sambuc/feat merge restart pr 2 #78
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* Ensure the mutex is not copied, even when the nodeServer is copied by storing a pointer to the mutex, instead of the mutex itself * Use Mutex instead of RWMutex, as having two readers of the variable at the same time means we are going to write the state at the same time, corrupting the state file on storage. * Mutex / RWMutex are not recursive / re-entrant in Go, so in two cases we do not call `Unlock()` through `defer` as `persistState()` also takes the lock. * As a rule of thumb, Locking a Mutex should be as close as possible to the resource requiring it, to minimize the size of the critical section / the time spent holding the lock.
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