NewAcceptActvity returns a new `Activity` instance of type "Accept".

NewAnnounceActivity will return an ActivityPub "Announce" activity from 'from' about 'object' (created by 'author_addr').

NewBoostActivity will return an ActivityPub "Announce" activity from 'from' about 'object' (created by 'author_addr').

NewCreateActivity returns a new `Activity` instance of type "Create".

NewCreateActivity returns a new `Activity` instance of type "Follow".

NewId return a new identifier in the form of a unique URI.

Retrieve note fetches and unmarshals the "application/activity+json" representation of 'uri'.

Deprecated, please use ACTIVITYSTREAMS_ACCEPT_HEADER.

Activity is a struct encapsulating an ActivityPub activity.

Tag is a struct encapsulating details about a tag.