code: public void setSdpHelloHash(String version, String helloHash) {
  		if (!version.startsWith(VERSION_PREFIX)) {
  			logWarning("Different version number: '" + version + "' Ours: '"
  					+ VERSION_PREFIX + "' (" + VERSION + ")");
  		}
  		sdpHelloHashReceived = helloHash;
  	}
docs: Hash of the Hello message to be received. This hash is sent by the other
  end as part of the SDP for further verification.
  
  @param version
  ZRTP version of the hash
  @param helloHash
  Hello hash received as part of SDP in SIP