export interface PkcePair {
    verifier: string;
    challenge: string;
}
export interface TokenResponse {
    access_token: string;
    refresh_token?: string;
    expires_in?: number;
    token_type?: string;
    scope?: string;
}
export declare const DEFAULT_SCOPE = "memory:read memory:write offline_access";
export declare const pkcePair: () => PkcePair;
export declare const randomState: () => string;
export declare const registerClient: (authUrl: string, redirectUri: string) => Promise<string>;
export declare const buildAuthorizeUrl: (authUrl: string, params: {
    clientId: string;
    redirectUri: string;
    challenge: string;
    state: string;
    scope?: string;
}) => string;
export declare class TokenRequestError extends Error {
    readonly status: number;
    readonly oauthError?: string | undefined;
    constructor(status: number, oauthError?: string | undefined);
}
export declare const exchangeCode: (authUrl: string, params: {
    clientId: string;
    code: string;
    redirectUri: string;
    verifier: string;
}) => Promise<TokenResponse>;
export declare const refreshTokens: (authUrl: string, clientId: string, refreshToken: string) => Promise<TokenResponse>;
export declare const revokeToken: (authUrl: string, token: string, timeoutMs?: number) => Promise<void>;