import { type AiContextSigningKeySetV1 } from '@nexusclaw/shared';
export interface ResolveOnlineSigningKeyInput {
    readonly keyId: string;
    readonly expectedIssuer?: string;
    readonly fetchKeySet: () => Promise<AiContextSigningKeySetV1>;
    readonly now?: Date;
}
export declare class AiContextSigningKeyCache {
    private readonly cachePath;
    constructor(cachePath?: string);
    resolveLocal(keyId: string, expectedIssuer?: string, now?: Date): AiContextSigningKeySetV1;
    resolveOnline(input: ResolveOnlineSigningKeyInput): Promise<AiContextSigningKeySetV1>;
    store(keySet: AiContextSigningKeySetV1, fetchedAt?: Date): void;
    private hasUsableKey;
    private read;
    private write;
}