# tTokens & iTokens

Theo’s token architecture utilizes two custom smart contract standards:

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>tTokens</strong></td><td>Represent single products, adhering to ERC4626 for seamless DeFi integrations.</td><td><a href="ttokens-and-itokens/ttokens">ttokens</a></td></tr><tr><td><strong>iTokens</strong></td><td>Act as indexes for multiple tTokens and/or other iTokens.</td><td><a href="ttokens-and-itokens/itokens">itokens</a></td></tr></tbody></table>

## Core Features

This token architecture emphasizes several key principles:

* **Transparent On-chain Ownership**: Each vault issues ERC-20 compliant receipts, transparently mapping token holdings to underlying RWAs, ensuring clear and verifiable ownership.
* **Composable DeFi Integration**: Utilizing the ERC-4626 standard ensures straightforward interoperability with existing DeFi ecosystems, including DEXs, yield protocols, and money markets.
* **Institutional-Grade Security and Controls**: Built-in roles, pausability, and upgradeability mechanisms have been rigorously audited, providing a secure environment suitable for institutional participation.
* **Streamlined User Experience**: The system features configurable optimistic minting, significantly reducing delays in minting tokens, particularly for low-volatility RWAs.