/**
 * @module subscription
 * @description Agent subscription lifecycle — create, fund, cancel,
 * close, and fetch subscription accounts.
 *
 * @category Modules
 * @since v0.7.0
 * @packageDocumentation
 */
import { type PublicKey, type TransactionSignature } from "@solana/web3.js";
import { BN } from "@coral-xyz/anchor";
import { BaseModule } from "./base";
import type { SubscriptionData, CreateSubscriptionArgs } from "../types";
/**
 * @name SubscriptionModule
 * @description Manages recurring subscriptions between subscribers and agents.
 *
 * @category Modules
 * @since v0.7.0
 * @extends BaseModule
 */
export declare class SubscriptionModule extends BaseModule {
    private toNum;
    deriveSubscription(agentPda: PublicKey, subscriber?: PublicKey, subId?: BN | number | bigint): readonly [PublicKey, number];
    create(agentWallet: PublicKey, args: CreateSubscriptionArgs): Promise<TransactionSignature>;
    fund(agentWallet: PublicKey, subId: BN | number | bigint, amount: BN | number | bigint): Promise<TransactionSignature>;
    cancel(agentWallet: PublicKey, subId?: BN | number | bigint): Promise<TransactionSignature>;
    close(agentWallet: PublicKey, subId?: BN | number | bigint): Promise<TransactionSignature>;
    fetch(agentPda: PublicKey, subscriber?: PublicKey, subId?: BN | number | bigint): Promise<SubscriptionData>;
    fetchNullable(agentPda: PublicKey, subscriber?: PublicKey, subId?: BN | number | bigint): Promise<SubscriptionData | null>;
    fetchByPda(subPda: PublicKey): Promise<SubscriptionData>;
}
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