Type Alias XmtpFnPreferenceCallback 

pub type XmtpFnPreferenceCallback = Option<unsafe extern "C" fn(updates: *const XmtpFfiPreferenceUpdate, count: i32, context: *mut c_void)>;

Callback for preference stream events. updates is borrowed — valid only during the callback invocation.

Aliased Type

pub enum XmtpFnPreferenceCallback {
    None,
    Some(unsafe extern "C" fn(*const XmtpFfiPreferenceUpdate, i32, *mut c_void)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*const XmtpFfiPreferenceUpdate, i32, *mut c_void))

Some value of type T.