import { Aci } from '../../Address.js';
import * as uuid from '../../uuid.js';
import { RequestOptions } from '../Chat.js';
declare module '../Chat' {
    interface UnauthenticatedChatConnection extends UnauthUsernamesService {
    }
}
type Uuid = uuid.Uuid;
export interface UnauthUsernamesService {
    /**
     * Looks up a username hash on the service, like that computed by {@link usernames.hash}.
     *
     * Returns the corresponding account's ACI, or `null` if the username doesn't correspond to an
     * account.
     *
     * Throws / completes with failure only if the request can't be completed, potentially including
     * if the hash is structurally invalid.
     */
    lookUpUsernameHash: (request: {
        hash: Uint8Array<ArrayBuffer>;
    }, options?: RequestOptions) => Promise<Aci | null>;
    /**
     * Looks up a username link on the service by UUID.
     *
     * Returns a decrypted, validated username, or `null` if the UUID does not correspond to a
     * username link (perhaps the user rotated their link).
     *
     * Throws / completes with failure if the request can't be completed. Specifically throws
     * {@link InvalidEntropyDataLength} if the entropy is invalid, and
     * {@link InvalidUsernameLinkEncryptedData} if the data fetched from the service could not be
     * decrypted or did not contain a valid username. `uuid` should be validated ahead of time.
     */
    lookUpUsernameLink: (request: {
        uuid: Uuid;
        entropy: Uint8Array<ArrayBuffer>;
    }, options?: RequestOptions) => Promise<{
        username: string;
        hash: Uint8Array<ArrayBuffer>;
    } | null>;
}
export {};