import { type ExpirationOptions, type Rumor } from "../types";
export type ExpirationOverride = ExpirationOptions | null | undefined;
export interface ExpirationPolicyInput {
    kind: number;
    nowSeconds: number;
    tags: string[][];
    expirationOverride: ExpirationOverride;
    defaultExpiration?: ExpirationOptions;
    peerExpiration?: ExpirationOptions | null;
    hasPeerExpiration: boolean;
    groupExpiration?: ExpirationOptions | null;
    hasGroupExpiration: boolean;
}
export declare function expirationOverrideFromSendOptions(options: {
    expiration?: ExpirationOverride;
    expiresAt?: number;
    ttlSeconds?: number;
}): ExpirationOverride;
export declare function applyExpirationPolicy(input: ExpirationPolicyInput): void;
export interface ChatSettingsAdoption {
    peerPubkey: string;
    options: ExpirationOptions | null | undefined;
}
export declare function chatSettingsAdoptionForRumor(event: Rumor, fromOwnerPubkey: string, ownerPubkey: string): ChatSettingsAdoption | undefined;
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