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## opencard.core.service
Interface CHVDialog

All Known Implementing Classes:
  DefaultCHVDialog

public abstract interface CHVDialog

The interface which must be implemented by all dialogs to be used by card services for CHV input.

Method Summary
`java.lang.String` | `getCHV(int chvNumber)` Get a card holder verification for the given CHV number.

Method Detail

### getCHV

    public java.lang.String getCHV(int chvNumber)

  Get a card holder verification for the given CHV number.
  Parameters:
    `CHV` - number for which CHV is required
  Returns:
    the card holder verification for given number on success, null on failure.

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