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According to this contract, the client can send the amount requested, in the form of cash, to the main contractor. Therefore, the client is the only participant who can initiate this contract. The cash state is paired with this contract.

As mentioned in Figure 2.5, this contract requires zero input states and gives one output state. The signatures of the client and the main contractor are mandatory in this contract for a successful transaction. Hence, this transaction is visible only to the client and the main contractor.