/**
 * HTTP Client
 *
 * Pluggable HTTP client with GNAP authentication integration.
 * Uses the native fetch API with support for auth header injection
 * and HTTP message signatures.
 */
import type { HttpClient, HttpRequest, HttpResponse, AuthProvider, GnapAuthConfig } from './types.js';
export declare class FetchHttpClient implements HttpClient {
    private authProvider?;
    constructor(authProvider?: AuthProvider);
    execute(request: HttpRequest): Promise<HttpResponse>;
}
/**
 * Auth provider that integrates with @flarcos/kiota-authentication-gnap
 * for GNAP token management and HTTP message signatures.
 */
export declare class GnapAuthProvider implements AuthProvider {
    private tokens;
    private config;
    constructor(config: GnapAuthConfig);
    /**
     * Set the access token for a specific source/context.
     */
    setToken(sourceName: string, token: string): void;
    /**
     * Set token by operation type for convenience.
     */
    setTokenForOperation(operationPrefix: string, token: string): void;
    getAuthHeader(sourceName: string, _operationId: string): Promise<string | undefined>;
    signRequest(request: HttpRequest): Promise<HttpRequest>;
    /**
     * Get the GNAP client wallet address for grant requests.
     */
    getClientWalletAddress(): string;
}
/**
 * Simple auth provider that uses static bearer tokens.
 * Useful for testing or when tokens are managed externally.
 */
export declare class BearerAuthProvider implements AuthProvider {
    private tokens;
    constructor(defaultToken?: string);
    setToken(sourceName: string, token: string): void;
    getAuthHeader(sourceName: string, _operationId: string): Promise<string | undefined>;
}
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