Use exit 4 when sending a single recipient message fails due to untrusted identity key

[signal-cli] / src / main / java / org / asamk / signal / manager / helper / UnidentifiedAccessSenderCertificateProvider.java

package org.asamk.signal.manager.helper;

public interface UnidentifiedAccessSenderCertificateProvider {

    byte[] getSenderCertificate();
}