Changes:
- If the tokenIn is ETH, skip permit2 approval
- Make executors payable: When using delegatecall the executor inherits the execution context of whoever calls it. Our main swap function can accept ETH, it needs to be payable so by consequence the executors also need to be.
- Set uniswap v2 executor in test router
- Add tests for all possible cases of swap
- Add tests for all cases of splitSwap
- Add test functions to handle permit2 and encode swaps
--- don't change below this line ---
ENG-4041 Took 3 hours 50 minutes
Took 49 seconds
Took 14 seconds
I was inspired to do this because, when disabling the slither check for the delegatecall when calling the swap executor, I realized it's not clear from the same contract that we have already checked for contract code existence when setting the executor. This made me feel uneasy, as this contract can then not stand alone and must rely on the higher level contract to safely check for code existence, otherwise the delegatecall is unsafe. Keeping this logic in a separate contract seems error-prone to me, as we may remove the check for code existence without immediately realizing the implications of doing so.
For this reason I have organized it as follows:
- Logic/tests relating to proper roles/access control in the main TychoRouter.
- Lower-level logic/tests that checks contract validity before setting the executor in the SwapExecutionDispatcher
- Moved the deployment method into a test template for organization
- Created skeletons of dispatcher contracts
- Added all possible test cases for thoroughness
