+sendTyping(recipient<s>, stop<b>) -> <>::
+* recipient : Phone number of a single recipient
+* targetSentTimestamp : True, if typing state should be stopped
+
+Exceptions: Failure, GroupNotFound, UntrustedIdentity
+
+
+sendReadReceipt(recipient<s>, targetSentTimestamp<ax>) -> <>::
+* recipient : Phone number of a single recipient
+* targetSentTimestamp : Array of Longs to identify the corresponding signal messages
+
+Exceptions: Failure, UntrustedIdentity
+