export interface GuestAuthentication {
    scheme: 'guest';
}
export interface KeyAuthentication {
    scheme: 'key';
    key: string;
}
export interface TokenAuthentication {
    scheme: 'token';
    token: string;
}
export interface ExternalAuthentication {
    scheme: 'external';
    issuer: string;
    token: string;
}
export interface PlainAuthentication {
    scheme: 'plain';
    password: string;
}
export interface TransportAuthentication {
    scheme: 'transport';
    pfx?: Uint8Array;
    cert?: Uint8Array | string;
    key?: Uint8Array | string;
    ca?: Uint8Array | string | Array<Uint8Array | string>;
    passphrase?: string;
    rejectUnauthorized?: boolean;
}
export type Authentication = GuestAuthentication | KeyAuthentication | ExternalAuthentication | PlainAuthentication | TokenAuthentication | TransportAuthentication;
export type NonTransportAuthentication = Exclude<Authentication, TransportAuthentication>;
export declare function assertNonTransportAuth(auth: unknown, senderName: string): void;
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