Function: _swapBalancer(byte[] swapPayload)

This swaps using the balancerVault.

Inputs

• swapPayload

  • Constraints: No constraints.

  • Impact: The payload for the swap --- varies by DEX.

Branches and code coverage (including function calls)

Intended branches

• The function calls the balancerVault with the provided swapPayload.

  Test coverage

• The function checks if the provided selector matches for a single swap or assumes multiswap if not.

  Test coverage

• In case of single swap, returns the decoded uint256 amount of toToken received.

  Test coverage

• In case of multiswap, checks negative asset deltas for received amounts and reverts if none are found.

  Test coverage

Negative behavior

• The function reverts if the balancerVault call is not successful.

  Negative test

Function call analysis

• balancerVault.call(swapPayload)

  • What is controllable? swapPayload.

  • If return value controllable, how is it used and how can it go wrong? Success used for condition; data used for decoding results.

  • What happens if it reverts, reenters, or does other unusual control flow? This function call can revert if the balancerVault call fails --- no reentrancy scenarios.