A Modular Technical Architecture for Time-?Bound Stablecoin Issuance Using TRC-20 and Middleware Integration

This paper presents the technical architecture of the FLASH USDT system, a modular and auditable stablecoin issuance and redemption framework built on the TRON blockchain using the TRC-20 token standard. The architecture is designed to support time?limited token lifecycles, batch-based issuance, administrative oversight, and external payment integration through middleware services such as BTCPay Server. Emphasis is placed on deterministic behavior, transparent auditability, and forward compatibility, allowing independent engineering teams to verify, deploy, and operate the system without dependency on the original developers. The proposed architecture balances operational simplicity with extensibility, making it suitable for short-duration stablecoin circulation under controlled exposure conditions.