先在宿主完成真实登录并取得当前用户 Token，再 grow.identify。浏览器请求不传客户 ID。当前读接口与屏幕组件读取同一份会员、余额和验证交易；数据保持私有，不缓存成公开设计。
数量、余额和费率使用十进制字符串。过滤作用于全历史，再使用带微秒和记录类型的游标分页。报价不扣款；消费、预扣、确认、释放和原价退款只能由可信后端执行。
后端消费需要 credits:consume；退款另外需要 credits:manage。报价、账本与持有分别需要 credits:read、credits:read 和 entitlements:read。当前余额执行只开放明确的 Sandbox 范围。
const { holdings } = await grow.readHoldings();const { ledger } = await grow.readLedger({ type: null, from: null, to: null, after: null, limit: 50,});// Read the next page with ledger.nextCursor; preserve the entire cursor.const { quote } = await grow.quoteBalance({ operation: "quote", entitlementId, quantity: "1", properties: {},});const { receipt } = await groove.mutateBalance({ customerId: verifiedCustomer.id, command: { operation: "consume", entitlementId, quantity: "1", properties: {}, idempotencyKey: `job:${job.id}`, },});// Retry the same job with its original idempotencyKey and input.