Method backoff_for

nodedb-cluster/src/bootstrap/config.rs:48–60

Backoff delay before `attempt` (1-indexed). Attempt 0 is the initial try and never sleeps. Returns `Duration::ZERO` for out-of-range attempts.

(&self, attempt: u32)

    /// initial try and never sleeps. Returns `Duration::ZERO` for
    /// out-of-range attempts.
    pub fn backoff_for(&self, attempt: u32) -> Duration {
        if attempt == 0 || attempt > self.max_attempts {
            return Duration::ZERO;
        }
        // Schedule grows exponentially toward `max_backoff_secs`. We
        // compute in millis so small `max_backoff_secs` values (test
        // configs) still produce non-zero delays for the early
        // attempts instead of being floored to zero seconds.
        let exp = self.max_attempts - attempt;
        let max_ms = self.max_backoff_secs.saturating_mul(1_000);
        let ms = max_ms >> exp;
        Duration::from_millis(ms.max(1))
    }
}

/// Configuration for cluster formation.