/**
 * Co-signer client — routes orders through our builder attribution proxy.
 */
import type { CosignerRequest, BuilderCredentials, ExchangeVersion } from './types.js';
export interface CosignerConfig {
    cosignerUrl: string;
    polynodeKey: string;
    fallbackDirect: boolean;
    builderCredentials?: BuilderCredentials;
    exchangeVersion?: ExchangeVersion;
}
/**
 * Build L2 HMAC headers for Polymarket CLOB authentication.
 */
export declare function buildL2Headers(apiKey: string, apiSecret: string, apiPassphrase: string, walletAddress: string, method: string, path: string, body?: string): Record<string, string>;
/**
 * Send a request through the co-signer (adds builder headers, forwards to CLOB).
 * Falls back to direct CLOB submission if configured and co-signer fails.
 */
export declare function sendViaCosigner(config: CosignerConfig, request: CosignerRequest): Promise<any>;
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