> For the complete documentation index, see [llms.txt](https://docs.harmony.one/home/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.harmony.one/home/developers/tutorials/using-crosschain-api/scripts.md).

# Scripts

## Using the Scripts the API

* These scripts will build the transactions required to call Harmony's production API, for more instructions on how to use the API check the [webserver repo](https://docs.harmony.one/home/developers/tutorials/using-crosschain-api/webserver)
* Make sure to rename the `env_file` to `.env` and add your private key.
* To run a script just execute the node file e.g. `node bridge_eth_to_one.js`

## The Scripts

* `bridge_eth_to_one.js` This script bridges ethereum BUSD to Harmony's ethereum BUSD
* `bridge_one_to_bsc.js` This script bridges Harmony's BSC BUSD to BSC BUSD
* `viper_swap.js` This script swaps Harmony's ethereum BUSD to Harmony's BSC BUSD to BSC BUSD
* `end_to_end.js` This script performs a full end-to-end swap from Ethereum BUSD to BSC BUSD


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