Code Architecture

Tycho Execution offers an encoding tool (a Rust crate for generating swap calldata) and execution components (Solidity contracts). This is how everything works together.

The following diagram summarizes the code architecture:

Encoding

The TychoEncoder is responsible for validating the solutions of orders and providing the user with a list of transactions that you must execute against the TychoRouter or Executors.

At initialization, you can choose which SwapStrategyEncoder should the TychoEncoder use:

• SplitSwapStrategyEncoder:executes the transaction through the TychoRouter

• ExecutorStrategyEncoder: bypasses the TychoRouter and executes directly against our executors.

Internally, the user-selected SwapStrategyEncoder chooses the appropriate SwapEncoder(s) to encode the individual swaps, which depend on the protocols used in the solution.

Execution

The TychoRouter calls one or more Executors (corresponding with the output of the SwapEncoders) to interact with the correct protocol and perform each swap of the solution. The TychoRouter optionally verifies that the user receives a minimum amount of the output token.

If you select the ExecutorStrategyEncoder during setup, you must execute the outputted calldata directly against the Executor which corresponds to the solution’s swap’s protocol. Beware that you are responsible for performing any necessary output amount checks. This strategy is useful if you want to call Tycho executors through your own router. For more information direct execution, see here.