x402x

npm i x402x@beta

import type { PaymentRequirements, PaymentPayload, Response402 } from "x402x/types";

// 共享 EVM 工具
import { getChainId, getNetworkName } from "x402x/shared/evm";

// 支付方案工具（exact）
import { createExactPaymentRequirements, validateExactPayment } from "x402x/schemes";

// 验证工具
import { verifyPermitSignature, verifyEIP3009Signature, verifyPermit2Signature } from "x402x/verify";

// PaymentRequirements
interface PaymentRequirements {
  scheme: string;              // "exact"
  network: string;             // "bsc-testnet"
  maxAmountRequired: string;   // 金额（wei）
  asset: string;               // Token 地址
  paymentType?: string;        // permit/eip3009/permit2
  resource?: string;
  description?: string;
  mimeType?: string;
  maxTimeoutSeconds?: number;
  outputSchema?: Record<string, unknown>;
  extra?: Record<string, unknown>;
}

// Response402
interface Response402 {
  x402Version: number;           // 1
  accepts: PaymentRequirements[]; // 可接受的支付要求列表
  error?: string;
}

import { PaymentRequirementsSchema, Response402Schema } from "x402x/types";

const validated = PaymentRequirementsSchema.parse(unknownData);
const safe = Response402Schema.safeParse(unknownResp);

import type { Response402, PaymentRequirements } from "x402x/types";

function create402Response(accepts: PaymentRequirements[], error?: string): Response402 {
  return { x402Version: 1, accepts, error };
}

import { getChainId, getNetworkName } from "x402x/shared/evm";
const id = getChainId("bsc-testnet"); // 97
const name = getNetworkName(97);      // "bsc-testnet"