import { ethers } from "ethers";
import type { GateResponse, PaymentResult } from "./types.js";
/**
 * Execute a USDC payment through the Xenarch splitter contract.
 * Flow: check balance → check gas → approve USDC → call split()
 */
export declare function executePayment(gate: GateResponse, signer: ethers.Signer, usdcAddress: string): Promise<PaymentResult>;
/**
 * Verify a payment with the Xenarch platform and get an access token.
 */
export declare function verifyPayment(verifyUrl: string, txHash: string): Promise<{
    access_token: string;
    expires_at: string;
}>;
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