pub struct ChangesTrieConfiguration {
    pub digest_interval: u32,
    pub digest_levels: u32,
}
Expand description

Substrate changes trie configuration.

Fields

digest_interval: u32

Interval (in blocks) at which level1-digests are created. Digests are not created when this is less or equal to 1.

digest_levels: u32

Maximal number of digest levels in hierarchy. 0 means that digests are not created at all (even level1 digests). 1 means only level1-digests are created. 2 means that every digest_interval^2 there will be a level2-digest, and so on. Please ensure that maximum digest interval (i.e. digest_interval^digest_levels) is within u32 limits. Otherwise you’ll never see digests covering such intervals && maximal digests interval will be truncated to the last interval that fits u32 limits.

Implementations

Create new configuration given digest interval and levels.

Is digest build enabled?

Do we need to build digest at given block?

Returns max digest interval. One if digests are not created at all.

Returns max level digest block number that has been created at block <= passed block number.

Returns None if digests are not created at all.

Returns max level digest blocks range (inclusive) which includes passed block.

Returns None if digests are not created at all. It will return the first max-level digest if block is <= zero.

Returns Some if digest must be built at given block number. The tuple is: ( digest level digest interval (in blocks) step between blocks we’re interested in when digest is built )

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Attempt to deserialise the value from input.

Attempt to skip the encoded value from input. Read more

Returns the fixed encoded size of the type. Read more

Returns the “default value” for a type. Read more

Deserialize this value from the given Serde deserializer. Read more

Convert self to a slice and append it to the destination.

If possible give a hint of expected size of the encoding. Read more

Convert self to an owned vector.

Convert self to a slice and then invoke the given closure with it.

Calculates the encoded size. Read more

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself. If T::size_of is a constant, consider implementing constant_size as well. Read more

Used to optimize MallocSizeOf implementation for collections like Vec and HashMap to avoid iterating over them unnecessarily. The Self: Sized bound is for object safety. Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

Serialize this value into the given Serde serializer. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Decode Self and consume all of the given input data. Read more

Decode Self and consume all of the given input data. Read more

Decode Self with the given maximum recursion depth. Read more

Returns the argument unchanged.

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Get a reference to the inner from the outer.

Get a mutable reference to the inner from the outer.

Return an encoding of Self prepended by given slice.

Method to launch a heapsize measurement with a fresh state. Read more

Should always be Self

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

The counterpart to unchecked_from.