Execution

Execute swaps through any protocol.

Router V3 is still undergoing an audit. Use at your own discretion. Funds stored in the router (including vault deposits) might be lost.

Tycho Execution provides tools for encoding and executing swaps against Tycho Router and protocol executors. It is divided into two main components:

• Encoding: A Rust crate that encodes swaps and generates calldata for execution.

• Executing: Solidity contracts for executing trades on-chain.

The source code for Tycho Execution is available here. For a practical example of its usage, please refer to our Quickstart.

Token transfers

You can transfer tokens in one of three ways with Tycho Execution:

• Permit2

• Standard ERC20 Approvals

• Using Vault funds

See how to change between these options when encoding here.

Permit2

Tycho Execution leverages Permit2 for token approvals. Before executing a swap via our router, you must approve the Permit2 contract for the specified token and amount. This ensures the router has the necessary permissions to execute trades on your behalf.

When encoding a transaction, we provide functionality to build the Permit struct. However, you are responsible for signing the permit.

For more details on Permit2 and how to use it, see the Permit2 official documentation.

Standard ERC20 Approvals

Tycho also supports traditional ERC20 approvals. In this model, you explicitly call approve on the token contract to grant the router permission to transfer tokens on your behalf. This is widely supported and may be preferred in environments where Permit2 is not yet available.

Using the Vault

The TychoRouter includes a built-in vault (ERC6909) that lets you deposit, hold, and withdraw tokens directly in the router contract. The vault tracks per-user balances, so your tokens are only accessible by you.

The router draws from your deposited balance instead of performing a transferFrom on your wallet. This saves gas (no approval or external transfer needed) and lets you use fees, proceeds from previous trades, or pre-positioned liquidity directly.

Fees earned through the fee-taking system are automatically credited to the fee receiver's vault balance, making them immediately available for future swaps or withdrawals.

More on the Vault here.

Security and Audits

The Tycho Router V2 has been audited by Maximilian Krüger. Past audits are here.

Router V3 is still undergoing an audit. Use at your own discretion. Funds stored in the router (including vault deposits) might be lost.

If you discover potential security issues or have suggestions for improvements, please reach out through our official channels.