Initial commit to prepare for remote overwrite

lib/payment/alipay.ts

@@ -0,0 +1,75 @@
+import crypto from "crypto"
+
+export interface AlipayConfig {
+  appId: string
+  partnerId: string
+  key: string
+  returnUrl: string
+  notifyUrl: string
+}
+
+export class AlipayService {
+  constructor(private config: AlipayConfig) {}
+
+  // 创建支付宝订单
+  createOrder(params: {
+    outTradeNo: string
+    subject: string
+    totalAmount: number
+    body?: string
+  }) {
+    const orderInfo = {
+      app_id: this.config.appId,
+      method: "alipay.trade.wap.pay",
+      format: "JSON",
+      charset: "utf-8",
+      sign_type: "MD5",
+      timestamp: new Date().toISOString().slice(0, 19).replace("T", " "),
+      version: "1.0",
+      notify_url: this.config.notifyUrl,
+      return_url: this.config.returnUrl,
+      biz_content: JSON.stringify({
+        out_trade_no: params.outTradeNo,
+        product_code: "QUICK_WAP_WAY",
+        total_amount: params.totalAmount.toFixed(2),
+        subject: params.subject,
+        body: params.body || params.subject,
+      }),
+    }
+
+    const sign = this.generateSign(orderInfo)
+    return {
+      ...orderInfo,
+      sign,
+      paymentUrl: this.buildPaymentUrl(orderInfo, sign),
+    }
+  }
+
+  // 生成签名
+  generateSign(params: Record<string, string>): string {
+    const sortedKeys = Object.keys(params).sort()
+    const signString = sortedKeys
+      .filter((key) => params[key] && key !== "sign")
+      .map((key) => `${key}=${params[key]}`)
+      .join("&")
+
+    const signWithKey = `${signString}${this.config.key}`
+    return crypto.createHash("md5").update(signWithKey, "utf8").digest("hex")
+  }
+
+  // 验证回调签名
+  verifySign(params: Record<string, string>): boolean {
+    const receivedSign = params.sign
+    if (!receivedSign) return false
+
+    const calculatedSign = this.generateSign(params)
+    return receivedSign.toLowerCase() === calculatedSign.toLowerCase()
+  }
+
+  // 构建支付URL
+  private buildPaymentUrl(params: Record<string, string>, sign: string): string {
+    const gateway = "https://openapi.alipay.com/gateway.do"
+    const queryParams = new URLSearchParams({ ...params, sign })
+    return `${gateway}?${queryParams.toString()}`
+  }
+}