Update Announcement

An Update Announcement is a way to note intent to update previously announced content. If the original Broadcast/Reply is Tombstoned, subsequent Updates should be ignored.

Fields

Field	Description	Data Type	Serialization	Parquet Type	Bloom Filter
announcementType	Announcement Type Enum (`6`)	enum	decimal	`INT32`	no
fromId	id of the user creating the announcement	64 bit unsigned integer	decimal	`UINT_64`	YES
contentHash	keccak-256 hash of updated content	32 bytes	hexadecimal	`BYTE_ARRAY`	YES
url	updated content URL	UTF-8	UTF-8	`UTF8`	no
targetContentHash	keccak-256 hash of target content	32 bytes	hexadecimal	`BYTE_ARRAY`	YES

Field Requirements

announcementType

MUST be fixed to 6

fromId

MUST be a DSNP User Id

contentHash

MUST be the keccak-256 hash of the bytes of the reference at the url

url

MUST NOT refer to localhost or any reserved IP addresses as defined in RFC6890
Resource MUST one of the supported Activity Content Types
MUST use one of the supported URL Schemes

targetContentHash

MUST be the contentHash of an allowed Announcement type with the same fromId as the Update Announcement

Update Allowed Announcement Types

Value	Name
2	Broadcast
3	Reply