import { type PathCtx } from '../config/paths.js';
/** Is this exact credential known to have been refused for good? */
export declare function loginIsKnownDead(fingerprint: string | null, c: PathCtx): boolean;
/** Why this credential was refused, for saying so once. */
export declare function deadLoginReason(fingerprint: string | null, c: PathCtx): string | undefined;
/** Record that this credential cannot be renewed, with the reason and when. */
export declare function rememberDeadLogin(fingerprint: string | null, detail: string, c: PathCtx, now?: number): void;
/** Forget one credential, for when it works again. */
export declare function forgetDeadLogin(fingerprint: string | null, c: PathCtx): void;