> For the complete documentation index, see [llms.txt](https://docs.leviathan.tools/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.leviathan.tools/task-creation/ethereum-virtual-machine/copy-cat.md).

# Copy Cat

Listens for transactions with supplied parameters in the mempool, then fires the transactions with perfect parameters to increase chances of being included in the same or following block.

{% hint style="danger" %}
Copy Cat will ONLY work on chains with a mempool. This means chains such as Optimism and Base that do not have a mempool can not run Copy Cat mode.
{% endhint %}

{% hint style="info" %}
Not all contracts will work with Copy Cat, a on chain toggle needs to be callable to enable/disable the function you want to call.
{% endhint %}

* **Module: `EVM`**
* **Chain:** Chain's name as defined in Chains.csv
* **Contract:** Contract address to interact with, followed by the address to watch for, seperating them with the `|` character; for example `0xbc4ca0eda7647a8ab7c2061c2e118a18a936f13d|0xaBA7161A7fb69c88e16ED9f455CE62B791EE4D03`
* Function: Function to use, followed by the function to listen for, seperating them with the `|` character; for example `mintApe|flipSaleState`
* **Input:** JSON Array Compliant Parameters for the mint tx followed by the parameters to match for the listening tx; for example `[1]|[]`
* **Quantity:** Value of ETH to send as part of the transaction, for example `0.15`
* **Mode:** `CopyCat`
* **Max Gas:** Maximum GWEI fee to pay for your transaction. Can be left empty to have no limit.
* **Gas Limit:** Set the transactions gas unit limit, is optional but reccomended to set to avoid transactions gas limit being too low.
* **Wallet ID:** Wallet ID corresponding to the wallet in wallets.csv you wish to use.