finance

0 articles

Prisma Optimistic Locking in Practice: Dual-Currency Wallet System with Audit Trail for Financial Tracking

An in-depth analysis of a production-grade NestJS wallet service, covering Prisma update where optimistic locking, dual-currency accounting (cash + coins), freeze/unfreeze mechanisms, and complete transaction flow tracking.

Backend Development

Financial Audit System: NestJS Xendit Payout + @DistributedLock + Cron Ghost Order Auto-Recovery

In-depth analysis of a production-grade financial audit system, covering distributed locks to prevent duplicate payouts, Xendit third-party payout integration, Cron auto-recovery mechanisms, and a complete state machine design.

Backend Development

Full Payment Process Chain — API Xendit → Flutter App → admin-next Financial Audit

NestJS PaymentService (Xendit Invoice/Payout Gateway) → ClientWalletService (Deposit/Withdrawal/Webhook Callback Business Logic) → admin-next Finance Page (WithdrawalList, DepositList, TransactionList)

Management Backend

admin-next Recharge Sync and Transaction Flow Tracking — DepositList / TransactionList Detail Modal System

In-depth analysis of the manual sync mechanism for the recharge list in the admin-next finance module, the layout of the recharge detail modal, the color-coding system for the transaction flow list, and the multi-section information presentation of the transaction detail modal.

Management Backend

admin-next Financial Audit Workflow — Withdrawal Audit + Manual Adjustment

An in-depth analysis of three core components of the Admin Next financial module: WithdrawalList (smart withdrawal list), WithdrawAuditModal (audit modal), and ManualAdjustModal (manual adjustment modal), revealing the complete implementation pattern of SmartTable + audit state machine + Zod forms.

Management Backend