package im.status.keycard.io;

import java.io.IOException;

/**
 * A channel to transcieve ISO7816-4 APDUs.
 */
public interface CardChannel {
  /**
   * Sends the given C-APDU and returns an R-APDU.
   *
   * @param cmd the command to send
   * @return the card response
   * @throws IOException communication error
   */
  APDUResponse send(APDUCommand cmd) throws IOException;

  /**
   * True if connected, false otherwise
   * @return true if connected, false otherwise
   */
  boolean isConnected();
}