I know we aren't planning to use token options anytime soon, but I don't want this to slip through the cracks. The grantee will call, but the erc-20 transfer occurs on the set recipient, which would take some extra coordination for Approvals. Should we take the payment from the grantee, as they are making the call? I could see both ways being viable option, one is just complicated to organize the approval from a front end.
function exerciseTokenOption(uint256 _tokensToExercise) external nonReentrant onlyGrantee {
if(block.timestamp>shortStopTime && terminated) revert MetaVest_ShortStopDatePassed();
if (_tokensToExercise == 0) revert MetaVesT_ZeroAmount();
if (_tokensToExercise > getAmountExercisable()) revert MetaVesT_MoreThanAvailable();

    // Calculate paymentAmount
    uint256 paymentAmount = getPaymentAmount(_tokensToExercise);
    if(paymentAmount == 0) revert MetaVesT_TooSmallAmount();

    address recipient = getRecipient();
    safeTransferFrom(paymentToken, recipient, getAuthority(), paymentAmount);
    tokensExercised += _tokensToExercise;
    emit MetaVesT_TokenOptionExercised(grantee, recipient, _tokensToExercise, paymentAmount);
}