junobuild-shared 0.8.0

Shared utilities for Juno.
Documentation 
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use crate::constants::internal::INITIAL_VERSION;
use crate::types::state::{Version, Versioned};

pub fn next_version<T>(current: &Option<T>) -> Version
where
    T: Versioned,
{
    match current {
        None => INITIAL_VERSION,
        Some(current) => next_version_from(current),
    }
}

pub fn next_version_from<T>(current: &T) -> Version
where
    T: Versioned,
{
    let version = current.version().unwrap_or_default();

    // We reset to zero if the maximum version (u64::MAX) is reached.
    // This is really an edge case—it would take an extremely high number of updates
    // (and therefore a significant amount of cycles) to reach this point.
    // But you never know.
    if version == u64::MAX {
        INITIAL_VERSION
    } else {
        version + 1
    }
}