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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def is_deposit_confirmed( channel_state: NettingChannelState, block_number: BlockNumber, ) -> bool: """True if the block which mined the deposit transaction has been confirmed. """

    if not channel_state.deposit_transaction_queue:
        return False

    return is_transaction_confirmed(
        channel_state.deposit_transaction_queue[0].block_number,
        block_number,
    )