OpenZeppelin published a step-by-step guide on November 5, 2026 for building a USDT vault on the TRON network using Hardhat 2 and its dedicated plugins. The UsdtVault contract follows the TRC-4626 standard: when USDT is deposited, it issues vUSDT shares, while configurable entry and exit fees are transferred to a treasury. The guide also explains USDT’s non-standard behavior on TRON, where a transfer can succeed while returning false, and recommends using SafeTRC20 helpers and correctly handling its six decimals. Developers are instructed to deploy the contract on TRON’s Nile test network; the guide covers USDT only and does not constitute a security audit.
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