OpenZeppelin publishes guide for building USDT vaults on TRON

A new Hardhat tutorial walks developers through a TRC-4626 vault and USDT's quirky transfer behavior OpenZeppelin has published a step-by-step developer guide for building a USDT vault on the TRON network. The tutorial, titled “Build a USDT vault on TRON with Hardhat,” went live on November 5, 2026. What the guide actually teaches The tutorial centers on a contract called UsdtVault, which extends TRC-4626. That is TRON’s tokenized vault standard, a shared template for contracts that take in an asset and issue shares in return. When a user deposits USDT, the vault mints vUSDT shares to represent their stake. The guide also adds configurable fees on the way in and on the way out. Those entry and exit fees are routed to a treasury address, which gives builders a basic revenue model baked into the contract. USDT on TRON is the only asset the guide references. This is a single-purpose blueprint, not a general toolkit for every token on the chain. On the tooling side, the setup calls for Hardhat 2 alongside OpenZeppelin’s TRON-specific plugins. Once the contract is written, the tutorial walks developers through deploying it to TRON’s Nile testnet for verification. The full walkthrough li...