What happens if you send funds to a wrong address? Let's create measures to reverse this with `Edfis Pay`.

[balqaasem]

Edfis Pay - Transfers

Create these measures as a part of Edfis Pay so that users can opt-in and out at will.

1. ensure_account_exists(): If the account doesn't exist, fail the transaction.
2. ensure-account_has_ed(): If the account doesn't have ED, fail the transaction.

Provide various types of transfer options to users, each of which must handle both ensure_account_exists() and account_has_ed() options (they are optional for users to use, so they should be of type Boolean).

Transfer Types that Handle this issue:

1. red_packet_transfer: to automatically_unlock the funds to the sender if the receiver does not opened the red packet within TransferUnlockPeriod , therefore reversing the transaction.
2. reclaimable_transfer: allows the sender to reclaim (unlock) the funds if the receiver does not claim the transfer within TransferUnlockPeriod , therefore reversing the transaction.
3. willing_transfer: allows the receiver to accept or reject the funds.
4. reversible_willing_transfer: allows the receiver to accept or reject the funds. The transfer will automatically unlock if the receiver does not claim the transfer within TransferUnlockPeriod , therefore reversing the transaction.
5. protected_transfer: allows the receiver to claim the transfer only if the receiver knows the password to the transfer, else the transfer cannot be claimed therefore the TransferStatus stays as Unclaimed.
6. reversible_protected_transfer: allows the receiver to claim the transfer only if the receiver knows the password to the transfer, else the transfer cannot be claimed. The transfer will automatically_unlock the funds to the sender if the receiver does not claim the transfer within TransferUnlockPeriod.