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![Strange transactions:
T2 = (User P1 sends 1 BTC from T1 to P2 signature of P1 on [T2])
T3 = (User P2 sends 1 BTC from T2 t...](https://image.slidesharecdn.com/3-160609173659/75/Smart-contracts-and-applications-part-I-3-2048.jpg?cb=1667964140)
![Redeeming condition
T3 redeems T2 if
C2 evaluates to true on input ([T3],W3).
Note: in the the standard transactions:
C2([...](https://image.slidesharecdn.com/3-160609173659/75/Smart-contracts-and-applications-part-I-4-2048.jpg?cb=1667964140)
![Solution: Alice asks Bob to sign a “refund”
transaction T’ with a timelock.
Please sign the following:
[T’] =
can be spent...](https://image.slidesharecdn.com/3-160609173659/75/Smart-contracts-and-applications-part-I-21-2048.jpg?cb=1667964140)
