contract flipper {
bool private value;
/// Constructor that initializes the `bool` value to the given `init_value`.
@payer(payer)
constructor(bool initvalue) {
value = initvalue;
}
/// A message that can be called on instantiated contracts.
/// This one flips the value of the stored `bool` from `true`
/// to `false` and vice versa.
function flip() public {
value = !value;
}
/// Simply returns the current value of our `bool`.
function get() public view returns (bool) {
return value;
}
}