Struct hdk::prelude::Update [−][src]
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
impl Update
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pub fn from_builder(
common: HeaderBuilderCommon,
original_entry_address: HoloHash<Entry>,
original_header_address: HoloHash<Header>,
entry_type: EntryType,
entry_hash: HoloHash<Entry>
) -> Update
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common: HeaderBuilderCommon,
original_entry_address: HoloHash<Entry>,
original_header_address: HoloHash<Header>,
entry_type: EntryType,
entry_hash: HoloHash<Entry>
) -> Update
Trait Implementations
impl Clone for Update
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impl Debug for Update
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impl<'de> Deserialize<'de> for Update
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pub fn deserialize<__D>(
__deserializer: __D
) -> Result<Update, <__D as Deserializer<'de>>::Error> where
__D: Deserializer<'de>,
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__deserializer: __D
) -> Result<Update, <__D as Deserializer<'de>>::Error> where
__D: Deserializer<'de>,
impl Eq for Update
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impl From<(Update, HeaderBuilderCommon)> for Update
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impl Hash for Update
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pub fn hash<__H>(&self, state: &mut __H) where
__H: Hasher,
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__H: Hasher,
pub fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
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H: Hasher,
impl HeaderBuilder<Update> for Update
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pub fn build(self, common: HeaderBuilderCommon) -> Update
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impl HeaderInner for Update
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pub fn into_header(self) -> Header
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impl PartialEq<Update> for Update
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impl Serialize for Update
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pub fn serialize<__S>(
&self,
__serializer: __S
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error> where
__S: Serializer,
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&self,
__serializer: __S
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error> where
__S: Serializer,
impl StructuralEq for Update
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impl StructuralPartialEq for Update
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impl<'_> TryFrom<&'_ Update> for SerializedBytes
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type Error = SerializedBytesError
The type returned in the event of a conversion error.
pub fn try_from(t: &Update) -> Result<SerializedBytes, SerializedBytesError>
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impl<'a> TryFrom<&'a Header> for &'a Update
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type Error = WrongHeaderError
The type returned in the event of a conversion error.
pub fn try_from(
value: &'a Header
) -> Result<&'a Update, <&'a Update as TryFrom<&'a Header>>::Error>
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value: &'a Header
) -> Result<&'a Update, <&'a Update as TryFrom<&'a Header>>::Error>
impl TryFrom<Header> for Update
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type Error = WrongHeaderError
The type returned in the event of a conversion error.
pub fn try_from(
value: Header
) -> Result<Update, <Update as TryFrom<Header>>::Error>
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value: Header
) -> Result<Update, <Update as TryFrom<Header>>::Error>
impl TryFrom<SerializedBytes> for Update
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type Error = SerializedBytesError
The type returned in the event of a conversion error.
pub fn try_from(sb: SerializedBytes) -> Result<Update, SerializedBytesError>
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impl TryFrom<Update> for SerializedBytes
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type Error = SerializedBytesError
The type returned in the event of a conversion error.
pub fn try_from(t: Update) -> Result<SerializedBytes, SerializedBytesError>
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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
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> DeserializeOwned for T where
T: for<'de> Deserialize<'de>,
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T: for<'de> Deserialize<'de>,
impl<Q, K> Equivalent<K> for Q where
K: Borrow<Q> + ?Sized,
Q: Eq + ?Sized,
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K: Borrow<Q> + ?Sized,
Q: Eq + ?Sized,
pub fn equivalent(&self, key: &K) -> bool
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impl<T> From<T> for T
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impl<T> Instrument for T
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pub 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;
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Notable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
pub 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;
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Notable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,