Struct sp_core::ChangesTrieConfiguration[][src]

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 )

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