uint256 indexed projectId,
uint256 indexed amount,
uint256 indexed fee,
projectIdis the ID of the project whos fees are being held.
amountis the amount that a fee being held was taken from.
feeis the percent of the fee, out of
feeDiscountis the fee discount that was applicable at the time of holding the fee.
beneficiaryis the address that should receive any benefits from later processing the fee.
calleris the address that issued the transaction within which the event was emitted.