address indexed holder,
uint256 indexed projectId,
holderis the address to which the tokens being claimed belong.
projectIdis the ID of the project to which the claimed tokens belong.
initialUnclaimedBalanceis the amount of unclaimed tokens the holder had a balance of at the time of claiming.
amountis the amount of tokens that were claimed.
calleris the address that issued the transaction within which the event was emitted.