Struct StorageMetadata

Source
pub struct StorageMetadata {
    pub prefix: String,
    pub entries: BTreeMap<String, StorageEntryMetadata>,
}
Expand description

Metadata for a pallet’s storage.

Contains information about the storage prefix and all storage entries in this pallet.

Fields§

§prefix: String

The prefix used for all storage items in this pallet.

§entries: BTreeMap<String, StorageEntryMetadata>

The storage entries in this pallet, keyed by entry name.

Implementations§

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impl StorageMetadata

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pub fn from_v12_meta(md: StorageMetadata, lookup: &mut Types) -> Result<Self>

Creates storage metadata from V12 metadata format.

§Arguments
  • md - The V12 storage metadata
  • lookup - Types registry for resolving type references
§Returns

The parsed storage metadata, or an error if parsing fails.

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pub fn from_v13_meta(md: StorageMetadata, lookup: &mut Types) -> Result<Self>

Creates storage metadata from V13 metadata format.

§Arguments
  • md - The V13 storage metadata
  • lookup - Types registry for resolving type references
§Returns

The parsed storage metadata, or an error if parsing fails.

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pub fn from_v14_meta( md: &PalletStorageMetadata<PortableForm>, types: &PortableRegistry, ) -> Result<Self>

Creates storage metadata from V14 metadata format.

§Arguments
  • md - The V14 pallet storage metadata
  • types - Registry of portable types for resolving type references
§Returns

The parsed storage metadata, or an error if parsing fails.

Source

pub fn pallet_prefix_hash(&self) -> Vec<u8>

Computes the pallet prefix hash, which is the xxhash128 of the pallet’s storage prefix.

§Returns

The xxhash128 of the pallet prefix as a vector of bytes.

Source

pub fn storage_prefix_hash(&self, entry_name: &str) -> Result<Vec<u8>>

Computes the storage prefix hash for a given entry, which is the pallet prefix hash followed by the xxhash128 of the entry name.

§Arguments
  • entry_name - The name of the storage entry
§Returns

The complete storage prefix hash as a vector of bytes.

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pub fn storage_key(&self, entry_name: &str, keys: &[Vec<u8>]) -> Result<Vec<u8>>

Computes the full storage key for a given entry, given its keys (if any). This is a convenience method that delegates to the corresponding StorageEntryMetadata.

§Arguments
  • entry_name - The name of the storage entry
  • keys - The keys for this storage entry, if it’s a map
§Returns

The complete storage key as a vector of bytes, or an error if the entry doesn’t exist or the provided keys don’t match the storage entry type.

Trait Implementations§

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impl Clone for StorageMetadata

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fn clone(&self) -> StorageMetadata

Returns a duplicate of the value. Read more
1.0.0 · Source§

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

Performs copy-assignment from source. Read more

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