Struct holochain_zome_types::header::Update [−][src]
pub struct Update {
pub author: AgentPubKey,
pub timestamp: Timestamp,
pub header_seq: u32,
pub prev_header: HeaderHash,
pub original_header_address: HeaderHash,
pub original_entry_address: EntryHash,
pub entry_type: EntryType,
pub entry_hash: EntryHash,
}
Expand description
A header which specifies that some new Entry content is intended to be an update to some old Entry.
This header semantically updates an entry to a new entry. It has the following effects:
- Create a new Entry
- This is the header of that new entry
- Create a metadata relationship between the original entry and this new header
The original header is required to prevent update loops: If you update A to B and B back to A, and then you don’t know which one came first, or how to break the loop.
Fields
timestamp: Timestamp
header_seq: u32
prev_header: HeaderHash
original_header_address: HeaderHash
original_entry_address: EntryHash
entry_type: EntryType
entry_hash: EntryHash
Implementations
pub fn from_builder(
common: HeaderBuilderCommon,
original_entry_address: EntryHash,
original_header_address: HeaderHash,
entry_type: EntryType,
entry_hash: EntryHash
) -> Self
Trait Implementations
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
Get a full header from the subset
type Error = SerializedBytesError
type Error = SerializedBytesError
The type returned in the event of a conversion error.
Performs the conversion.
type Error = SerializedBytesError
type Error = SerializedBytesError
The type returned in the event of a conversion error.
Performs the conversion.
type Error = SerializedBytesError
type Error = SerializedBytesError
The type returned in the event of a conversion error.
Performs the conversion.
Auto Trait Implementations
impl RefUnwindSafe for Update
impl UnwindSafe for Update
Blanket Implementations
Mutably borrows from an owned value. Read more
Compare self to key
and return true
if they are equal.
Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
pub fn vzip(self) -> V
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more