/**
 * hosting/signin/errors — the sign-in pieces' construction and capacity
 * refusals, each naming what is at fault.
 */
/** A sign-in door option that cannot be honoured — `option` names it. */
export declare class SignInDoorConfigError extends TypeError {
    readonly code: "ERR_SIGN_IN_DOOR_CONFIG";
    /** The option at fault (`publicUrl`, `hours`, `guard`, `trustedProxies`, …). */
    readonly option: string;
    constructor(option: string, sentence: string);
}
/** A `memorySignIns` option that cannot be honoured — `option` names it. */
export declare class MemorySignInsConfigError extends TypeError {
    readonly code: "ERR_MEMORY_SIGN_INS_CONFIG";
    readonly option: string;
    constructor(option: string, sentence: string);
}
/**
 * The sign-in store is full of LIVE sign-ins and will not evict another
 * person's to make room — the new sign-in is refused (the door answers 503)
 * instead of signing somebody else out.
 */
export declare class SignInStoreFullError extends Error {
    readonly code: "ERR_SIGN_IN_STORE_FULL";
    constructor(max: number);
}
/**
 * A password check that never reached its backend — the directory could not
 * be connected to, or its TLS handshake failed — so the password was never
 * sent and nobody's lockout counter moved. The door un-counts the attempt.
 * Any OTHER error from a check (a bind that timed out after it was sent) keeps
 * the attempt counted: the directory may have charged it (review idI57 S-6).
 */
export declare class PasswordCheckUnreachableError extends Error {
    readonly code: "ERR_PASSWORD_CHECK_UNREACHABLE";
    constructor(sentence: string, options?: {
        cause?: unknown;
    });
}