothing meaningful: set no_findings=true and findings=[].
- Otherwise: set no_findings=false and include findings with severity/category/title and file/line locations when possible.

Output constraints (IMPORTANT):
- severity MUST be exactly one of: info, low, medium, high, critical (lowercase).
- category MUST be exactly one of: access_control, reentrancy, math, oracle, upgradeability, auth, other.
Keep summary short and concrete.
mcp startup: no servers

thinking
**Planning bundle read with shell command**
exec
/bin/bash -lc ls in /tmp/codex-o8_8irjv succeeded in 8ms:
AUDIT_BUNDLE.txt
codex-output-schema.json
node_modules
src

thinking
**Reading AUDIT_BUNDLE.txt**
exec
/bin/bash -lc 'cat AUDIT_BUNDLE.txt' in /tmp/codex-o8_8irjv succeeded in 8ms:
This file concatenates the full contents of first-party Solidity sources for auditing.
Do not treat dependency code under lib/ or @openzeppelin/ as first-party.

================================================================================
FILE: src/contracts/L1OpUSDCBridgeAdapter.sol
================================================================================
// SPDX-License-Identifier: MIT
pragma solidity 0.8.25;

import {SafeERC20} from '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';
import {OpUSDCBridgeAdapter} from 'contracts/universal/OpUSDCBridgeAdapter.sol';
import {IL1OpUSDCBridgeAdapter} from 'interfaces/IL1OpUSDCBridgeAdapter.sol';
import {IL2OpUSDCBridgeAdapter} from 'interfaces/IL2OpUSDCBridgeAdapter.sol';
import {IOpUSDCBridgeAdapter} from 'interfaces/IOpUSDCBridgeAdapter.sol';
import {ICrossDomainMessenger} from 'interfaces/external/ICrossDomainMessenger.sol';
import {IUSDC} from 'interfaces/external/IUSDC.sol';

/**
 * @title L1OpUSDCBridgeAdapter
 * @notice L1OpUSDCBridgeAdapter is a contract that bridges Bridged USDC from L1 to L2 and and receives it from L2.

thinking
**Planning full AUDIT_BUNDLE read**

The AUDIT_BUNDLE output was truncated due to tool limits, so I'll use line-range commands like sed to read it in manageable chunks and ensure the entire file is captured. Next, I'll identify file section boundaries with ripgrep to guide chunked reading.
exec
/bin/bash -lc 'rg -n "''^FILE:" AUDIT_BUNDLE.txt' in /tmp/codex-o8_8irjv succeeded in 29ms:
5:FILE: src/contracts/L1OpUSDCBridgeAdapter.sol
344:FILE: src/contracts/universal/OpUSDCBridgeAdapter.sol
507:FILE: src/contracts/utils/FallbackProxyAdmin.sol
564:FILE: src/interfaces/IL1OpUSDCBridgeAdapter.sol
659:FILE: src/interfaces/IL2OpUSDCBridgeAdapter.sol
754:FILE: src/interfaces/IOpUSDCBridgeAdapter.sol
1052:FILE: src/interfaces/external/ICrossDomainMessenger.sol
1092:FILE: src/interfaces/external/IUSDC.sol

thinking
**Planning staged file reading**

I'm preparing to read the full file in 200-line chunks using sed to avoid truncation, covering consecutive ranges like 1-200, 201-400, and so on.
exec
/bin/bash -lc "sed -n '1,200p' AUDIT_BUNDLE.txt" in /tmp/codex-o8_8irjv succeeded in 12ms:
This file concatenates the full contents of first-party Solidity sources for auditing.
Do not treat dependency code under lib/ or @openzeppelin/ as first-party.

================================================================================
FILE: src/contracts/L1OpUSDCBridgeAdapter.sol
================================================================================
// SPDX-License-Identifier: MIT
pragma solidity 0.8.25;

import {SafeERC20} from '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';
import {OpUSDCBridgeAdapter} from 'contracts/universal/OpUSDCBridgeAdapter.sol';
import {IL1OpUSDCBridgeAdapter} from 'interfaces/IL1OpUSDCBridgeAdapter.sol';
import {IL2OpUSDCBridgeAdapter} from 'interfaces/IL2OpUSDCBridgeAdapter.sol';
import {IOpUSDCBridgeAdapter} from 'interfaces/IOpUSDCBridgeAdapter.sol';
import {ICrossDomainMessenger} from 'interfaces/external/ICrossDomainMessenger.sol';
import {IUSDC} from 'interfaces/external/IUSDC.sol';

/**
 * @title L1OpUSDCBridgeAdapter
 * @notice L1OpUSDCBridgeAdapter is a contract that bridges Bridged USDC from L1 to L2 and and receives it from L2.
exec
/bin/bash -lc "sed -n '200,400p' AUDIT_BUNDLE.txt" in /tmp/codex-o8_8irjv succeeded in 6ms:
   * @param _minGasLimit Minimum gas limit that the message can be executed with
   */
  function sendMessage(address _to, uint256 _amount, uint32 _minGasLimit) external override {
    if (_to == address(0)) revert IOpUSDCBridgeAdapter_InvalidAddress();

    // Ensure the address is not blacklisted
    if (IUSDC(USDC).isBlacklisted(_to)) revert IOpUSDCBridgeAdapter_BlacklistedAddress();

    // Ensure messaging is enabled
    if (messengerStatus != Status.Active) revert IOpUSDCBridgeAdapter_MessagingDisabled();

    _sendMessage(msg.sender, _to, _amount, _minGasLimit);
  }

  /**
   * @notice Send signer tokens to another chain through the linked adapter
   * @param _signer The address of the user sending the message
   * @param _to The target address on the destination chain
   * @param _amount The amount of tokens to send
   * @param _signature The signature of the user
exec
/bin/bash -lc "sed -n '400,600p' AUDIT_BUNDLE.txt" in /tmp/codex-o8_8irjv succeeded in 9ms:
   * @param _linkedAdapter The address of the linked adapter
   */
  // solhint-disable-next-line no-unused-vars
  constructor(address _usdc, address _messenger, address _linkedAdapter) {
    USDC = _usdc;
    MESSENGER = _messenger;
    LINKED_ADAPTER = _linkedAdapter;
    _disableInitializers();
  }

  /**
   * @notice Initialize the contract
   * @param _owner The owner of the contract
   */
  function initialize(address _owner) external virtual initializer {}

  /*///////////////////////////////////////////////////////////////
                             MESSAGING
  ///////////////////////////////////////////////////////////////*/

exec
/bin/bash -lc "sed -n '600,800p' AUDIT_BUNDLE.txt" in /tmp/codex-o8_8irjv succeeded in 6ms:
    uint32 _minGasLimitReceiveOnL2,
    uint32 _minGasLimitSetBurnAmount
  ) external;

  /**
   * @notice Sets the amount of USDC tokens that will be burned when the burnLockedUSDC function is called
   * @param _amount The amount of USDC tokens that will be burned
   * @dev Only callable by a whitelisted messenger during its migration process
   */
  function setBurnAmount(uint256 _amount) external;

  /**
   * @notice Burns the USDC tokens locked in the contract
   * @dev The amount is determined by the burnAmount variable, which is set in the setBurnAmount function
   */
  function burnLockedUSDC() external;

  /**
   * @notice Send a message to the linked adapter to call receiveStopMessaging() and stop outgoing messages.
   * @dev Only callable by the owner of the adapter
exec
/bin/bash -lc "sed -n '800,1000p' AUDIT_BUNDLE.txt" in /tmp/codex-o8_8irjv succeeded in 7ms:
  ///////////////////////////////////////////////////////////////*/

  /**
   * @notice Emitted when messaging is stopped
   * @param _messenger The address of the messenger contract that was stopped
   */
  event MessagingStopped(address _messenger);

  /**
   * @notice Emitted when a message is sent to the linked adapter
   * @param _user The user that sent the message
   * @param _to The target address on the destination chain
   * @param _amount The amount of tokens to send
   * @param _messenger The address of the messenger contract that was sent through
   * @param _minGasLimit Minimum gas limit that the message can be executed with
   */
  event MessageSent(
    address indexed _user, address indexed _to, uint256 _amount, address indexed _messenger, uint32 _minGasLimit
  );

exec
/bin/bash -lc "sed -n '1000,1200p' AUDIT_BUNDLE.txt" in /tmp/codex-o8_8irjv succeeded in 5ms:
   */
  function cancelSignature(uint256 _nonce) external;

  /*///////////////////////////////////////////////////////////////
                            VARIABLES
  ///////////////////////////////////////////////////////////////*/

  /**
   * @notice Fetches address of the USDC token
   * @return _usdc Address of the USDC token
   */
  // solhint-disable-next-line func-name-mixedcase
  function USDC() external view returns (address _usdc);

  /**
   * @notice Fetches address of the linked adapter on L2 to send messages to and receive from
   * @return _linkedAdapter Address of the linked adapter
   */
  // solhint-disable-next-line func-name-mixedcase
  function LINKED_ADAPTER() external view returns (address _linkedAdapter);
exec
/bin/bash -lc "sed -n '1200,1400p' AUDIT_BUNDLE.txt" in /tmp/codex-o8_8irjv succeeded in 6ms:
  /**
   * @notice Removes account from blacklist.
   * @param _account The address to remove from the blacklist.
   */
  function unBlacklist(address _account) external;

  /**
   * @notice Function to upgrade the usdc proxy to a new implementation
   * @param _newImplementation Address of the new implementation
   */
  function upgradeTo(address _newImplementation) external;

  /**
   * @notice Upgrades the USDC proxy to a new implementation and calls a function on the new implementation
   * @param _newImplementation Address of the new implementation
   * @param _data Data to call on the new implementation
   */
  function upgradeToAndCall(address _newImplementation, bytes calldata _data) external;

  /**



thinking
**Assessing reentrancy risk in bridge adapter**

The implementation likely targets L1OpUSDCBridgeAdapter and uses SafeERC20 for token transfers without explicit reentrancy guards; however, state updates occur before external calls, reducing reentrancy risk despite external calls to messenger and USDC contracts.
thinking
**Identifying nuanced risks and access controls**

The implementation handles signature validation, nonces, and upgradeability properly, but lacks inbound messaging pause checks, allowing L1 to accept calls when paused; `withdrawLockedFunds` and other functions have open caller access but no theft risk; some edge cases exist around locked funds and cross-chain message replay assumptions relying on trusted L2 adapters.
thinking
```json
{
  "no_findings": true,
  "summary": "Reviewed L1OpUSDCBridgeAdapter, OpUSDCBridgeAdapter, and FallbackProxyAdmin in the provided audit bundle at implementation 0x73d0...; no exploitable issues were identified within the scoped categories.",
  "findings": []
}
```
codex
{"no_findings":true,"summary":"Reviewed the first-party Solidity sources in `AUDIT_BUNDLE.txt` (including `src/contracts/L1OpUSDCBridgeAdapter.sol`, `src/contracts/universal/OpUSDCBridgeAdapter.sol`, and `src/contracts/utils/FallbackProxyAdmin.sol`) for the implementation at 0x73d0fd329abecfbca9e0a482ed161a01616d9fca; no exploitable issues found within the scoped categories.","findings":[]}
tokens used
39,606

{
    "codex": {
        "ran_at": "2026-01-22T05:47:32.597515+00:00",
        "returncode": 0
    },
    "project": {
        "mode": "source",
        "file_count": 31,
        "import_count": 34,
        "first_party_contracts_count": 8
    },
    "summary": "Reviewed the first-party Solidity sources in `AUDIT_BUNDLE.txt` (including `src/contracts/L1OpUSDCBridgeAdapter.sol`, `src/contracts/universal/OpUSDCBridgeAdapter.sol`, and `src/contracts/utils/FallbackProxyAdmin.sol`) for the implementation at 0x73d0fd329abecfbca9e0a482ed161a01616d9fca; no exploitable issues found within the scoped categories.",
    "raw_final": {
        "summary": "Reviewed the first-party Solidity sources in `AUDIT_BUNDLE.txt` (including `src/contracts/L1OpUSDCBridgeAdapter.sol`, `src/contracts/universal/OpUSDCBridgeAdapter.sol`, and `src/contracts/utils/FallbackProxyAdmin.sol`) for the implementation at 0x73d0fd329abecfbca9e0a482ed161a01616d9fca; no exploitable issues found within the scoped categories.",
        "findings": [],
        "no_findings": true
    },
    "no_findings": true,
    "proxy_context": {
        "proxy_run_id": "019be3d6-8331-73e6-a86d-412bb8153def",
        "proxy_address": "0xe6a5175293bbd0f5b5499801e29e3ce15e0fe90a",
        "implementation_run_id": "019be3d7-f3f6-7335-be5b-07a67d5c232d",
        "implementation_address": "0x73d0fd329abecfbca9e0a482ed161a01616d9fca"
    },
    "schema_version": 1
}

00000000: PUSH1 0x80
00000002: PUSH1 0x40
00000004: MSTORE
00000005: PUSH32 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc
00000026: SLOAD
00000027: PUSH1 0x00
00000029: SWAP1
0000002a: DUP2
0000002b: SWAP1
0000002c: DUP2
0000002d: SWAP1
0000002e: PUSH1 0x01
00000030: PUSH1 0x01
00000032: PUSH1 0xa0
00000034: SHL
00000035: SUB
00000036: AND
00000037: CALLDATASIZE
00000038: DUP3
00000039: DUP1
0000003a: CALLDATACOPY
0000003b: DUP2
0000003c: CALLDATASIZE
0000003d: SWAP2
0000003e: GAS
0000003f: DELEGATECALL
00000040: RETURNDATASIZE
00000041: DUP3
00000042: DUP1
00000043: RETURNDATACOPY
00000044: ISZERO
00000045: PUSH1 0x4b
00000047: JUMPI
00000048: RETURNDATASIZE
00000049: SWAP1
0000004a: RETURN
0000004b: JUMPDEST
0000004c: RETURNDATASIZE
0000004d: SWAP1
0000004e: REVERT
0000004f: INVALID
00000050: LOG2
00000051: PUSH5 0x6970667358
00000057: UNKNOWN(0x22)
00000058: SLT
00000059: KECCAK256
0000005a: UNKNOWN(0xE2)
0000005b: UNKNOWN(0xCA)
0000005c: LOG0
0000005d: UNKNOWN(0xBC)
0000005e: UNKNOWN(0xCE)
0000005f: UNKNOWN(0xC4)
00000060: UNKNOWN(0x1F)
00000061: TIMESTAMP
00000062: PUSH21 0x6d3537b85eff9c858b9f8470c314eb958c447b0eff
00000078: PUSH11 0x5c64736f6c634300081900
00000084: CALLER