import type { EdictHostAdapter } from "./host-adapter.js";
/** Options for BrowserHostAdapter construction. */
export interface BrowserHostAdapterOptions {
    /** Environment variable map. Lookups return "" for missing keys. */
    envMap?: Record<string, string>;
}
/**
 * Browser/edge runtime adapter with functional crypto and optional HTTP.
 *
 * - Crypto: pure-JS SHA-256, MD5, HMAC (synchronous, no Web Crypto API)
 * - HTTP: sync XMLHttpRequest (deprecated but functional in main thread)
 * - File IO: returns structured errors (no filesystem in browser)
 * - env: configurable via constructor envMap
 */
export declare class BrowserHostAdapter implements EdictHostAdapter {
    private readonly envMap;
    constructor(options?: BrowserHostAdapterOptions);
    sha256(data: string): string;
    md5(data: string): string;
    hmac(algo: string, key: string, data: string): string;
    fetch(url: string, method: string, body?: string): {
        ok: boolean;
        data: string;
    };
    readFile(_path: string): {
        ok: false;
        error: string;
    };
    writeFile(_path: string, _content: string): {
        ok: false;
        error: string;
    };
    env(name: string): string;
    args(): string[];
    exit(code: number): never;
}
//# sourceMappingURL=browser-host-adapter.d.ts.map