Trait SubstateDatabaseExtensions 

pub trait SubstateDatabaseExtensions: SubstateDatabase {
    // Provided methods
    fn get_raw_substate<'a>(
        &self,
        node_id: impl AsRef<NodeId>,
        partition_number: PartitionNumber,
        substate_key: impl ResolvableSubstateKey<'a>,
    ) -> Option<Vec<u8>> { ... }
    fn get_substate<'a, V: ScryptoDecode>(
        &self,
        node_id: impl AsRef<NodeId>,
        partition_number: PartitionNumber,
        substate_key: impl ResolvableSubstateKey<'a>,
    ) -> Option<V> { ... }
    fn get_existing_substate<'a, V: ScryptoDecode>(
        &self,
        node_id: impl AsRef<NodeId>,
        partition_number: PartitionNumber,
        substate_key: impl ResolvableSubstateKey<'a>,
    ) -> V { ... }
    fn list_raw_values<'a>(
        &self,
        node_id: impl AsRef<NodeId>,
        partition_number: PartitionNumber,
        from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>,
    ) -> Box<dyn Iterator<Item = (DbSortKey, Vec<u8>)> + '_> { ... }
    fn list_kinded_raw_values<'a, K: SubstateKeyContent>(
        &self,
        node_id: impl AsRef<NodeId>,
        partition_number: PartitionNumber,
        from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>,
    ) -> Box<dyn Iterator<Item = (K, Vec<u8>)> + '_> { ... }
    fn list_kinded_values<'a, K: SubstateKeyContent, V: ScryptoDecode>(
        &self,
        node_id: impl AsRef<NodeId>,
        partition_number: PartitionNumber,
        from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>,
    ) -> Box<dyn Iterator<Item = (K, V)> + '_> { ... }
    fn list_field_raw_values<'a>(
        &self,
        node_id: impl AsRef<NodeId>,
        partition_number: PartitionNumber,
        from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>,
    ) -> Box<dyn Iterator<Item = (FieldKey, Vec<u8>)> + '_> { ... }
    fn list_field_values<'a, V: ScryptoDecode>(
        &self,
        node_id: impl AsRef<NodeId>,
        partition_number: PartitionNumber,
        from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>,
    ) -> Box<dyn Iterator<Item = (FieldKey, V)> + '_> { ... }
    fn list_field_entries<'a, K: TryFrom<FieldKey>, V: ScryptoDecode>(
        &self,
        node_id: impl AsRef<NodeId>,
        partition_number: PartitionNumber,
        from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>,
    ) -> Box<dyn Iterator<Item = (K, V)> + '_> { ... }
    fn list_map_raw_values<'a>(
        &self,
        node_id: impl AsRef<NodeId>,
        partition_number: PartitionNumber,
        from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>,
    ) -> Box<dyn Iterator<Item = (MapKey, Vec<u8>)> + '_> { ... }
    fn list_map_values<'a, V: ScryptoDecode>(
        &self,
        node_id: impl AsRef<NodeId>,
        partition_number: PartitionNumber,
        from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>,
    ) -> Box<dyn Iterator<Item = (MapKey, V)> + '_> { ... }
    fn list_map_entries<'a, K: ScryptoDecode, V: ScryptoDecode>(
        &self,
        node_id: impl AsRef<NodeId>,
        partition_number: PartitionNumber,
        from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>,
    ) -> Box<dyn Iterator<Item = (K, V)> + '_> { ... }
    fn list_sorted_raw_values<'a>(
        &self,
        node_id: impl AsRef<NodeId>,
        partition_number: PartitionNumber,
        from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>,
    ) -> Box<dyn Iterator<Item = (SortedKey, Vec<u8>)> + '_> { ... }
    fn list_sorted_values<'a, V: ScryptoDecode>(
        &self,
        node_id: impl AsRef<NodeId>,
        partition_number: PartitionNumber,
        from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>,
    ) -> Box<dyn Iterator<Item = (SortedKey, V)> + '_> { ... }
}

These are a separate trait so that SubstateDatabase stays object-safe, and can be used as dyn SubstateDatabase.

Generic parameters aren’t permitted on object-safe traits.

Provided Methods

fn get_raw_substate<'a>( &self, node_id: impl AsRef<NodeId>, partition_number: PartitionNumber, substate_key: impl ResolvableSubstateKey<'a>, ) -> Option<Vec<u8>>

Gets the raw bytes of the substate’s value, if it exists.

Example

let is_bootstrapped = db.get_raw_substate(
    PACKAGE_PACKAGE,
    TYPE_INFO_FIELD_PARTITION,
    TypeInfoField::TypeInfo,
).is_some();

fn get_substate<'a, V: ScryptoDecode>( &self, node_id: impl AsRef<NodeId>, partition_number: PartitionNumber, substate_key: impl ResolvableSubstateKey<'a>, ) -> Option<V>

Gets the substate’s value, if it exists, and returns it decoded as Some(V). If it doesn’t exist, None is returned.

Panics

This method panics if:

• There is an error decoding the value into the V.

Example use:

let type_info_substate = db.get_substate::<TypeInfoSubstate>(
    PACKAGE_PACKAGE,
    TYPE_INFO_FIELD_PARTITION,
    TypeInfoField::TypeInfo,
)?;

fn get_existing_substate<'a, V: ScryptoDecode>( &self, node_id: impl AsRef<NodeId>, partition_number: PartitionNumber, substate_key: impl ResolvableSubstateKey<'a>, ) -> V

Gets the value of a subsate which is expected to exist, returns it decoded as V.

Panics

This method panics if:

• The substate doesn’t exist in the database.
• There is an error decoding the value into the V.

Example use:

let existing_type_info_substate: TypeInfoSubstate = db.get_existing_substate(
    PACKAGE_PACKAGE,
    TYPE_INFO_FIELD_PARTITION,
    TypeInfoField::TypeInfo,
)?;

fn list_raw_values<'a>( &self, node_id: impl AsRef<NodeId>, partition_number: PartitionNumber, from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>, ) -> Box<dyn Iterator<Item = (DbSortKey, Vec<u8>)> + '_>

Returns an iterator of the substates of a partition from an inclusive start cursor.

The iterator returns raw keys and values.

Pass None::<SubstateKey> as the cursor to iterate from the start of the partition.

fn list_kinded_raw_values<'a, K: SubstateKeyContent>( &self, node_id: impl AsRef<NodeId>, partition_number: PartitionNumber, from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>, ) -> Box<dyn Iterator<Item = (K, Vec<u8>)> + '_>

Returns an iterator of the substates of a partition from an inclusive start cursor.

The iterator returns K and the raw value for each substate. The caller must specify K as FieldKey, MapKey or SortedKey.

Pass None::<SubstateKey> as the cursor to iterate from the start of the partition.

fn list_kinded_values<'a, K: SubstateKeyContent, V: ScryptoDecode>( &self, node_id: impl AsRef<NodeId>, partition_number: PartitionNumber, from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>, ) -> Box<dyn Iterator<Item = (K, V)> + '_>

Returns an iterator of the substates of a partition from an inclusive start cursor.

The iterator returns K and V for each substate. The caller must specify K as FieldKey, MapKey or SortedKey. The value type V can be specified or inferred.

Pass None::<SubstateKey> as the cursor to iterate from the start of the partition.

Panics

This method panics if:

• There is an error decoding the value bytes into V.

fn list_field_raw_values<'a>( &self, node_id: impl AsRef<NodeId>, partition_number: PartitionNumber, from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>, ) -> Box<dyn Iterator<Item = (FieldKey, Vec<u8>)> + '_>

Returns an iterator of the substates of a field partition from an inclusive start cursor.

The iterator returns the FieldKey = u8 and the raw value for each substate.

Pass None::<SubstateKey> as the cursor to iterate from the start of the partition.

fn list_field_values<'a, V: ScryptoDecode>( &self, node_id: impl AsRef<NodeId>, partition_number: PartitionNumber, from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>, ) -> Box<dyn Iterator<Item = (FieldKey, V)> + '_>

Returns an iterator of the substates of a field partition from an inclusive start cursor.

The iterator returns the FieldKey = u8 and the decoded value V for each substate. The value type V can be specified or inferred.

Pass None::<SubstateKey> as the cursor to iterate from the start of the partition.

Panics

This method panics if:

• There is an error decoding the value bytes into V.

fn list_field_entries<'a, K: TryFrom<FieldKey>, V: ScryptoDecode>( &self, node_id: impl AsRef<NodeId>, partition_number: PartitionNumber, from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>, ) -> Box<dyn Iterator<Item = (K, V)> + '_>

Returns an iterator of the substates of a field partition from an inclusive start cursor.

The iterator returns the decoded key type K and the decoded value V for each substate. The key type K and value types V can be specified or inferred.

Pass None::<SubstateKey> as the cursor to iterate from the start of the partition.

Panics

This method panics if:

• There is an error converting the field key byte into K.
• There is an error decoding the value bytes into V.

fn list_map_raw_values<'a>( &self, node_id: impl AsRef<NodeId>, partition_number: PartitionNumber, from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>, ) -> Box<dyn Iterator<Item = (MapKey, Vec<u8>)> + '_>

Returns an iterator of the substates of a map partition from an inclusive start cursor.

The iterator returns the MapKey = Vec<u8> and the raw value for each substate.

Pass None::<SubstateKey> as the cursor to iterate from the start of the partition.

fn list_map_values<'a, V: ScryptoDecode>( &self, node_id: impl AsRef<NodeId>, partition_number: PartitionNumber, from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>, ) -> Box<dyn Iterator<Item = (MapKey, V)> + '_>

Returns an iterator of the substates of a map partition from an inclusive start cursor.

The iterator returns the MapKey = Vec<u8> and the decoded value V for each substate. The value type V can be specified or inferred.

Pass None::<SubstateKey> as the cursor to iterate from the start of the partition.

Panics

This method panics if:

• There is an error decoding the value bytes into V.

fn list_map_entries<'a, K: ScryptoDecode, V: ScryptoDecode>( &self, node_id: impl AsRef<NodeId>, partition_number: PartitionNumber, from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>, ) -> Box<dyn Iterator<Item = (K, V)> + '_>

Returns an iterator of the substates of a map partition from an inclusive start cursor.

The iterator returns the decoded key type K and the decoded value V for each substate. The key type K and value types V can be specified or inferred.

Pass None::<SubstateKey> as the cursor to iterate from the start of the partition.

Panics

This method panics if:

• There is an error decoding the field bytes into K.
• There is an error decoding the value bytes into V.

fn list_sorted_raw_values<'a>( &self, node_id: impl AsRef<NodeId>, partition_number: PartitionNumber, from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>, ) -> Box<dyn Iterator<Item = (SortedKey, Vec<u8>)> + '_>

Returns an iterator of the substates of a sorted partition from an inclusive start cursor.

The iterator returns the SortedKey = ([u8; 2], Vec<u8>) and the raw value for each substate.

Pass None::<SubstateKey> as the cursor to iterate from the start of the partition.

fn list_sorted_values<'a, V: ScryptoDecode>( &self, node_id: impl AsRef<NodeId>, partition_number: PartitionNumber, from_substate_key_inclusive: impl ResolvableOptionalSubstateKey<'a>, ) -> Box<dyn Iterator<Item = (SortedKey, V)> + '_>

Returns an iterator of the substates of a sorted partition from an inclusive start cursor.

The iterator returns the SortedKey = ([u8; 2], Vec<u8>) and the decoded value V for each substate. The value type V can be specified or inferred.

Pass None::<SubstateKey> as the cursor to iterate from the start of the partition.

Panics

This method panics if:

• There is an error decoding the value bytes into V.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<T: SubstateDatabase + ?Sized> SubstateDatabaseExtensions for T