Exceptions: Failure, InvalidNumber
+sendGroupRemoteDeleteMessage(targetSentTimestamp<x>, groupId<ay>) -> timestamp<x>::
+* targetSentTimestamp : Long representing timestamp of the message to delete
+* groupId : Byte array with base64 encoded group identifier
+* timestamp : Long, can be used to identify the corresponding signal reply
+
+Exceptions: Failure, GroupNotFound
+
+sendRemoteDeleteMessage(targetSentTimestamp<x>, recipient<s>) -> timestamp<x>::
+sendRemoteDeleteMessage(targetSentTimestamp<x>, recipients<as>) -> timestamp<x>::
+* targetSentTimestamp : Long representing timestamp of the message to delete
+* recipient : String with the phone number of a single recipient
+* recipients : Array of strings with phone numbers, should there be more recipients
+* timestamp : Long, can be used to identify the corresponding signal reply
+
+Depending on the type of the recipient(s) field this deletes a message with one or multiple recipients.
+
+Exceptions: Failure, InvalidNumber
+
getContactName(number<s>) -> name<s>::
* number : Phone number
* name : Contact's name in local storage (from the master device for a linked account, or the one set with setContactName); if not set, contact's profile name is used