pub struct Update {
pub author: HoloHash<Agent>,
pub timestamp: Timestamp,
pub header_seq: u32,
pub prev_header: HoloHash<Header>,
pub original_header_address: HoloHash<Header>,
pub original_entry_address: HoloHash<Entry>,
pub entry_type: EntryType,
pub entry_hash: HoloHash<Entry>,
}
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: HoloHash<Header>
original_header_address: HoloHash<Header>
original_entry_address: HoloHash<Entry>
entry_type: EntryType
entry_hash: HoloHash<Entry>
Implementations
Trait Implementations
sourceimpl<'de> Deserialize<'de> for Update
impl<'de> Deserialize<'de> for Update
sourcefn deserialize<__D>(
__deserializer: __D
) -> Result<Update, <__D as Deserializer<'de>>::Error> where
__D: Deserializer<'de>,
fn deserialize<__D>(
__deserializer: __D
) -> Result<Update, <__D as Deserializer<'de>>::Error> where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
sourceimpl From<Update> for EntryCreationHeader
impl From<Update> for EntryCreationHeader
sourcefn from(u: Update) -> EntryCreationHeader
fn from(u: Update) -> EntryCreationHeader
Converts to this type from the input type.
sourceimpl HashableContent for Update
impl HashableContent for Update
sourcefn hash_type(&self) -> <Update as HashableContent>::HashType
fn hash_type(&self) -> <Update as HashableContent>::HashType
The HashType which this content will be hashed to
sourcefn hashable_content(&self) -> HashableContentBytes
fn hashable_content(&self) -> HashableContentBytes
Return a subset of the content, either as SerializedBytes “content”, which will be used to compute the hash, or as an already precomputed hash which will be used directly Read more
sourceimpl HeaderBuilder<Update> for Update
impl HeaderBuilder<Update> for Update
fn build(self, common: HeaderBuilderCommon) -> Update
sourceimpl HeaderInner for Update
impl HeaderInner for Update
sourcefn into_header(self) -> Header
fn into_header(self) -> Header
Get a full header from the subset
sourceimpl Serialize for Update
impl Serialize for Update
sourcefn serialize<__S>(
&self,
__serializer: __S
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error> where
__S: Serializer,
fn serialize<__S>(
&self,
__serializer: __S
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error> where
__S: Serializer,
Serialize this value into the given Serde serializer. Read more
sourceimpl<'_> TryFrom<&'_ Update> for SerializedBytes
impl<'_> TryFrom<&'_ Update> for SerializedBytes
type Error = SerializedBytesError
type Error = SerializedBytesError
The type returned in the event of a conversion error.
sourcefn try_from(t: &Update) -> Result<SerializedBytes, SerializedBytesError>
fn try_from(t: &Update) -> Result<SerializedBytes, SerializedBytesError>
Performs the conversion.
sourceimpl TryFrom<SerializedBytes> for Update
impl TryFrom<SerializedBytes> for Update
type Error = SerializedBytesError
type Error = SerializedBytesError
The type returned in the event of a conversion error.
sourcefn try_from(sb: SerializedBytes) -> Result<Update, SerializedBytesError>
fn try_from(sb: SerializedBytes) -> Result<Update, SerializedBytesError>
Performs the conversion.
sourceimpl TryFrom<Update> for SerializedBytes
impl TryFrom<Update> for SerializedBytes
type Error = SerializedBytesError
type Error = SerializedBytesError
The type returned in the event of a conversion error.
sourcefn try_from(t: Update) -> Result<SerializedBytes, SerializedBytesError>
fn try_from(t: Update) -> Result<SerializedBytes, SerializedBytesError>
Performs the conversion.
impl Eq for Update
impl StructuralEq for Update
impl StructuralPartialEq for Update
Auto Trait Implementations
impl RefUnwindSafe for Update
impl Send for Update
impl Sync for Update
impl Unpin for Update
impl UnwindSafe for Update
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<Q, K> Equivalent<K> for Q where
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Q where
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
sourcefn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Compare self to key
and return true
if they are equal.
sourceimpl<T> Instrument for T
impl<T> Instrument for T
sourcefn instrument(self, span: Span) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
fn instrument(self, span: Span) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
T: Future, type Output = <T as Future>::Output;
sourcefn in_current_span(self) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
fn in_current_span(self) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
T: Future, type Output = <T as Future>::Output;
sourceimpl<T> ToOwned for T where
T: Clone,
impl<T> ToOwned for T where
T: Clone,
type Owned = T
type Owned = T
The resulting type after obtaining ownership.
sourcefn clone_into(&self, target: &mut T)
fn clone_into(&self, target: &mut T)
toowned_clone_into
)Uses borrowed data to replace owned data, usually by cloning. Read more
sourceimpl<T> WithSubscriber for T
impl<T> WithSubscriber for T
sourcefn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>ⓘNotable traits for WithDispatch<T>impl<T> Future for WithDispatch<T> where
T: Future, type Output = <T as Future>::Output;
where
S: Into<Dispatch>,
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>ⓘNotable traits for WithDispatch<T>impl<T> Future for WithDispatch<T> where
T: Future, type Output = <T as Future>::Output;
where
S: Into<Dispatch>,
T: Future, type Output = <T as Future>::Output;
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
sourcefn with_current_subscriber(self) -> WithDispatch<Self>ⓘNotable traits for WithDispatch<T>impl<T> Future for WithDispatch<T> where
T: Future, type Output = <T as Future>::Output;
fn with_current_subscriber(self) -> WithDispatch<Self>ⓘNotable traits for WithDispatch<T>impl<T> Future for WithDispatch<T> where
T: Future, type Output = <T as Future>::Output;
T: Future, type Output = <T as Future>::Output;
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more