grace.rs

use crate::{DataKey, SUBSCRIPTION_TTL_LEDGERS};
use soroban_sdk::Env;

pub fn get_grace_period(env: &Env) -> u64 {
    if let Some(seconds) = env.storage().instance().get(&DataKey::GracePeriod) {
        let lower = SUBSCRIPTION_TTL_LEDGERS / 2;
        let upper = SUBSCRIPTION_TTL_LEDGERS;
        env.storage().instance().extend_ttl(lower, upper);
        seconds
    } else {
        0
    }
}

/// Proposes a new contract-wide grace period.
pub fn propose_grace_period(env: &Env, seconds: u64) {
    assert!(seconds <= u64::MAX / 2, "grace period too large");
    crate::admin::require_admin(env);

    env.storage()
        .temporary()
        .set(&DataKey::PendingGracePeriod, &seconds);
    env.storage()
        .temporary()
        .extend_ttl(&DataKey::PendingGracePeriod, 17280, 17280);
    crate::events::publish_grace_period_proposed(env, seconds);
}

/// Commits a pending grace period proposal.
pub fn commit_grace_period(env: &Env) {
    crate::admin::require_admin(env);

    let seconds: u64 = env
        .storage()
        .temporary()
        .get(&DataKey::PendingGracePeriod)
        .unwrap_or_else(|| env.panic_with_error(crate::errors::ContractError::NoPendingProposal));

    env.storage()
        .temporary()
        .remove(&DataKey::PendingGracePeriod);

    env.storage()
        .instance()
        .set(&DataKey::GracePeriod, &seconds);

    let lower = SUBSCRIPTION_TTL_LEDGERS / 2;
    let upper = SUBSCRIPTION_TTL_LEDGERS;
    env.storage().instance().extend_ttl(lower, upper);

    crate::events::publish_grace_period_committed(env, seconds);
}