Function: _claimRefund(address sender, address token)

This claims a refund for the original sender and token.

Inputs

• sender

  • Constraints: No constraints.

  • Impact: The address of the original sender.

• token

  • Constraints: No constraints.

  • Impact: The address of the token to refund.

Branches and code coverage (including function calls)

Intended branches

• The function checks if the sender is eligible for a refund and the amount to be refunded.

  Test coverage

• The function transfers the refunded amount to the sender either in ETH or the specified token.

  Test coverage

• The function emits a RefundClaimed event.

  Test coverage

Negative behavior

• The function reverts if the sender is not eligible for a refund (i.e., the mapping is zero).

  Negative test

• The function reverts if the ETH transfer fails.

  Negative test

Function call analysis

• payable(sender).call{value: amount}("")

  • What is controllable? sender.

  • If return value controllable, how is it used and how can it go wrong? The return value indicates the success of the call, and the data provides more details in case of failure.

  • What happens if it reverts, reenters, or does other unusual control flow? If the call fails, it will revert and the transaction will be rolled back. The checks-effects-interactions pattern is followed.