Fetch 参数 - x402x-docs

签名

wrapFetchWithPayment(
  fetch: typeof globalThis.fetch,
  walletClient: WalletClient,
  maxValue?: string,
  paymentRequirementsSelector?: (r402: Response402) => PaymentRequirements
): typeof globalThis.fetch

说明

maxValue：最大允许支付额（强烈建议设置）
paymentRequirementsSelector：自定义选择 requirements

完整签名与类型

import type { WalletClient } from "viem";

type PaymentRequirementsSelector = (
  requirements: PaymentRequirements[],
  network?: string[],
  scheme?: string
) => PaymentRequirements;

interface X402Config {
  svmConfig?: {
    rpcUrl?: string;
  };
  evmConfig?: {
    rpcUrls?: Record<number, string>;
  };
}

wrapFetchWithPayment(
  fetch: typeof globalThis.fetch,
  walletClient: WalletClient,
  maxValue?: bigint,
  paymentRequirementsSelector?: PaymentRequirementsSelector,
  config?: X402Config
): typeof globalThis.fetch;

提示：maxValue 默认值应谨慎评估；生产环境建议显式设置以防止异常高额支付。