import { SchemeNetworkClient, PaymentRequirements, PaymentPayloadContext, PaymentPayloadResult } from '@x402/core/types';
import { C as ClientEvmSigner } from '../../signer-B127taDR.js';
import { c as EvmSchemeOptions } from '../../rpc-DULZzRne.js';
export { d as UptoEvmSchemeConfig, e as UptoEvmSchemeConfigByChainId } from '../../rpc-DULZzRne.js';
export { P as Permit2AllowanceParams, c as createPermit2ApprovalTx, e as erc20AllowanceAbi, g as getPermit2AllowanceReadParams } from '../../permit2-DhJRUcgY.js';
import 'viem';

/**
 * EVM client implementation for the Upto payment scheme.
 * Handles Permit2-based payment payload creation and gas-sponsoring extensions.
 */
declare class UptoEvmScheme implements SchemeNetworkClient {
    private readonly signer;
    private readonly options?;
    readonly scheme = "upto";
    /**
     * Creates a new UptoEvmScheme instance.
     *
     * @param signer - The EVM signer for client operations
     * @param options - Optional RPC configuration
     */
    constructor(signer: ClientEvmSigner, options?: EvmSchemeOptions | undefined);
    /**
     * Creates a payment payload for the Upto scheme using Permit2.
     *
     * @param x402Version - The x402 protocol version
     * @param paymentRequirements - The payment requirements
     * @param context - Optional context with server-declared extensions
     * @returns Promise resolving to a payment payload result
     */
    createPaymentPayload(x402Version: number, paymentRequirements: PaymentRequirements, context?: PaymentPayloadContext): Promise<PaymentPayloadResult>;
}

export { UptoEvmScheme, EvmSchemeOptions as UptoEvmSchemeOptions };