whether an event can be reverted.
yes means yes.
'never' means that this type of event can never be reverted
'invalid' means that this type of event can generally be reverted but this
particular one can't - usually because some other event on the same data
makes that impossible
whether an event can be reverted. yes means yes. 'never' means that this type of event can never be reverted 'invalid' means that this type of event can generally be reverted but this particular one can't - usually because some other event on the same data makes that impossible