# Tycho Execution

![img.png](banner.png)

Tycho Execution makes it easy to trade on different DEXs by handling the complex encoding for you. Instead of creating
custom code for each DEX, you get a simple, ready-to-use tool that generates the necessary data to execute trades. It's
designed to be safe, straightforward, and quick to set up, so anyone can start trading without extra effort.

## Quickstart

To get started, have a look at our [Quickstart example](examples/quickstart/README.md).

## Bin Usage Guide

### Installation

First, build and install the binary:

```bash
# Build the project
cargo build --release

# Install the binary to your system
cargo install --path .
```

After installation, the `tycho-encode` command will be available to use from any directory in your terminal.

### Commands

The command lets you choose the encoding strategy to be used. The available strategies are:

#### Tycho Router

`tycho-router`: Encodes a transaction using the Tycho Router encoding strategy. Requires a private key for signing
Permit2.

Example:

```bash
echo '<solution_payload>' | tycho-encode tycho-router --swapper-pk 0x123456789abcdef123456789abcdef123456789abcdef123456789abcdef1234
```

#### Direct execution

`direct-execution`: Encodes a transaction using the direct execution encoding strategy. Does not require a private key.

Example:

```bash
echo '<solution_payload>' | tycho-encode direct-execution
```

### Encoding Transactions

The commands accept the following options:

- `--config_path`: Path to the executor addresses configuration file (defaults
  to `src/encoding/config/executor_addresses.json`)
- `--swapper-pk`: Private key for signing approvals (required when direct_execution is false)

#### Example

Here's a complete example that encodes a swap from WETH to DAI using Uniswap V2 and the Tycho Router strategy:

```bash
echo '{"sender":"0x1234567890123456789012345678901234567890","receiver":"0x1234567890123456789012345678901234567890","given_token":"0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2","given_amount":"1000000000000000000","checked_token":"0x6B175474E89094C44Da98b954EedeAC495271d0F","exact_out":false,"slippage":0.01,"expected_amount":"1000000000000000000","checked_amount":"990000000000000000","router_address":"0xaa820C29648D5EA543d712cC928377Bd7206a0E7","swaps":[{"component":{"id":"0x88e6A0c2dDD26FEEb64F039a2c41296FcB3f5640","protocol_system":"uniswap_v2","protocol_type_name":"UniswapV2Pool","chain":"ethereum","tokens":["0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2"],"contract_ids":["0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D"],"static_attributes":{"factory":"0x5c69bee701ef814a2b6a3edd4b1652cb9cc5aa6f"},"change":"Update","creation_tx":"0x0000000000000000000000000000000000000000000000000000000000000000","created_at":"2024-02-28T12:00:00"},"token_in":"0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2","token_out":"0x6B175474E89094C44Da98b954EedeAC495271d0F","split":0.0}],"direct_execution":true}' | tycho-encode tycho-router --swapper-pk 0x123456789abcdef123456789abcdef123456789abcdef123456789abcdef1234  
```

#### JSON Payload Structure: Solution struct

The `Solution` struct is composed of the following fields:

- `sender`: The address initiating the transaction
- `receiver`: The address receiving the output tokens
- `given_token`: The address of the input token (e.g., WETH)
- `given_amount`: The amount of input tokens (in wei)
- `checked_token`: The address of the output token (e.g., DAI)
- `exact_out`: Boolean indicating if this is an exact output swap
- `slippage`: The maximum allowed slippage (e.g., 0.01 for 1%)
- `expected_amount`: The expected output amount
- `checked_amount`: The minimum acceptable output amount (accounting for slippage)
- `swaps`: Array of swap steps, each containing:
    - `component`: Details about the DEX/protocol being used
    - `token_in`: Input token address for this step
    - `token_out`: Output token address for this step
    - `split`: Proportion of tokens to route through this step (1.0 = 100%)
- `router_address`: The address of the protocol's router contract
- `direct_execution`: Boolean indicating if the transaction should be executed directly

## Contract Analysis

We use [Slither](https://github.com/crytic/slither) to detect any potential vulnerabilities in our contracts.

To run locally, simply install Slither in your conda env and run it inside the foundry directory.

```bash
conda create --name tycho-execution python=3.10
conda activate tycho-execution

pip install slither-analyzer
cd foundry
slither .
```