Struct Update

pub struct Update<W = EntryRateWeight> {
    pub author: HoloHash<Agent>,
    pub timestamp: Timestamp,
    pub action_seq: u32,
    pub prev_action: HoloHash<Action>,
    pub original_action_address: HoloHash<Action>,
    pub original_entry_address: HoloHash<Entry>,
    pub entry_type: EntryType,
    pub entry_hash: HoloHash<Entry>,
    pub weight: W,
}

An action which specifies that some new Entry content is intended to be an update to some old Entry.

This action semantically updates an entry to a new entry. It has the following effects:

• Create a new Entry
• This is the action of that new entry
• Create a metadata relationship between the original entry and this new action

The original action is required to prevent update loops: If you update entry A to B and B back to A, and only track the original entry, then you have a loop of references. Every update introduces a new action, so there can only be a linear history of action updates, even if the entry history experiences repeats.

Fields

author: HoloHash<Agent>

timestamp: Timestamp

action_seq: u32

prev_action: HoloHash<Action>

original_action_address: HoloHash<Action>

original_entry_address: HoloHash<Entry>

entry_type: EntryType

entry_hash: HoloHash<Entry>

weight: W

Trait Implementations

impl ActionBuilder<Update<()>> for Update

fn build(self, common: ActionBuilderCommon) -> Update<()>

impl ActionUnweighed for Update<()>

type Weighed = Update

type Weight = EntryRateWeight

fn weighed(self, weight: EntryRateWeight) -> Update

Add a weight to this unweighed action, making it “weighed”. The weight is determined by the weigh callback, which is run on the unweighed version of this action.

impl ActionWeighed for Update

type Unweighed = Update<()>

type Weight = EntryRateWeight

fn into_action(self) -> Action

Construct the full Action enum with this variant.

fn unweighed(self) -> Update<()>

Erase the rate limiting weight info, creating an “unweighed” version of this action. This is used primarily by validators who need to run the weigh callback on an action they received, and want to make sure their callback is not using the predefined weight to influence the result.

impl<W> Clone for Update<W>

where W: Clone,

fn clone(&self) -> Update<W>

Returns a duplicate of the value.

const fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<W> Debug for Update<W>

where W: Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'de, W> Deserialize<'de> for Update<W>

where W: Deserialize<'de>,

fn deserialize<__D>( __deserializer: __D, ) -> Result<Update<W>, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<Update> for EntryCreationAction

fn from(u: Update) -> EntryCreationAction

Converts to this type from the input type.

impl<W> Hash for Update<W>

where W: Hash,

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl HashableContent for Update

type HashType = Action

The HashType which this content will be hashed to

fn hash_type(&self) -> <Update as HashableContent>::HashType

The HashType which this content will be hashed to

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

impl<W> PartialEq for Update<W>

where W: PartialEq,

fn eq(&self, other: &Update<W>) -> bool

Tests for self and other values to be equal, and is used by ==.

const fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<W> Serialize for Update<W>

where W: Serialize,

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.

impl<'a> TryFrom<&'a Action> for &'a Update

type Error = WrongActionError

The type returned in the event of a conversion error.

fn try_from( value: &'a Action, ) -> Result<&'a Update, <&'a Update as TryFrom<&'a Action>>::Error>

Performs the conversion.

impl TryFrom<&Update> for SerializedBytes

type Error = SerializedBytesError

The type returned in the event of a conversion error.

fn try_from(t: &Update) -> Result<SerializedBytes, SerializedBytesError>

Performs the conversion.

impl TryFrom<Action> for Update

type Error = WrongActionError

The type returned in the event of a conversion error.

fn try_from(value: Action) -> Result<Update, <Update as TryFrom<Action>>::Error>

Performs the conversion.

impl TryFrom<SerializedBytes> for Update

type Error = SerializedBytesError

The type returned in the event of a conversion error.

fn try_from(sb: SerializedBytes) -> Result<Update, SerializedBytesError>

Performs the conversion.

impl TryFrom<Update> for SerializedBytes

type Error = SerializedBytesError

The type returned in the event of a conversion error.

fn try_from(t: Update) -> Result<SerializedBytes, SerializedBytesError>

Performs the conversion.

impl<W> Eq for Update<W>

where W: Eq,

impl<W> StructuralPartialEq for Update<W>