# The smallest useful contract: a counter anyone can increase.
contract Counter

state count: int
state last_caller: address

event Increased(by: address, amount: int, total: int)

action increment(amount: int):
    require amount > 0, "amount must be positive"
    require amount <= 100, "at most 100 per call"
    count += amount
    last_caller = caller
    emit Increased(caller, amount, count)

view get() -> int:
    return count

view last() -> address:
    return last_caller