import { type Address } from '@solana/kit';
/**
 * Map the shared subscription period to the subscriptions program's
 * `period_hours` value. The Solana profile only supports `day` and `week`;
 * `month` cannot be represented exactly because the on-chain program uses
 * fixed elapsed seconds.
 *
 * @throws If the inputs cannot be represented on-chain.
 */
export declare function mapSubscriptionPeriodToHours(periodUnit: 'day' | 'week', periodCount: number): number;
/** Verify the computed `period_hours` is within the on-chain program's [1, 8760] bound. */
export declare function assertPeriodHoursInRange(periodHours: number): void;
/**
 * Derive the `SubscriptionAuthority` PDA for a given subscriber and mint.
 * Seeds: `["SubscriptionAuthority", subscriber, mint]`.
 */
export declare function deriveSubscriptionAuthorityPda(params: {
    mint: Address;
    programId: Address;
    subscriber: Address;
}): Promise<Address>;
/**
 * Derive the `SubscriptionDelegation` PDA for a given plan and subscriber.
 * Seeds: `["subscription", plan_pda, subscriber]`.
 */
export declare function deriveSubscriptionPda(params: {
    planPda: Address;
    programId: Address;
    subscriber: Address;
}): Promise<Address>;
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