// the number of restored Tx should be very small or most of time ZERO
// Error returned from validation is ignored, tx could still be lost if validation fails.
// TODO: adjust tx timestamp so that it won't starve in pool.
// the number of restored Tx should be very small or most of time ZERO
// Error returned from validation is ignored, tx could still be lost if validation fails.
// TODO: adjust tx timestamp so that it won't starve in pool.