Answer and Explanation:
1.Since we only want the winnings claimed by the end if the week, we would have to make sure the keys on the tickets are not activated until the end of the week, also verification of winnings occur by end of the week. This way someone cannot immediately unlock their bitcoin on a Monday but may just scratch the ticket.
2. Bitcoin wallets cannot be unlocked without the private key and so there is no other option when ticket is lost as bitcoin cannot be retrieved. Therefore it is important that tickets are secured properly during production and after when issued to contestants
The tickets are available to anybody. However, scratching should be permitted on the last day of the week, which is Saturday.
If any tickets are lost or destroyed, there is no method to recover the bitcoin due to the current bitcoin nature.
The key to release the bitcoin should be date-protected and triggered on the week's last working day. So, even if someone buys a ticket on Monday and attempts to unlock it right away, he won't be able to till the end of the week. Fairness can be achieved in this manner.
The only method to avoid this is to protect the printing so that it cannot be stolen or destroyed during the ticket making process.
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