import { type AbstractSigner } from "ethers";
import type { X402PaymentPayload, X402PaymentRequirements, X402ResourceInfo } from "./types.js";
/** Plain EVM wallet x402 sign — no TYI, no pending_x402 required. */
export declare function signExternalX402Payment(signer: AbstractSigner, input: {
    accepted: X402PaymentRequirements;
    resource?: X402ResourceInfo;
}): Promise<X402PaymentPayload>;
/** External buyer: sign 402 challenge + retry vendor. */
export declare function payVendorAsExternalWallet(input: {
    vendorUrl: string;
    signer: AbstractSigner;
    paymentRequiredHeader: string;
}): Promise<{
    status: number;
    paymentSignatureHeader: string;
}>;
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