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 |
| targetAnnouncementType | target updated Announcement type | enum | decimal | INT32 | 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 be one of the supported Activity Content Types
- MUST use one of the supported URL Schemes
targetAnnouncementType
- MUST be the Announcement Type of the target Announcement
- MUST ONLY be an Update allowed Announcement Type
Update Allowed Announcement Types
targetContentHash
- MUST be the
contentHashof an allowed Announcement type with the samefromIdas the Update Announcement