The article explains why simple key‑based idempotency fails when a second request carries different parameters, and demonstrates how to use database row locks, request fingerprinting, state machines, and explicit error handling to guarantee safe, non‑duplicate execution in payment‑critical APIs.
This comprehensive guide explains what a settlement system is, outlines ten critical design steps—from data source identification to bill provision—and illustrates their application across diverse scenarios such as corporate welfare platforms, government services, promotion platforms, bank acquiring, points e‑commerce, ETC, and consumer finance, while highlighting key rules, workflows, and interface considerations.
This comprehensive guide explores the definition, historical evolution, overall architecture, and key functional modules of bank core systems—including account management, customer information, deposit and loan cores, payment and settlement, card relationships, and batch processing—providing a holistic, "god‑level" perspective on modern banking infrastructure.
This article provides a comprehensive overview of cross‑border payment, explaining its definition, common payment methods, detailed transaction flows for import and export models, the evolution of major payment institutions, and the technical and regulatory considerations involved in implementing such services.
This article explains how blockchain technology can speed up payment processing, simplify receipt handling, enable self‑executing smart contracts, cut transaction fees, and strengthen security, thereby transforming the payment landscape for online retailers.
The article describes a stable withdrawal system that integrates UnionPay and WangLian, emphasizing immutable serial numbers, strict exception handling, real‑time monitoring, multi‑stage compensation, a database‑driven routing engine handling up to 500 k transactions per hour, and an operations console for manual recovery, while outlining future optimizations.
During the 2015 Double‑11 shopping festival, Alipay processed a peak of 85,900 transactions per second—more than double the previous year and surpassing Visa—thanks to its self‑developed OceanBase database, multi‑active data‑center deployment, and hybrid cloud infrastructure, showcasing China’s leading payment‑system technology.
