export type ActivityDeliveryFailure = {
    email: string;
    error: string;
};
export type ActivityNotificationStatus = "delivered" | "delivery-failed" | "email-not-configured" | "no-recipients" | "notification-error";
export type ActivityNotificationResult = {
    status: ActivityNotificationStatus;
    sent: string[];
    failed: ActivityDeliveryFailure[];
    error?: string;
};
export interface ResolveActivityRecipientsInput {
    candidates: (string | null | undefined)[];
    actorEmail?: string | null;
    preferenceKey: string;
    preferenceField?: string;
}
export declare function resolveActivityRecipients({ candidates, actorEmail, preferenceKey, preferenceField, }: ResolveActivityRecipientsInput): Promise<string[]>;
export interface NotifyActivityInput extends ResolveActivityRecipientsInput {
    send: (to: string) => Promise<unknown>;
    logLabel?: string;
}
export declare function notifyActivity({ send, logLabel, ...resolve }: NotifyActivityInput): Promise<ActivityNotificationResult>;
export declare function runActivityNotification<T extends {
    status: string;
    sent: string[];
    failed: ActivityDeliveryFailure[];
}>(logLabel: string, resolve: () => Promise<T>): Promise<T | ActivityNotificationResult>;