YuzucaPrivateClient（服务端 API 客户端）

import { YuzucaPrivateClient } from "@yuzuca/sdk";

const client = new YuzucaPrivateClient({
  apiKey: process.env.YUZUCA_PRIVATE_KEY!,
  serverUrl: "https://your-server.example.com",
});

常用能力：

• client.info.get()
• client.entitlements.check(...)
• client.usage.deduct(...)
• client.customers.create(...)
• client.customers.resolve(identifier)
• client.customers.get(customerId)
• client.subscriptions.activate(...)
• client.codes.redeem(...)

const customer = await client.customers.create({
  username: "customer_001",
  password: "secret",
  identifiers: [
    { type: "email", value: "user@example.com" },
    { type: "external_user_id", value: "u_1001" },
  ],
});

const resolved = await client.customers.resolve({
  type: "external_user_id",
  value: "u_1001",
});

const entitlement = await client.entitlements.checkOne({
  customer: { type: "external_user_id", value: "u_1001" },
  feature: "image-generate",
  required: 1,
});

await client.usage.deduct({
  customer: { type: "email", value: "user@example.com" },
  feature: "image-generate",
  amount: 1,
});