> For the complete documentation index, see [llms.txt](https://docs.bitlen.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bitlen.io/borrowing/borrowing-btc.md).

# Borrowing BTC

**How to Borrow BTC**&#x20;

BitLen is the first Decentralized Finance (DeFi) that allows users to lend native Bitcoin (BTC) and borrow Ethereum-based (ERC-20) tokens, and vice versa. Experience *multichain lending and borrowing* for the first time on DeFi, implemented with Optimistic BTC Lending. We ensure maximum security and the best user experience.

<figure><img src="/files/YC17TbmxnQo1W054FNjR" alt=""><figcaption><p>Borrow on BitLen</p></figcaption></figure>

**Deposit BTC, Borrow ETH (or ERC-20 tokens)**&#x20;

Once you have deposited BTC, you can start borrowing Ethereum-based (ERC-20) tokens against BTC collateral. Then, start leveraging the borrowed Ethereum-based tokens to earn even more BitLen token rewards. Click 'Borrow' and enter the amount to borrow. It will take some time for BitLen to process BTC borrowing as it verifies with several confirmations to securely process the multichain transaction.

Once complete, the borrowed asset can be found in your wallet.

**Deposit ETH (or ERC-20 tokens), Borrow BTC**

You can also deposit Ethereum-based (ERC-20) tokens to borrow BTC. Then, start leveraging the borrowed BTC to earn even more BitLen token rewards. Click 'Borrow' and enter the amount of BTC to borrow. It will take some time for BitLen to process this as it verifies with several confirmations to securely process the multichain transaction.


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