interface StorageProvider {
    get(key: string): Promise<string | undefined>;
    set(key: string, value: string, expiresAt?: string): Promise<void>;
    remove(key: string): Promise<void>;
}
declare class CookieStorage implements StorageProvider {
    get(key: string): Promise<string | undefined>;
    set(key: string, value: string, expiresAt?: string): Promise<void>;
    remove(key: string): Promise<void>;
}
/**
 * Extracts the project ID from an API key for cookie scoping.
 * This ensures each project has its own JWT storage to prevent audience mismatch issues.
 * Falls back to "default" if the API key is invalid or missing.
 */
declare function getProjectIdFromApiKey(apiKey: string | undefined | null): string;
/**
 * Cookie storage that scopes cookies by project ID.
 * This prevents JWT conflicts when switching between different projects.
 *
 * For reads: scoped cookies are checked first. For refresh tokens only,
 * falls back to legacy unscoped cookies so the token can be sent to the
 * server for validation. The caller (CrossmintAuthClient) is responsible
 * for verifying the JWT audience after refresh and calling
 * `deleteLegacyCookies()` to clean up the legacy cookies once the
 * audience has been verified.
 */
declare class ScopedCookieStorage implements StorageProvider {
    private projectId;
    constructor(apiKey: string);
    getProjectId(): string;
    private getScopedKey;
    get(key: string): Promise<string | undefined>;
    set(key: string, value: string, expiresAt?: string): Promise<void>;
    remove(key: string): Promise<void>;
    /**
     * Delete legacy unscoped cookies after a successful, verified refresh.
     * Called by CrossmintAuthClient once the JWT audience has been confirmed
     * to match the current project.
     */
    deleteLegacyCookies(): void;
}
declare function getDefaultStorageProvider(): StorageProvider;
declare function getScopedStorageProvider(apiKey: string): StorageProvider;

export { CookieStorage, ScopedCookieStorage, type StorageProvider, getDefaultStorageProvider, getProjectIdFromApiKey, getScopedStorageProvider };