> For the complete documentation index, see [llms.txt](https://bitfi-2.gitbook.io/bitfi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bitfi-2.gitbook.io/bitfi/developer/bfbtc-overview/contract-parameters.md).

# Contract Parameters

The contract parameters are configured as follows:

<table><thead><tr><th>Chains</th><th>bfBTC Decimals</th><th>Underlying Assets Decimal</th><th>Min Stake Amount</th><th>Min Unstake Amount</th><th width="232.71875">Note</th></tr></thead><tbody><tr><td>ETH</td><td>8</td><td>0</td><td>0.0001 BTC (Bitcoin)</td><td>0.0001 bfBTC</td><td>Only support native deposit &#x26; native withdraw</td></tr><tr><td>BSC</td><td>8</td><td>18</td><td>0.0001 BTCB</td><td>0.0001 bfBTC</td><td></td></tr><tr><td>BTR</td><td>8</td><td>18</td><td>0.0001 BTC (Gas Token)</td><td>0.0001 bfBTC</td><td></td></tr><tr><td>HEMI</td><td>8</td><td>8</td><td>0.0001 hemiBTC</td><td>0.0001 bfBTC</td><td></td></tr><tr><td>BASE</td><td>8</td><td>0</td><td>0.0001 BTC (Bitcoin)</td><td>0.0001 bfBTC</td><td>Only support native deposit &#x26; native withdraw</td></tr><tr><td>CORE</td><td>8</td><td>0</td><td>0.0001 BTC (Bitcoin)</td><td>0.0001 bfBTC</td><td>Only support native deposit &#x26; native withdraw</td></tr><tr><td>GOAT</td><td>8</td><td>0</td><td>0.0001 BTC (Bitcoin)</td><td>0.0001 bfBTC</td><td>Only support native deposit &#x26; native withdraw</td></tr></tbody></table>