import type { OAuthClientProvider, OAuthDiscoveryState } from '@modelcontextprotocol/sdk/client/auth.js';
import type { OAuthClientInformationMixed, OAuthTokens, OAuthClientMetadata } from '@modelcontextprotocol/sdk/shared/auth.js';
export interface KeychainBackend {
    read(): string | undefined;
    write(blob: string): void;
}
export interface OauthPendingEntry {
    status: 'oauth_pending';
    authorizationUrl: string;
    timestamp: number;
}
export declare function readOauthPending(): Record<string, OauthPendingEntry>;
export declare function clearOauthPending(serverName: string): void;
export declare class KeychainOAuthProvider implements OAuthClientProvider {
    private readonly serverName;
    private readonly backend;
    constructor(serverName: string, backend?: KeychainBackend);
    get redirectUrl(): string;
    get clientMetadata(): OAuthClientMetadata;
    clientInformation(): OAuthClientInformationMixed | undefined;
    saveClientInformation(info: OAuthClientInformationMixed): void;
    tokens(): OAuthTokens | undefined;
    saveTokens(tokens: OAuthTokens): void;
    saveCodeVerifier(codeVerifier: string): void;
    codeVerifier(): string;
    state(): string;
    saveDiscoveryState(state: OAuthDiscoveryState): void;
    discoveryState(): OAuthDiscoveryState | undefined;
    invalidateCredentials(scope: 'all' | 'client' | 'tokens' | 'verifier' | 'discovery'): void;
    redirectToAuthorization(authorizationUrl: URL): Promise<void>;
    private _readSlot;
    private _updateSlot;
}