Struct Metadata 

pub struct Metadata {
    pub entries: Vec<(TransactionMetadatumLabel, TransactionMetadatum)>,
    pub encodings: Option<MetadataEncoding>,
}

Collection of TransactionMetadatums indexed by TransactionMetadatumLabels Handles the extremely rare edge-case of in previous generations allowing duplicate metadatum labels.

Fields

entries: Vec<(TransactionMetadatumLabel, TransactionMetadatum)>

encodings: Option<MetadataEncoding>

Implementations

impl Metadata

pub fn new() -> Self

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn set( &mut self, label: TransactionMetadatumLabel, datum: TransactionMetadatum, )

Replaces all metadatums of a given label, if any exist.

pub fn get( &self, label: TransactionMetadatumLabel, ) -> Option<&TransactionMetadatum>

Gets the Metadatum corresponding to a given label, if it exists. Note: In the case of duplicate labels this only returns the first metadatum. This is an extremely rare occurence on-chain but can happen.

pub fn get_all( &self, label: TransactionMetadatumLabel, ) -> Option<Vec<&TransactionMetadatum>>

In the extremely unlikely situation there are duplicate labels, this gets all of a single label

Trait Implementations

impl Clone for Metadata

fn clone(&self) -> Metadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Metadata

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

Formats the value using the given formatter.

impl Default for Metadata

fn default() -> Metadata

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Metadata

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Deserialize for Metadata

fn deserialize<R: BufRead + Seek>( raw: &mut Deserializer<R>, ) -> Result<Self, DeserializeError>

fn from_cbor_bytes(data: &[u8]) -> Result<Self, DeserializeError>

where Self: Sized,

from-bytes using the exact CBOR format specified in the CDDL binary spec. For hashes/addresses/etc this will include the CBOR bytes type/len/etc.

impl JsonSchema for Metadata

fn schema_name() -> String

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn is_referenceable() -> bool

Whether JSON Schemas generated for this type should be re-used where possible using the $ref keyword.

impl Serialize for Metadata

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Serialize for Metadata

fn serialize<'se, W: Write>( &self, serializer: &'se mut Serializer<W>, force_canonical: bool, ) -> Result<&'se mut Serializer<W>>

fn to_cbor_bytes(&self) -> Vec<u8>

Bytes of a structure using the CBOR bytes as per the CDDL spec which for foo = bytes will include the CBOR bytes type/len, etc. This gives the original bytes in the case where this was created from bytes originally, or will use whatever the specific encoding details are present in any encoding details struct for the type.

fn to_canonical_cbor_bytes(&self) -> Vec<u8>

Bytes of a structure using the CBOR bytes as per the CDDL spec which for foo = bytes will include the CBOR bytes type/len, etc. This gives the canonically encoded CBOR bytes always