Tombstone Announcement

A Tombstone Announcement is a way to note that a previously announced content is invalid and the related Announcement should be considered reverted. It is NOT possible to revert a tombstone.

Fields

Field	Description	Data Type	Serialization	Parquet Type	Bloom Filter
announcementType	Announcement Type Enum (`0`)	enum	decimal	`INT32`	no
fromId	Id of the user creating the Announcement and the Tombstoned Announcement	64-bit unsigned integer	decimal	`UINT_64`	YES
targetAnnouncementType	target tombstoned Announcement type	enum	decimal	`INT32`	no
targetContentHash	target `contentHash` of the original Announcement to tombstone	UTF-8	base32 multibase	`UTF8`	YES

Field Requirements

announcementType

MUST be fixed to 0

fromId

MUST be a DSNP User Id
MUST have authorized the creation of the Announcement, either directly or via a transparent chain of delegation

targetAnnouncementType

MUST be the Announcement Type of the target Announcement
MUST ONLY be a Tombstone allowed Announcement Type

Tombstone Allowed Announcement Types

Value	Name
2	Broadcast
3	Reply
8	User Attribute Set
9	DSNP Content Attribute Set
10	External Content Attribute Set

targetContentHash

MUST be the contentHash of a previous Announcement of an Allowed Announcement Type with the same fromId as the Tombstone Announcement