Reply Announcement

A Reply Announcement is the same as a Broadcast Announcement, but includes an inReplyTo field for noting it as a reply to a given DSNP Content URI.


FieldDescriptionData TypeSerializationParquet TypeBloom Filter
announcementTypeAnnouncement Type Enum (3)enumdecimalINT32no
contentHashmultihash-encoded hash of content stored at URLvariable length byte arrayhexadecimalBYTE_ARRAYYES
fromIdid of the user creating the Announcement64-bit unsigned integerdecimalUINT_64YES
inReplyToTarget DSNP Content URIUTF-8UTF-8UTF8YES
urlcontent URLUTF-8UTF-8UTF8no

Field Requirements


  • MUST be fixed to 3



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



  • 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

Supported URL Schemes

SchemeDescriptionReferenceDSNP Version Added
HTTPSHypertext Transfer Protocol SecureRFC28181.0